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Old Aug 26, 2009, 12:53 AM
Registered User
Australia, VIC, Melbourne
Joined May 2009
373 Posts
Question
Eagletree Airspeed and altimeter on Heli?

Has anyone used them with the T-fitting on their helicopter? I have them on the way from eagletree but unsure how to mount them for maximum precision. I plan to use it on a Trex 500.

thanks in advance
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Last edited by AeroM'ck'y; Sep 01, 2009 at 12:27 AM.
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Old Sep 10, 2009, 03:48 AM
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Australia, VIC, Melbourne
Joined May 2009
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I take it no one has done it yet? just wanna post up my findings with using the pitot tube on a heli. it's pretty much useless unless i want to know what kinda wind there is while i'm hovering facing the wind. as soon as i tilt for forward speed i lose the reading. i might position the tube so that it's pointing straight ahead when i'm in forward flight. i might use the gps for speed but still prefer barometric for altitude.
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Old Sep 10, 2009, 10:52 PM
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Danal Estes's Avatar
Frisco, TX, USA
Joined Sep 2001
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I have an altitude sensor only. At the moment, it is on a side frame, well clear of the canopy. Tube is pointed forward.

It doesn't seem very accurate, reading negative a lot, etc, etc.

I have not attempted to provide a better "static" pressure arrangement. That would probably help. I'll try soon, and report back.
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Old Sep 13, 2009, 09:13 PM
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Australia, VIC, Melbourne
Joined May 2009
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how did you go? i'm not getting accurate readings having it on the side. i see photos of real helicopter and they have their pitot tube right at the front of the nose. Does our pito tube works the same as real helicopters?
here's a video of the flight, compare to gps spd at the bottom of the screen.
Obviously the gps altitude isn't right there +1 for the barometric alt sensor.


Trex 500 Helicopter FPV with Telemetry at winton drift practice (5 min 24 sec)
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Last edited by AeroM'ck'y; Sep 13, 2009 at 09:30 PM.
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Old Sep 13, 2009, 09:17 PM
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Australia, VIC, Melbourne
Joined May 2009
373 Posts
pic of the pitot tube

this is where the pitot tube was when i did that video, between the landing skids and the canopy
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