From: owner-krnet-l-digest@teleport.com[SMTP:owner-krnet-l-digest@teleport.com] Sent: Wednesday, July 08, 1998 10:54 AM To: krnet-l-digest@teleport.com Subject: krnet-l-digest V2 #112 krnet-l-digest Wednesday, July 8 1998 Volume 02 : Number 112 ---------------------------------------------------------------------- Date: Tue, 7 Jul 1998 19:53:04 EDT From: BSHADR@aol.com Subject: Re: KR: interesting info In a message dated 98-07-07 17:25:21 EDT, Mike wrote: << Go to: http://www.ellison-fluid-systems.com/homebuilt_court_decision.htm >> Yep...this wingnut totaled a garage 3 blocks from my house. Everyone at our airport hopes he never is a PIC again! The utility company is after him for $75,000, Allstate wants their money back on the home repair and AVEMCO is not willing to get anywhere near the joker... On the other side of this issue, due to this case, we are trying to get a clear written protocol from our local FSDO office on what constitutes a need for an FAA sign off. They have been pretty good at not putting anything much in writing, preferring to tell us to interpret the regs and it will be clear &%##@?! Grrrrrrr...It seems a prop change, same material - different mfg, needs a look see and written approval from our FSDO office before we can fly the plane. No word how long we get to wait before they will render an approval. They were making noises about MIDO "...needing to look the change over..." and that it "...takes time..." Be cognizant of this problem if you want to be sure your insurance is in full force if you make any changes that may effect the flight. This case is already a point scored for the insurance company. Since it was in federal court, all future cases will likely jump on this bandwagon. As has been said before, there now may be more inadvertent omissions in logbooks… Randy Stein BSHADR@aol.com ------------------------------ Date: Tue, 07 Jul 1998 19:12:35 From: Austin Clark Subject: Re: KR: Front Deck Questions At 06:45 7/7/98 -0700, you wrote: >Austin Clark wrote: >> >> I got a pretty good start on my front deck this weekend and would like some >> input on it's construction. I plan to make it removeable using the piano >> hinge technique. What are some thoughts on the fuel tank being a seperate >> assembly vs an integral part. Does someone have a photo on their web page >> showing detail of how it mounts to the firewall. I have thought about >> making a double flange, one on the inside of the firewall for the deck and >> one on the outside for the cowling. Appreciate any comments. >> >> Austin Clark >> Pascagoula, MS >> >> > >Austin, > >I sent out pictures of how I did it to someone to scan, but I cant >recall who I sent them to. Can someone refresh my memory? > >Tom Crawford >tomc@afn.org >Gainesville, FL >N262TC > > At 06:45 7/7/98 -0700, you wrote: Tom Crawford Wrote: > >I sent out pictures of how I did it to someone to scan, but I cant >recall who I sent them to. Can someone refresh my memory? > >Tom Crawford >tomc@afn.org >Gainesville, FL >N262TC > > Tom, Rich Parker has them posted on his web page. I took a look at them last night and I think I am going to do the same thing. I archived a post you made a while back about how you made the straps that hold the tank. How did you provide access to the fuel cap through the front deck? I want to build in rain protection for this area as well as at the interface between the front deck and firewall. Maybe a flange with a channel that diverts water down and out through a drain tube of some sort?? I have the bulk of the front deck finished using Mark Langford's technique, but in reverse. I added a piece of spruce and ply on top of the longerons where the deck mounts that brings this area to the same level as the top shelf. I built a lip on the deck that overhangs that part so there is no way for water to enter. Maybe I am a little paranoid, but I have had to set down before and wait out a drenching rain. Austin Clark Pascagoula, MS ------------------------------ Date: Tue, 07 Jul 1998 17:45:35 -0700 From: Micheal Mims Subject: Re: KR: interesting info At 07:53 PM 7/7/98 EDT, you wrote: The utility company is after him for >$75,000, Allstate wants their money back on the home repair and AVEMCO is not willing to get anywhere near the joker... > This is not the first time I have heard of AVEMCO trying to back out of their liability. There was a fishing lodge across the street from my old house that crashed a Beaver and killed 4 high profile people (owned logging companies) and AVEMCO tried every trick in the book to get out of paying, actually there still trying! Its been four years now and AVEMCO is trying to prove the Beaver is a dangerous airplane. This after failed attempts