Yes Ed, I know, and I told him. I really don't know why it is like that. I will measure the up travel as soon as I can just to see how much it moves upwards. I'm just telling you what he told me, but I did not measure that.
Serial number is 4849 (Model 415-CD). Thanks ! Daniel ________________________________ From: Ed Burkhead <[email protected]> To: Daniel Arditi <[email protected]> Sent: Tuesday, April 21, 2009 4:44:49 PM Subject: RE: [ercoupe-tech] RPM Drop during Climb Out Daniel, If the elevator up travel on an Ercoupe or Aircoupe isn’t correctly restricted, the plane is illegal to fly. It is also unsafe to fly. If the elevator does not have the up travel limits, the aircraft can stall and may not be able to recover. The airfoil used on Coupes is efficient but it has bad stall behavior. It is only safe on a Coupe because of the elevator up travel limits which prevent a normal stall. The 415-C and 415-CD should have the limiter set to 13° up travel unless you have the 1320 lb. gross weight STC in which case the limit must be at 9° up travel. The 415-D must be set to 9° up travel. Any model after the “D” will have the “split” elevator (the elevator with the cut out section in the middle). Some C, CD and D models may have been upgraded to have this elevator. It should be set to allow 20° of up travel (and gives about the same elevator effect as the 415-C and CD have with 13° up travel, but with increased saf ety ). You haven’t yet told us what model and serial number your friend’s plane has. That would help us help you. Ed ________________________________ From:[email protected] [mailto:[email protected]] On Behalf Of Daniel Arditi Sent: Tuesday, April 21, 2009 1:45 PM To: [email protected] Subject: Re: [ercoupe-tech] RPM Drop during Climb Out Yes Ed, I agree with you. One thing I told to my friend is that I don´t like the idea of not having the limit in the upward elevator travel. This can allow the coupe to climb too steep, when in combination with the the C90 engine power and low weight (fabric covered wings, not metal covered). Thanks again for all the help and advice. Next time, when everything seem to be OK, I would suggest my friend not to climb so steep, at least at take of. Daniel ________________________________ From:Ed Burkhead <[email protected]> To: Daniel Arditi <[email protected]>; ety <[email protected]> Sent: Tuesday, April 21, 2009 2:54:23 PM Subject: RE: [ercoupe-tech] RPM Drop during Climb Out Daniel, As far as fuel feed to the engine during extremely steep climbs, one could say that there’s no “limit” on how steep a climb a Coupe can safely do. If you try to go too steep, the fuel won’t feed, the engine will lose power, the nose will drop and the engine will immediately regain power. That’s pretty safe unless you’re trying desperately to climb over trees or a mountain ridge.. There is a physical fuel-flow limit on how steeply the Coupe can climb, though, and it’s so steep it’s very rare to encounter it. Normally, your best climb just won’t be steep enough to have this problem as long as your elevator up travel is rigged the way it’s supposed to be and the center of gravity is within the allowed limits. Come to think of it, perhaps you should double-check those items. I would avoid any flying situations that forced me to need that steep of a climb. Ed
