FXfan
Topic Author
Posts: 83
Joined: Tue Oct 24, 2006 6:40 am

Airspeed Indication On Rotocraft?

Tue Jan 22, 2008 12:36 am

How do rotocraft measure airspeed when they have the ability to move side to side and even backward? Also, does the down wash effect the indicated speed at all?
 
star_world
Posts: 943
Joined: Mon Jun 25, 2001 7:52 am

RE: Airspeed Indication On Rotocraft?

Tue Jan 22, 2008 1:39 am

The pitot tube is placed out of the rotor effect area, so the reading will be accurate. The ASI works just like a fixed wing aircraft ASI would - it only shows forward speed. The sideways / backwards movement is generally performed at a much lower speed, so having an airspeed for these directions isn't essential. Plus there's always a GPS groundspeed indicator, if fitted.

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