You are pretty correct. They thought the structure was fine for 1400 lb. gross. The CAA, being cautious, had limited them to 1260 partly because of the spinproof certification.
It was just during testing for the 1400 lb. gross weight, they found that the max power, full up elevator aerodynamics weren't stable enough so they limited the up travel on the D model to 9 degrees to avoid the problem. My D flies and lands just fine, thank you. Some day I'll get a split elevator for it though. [EMAIL PROTECTED] wrote: > > I may be wrong, but I was led to believe that the reason for the > increased gross weight of the 415-D was due to the further limiting of > up-elevator motion therefore allowing for similar "no-stall" > characteristics with higher gross weight. Then with the split elevator E's > and later, the elevator-up motion was restored w/o compromising the higher > gross weight. This was done to return elevator effectiveness at > landing-flare time. I've been told that you have to land the D model a > little faster because the limited elevator up(9 deg) does not provide good > flare assertion at lower speeds like the original C(13 deg) does. This is > the way I understood it. As far as the rear spar reinforcement, I was led > to believe that this was a mandatory AD or something. My project 415-CD > has the rear-spar reinforcment done and I was sold a bunch of > New-Old-Stock reinforcement parts(Z shaped alumunum piece, if I'm > remembering correctly). I've only been gathering 'coupe knowledge for > about 8 mo. now, but through this list and by reading the ADs and other > literature I feel that I'm ramping up quickly. I hope my knowledge of the > above subject is accurate. If not, please inform. > > Doug Stierman > 415-CD > N3957 - engine > > > > > I'm no expert on this either. However, the serial number 2868 Ercoupe > > is also covered under Aircraft Specification A-787 with NO conversion > > required to the wing to get the gross weight up to 1400 lb. > > > > This probably won't help you on you Forney F-1A with gross weight of > > 1450 lb. but it seems to me it should be all that is needed for a Forney > > F1. The F1 shares the same gross weight (1400 lb.) with the 415-D > > listed in A-787 for those serial number wings. > > > > Even considering all that, if there was a wing strengthening after s/n > > 2868 you would want it on your Forney. And who knows what the FAA would > > think about anything? Certainly not me. > > > > Just wanted to mention the type certificate information in case that > > could help you or someone else lurking here. > > > > I think that the MOST VALUABLE PUBLICATION A COUPER COULD OWN IS > > UNIVAIR'S "ESS" "Specifications, A.D. notes, S.T.C.s". I think that if > > you can point to supporting words in the type certificate "aircraft > > specification" you are 80% of the way to anywhere. > > > > -- > > Ed Burkhead > > Peoria, Ill. > > Ercoupe N3802H, 415-D > > > > > > [EMAIL PROTECTED] wrote: > > > > > > Ed and list: > > > I am no expert regarding all this. Obviously if I were, I wouldn't be in > > > this mess in the first place. The wings came from s/n 2868 certified under > > > A-718. The Forney is s/n 5745 certified under A-787. Somewhere my IA found > > > that one of the major differences was the wing. You are correct, the C is > > > 1260 lbs and the F1-A is 1450. > > > Dick > > > -----Original Message----- > > > From: Ed Burkhead <[EMAIL PROTECTED]> > > > To: [EMAIL PROTECTED] <[EMAIL PROTECTED]> > > > Date: Tuesday, February 01, 2000 4:43 AM > > > Subject: Re: [COUPERS-TECH] Rag Wings - The Rest of The Story > > > > > > I think you'll find that those wings are from an aircraft eligible in > > > Aircraft Specification A-787.... > > > > > > --------------------------------- > > > > --------------------------------- > > to unsubscribe send mailto:[EMAIL PROTECTED] > > > > ______________________________________________ > > Faster, stronger and able to send millions > > of emails in one click: the new Topica site! > > http://www.topica.com/t/14 > > > > --------------------------------- > to unsubscribe send mailto:[EMAIL PROTECTED] > > ______________________________________________ > Faster, stronger and able to send millions > of emails in one click: the new Topica site! > http://www.topica.com/t/14 -- Ed Burkhead Peoria, Ill. Ercoupe N3802H, 415-D --------------------------------- to unsubscribe send mailto:[EMAIL PROTECTED] ______________________________________________ Faster, stronger and able to send millions of emails in one click: the new Topica site! http://www.topica.com/t/14
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