From: krnet-bounces@mylist.net To: John Bouyea Subject: KRnet Digest, Vol 347, Issue 66 Date: 2/10/2005 8:58:52 PM Send KRnet mailing list submissions to krnet@mylist.net To subscribe or unsubscribe via the World Wide Web, visit http://mylist.net/listinfo/krnet or, via email, send a message with subject or body 'help' to krnet-request@mylist.net You can reach the person managing the list at krnet-owner@mylist.net When replying, please edit your Subject line so it is more specific than "Re: Contents of KRnet digest..." Today's Topics: 1. C-GDPU has finally become a airplane today. (Al Hawkins) 2. Re: Non-zero spar loads was Question on bent spars (Matthew Elder) 3. Re: C-GDPU has finally become a airplane today. (Scott Cable) 4. Re: C-GDPU has finally become a airplane today. (Dan Heath) 5. Re: vw reliability (Rich Seifert) 6. Non-zero spar loads was Question on bent spars (Kevin Jarvis) ---------------------------------------------------------------------- Message: 1 Date: Thu, 10 Feb 2005 17:08:52 -0800 From: "Al Hawkins" Subject: KR> C-GDPU has finally become a airplane today. To: "'KRnet'" Message-ID: <001801c50fd6$422b9e60$6702a8c0@mycomputer> Content-Type: text/plain; charset="us-ascii" I started building my KR2 in 1986, and it finally left the earth today. The airport is at sea level and there was no wind. The test pilot flew it for .9 hrs, circling the airport. The plane hit a top speed of 130 mph at 3200 rpm, climbed 1000'/min at 70 knots, and stalled at 45 knots. The plane flew hands off, but not enough nose up trim, will need to adjust the MAC servo push rod. The engine is a 1835 VW with a super posa carb, the empty weight is 610 lbs. There were a few problems the engine apparently was cutting out at times, I think the posa is the cause. The static RPM is a little low considering it is a 52x44 prop, possibly mixture to rich. The transponder died after 15 minutes, possibly the fuse. Alastair Hawkins Port Coquitlam B.C. ------------------------------ Message: 2 Date: Thu, 10 Feb 2005 17:18:01 -0800 (PST) From: Matthew Elder Subject: Re: KR> Non-zero spar loads was Question on bent spars To: KRnet Message-ID: <20050211011802.14683.qmail@web30203.mail.mud.yahoo.com> Content-Type: text/plain; charset=us-ascii Naw.. Orma's math was correct.. I think you were thinking of 1.5g's. 1.5 x 200 = 300... 0.5 x 200 = 100... or do I need to take math 101 again. But screw the landing... What about the in-flight forces :-) Drop the skid plate and grab a parachute! Not really the way I would want to egress.. Matt > you posted: > > "I believe it would be wise to put the seats on the > spars, if at all > possible." > > I think that Mark is being kind to use the word > "wise". Seems to me that > a 1/2 g drop as in a hard landing would place a > sudden 100 pound load > (assuming a 200 pound pilot) on the floor/side wall > structure. The pilot > might find his bottom sliding along the runway. > During construction I > That math is incorrect, there is already 1g on the seat/floor/side > wall structure, i.e.., 200 lb in your example. A 1/2 g > landing would result > in a 300 lb force on the seat/floor/side wall > structure. > > Now make that 3 g's like a normal hard landing and I > think you would > want one of those pairs of steel skid pants like the > guys use at the > Circus to make the fire slide. > > Kevin > > > > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to > KRnet-leave@mylist.net > please see other KRnet info at > http://www.krnet.org/info.html > ===== ------------------------------------------------- Matthew Elder Orangeburg, SC http://www.infinigral.com/melder My Airplane Project: http://kr1.infinigral.com ------------------------------ Message: 3 Date: Thu, 10 Feb 2005 17:25:44 -0800 (PST) From: Scott Cable Subject: Re: KR> C-GDPU has finally become a airplane today. To: KRnet Message-ID: <20050211012544.37820.qmail@web53009.mail.yahoo.com> Content-Type: text/plain; charset=us-ascii Al, Congratulations! You now have the priviledge of moving your project from "under construction" to "flying". I bet a tear or two of joy was shed when she took flight... Al Hawkins wrote: I started building my KR2 in 1986, and it finally left the earth today. Scott Cable KR-2S # 735 Wright City, MO s2cable1@yahoo.com __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------------ Message: 4 Date: Thu, 10 Feb 2005 21:24:49 -0500 (Eastern Standard Time) From: "Dan Heath" Subject: Re: KR> C-GDPU has finally become a airplane today. To: "krnet@mylist.net" Message-ID: <420C1771.000001.04016@DANHOMECOMPUTER> Content-Type: Text/Plain; charset="iso-8859-1" Congratulations. I love those flight reports. It really is "a time for FLYING". See N64KR at http://KR-Builder.org - Then click on the pics There is a time for building and a time for FLYING and the time for building has expired. Daniel R. Heath - Columbia, SC See you in Mt. Vernon - 2005 - KR Gathering ------------------------------ Message: 5 Date: Thu, 10 Feb 2005 19:32:45 -0800 From: "Rich Seifert" Subject: Re: KR> vw reliability To: "KRnet" Message-ID: <02b201c50fea$59d89fe0$6501a8c0@richard> Content-Type: text/plain; charset="iso-8859-1" Unfortunately it all depends... 2180cc VW's are as reliable as any engine; however the biggest factor in their reliability is the knowledge and skill of the mechanic. I have a turbo 2180 with 550 hr's on the bottom end and it still carries 55 psi oil pressure. The engine is on its third set of barrels and first set of heads. Turbos are hard on valve seats and prone to cylinder warpage if cooled to quickly. I believe if I had stayed with normally asperated, the top end would have held up much better. I picked up a lot of secrets to building up a good VW from RIMCO in Santa Ana, CA. Anyone into hi-performance VW's will vouch for them. Rich Seifert N56SR ----- Original Message ----- From: "Ivan & Ilse Miller" To: Sent: Wednesday, February 09, 2005 10:58 AM Subject: KR> vw reliability Hi All Can some one tell me how reliable the 2180 VW engine is and what the avarage TBO is? What is the highest engine time on the VW2180 that is known to this list? Thanks Ivan Miller millerai@lantic.net ------------------------------ Message: 6 Date: Thu, 10 Feb 2005 23:38:11 -0500 From: Kevin Jarvis Subject: KR> Non-zero spar loads was Question on bent spars To: krnet@mylist.net Message-ID: <420C36B3.8020108@comcast.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Matt said: Naw.. Orma's math was correct.. I think you were thinking of 1.5g's. 1.5 x 200 = 300... 0.5 x 200 = 100... or do I need to take math 101 again. But screw the landing... What about the in-flight forces :-) Drop the skid plate and grab a parachute! Not really the way I would want to egress.. Matt No, the math is wrong. The airplane is already at 1g. To make a 1/2 g landing would be to not land by 1/2. Yes, you read that correctly, a 1/2g landing would not be a bounce, it would be a non-bounce, a non-landing, a non-event. The g meter says 1 at straight and level and anyway, the pilots weight is already on the seat, any hard landing only adds more weight. Kevin ------------------------------ _______________________________________________ See KRnet list details at http://www.krnet.org/instructions.html End of KRnet Digest, Vol 347, Issue 66 ************************************** ================================== ABC Amber Outlook Converter v4.20 Trial version ==================================