at proving the pilot was incompetent, the pilot training provided by the lodge was inadequate, the AI who signed off the annual was incompetent and deliberately skipped ADs, and something else. Another hunter who was fully insured by AVEMCO for off airport operations,.. crashed his cub taking off from a remote strip and killed himself and passenger. AVEMCO never paid, they said the pilot was incompetent to operate from the remote strip. I sure hope that all insurance companies arent like this! I don't know who I will go with but its kinda scary thinking you could be wasting your money and operating with a false sense of security. zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz Micheal Mims SP290,.. Filling and sanding now! mailto:mikemims@pacbell.net http://www.geocities.com/CapeCanaveral/Hangar/4136/ Irvine Ca Fax 949.856.9417 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------------------ Date: Tue, 07 Jul 1998 19:50:04 -0500 From: Bobby Muse Subject: Re: KR: Front Deck Questions At 03:24 PM 7/6/98, you wrote: >I got a pretty good start on my front deck this weekend and would like some >input on it's construction. I plan to make it removeable using the piano >hinge technique. What are some thoughts on the fuel tank being a seperate >assembly vs an integral part. Does someone have a photo on their web page >showing detail of how it mounts to the firewall. I have thought about >making a double flange, one on the inside of the firewall for the deck and >one on the outside for the cowling. Appreciate any comments. > > >Austin Clark >Pascagoula, MS > > > My forward deck is the top of my tank - it's all one piece. By making a separate tank and deck cover you will add weight, allow for less fuel and add complexity to the KR. KISS Bobby Muse(N122B) mailto:bmuse@mindspring.com Wimberly, TX ------------------------------ Date: Tue, 07 Jul 1998 21:12:05 -0400 From: Bob Kash Subject: Re: KR: Count ME In, Purchased the Spruce Hi Trent, I'm Bob Kash from Va. I might be a month or two ahead of you (getting ready to join the sides). I built a Mini-max using only T-88. Our weather is similar with more humidity. The plane is 4 years old and I fly it almost every week. Maybe we will be the next generation of Knetters! Trent Flemming wrote: > Hello group, > > I recieved my Spruce the other day from Alpha Aviation in Greenville, TX. > I have a question regarding glue, I bought some T-88, but was wondering > what everybody used for the fuselage. Our East Texas weather has been > running in the Mid 90's to Low 100's (hot) and the humidity has been between > 50% and 80% most of the time. Is T-88 the glue (epoxy) for me or should I > use Aerolite Glue. > > Also is there anyone else on this list that is just getting started on there > KR project. > > Thanks for the help. > Looking forward to meeting some of ya'll and seeing some nice KR's at the > Perry Flyin. > > FYI > > My Name Trent Flemming > Location East Texas (Longview) > Project KR-2S > Percent Completed Just a large dent in the wallet for Spruce. :) > > Thanks again ------------------------------ Date: Tue, 7 Jul 1998 21:24:38 EDT From: Willard561@aol.com Subject: KR: Re: Trailing link landing gear try Pazmany's book I think it has some info, also go look under a Mooney Bill Higdon Willard561@aol.com ------------------------------ Date: Tue, 7 Jul 1998 21:55:25 EDT From: DFCPAC@aol.com Subject: KR: vw carbs. i have a revmaster 2100d, and it has one ot the older carbs. i'm not sure how to adjust the mixtures on it. does anyone have any info on it. there are 2 adjustments screws one has a spring, the other is smaller. which one is the idle adj.? ------------------------------ Date: Tue, 07 Jul 1998 19:01:40 -0700 From: Micheal Mims Subject: KR: more good reading go to: http://www.ellison-fluid-systems.com/article/fuelsystemsforhomebuilts/fuelsy stems.htm zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz Micheal Mims SP290,.. Filling and sanding now! mailto:mikemims@pacbell.net http://www.geocities.com/CapeCanaveral/Hangar/4136/ Irvine Ca Fax 949.856.9417 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------------------ Date: Tue, 07 Jul 1998 19:02:28 -0700 From: Micheal Mims Subject: Re: KR: vw carbs. At 09:55 PM 7/7/98 EDT, you wrote: >i have a revmaster 2100d, and it has one ot the older carbs. i'm not sure how >to adjust the mixtures on it. does anyone have any info on it. there are 2 >adjustments screws one has a spring, the other is smaller. which one is the >idle adj.? > If you call Revmaster they will send you a manual for your carb. zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz Micheal Mims SP290,.. Filling and sanding now! mailto:mikemims@pacbell.net http://www.geocities.com/CapeCanaveral/Hangar/4136/ Irvine Ca Fax 949.856.9417 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------------------ Date: Tue, 07 Jul 1998 19:11:46 PDT From: "Jody Wallace" Subject: KR: RE:trailing link gear Bill, Thanks for responding to my request. Perhaps I should have asked a better question. I've been seeking vendors of new trailing link gear for light aircraft. I can't believe there isn't anyone who carries these. Some Lance Airs also use this type of gear. I found several companies that produce landing gear for large aircraft (Boeings). Infinity makes a cool gear for canard type byrds. I'll keep looking. ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com ------------------------------ Date: Tue, 07 Jul 1998 22:12:52 -0400 From: Tom Andersen Subject: KR: Stabilizer enlargement Netters, After building the 1/4 scale model KR-2S I've decided the elevator size will remain stock, but the stabilizer will be enlarged quite a bit. To see the planned changes, go to my web page where I have updated the site with the stock and enlarged versions. I'm going with 8" increased span (total), a longer nose rib, and great big strakes. http://home.att.net/~tomkr2s/index.htm After seeing Troy Petteway's mods, I might trim the span of the elevators down a bit. So many exciting mods are definitely improving the breed. I feel lucky to be in such a good circle of builders and I feel sorry for those who are going it alone. - -Tom ------------------------------ Date: Tue, 07 Jul 1998 19:28:06 PDT From: "Jody Wallace" Subject: KR: Horizontal stabilizer size Hey Mark, I'm wondering why you lengthened your stabilizer but kept the area about the same as stock. I'm just starting to get into the nuts and bolts of aerodynamics. If the horizontal stabilizer is the main thing that controls pitch and KR's are kinda' pitchy...it seems to me that a decrease in area would make it less pitchy. I know this is an over-simplification because it says nothing about moment arm, airspeed, drag and probably several other things. Is the moment arm from c.g. to tail on the KR-2S longer?...I don't have but KR-2 plans at this time. JW (Mr. Curious) ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com ------------------------------ Date: Tue, 7 Jul 1998 22:31:00 -0500 From: "Mark Langford" Subject: KR: RE: Horizontal stabilizer size > I'm wondering why you lengthened your stabilizer but kept the area about > the same as stock. I'm just starting to get into the nuts and bolts of > aerodynamics. If the horizontal stabilizer is the main thing that > controls pitch and KR's are kinda' pitchy...it seems to me that a > decrease in area would make it less pitchy. Jody, If you have huge feathers on an arrow it takes a lot to upset it. Take the feathers off and you're in trouble. Same with the horizontal stab. The penalty for a larger stab is drag, but I'm willing to take that one. The h/s area (tail volume) on the KR is so small as to not even be on the chart. The KR2S is 14 inches longer between the wing and tail, and the h/s is larger as well. Definitely better, but needs a little more for my taste. Mark Langford, Huntsville, Alabama mailto:langford@hiwaay.net see KR2S N56ML at http://home.hiwaay.net/~langford/kr2s.html ------------------------------ Date: Tue, 07 Jul 1998 22:33:40 From: * Flesner * Subject: Re: KR: SOOb question At 03:04 PM 6~30~98 -0700, you wrote: >Tom Andersen wrote: >> >> Mike, >> Maybe I have mismarked the position of the thrust line but I thought it was at the top of >> the upper crossmember. >> -Tom > >I don't know where it is, do the plans even say? I thought it was >supposed to be at the longeron or slightly below. ========================================================= Check the large drawing that shows the side view of the motor mount. With this drawing and a VW engine you should be able to locate the designed thrust line with no problem. I'm using a HAPI mount with an 0-200 (the same as Martin Roberts) and an eyeball measurement puts my thrustline very near the center of the upper crossmember. Larry Flesner ------------------------------ Date: Tue, 07 Jul 1998 22:34:02 From: * Flesner * Subject: Re: KR: Pan Head Screws At 08:17 PM 7~1~98 -0700, you wrote: >Aileron Heads, the manual says to use 8/32 pan head screws every 6 inches. >I wanted to use MS 35190 screws (page 86 on AS&S cat) with skin washers >A3235-017-935 (page 91). Any thought out there on this? > >Micheal Mims =========================================================================== I think I used the 100 degree flathead (MS24694) . The tensil strength appears to be more than double the MS35190. How would you get 10 degrees down aileron with pan head screw