Dave is right. 70 MPH off is just too much for even the worst ASI. Also your description of the sluggish performance suggests a leak in the static system.
Hartmut From: [email protected] Sent: Monday, June 07, 2010 10:59 PM To: [email protected] Subject: [ercoupe-tech] Re: airspeed indicator Before spending several hundred dollars on an ASI, I would invest in a leakdown check. I think there are more owners with leaky pitot or static systems than bad ASI's out there. You could have a cracked line, especially if you just rebuilt the airplane. --- In [email protected], "jayschubox" <jayschu...@...> wrote: > > I have just test flown my '65 Alon after rebuilding from damage sustained in > 2001. My airspeed indicator is very slow to start indicating and continues to > lag after climb out. On final the indication drops away quickly to near zero > while my gps gives a ground speed of 70mph. I have tries adjusting the pitot > tube, but seems to give no results. Fittings are all tight and dont appear to > leak. My guess is that my airspeed ind. probably needs to be replaced. Anyone > else have a similar experience? Suggestions? Thanks. Jay >
