In case there is someone out there that doesn't have a gps unit but does have an iphone. There is a speedometer app for the iphone (free). Dan C
On Mar 15, 2010, at 8:26 AM, [email protected] wrote: > 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 > > > >