holding the hinges in place? Yes, the text says panhead screws but the picture in drawing number 71 shows flathead screws. Flatheads seemed the way to go. Larry Flesner ------------------------------ Date: Tue, 07 Jul 1998 21:13:04 PDT From: "Jody Wallace" Subject: KR: Tail feathers Mark, You're arrow explanation is a good one. I agree that a larger stab will increase stability around the pitch axis in level flight. It will also give you great control at slow airspeeds...at rotation. Do you think the touchy pitch is due to size (width) of the elevator area? If lift is equal to Coefficient of lift * wing area * V^2 * ( air density/2), and you have a wide range of velocity to account for, and you can't change air density, then whats left to do? Perhaps decreasing control input is the best solution. I learned to drive...I learned to fly...and Lord willing I will learn to fly a KR. You got a great web page. Thanks for your input ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com ------------------------------ Date: Tue, 07 Jul 1998 21:58:09 -0700 From: Micheal Mims Subject: Re: KR: Stabilizer enlargement At 10:12 PM 7/7/98 -0400, you wrote: I'm going with 8" increased span(total), a longer nose rib, and great big strakes. http://home.att.net/~tomkr2s/index.htm >>> Man those top view shots of the KR2S really show what wrong eh? Just look at that picture on the left! Your headed in the right direction Tom. FYI While I was running the data for a stock KR2S through the spreadsheets from Roncz I found the horizontal tail needed to be 2.5 square feet larger at a minimum. Mine is right at 2.5 square feet larger and like you, I may install strakes to add a few more. zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz Micheal Mims SP290,.. Filling and sanding now! mailto:mikemims@pacbell.net http://www.geocities.com/CapeCanaveral/Hangar/4136/ Irvine Ca Fax 949.856.9417 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------------------ Date: Tue, 07 Jul 1998 22:23:17 -0700 From: Micheal Mims Subject: Re: KR: Stabilizer enlargement Netters, just for kicks I drew up a semi-scale top view using Toms drawings of a stock KR2S and my horizontal stab. Check it out at: http://www.geocities.com/CapeCanaveral/Hangar/4136/tail2.html zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz Micheal Mims SP290,.. Filling and sanding now! mailto:mikemims@pacbell.net http://www.geocities.com/CapeCanaveral/Hangar/4136/ Irvine Ca Fax 949.856.9417 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------------------ Date: Wed, 8 Jul 1998 02:28:32 EDT From: JEHayward@aol.com Subject: Re: KR: Stabilizer enlargement In a message dated 7/7/98 11:36:03 PM Mountain Daylight Time, mikemims@pacbell.net writes: << Netters, just for kicks I drew up a semi-scale top view using Toms drawings of a stock KR2S and my horizontal stab. >> The last KR fly-in I attended ('95) had a couple of fellows discussing the size of the horizontal stabilizer. The talk was of enlarging the chord rather than the span to greatly decrease the possibility of flutter. Was this a true concern or just hangar talk? Jim Hayward Rapid City, SD ------------------------------ Date: Wed, 08 Jul 1998 02:34:14 EDT From: miketnyc@juno.com (Michael Taglieri) Subject: Re: KR: Front Deck Questions >My forward deck is the top of my tank - it's all one piece. By making >a >separate tank and deck cover you will add weight, allow for less fuel >and >add complexity to the KR. > >KISS If you need to get the front deck off and the tank is full, how many fuel lines do you have to disconnect, and how heavy is the thing to pick up? Or do you have to drain the tank before you can do anything? Mike Taglieri _____________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com Or call Juno at (800) 654-JUNO [654-5866] ------------------------------ Date: Tue, 07 Jul 1998 23:49:09 -0700 From: Ross Youngblood Subject: KR: Bummer... 1/2 Compu-Fire dead Well, I'm bummed. The good news is I'm going to Arlington Thursday night... so I have somthing to do while I consider what to do about my half dead Compu-Fire ignition module. I had attempted to time my engine last Sunday, but it seemed that my timing light was dead... since the thing is 10+ years old and has been sitting in the bottom of various toolboxes for the last five years, I thought I'd go out and buy a new one. So this evening I went out to warm the engine up, time it, then put the prop on to go through some more break in. Well guess what. What I didn't mention Sunday was that the CHT & EGT for CYL#3 were reading cold, or nearly so. I just figured that I had wired up the thermocoples wrong, but I also noticed that these cylinders seemed cooler than the front ones