Ed,
No aluminum thickness information was written in the 337 used
for the STC conversion. Logbook entries unfortunately didn't reveal much.
Interestingly I've noticed, the weight and balance changes in 1962 were
made from prior calculated numbers, then when compared to the actual
aircraft weight scale readings after the conversion. Conversion weight
matches the same weight for item 601 of Aircraft Specification 718. Must
be dumb luck. I'm guessing the instructions and drawings used were lost
over time. Hopefully someone out there may have copies of them to share
information like that with us because those are good questions. I'm also curious to know what rivet patterns were used for the different conversions out there, three inch on center patterns or two and a half, or less? I can see using more rivets can add the pounds too. Walt Uebele 1946 415-C N94113 _____ From: Ed Burkhead [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 05, 2005 9:53 PM To: Walt Uebele; Coupe-Tech Subject: RE: [COUPERS-TECH] Wing Weights Walt, Was that 32 lb. difference actually measured or calculated? Did you use the same thickness of aluminum as the other conversions? -----Original Message----- From: Walt Uebele [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 05, 2005 11:51 PM To: 'Bill McNeeley'; 'Coupers Tech' Subject: RE: [COUPERS-TECH] Wing Weights Bill, My 415-C fabric covered wings were modified by STC to all metal in 1962 using drawings and instruction #103000 from Birtcraft Engineering Company. Added 32 pounds to the empty weight. Walt Uebele 1946 415-C N94113 _____ From: Bill McNeeley [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 05, 2005 9:47 PM To: [email protected] Subject: [COUPERS-TECH] Wing Weights ----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- My partner and are looking to buy an SLA qualified Ercoupe. Useful load is important consideration. Can anyone tell me the difference in weight between fabric and metal Ercoupe wings. ========================================================================== ==== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/
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