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

repost of viper 500 video with jett 50lx

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Old 03-25-2008, 01:16 AM
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buddude8
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Default repost of viper 500 video with jett 50lx

i got a couple of pms to post the video up again. I guess it got wiped out when they did the video change.

http://myspacetv.com/index.cfm?fusea...deoid=31022810
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Old 03-25-2008, 01:25 AM
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Default RE: repost of viper 500 video with jett 50lx

nice what prop are you using and what rpms are you getting out of the 50
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Old 03-25-2008, 01:36 AM
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Default RE: repost of viper 500 video with jett 50lx

i cant remember exactly what prop it was. We were messing around and i think it was a apc carbon 7.4x8.5. It was hitting 22,000 on the ground. Not good to run it like that. After the second flight i blew the plug right out of the top. good thing dub makes his engines with a removable top insert. A better prop to run would be a 8.5x9 or around that area with rpms of around 17,500 on the ground. the smaller prop sounded faster but was hard to tell without having a radar gun.
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Old 03-25-2008, 01:38 AM
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Default RE: repost of viper 500 video with jett 50lx

also that engine is the 50lx with the black pipe. He doesnt have it on the web site, but if you call him he will make you one to use with pylon props and high rpms.
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Old 03-25-2008, 01:42 AM
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Default RE: repost of viper 500 video with jett 50lx

do you also know how fast it is goin.....[>:]
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Old 03-25-2008, 01:54 AM
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Default RE: repost of viper 500 video with jett 50lx

im sure somebody with thier computer program will tell us how fast it was going by sound. If i had to guess i would say around 150
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Old 03-25-2008, 03:33 AM
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Default RE: repost of viper 500 video with jett 50lx

buddude8, yeah I actually have the doppler programs downloaded on my pc, I am actually looking for some radard planes so i can learn how to use it more efficiantly and accuratly, the program consistantly says around 249 KPH for your plane. Very fast viper BTW. Mine does about 210KPH.

but as you said i would be very interested if some one experienced with the doppler program could tell us how quick your plane is going.

nice...
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Old 03-25-2008, 10:01 AM
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Default RE: repost of viper 500 video with jett 50lx

I only did one pass and came up with 239 kph or 148.5 mph. It is likely I did not pick the fastest pass. I agree a larger diameter would probably add a little speed.
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Old 03-25-2008, 09:56 PM
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Default RE: repost of viper 500 video with jett 50lx

for some reason I am not able to view this video
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Old 03-25-2008, 10:35 PM
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Default RE: repost of viper 500 video with jett 50lx

Hells Bells Ken! You don't mess around...Blowing the Plug CLEAR out the engine- damn...That is Ken's style!

Major props. to Mike Connor for taking the time to give us speeds on all of these aircraft. I appreciate it Mike, even if mine was 113MPH

Does doppler work on DF?

Speed Junkie and I have something in the works (couple months) and I am pushing for video footage for speed info.

Keep rockin' Ken and Mike-
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Old 03-25-2008, 11:11 PM
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Default RE: repost of viper 500 video with jett 50lx

Razor,
DF should not be a problem.
I found out pulse jets do not work though.

B EXTREME,
I have just appointed you my Doppler helper.
Our different #'s are probably because of different passes.
I made a Excel spread sheet to do most of the work for calculating in flight rpm if you are interested.
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Old 03-25-2008, 11:13 PM
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Default RE: repost of viper 500 video with jett 50lx


ORIGINAL: patzane

for some reason I am not able to view this video
Still works for me. may be a security setting on your PC.
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Old 03-26-2008, 12:53 AM
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Default RE: repost of viper 500 video with jett 50lx

Mike, we can be doppler buddies together....

yeah i am definently interested in the excel spreadsheet to measure the rpm

thanks....
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Old 03-26-2008, 01:29 AM
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Default RE: repost of viper 500 video with jett 50lx

ORIGINAL: B EXTREME

Mike, we can be doppler buddies together....

yeah i am definently interested in the excel spreadsheet to measure the rpm

thanks....
http://www.mikesrc.us/rpm.xls
you will still have to get the Fgoing and Fcomong #'s and you can see how to do that in the 'WaveosScope" thread started tonight.
not much to it but will keep you from doing all the math each time.

Edit - you may have to right click and save to your pc to use it.
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