Sunday night, but by the time I was checking them it had been some time since shut down, so I just figured I'd keep an eyeball peeled. So today, when the new timing light failed to blink on the #1 cyl, I decided it might be a good idea to check another cyl, and guess what... my timing light works. No spark to #3 and #1 cylinders. So, I double checked the wiring extension from the distributor to the unit, and it ohmed out OK, so unless the pick up is hosed, I have a blown "coil" on the Compu Fire unit. Bummer Dude! The good news is this explains why my two cylinders seemed to be running cold, and why it was so hard to start. Maybe I can sell the Compu-Fire unit to someone with a 1/2 VW engine :). It ran really good with only two cylinders but it's probably not the best way to begin the break-in cycle. UGH! DOH! I'm going to see if they do repairs. I had to machine some clearance for some AN-3 bolts on the heat sink, and I'd hate to do this all over for a new unit... plus, I don't want to shell out another $280 or so for another one... I could have gotten a magneto for the price of two Compu-Fire units (almost). The good news is that in the process of re-reading the Compu-Fire ignition notes, I learned I had gapped the plugs wrong... The Compu-Fire manual suggests widening the gap to .050 as it can handle a much larger gap. Grrr! Since I kinda want all 4 cylinders to be running, I am going to have to get this unit repaired, buy a new one, or get a magneto. I kinda want to send it back to them to discover what went wrong. I'm not too keen on the idea of getting another one, and blowing it up, if that is what happened. I doubt this, as if I am going to blow somthing up, I like to do a good job, and would have blown both sides. I knew this fun stuff was too good to be true... back to sanding the wings I guess. - -- Regards Ross ------------------------------ Date: Wed, 08 Jul 1998 00:02:07 -0700 From: Ross Youngblood Subject: Re: KR: Pan Head Screws I recall the same situation, and I bought the 100 deg flathead and the nifty counter sink bit from ACS. -- Regards Ross * Flesner * wrote: > At 08:17 PM 7~1~98 -0700, you wrote: > >Aileron Heads, the manual says to use 8/32 pan head screws every 6 inches. > >I wanted to use MS 35190 screws (page 86 on AS&S cat) with skin washers > >A3235-017-935 (page 91). Any thought out there on this? > > > >Micheal Mims > > =========================================================================== > > I think I used the 100 degree flathead (MS24694) . The tensil strength > appears to be more than double the MS35190. How would you get > 10 degrees down aileron with pan head screw holding the hinges > in place? Yes, the text says panhead screws but the picture in drawing > number 71 shows flathead screws. Flatheads seemed the way to go. > > Larry Flesner ------------------------------ Date: Wed, 08 Jul 1998 00:04:49 -0700 From: Ross Youngblood Subject: Re: KR: Front Deck Questions Mike, On my header tank I have to drain the tank to remove it. I have a sight gauge which is 2 fittings, and the fuel sump from the bottom is the third. If I put quick disconnects for the sight gauge and re-install a shutoff on the bottom of the sump, then I can just slosh the fuel around and pull it out. It only holds 5 gal, but it would still be kinda difficult to pull with full fuel. -- Ross Michael Taglieri wrote: > >My forward deck is the top of my tank - it's all one piece. By making > >a > >separate tank and deck cover you will add weight, allow for less fuel > >and > >add complexity to the KR. > > > >KISS > > If you need to get the front deck off and the tank is full, how many fuel > lines do you have to disconnect, and how heavy is the thing to pick up? > Or do you have to drain the tank before you can do anything? > > Mike Taglieri > > _____________________________________________________________________ > You don't need to buy Internet access to use free Internet e-mail. > Get completely free e-mail from Juno at http://www.juno.com > Or call Juno at (800) 654-JUNO [654-5866] ------------------------------ Date: Wed, 08 Jul 1998 00:15:12 -0700 From: Ross Youngblood Subject: KR: Compu-Fire Sites I discovered Steve Bennetts New GPASC site http://www.greatplainsas.com while looking for Compu-Fire on the net. Nifty Site! Check it out if like me... you haven't been looking at engine stuff for a while. COMPU-FIRE has a website at http://www.compufire.com, but it's currently under construction... - -- Regards Ross ------------------------------ Date: Wed, 8 Jul 1998 05:08:12 -0500 From: "Mark Langford" Subject: RE: KR: Stabilizer enlargement Jim Hayward wrote: > The last KR fly-in I attended ('95) had a couple of fellows > discussing the > size of the horizontal stabilizer. The talk was of > enlarging the chord > rather > than the span to greatly decrease the possibility of > flutter. Was this > a true > concern or just hangar talk? Jim, When I added 6 inches to each end of my horizontal stab (keeping root and tip chords per plans, but sliding the elevator spar back to maintain stock elevator area) I also went to a REAL airfoil at the tip (and root) rather than the 5/8" square tip. This real airfoil has a thickness of probably 1.75" (it's a long way to the basement) at the tip, but almost 2.75" at the root section. This not only yields a h/s with a real airfoil, but that is also very stiff. Larry French (Lionheart designer) was over here the other day borrowing micro and remarked that I certainly shouldn't have to worry about flutter. There are other factors involved (balancing), but stiffer spars certainly don't hurt. And my logic for going with a thicker section was that there was more lift available (yes, it is symmetric) and thus makes the h/s more effective (another freebie)... Mark Langford, Huntsville, Alabama mailto:langford@hiwaay.net see KR2S N56ML at http://home.hiwaay.net/~langford/kr2s.html ------------------------------ Date: Wed, 8 Jul 1998 06:56:13 -0700 From: "John Bouyea" Subject: KR: Re: Bummer... 1/2 Compu-Fire dead Ross, Electronic ignitions are typically EXTREMELY sensitive to failure if a plug lead are not able to spark the "pulse" through to ground. If a unit operates with a lead removed from the spark plug, it is possible (read easy) to "blow" the unit. How many output coils are there on the Compu-Fire? Is this a possibility? Heck, I paid WAY more $280 to learn about this when I blew the "black box" on my Laverda... See you Saturday morning @ 10. John Bouyea kr2 - on the gear kr2s - building the spars Hillsboro, Oregon - ---------- > From: Ross Youngblood > To: krnet-l@teleport.com > Subject: KR: Bummer... 1/2 Compu-Fire dead > Date: Tuesday, July 07, 1998 11:49 PM > ... > So, I double checked the wiring extension from the distributor to the > unit, and it ohmed out OK, > so unless the pick up is hosed, I have a blown "coil" on the Compu Fire > unit. Bummer Dude! ------------------------------ Date: Wed, 8 Jul 1998 10:18:40 EDT From: JEHayward@aol.com Subject: Re: KR: Stabilizer enlargement In a message dated 7/8/98 4:08:16 AM Mountain Daylight Time, langford@hiwaay.net writes: << I also went to a REAL airfoil at the tip (and root) rather than the 5/8" square tip. This real airfoil has a thickness of probably 1.75" (it's a long way to the basement) at the tip, but almost 2.75" at the root section. This not only yields a h/s with a real airfoil, but that is also very stiff. >> That's almost the same as what I've done. My root is 2" with the tips being two 5/8" pieces laminated for a 1-1/4" tip piece. My airfoil is also symmetrical but no particular thought was given to the percentage or anything. I also extended the chord at the root so the leading edge is even with a small strake on the v/s and has it's own small strakes to match. They are more for looks than anything else I think. The leading edge then tapers from the root out to the tip's normal chord dimension. I have also increased the h/s span 6" total. Thanks for your reply...... Jim Hayward Rapid City, SD ------------------------------ Date: Wed, 08 Jul 1998 07:33:48 -0700 From: Ross Youngblood Subject: Re: KR: Re: Bummer... 1/2 Compu-Fire dead John, There are two output coils on the Compu-Fire. Unless I had a bad spark plug lead, I don't believe I had the leads removed at any time. I have an inductive pick-up light for my timing light, and I never use the "spark test" with a CDI ignition. (Well there was the time with my wifes car, but that was last year). The good news is Great Plains now sells COMPU-FIRE units, for about $249, so I may send Steve some $$$ to get another. Or I might pick one up at Arlington... who knows. - -- Ross John Bouyea wrote: > Ross, > Electronic ignitions are typically EXTREMELY sensitive to failure if a plug > lead are not able to spark the "pulse" through to ground. If a unit > operates with a lead removed from the spark plug, it is possible (read > easy) to "blow" the unit. How many output coils are there on the > Compu-Fire? Is this a possibility? > > Heck, I paid WAY more $280 to learn about this when I blew the "black box" > on my Laverda... > > See you Saturday morning @ 10. > > John Bouyea > kr2 - on the gear > kr2s - building the spars > Hillsboro, Oregon > > ---------- > > From: Ross Youngblood > > To: krnet-l@teleport.com > > Subject: KR: Bummer... 