Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Doppler speed test?

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Old 06-13-2011, 07:28 AM
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CrashPro
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Default Doppler speed test?

Hi guys

Can one of you guys with the doppler program see if you can get a reading off this audio please?
Plane is a Hangar 9 Jackal Jett 56LX turning an APC 9-8 prop....wind out of the north 5mph (headwind) [link=http://www.cvrcclubvideos.us/SDVids/SpeedTest.wmv]Video[/link]
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Old 06-13-2011, 10:46 AM
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nitroairplane
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Default RE: Doppler speed test?

There is actually a speedometer app for the Iphone that uses the doppler effect to calculate the speed of your plane I downloaded it yesterday but have not yet had the chance to test it.Unfortunatly it didnt work for the video so i hope it will work in real life.
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Old 07-03-2011, 12:35 PM
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Default RE: Doppler speed test?

Managed to get two readings(a big source of error is the air-temperature, I set it at 90F.)
At 0:22 I got 111,4MPH and 84MPH at 1:03.

Don't know how reliable it is. Would have guessed that a jackal with that setup would be faster.
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