I agree with Ed and Bill. I've been there-- climbing out of Scott City on the way home at 70 MPH indicated, and suddenly breaking off into a stall. Your ASI is indicating higher than actual airspeed. Try some stalls above 3000' AGL and see what you get, then compare that to the charted stall speeds for your weight and model. Then if you still have doubts, follow Ed's recommendation on calibrating the ASI with the GPS. After you determine that the ASI is the problem, you and your A&P should start checking your pitot-static system. My guess is that you have a static leak or blockage in the line to the ASI. Check the line into the back and the B-nut for the static input, then work backwards from there. Finally, if your pitot-static system is tight, it's probably the ASI.
Hartmut and I are convinced that many Ercoupes are being flown with erroneous airspeed indications due to pitot-static system problems. His was indicating unusually low due to a pitot leak, and mine was due to a bent static line at the B-nut in the back of the instrument. I had one guy tell me it didn't matter because he flies his airplane "kinetically", which is a technical-sounding euphemism for "by the seat of this pants". Aviation moved on from the era of "seat of the pants" flying after World War I. We fly "by the numbers" now, and if you aren't setting yourself up for a potential loss of control, you could be setting up someone else if they fly your airplane. Makes me wonder about the pitot-static system in the Sebring mishap aircraft... Dave English ATP, CFII, MEI --- In [email protected], "Jerry Ward" <mag45to...@...> wrote: > > You guys all keep talking about landing your coupe at such slow speeds - I > have a metal wing G-model and I have trouble getting it to land under 75mph. > I sure am jealous of all of you that can land slow. If I were to try that I > would break my landing gear off. It starts to fall out of the sky about > 72mph.. And I do mean fall fast. Jerry in the Great Northwest. > > > ----- Original Message ----- > From: Ed Burkhead > To: ety > Sent: Sunday, March 14, 2010 7:45 PM > Subject: FW: [ercoupe-tech] Kim's Ercoupe > > > > > > > Maybe this is more readable: > > > > As I said a couple of days ago, this gave these results: > > > > 13¢ª up travel 48-52 mph landing speed > > 415-C and 415-CD > > > > > > 9¢ª up travel 55-60 mph landing speed > > > > 415-D and on earlier models > > with 9¢ª elevator limitation due > > to using the 1320 pound STC > > > > > > 20¢ª up travel 48-52 mph landing speed > > > > 415-E and all later models AND > > earlier models with split elevator > > installed via STC or field approval > > on a form 337 >