1/2 Compu-Fire dead > > Date: Tuesday, July 07, 1998 11:49 PM > > ... > > So, I double checked the wiring extension from the distributor to the > > unit, and it ohmed out OK, > > so unless the pick up is hosed, I have a blown "coil" on the Compu Fire > > unit. Bummer Dude! ------------------------------ Date: Wed, 8 Jul 1998 11:24:41 -0400 From: "Cary Honeywell" Subject: Re: KR: Crash-Thud! Email (repy) to cary@storm.ca or ve3ev@rac.ca Web page http://www.storm.ca/~cary/ KR2 area http://www.storm.ca/~cary/kr2.shtml - ---------- > From: Harold P 6:33 PM > > Yes, I was flying over and heard Ottawa Terminal say that Rockcliffe was closed. > Until 1300. Thats when they loaded it onto a floatplane dolly and carted it over to his tiedown. Hate to tell the guy, but we had a tornado go through the field about 11 years ago. The Lake amphib that was parked there was rendered unrecognizable in about 5 seconds. Mind you, my 172 is parked where a Stinson was dealt a similar blow. The KR is next to it.. Hmmm! BTW, are you flying the KR2 with trike gear? I saw one in Sherbrook a few years back. Was for sale. Must get you on the landline and chat a bit to get some info on how you find flying the KR. - - Cary - ------------------------------ Date: Wed, 8 Jul 1998 11:35:33 -0400 From: "Cary Honeywell" Subject: KR: Re: Bummer... 1/2 Compu-Fire dead Email (repy) to cary@storm.ca or ve3ev@rac.ca Web page http://www.storm.ca/~cary/ KR2 area http://www.storm.ca/~cary/kr2.shtml - ---------- > From: Ross Youngblood > Well, I'm bummed. > > The good news is this explains why my two cylinders seemed to be running > cold, and why it > was so hard to start. Maybe I can sell the Compu-Fire unit to someone > with a 1/2 VW engine :). > It ran really good with only two cylinders but it's probably not the > best way to begin the break-in > cycle. You could have come to a bad end. A real bummer there. Sorry: I couldn't resist. Perhaps you can shed some light for me on the engine response when checking left then right ignition. I use "Bendix" mags. When I check the left or right mag, the engine shakes like Model 'T' on a cordoroy road. I know my 6 cyl Continental shakes a bit, but thought the Revmaster might have been protesting too much. All CHT and EGT readings are close to each other and well within the green. The rpm's drop about the same for each. Just how much of a St. Vitus dance should I expect? - - Cary - (BTW, great for making milkshakes) ------------------------------ Date: Wed, 8 Jul 1998 12:00:39 -0700 From: rdewees@juno.com Subject: KR: Re: East coast gathering Hi Krnetters... It's good to see the news of the Colombia gathering gaining speed. I plan of flying in on Saturday if the weather is good but will drive up and camp if it doesn't look clear for the return trip. Somewhere I saw a suggestion to bring parts and stuff for trading and byuing that widget you have need for. I think this is a good idea and just wanted to list a few thinkgs I will be seeking for my project in case someone attending might have i. I need a front nosewheel assembly and tire for standard KR2, axles drums, hydraulic brakes and tires for the main gear, tanks for header or sub wings, electric pump for same, King transponder and encoder, 720 channel nav or nav-com, lightweight strobe system parts, landing lamp, and lightweight aero battery with or without case. Also need starter supply of T88 glue and faster two-part epoxy glues. If you have any of this stuff please bring it to the TN gathering or contact me at rdewees@juno.com. PS.. also looking for ideas/parts on split pedal toe brakes/rudder pedal more like my ole Cessna. See you there! Ron DeWees Atlanta, Ga 404 876-3481 _____________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com Or call Juno at (800) 654-JUNO [654-5866] ------------------------------ Date: Wed, 08 Jul 1998 09:08:36 -0700 From: Micheal Mims Subject: Re: KR: Re: Bummer... 1/2 Compu-Fire dead Cary Honeywell wrote: > Perhaps you can shed some light for me on the engine response when checking left then right ignition. I use "Bendix" mags. When I check the left or right mag, the engine shakes like Model 'T' on a cordoroy road. >>> I get to fly a Revmaster powered Dragonfly now and then and it doesnt shake at all on one mag. The RPM just drops a bit. This engine has the dual mag, one drive setup that is standard on most R2100s. If yours is shaking that bad something could be wrong. - -- zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz Micheal Mims SP290,.. Filling and sanding now! mailto:mikemims@pacbell.net http://www.geocities.com/CapeCanaveral/Hangar/4136/ Irvine Ca Fax 949.856.9417 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------------------ Date: Wed, 8 Jul 1998 11:32:42 -0500 (CDT) From: Steven A Eberhart Subject: KR: The Wind TUnnel test results THe following message was just received from Ashok. He has the wind tunnel test results for the new AS5045 and AS5048 on his web page. We all owe Ashok a lot for all of his efforts in helping to take the KR into the 21st Century. Thanks Ashok, we look forward to a lot of planes flying around with your airfoils. Steve Eberhart - ---------- Forwarded message ---------- Hi folks, It is finally ready! http://amber.aae.uiuc.edu/~ashok/kr2/airfoils/tests/ I do appreciate your patience. Thanks, Ashok ------------------------------ Date: Wed, 08 Jul 1998 11:27:49 -0600 From: Adrian Carter Subject: Re: KR: Bummer... 