REFLECTOR: TAS calibration?

[Scott Baker]

I would assume that you are factoring altitude and temperature when calculating TAS. If so, airspeed error might be related to a pressurization of the static system (a common problem in Velocity aircraft that have their static port located forward of the entry door).

Scott Baker

On Sep 28, 2013, at 8:29 PM, Geoff Gerhardt <geoff.gerhardt at gmail.com> wrote:

> Guys,
> 
> Flying today I realized that my ground speed seems to be always greater than my TAS.  I figured at least some of the time it should be less (i.e. into a headwind).  But it always seemed to be greater.  So, today, I flew in a box, E, W, N, S and recorded my TAS and GS.  My TAS was constant at 159ktas on each leg, and my GS (GPS) was 185, 179, 171, 175 for the W, N, E, S legs.  If I add all those up and divide by four, I get 177.5kts, yet my TAS registered 158ktas.  Am I missing something?  Is my airspeed indicator reading too low?
> 
> Thanks.
> 
> Geoff
> 
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