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Old Dec 18, 2012, 05:31 PM
AndyKunz's Avatar
Illinois
Joined Sep 2001
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They are Prandtl tubes. Google will drive you crazy with all the information reading up on them.

Andy
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Old Dec 18, 2012, 05:52 PM
Flying Full Size & Fun Size :)
jgalexander's Avatar
United States, CA, Calabasas
Joined Apr 2010
1,952 Posts
Hi Andy,
How do they come stock from the factory? These both were part of two Spektrum Airspeed Telemetry systems I bought used, but I haven't been able to see a close enough picture to see which one is more stock. Thoughts?
Josh
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Old Dec 18, 2012, 06:29 PM
AndyKunz's Avatar
Illinois
Joined Sep 2001
23,651 Posts
The ones on my planes are all squared off, the chamfer is much less than the rounded one you show.

As for "better" you can do lots of googling and come up with different results. Gotta love the Internet!

Mine all report reasonable numbers (ie, in still air they match ground speed +/- a few MPH at full throttle).

Andy
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Old Dec 18, 2012, 06:38 PM
Flying Full Size & Fun Size :)
jgalexander's Avatar
United States, CA, Calabasas
Joined Apr 2010
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Google I did
I imagine both would work just fine - I'll stick with the square one since it's workin for you..
Thanks again,
J
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