1/2 Compu-Fire dead Hi Ross and KRnetters, On your ignition system, check all you HT leads or you can use the plugs by removing each one and letting them lie on the heads and see if you get a spark. Make sure there is no fuel around. If no response with spark try and get your coil with HT leads bench tested rather than buying a whole new set. It's a lot of bucks - this can be a learning process which is invaluabel in itself. Good Luck!!!!! - -- Adrian VE6AFY Mailto:cartera@cuug.ab.ca http://www.cuug.ab.ca/~cartera ------------------------------ Date: Wed, 08 Jul 1998 13:48:36 -0400 From: Tom Andersen Subject: Re: KR: Stabilizer enlargement/washout Mike, What I like about the strakes is that they produce very little bending moment on the stab spars. Adding span to the stab adds many times more force compared to an equivalent amount on root ribs and strakes. Having an airfoil at the stabilizer tips is useful, but the amount of lift it would generate is miniscule compared to the phugoid dampening that the extra area provides. For this reason, the extra lift and frontal area and drag of thick stab tips is not worth it to me, but more area is very important. The thick stab tips do provide additional stiffness out there, and this is probably the most beneficial aspect when considering adding to the stab tips behind the rear stab spar. The KR-2S cannot be flown hands off. Some guys say its the small size of the plane, but my experience in modeling tells me otherwise. I can build a pattern plane that is ten times as stable as any other model of the same size. The decalage, airfoil type, and balance interact and affect the trim and stability. The wing produces pitch moments with changes in lift, so the more area you have out back to dampen that, the more stable you'll be. The KR-2S could use another 14inches longer at the tail, and it would not look weird. The RAF 48 is a semi-symmetrical airfoil. Not flat-bottomed, but still producing pitch forces similar. Take that airfoil, add 3.5 degrees incidence, and 3 degrees washout, and you have all kinds of crazy opposing pitch forces at full throttle. I'm considering .5 degrees incidence, no washout, stall strips to induce the stall at the center section. That'll increase the longitudinal stability even more. I must say that 15 years of R/C modeling is proving to be 15 years of miniature simulators, because the knowledge of aerodynamics transfers over almost completely, even though the models fly at different Reynolds numbers, the basic principles remain the same. - -Tom Micheal Mims wrote: > At 10:12 PM 7/7/98 -0400, you wrote: > I'm going with 8" increased span(total), a longer nose rib, and great big > strakes. http://home.att.net/~tomkr2s/index.htm >>> > > Man those top view shots of the KR2S really show what wrong eh? Just look > at that picture on the left! Your headed in the right direction Tom. > > FYI While I was running the data for a stock KR2S through the spreadsheets > from Roncz I found the horizontal tail needed to be 2.5 square feet larger > at a minimum. Mine is right at 2.5 square feet larger and like you, I may > install strakes to add a few more. > zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz > Micheal Mims > SP290,.. Filling and sanding now! > mailto:mikemims@pacbell.net > http://www.geocities.com/CapeCanaveral/Hangar/4136/ > Irvine Ca > Fax 949.856.9417 > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------------------ Date: Wed, 08 Jul 1998 13:54:05 -0400 From: Tom Andersen Subject: Re: KR: Compu-Fire Sites Ross, Does Compu-fire make a dizzy for the Soob EA-81? I could go for a lower-profile unit for my DDTS. - -Tom Ross Youngblood wrote: > I discovered Steve Bennetts New GPASC site http://www.greatplainsas.com > while > looking for Compu-Fire on the net. Nifty Site! Check it out if like > me... you haven't > been looking at engine stuff for a while. > > COMPU-FIRE has a website at http://www.compufire.com, but it's currently > under > construction... > > -- Regards > Ross ------------------------------ End of krnet-l-digest V2 #112 *****************************