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| Subject: Stall Speed | |
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Author: BobP |
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Date Posted: Sat, Aug 08 2015, 11:48:53 GMT In reply to: Doug Buhr 's message, "Pulsar 3 normal stall speed?" on Wed, Jul 15 2015, 0:13:15 GMT Most Likely and ASI problem. It is possible to check your ASI in the kitchen at home by connecting a clear tube to the Pitot side with water in the bottom of a U bend in the tube (make sure you don't get water into the ASI itself). There are charts and formula if you do a google search that give the indicated pitot pressure airspeed for a given water column height (the difference in water level on opposite sides of the U bend). You can use this technique to check accuracy over the entire ASI range. If you ASI is accurate then I'd look at the static port on your aircraft to see if that is causing the misreading. On my aircraft I fitted a second static port on the opposite side of the fuselage (MK1 Pulsar) so that indicated airspeed would not be affected so much by side slipping. You can also easily check the accuracy of your ASI in the air by flying directly into wind and then directly down wind (the direction the clouds are going if different from the wind sock) at a constant ASI and comparing the ASI speed with GPS speed. The ASI speed should the average of the upwind and downwind GPS airspeeds. If your ASI is inaccurate you can just put a sticker on the ASI glass showing the full flap approach speed. The Pulsar is so slippy that if the approach is too fast its difficult to lose the energy in time to land on short strips. [ Next Thread | Previous Thread | Next Message | Previous Message ] |