Bill:
If closing the canopy affects the airspeed indicator (without affecting the airspeed, of course,) then you have a leak between one of the pitot or static systems into the cabin. The static system me be simply vented into the cabin, but it shouldn't be. Should take less than a year to correct. John Cooper Skyport Services 4996 Delaware Tnpk Rensselaerville, NY 12147 518 797-3064 www.skyportservices.net _____ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of billjhs Sent: Wednesday, May 07, 2008 4:09 PM To: [email protected] Subject: [ercoupe-tech] Aurhspeed! I have the exact problem with my coupe. My mechanic hasn't been able to fix it yet!! and thats 1 year!!! I do notice that it gets better (5 mph) when I fly with the canopy closed. Hope you find the answer, I just fly it by "feel" and was taught to fly it that way by my CFI. Bill N2367H Thanks to everyong for all the good information. Checking me AherSpeed" that's why I'm here. When we bought the plane and flew it home, we were impressed by the cruise airspeed showing 105 to 110 mph. We flew loose formation with a Cessna 175 that we took to get the plane; he was showing 80mph with one notch of flaps just to rub it in. We've all noticed that if you fly the correct indicated airspeeds it gets too slow and drops in, so we've been adding about 10 mph. We installed a GPS in the panel, flew each cardinal heading at 100mph indicated, GPS four way average was 88 mph (77 knots). So we are looking for about 12 mph extra. I suspect the static system has a problem, probably beyond the "calibration ring". We'll look at it tonight. We set out last evening to check out the static system and got side tracked with the pitot ring thing, and a student preparing for a checkride. mitch - 99325
