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 HELP PLEASE

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Old 02-12-2009, 04:26 PM
  #1  
cavandish
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Default DOPPLER HELP PLEASE

This is a link to my Jett 90 powered G/P revolver, sorry you can't see the plane, but there is a very good sound track of a flypast.
could sombody please run a doppler programe on it, and give me a speed ?
thanks
John
Christchurch NZ
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Old 02-12-2009, 05:39 PM
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Mike Connor
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Default RE: DOPPLER HELP PLEASE


ORIGINAL: cavandish
... sorry you can't see the plane,...
You can also not see the link.
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Old 02-12-2009, 05:44 PM
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cavandish
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Default RE: DOPPLER HELP PLEASE


oops

http://www.youtube.com/watch?v=7bLld7IwGkQ
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Old 02-12-2009, 06:14 PM
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Mike Connor
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Default RE: DOPPLER HELP PLEASE

I will call it 209 km/h or 130 mph.
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Old 02-12-2009, 11:12 PM
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Default RE: DOPPLER HELP PLEASE

You didn't mention the air temperature. Figuring 61 deg F I get 133 MPH
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Old 02-13-2009, 12:13 AM
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Mike Connor
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Default RE: DOPPLER HELP PLEASE


ORIGINAL: still4given

You didn't mention the air temperature. Figuring 61 deg F I get 133 MPH
We are a lot closer this time.
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Old 02-13-2009, 01:07 AM
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cavandish
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Default RE: DOPPLER HELP PLEASE

thanks guy's
a bit dissapointing, Ive had 148 on my gps, and felt sure she was running sweeter this time.
I would guess air temp to be around 70
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Old 02-13-2009, 07:34 PM
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ORIGINAL: cavandish

thanks guy's
a bit dissapointing, Ive had 148 on my gps, and felt sure she was running sweeter this time.
I would guess air temp to be around 70
The 148 may have been a high power decent with a tail wind. Or does your gps record the whole flight?
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Old 02-13-2009, 07:43 PM
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Default RE: DOPPLER HELP PLEASE

gps records the whole flight,and gives a top speed, but I have always assumed that it was 'one dimentional', Ie records speed parralel to the ground, negating the higher speed achieved during a dive.
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Old 02-13-2009, 09:51 PM
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Default RE: DOPPLER HELP PLEASE

I see 134 at 70 degrees.
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Old 02-14-2009, 12:32 AM
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Default RE: DOPPLER HELP PLEASE


ORIGINAL: cavandish

gps records the whole flight,and gives a top speed, but I have always assumed that it was 'one dimentional', Ie records speed parralel to the ground, negating the higher speed achieved during a dive.
I would guess that somewhere between a 30 and 45 degree dive, the ground speed would start to diminish. But I feel certain a shallow dive would increase the ground speed. Add a little tail wind and you could get 148.
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Old 02-14-2009, 12:55 AM
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Default RE: DOPPLER HELP PLEASE

I would think the the fastest ground speed would be at the bottom of a dive when you first level out, especially going down wind. The plane should not have slowed much from what it was doing in the dive.

I checked this in waveOscope as well I get a little different result.
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Old 02-14-2009, 01:33 AM
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ORIGINAL: still4given
I checked this in waveOscope as well I get a little different result.
I used WaveOScope and never got anything that high. It is hard when you have to use the lines so far to the left. Where did you get the English version of the program?
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Old 02-15-2009, 12:07 AM
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Default RE: DOPPLER HELP PLEASE

I don't usually use the ones that far left but they were by far the most distinct. I can't remember where I got the English version. Someone put up a link one time and I downloaded it. If I can find it I wll put up the link.
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Old 02-16-2009, 07:38 AM
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Default RE: DOPPLER HELP PLEASE

English Version can be found at this link guys.....

http://happykillmore.com/main_downloads.asp

Either zip file or WAVEoSCOPE.exe will do..... Gofastz
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Old 02-16-2009, 10:55 AM
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Default RE: DOPPLER HELP PLEASE

Got it. Thanks
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Old 02-16-2009, 06:32 PM
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Default RE: DOPPLER HELP PLEASE

What prop are you running ?
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Old 02-16-2009, 09:19 PM
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Default RE: DOPPLER HELP PLEASE

11x8 apc
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