Jerry--
You have a leak in your static system. That's the only way the
airspeed indicator will read higher with the canopy open. Once I was
having a transponer and encoder put into my Coupe at an avionics shop
and had to depart due to threat of bad weather before they were
completely done. When I left I opened up the canopy which gave me an
instantanious 40 mph(!) increase in airspeed. I called them after I got
home and they said they left the static tube disconnected, but would
connect it when I returned. I told them about the airspeed and they
said it would only do that if my cockpit leaked. I said yes, it really
leaks whenever I fly with the canopy open. They didn't know people did
that. Syd Cohen NC94196
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