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Old Jun 24, 2012, 06:45 AM
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Can someone tell me how fast this goes

Can someone do a doppler on this video, I am wondering how fast it flys...

http://www.rcgroups.com/forums/showp...postcount=1462

Thank in advance.
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Old Jun 24, 2012, 01:06 PM
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I will guess 105 mph..sorry no doppler on hand
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Old Jun 24, 2012, 01:11 PM
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United States, TN, Jackson
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Quote:
Originally Posted by frank40 View Post
Can someone do a doppler on this video, I am wondering how fast it flys...

http://www.rcgroups.com/forums/showp...postcount=1462

Thank in advance.
There's a lot of wind and background noise to it's going to be hard to Doppler...Even people talking close to the mic can make pulling out the audio for Doppler difficult...However, @ 1:21 into the vid I did get an RC Speedo clocking of 103.4MPH...It's been my experience that the RC Speedo app shows about a couple of MPH faster than Doppler...Still, 103MPH ain't too shabby for as small as these models are and now at least you now have an idea of what it was doing...Get more runs without the windy background noise...If you can't get a vid without wind noise, fashion a wind muffle from some open cell soft foam...This will keep the wind from whipping across the face of the mic...

Kevin
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Old Jun 24, 2012, 01:12 PM
it wasn't me flying that plane
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United States, NC, Wilmington
Joined Mar 2011
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Frank,
If you do not ha e your answer shortly I will Doppler it for you..
My daughter is on Netflix...and when she's done with her movie I will get it dopplered..
The program is right here in this forum..just need both my comps to do it..play it on the laptop and listen(Doppler) through the tablet....
I'll check back in 2 hours or so..
Edit,
Ah Kevin got you while I was posting...lol....
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Last edited by Hover or die; Jun 24, 2012 at 01:18 PM.
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Old Jun 24, 2012, 01:14 PM
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Denmark, Nordjylland, Gistrup
Joined Aug 2005
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Frank du skal have et godt tilløb og så skal du helst fortsætte ligeud i 2 sekunder efter flyet har passeret kameraet. Så skal de også vide hvad temperatur der er under flyvningen.

Mvh. Flemming

I am just trying to tell him how to make a god doppler run.
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Old Jun 24, 2012, 01:21 PM
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Thanks for your replays, I will se if I can't get anointer video. Chris I will be happy if you could give it a try.
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Old Jun 24, 2012, 05:12 PM
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United States, TN, Jackson
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Quote:
Originally Posted by Hover or die View Post
Frank,
If you do not ha e your answer shortly I will Doppler it for you..
My daughter is on Netflix...and when she's done with her movie I will get it dopplered..
The program is right here in this forum..just need both my comps to do it..play it on the laptop and listen(Doppler) through the tablet....
I'll check back in 2 hours or so..
Edit,
Ah Kevin got you while I was posting...lol....
I didn't Doppler it but used the RC Speedo phone app so if any of you want to confirm what I got with Doppler I welcome it as I'm wanting to see/confirm how accurate RC Speedo is...

Frank---I don't know how to read Danish but it looks like our European friend was reminding us that we need to know the temperature...My RC Speedo app was used when my local temp was 94* which I'm sure your temp was lower...

I've gotta say though that Turbonut posted while I was getting the speed and his guess of 105MPH being as close to what I got is impressive!!!.....

Kevin
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Old Jun 24, 2012, 11:55 PM
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Shucks it is just my fine tuned sence of smell...ha
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Old Jun 25, 2012, 10:16 AM
Spoooooon!
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San Fernando Valley, California, United States
Joined May 2003
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It's difficult to get clean doppler on that. You'll need to fly level across the camera without climbing or turning after the pass for a couple seconds. Also, don't cut the throttle during the pass. Don't forget to do up wind and down wind passes so you get the true speed. Good luck!
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Old Jun 25, 2012, 10:55 AM
kin
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Very fact nice speed that is we looking for this feel !!!!!!!!!! What is that models ?
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Old Jun 25, 2012, 12:36 PM
it wasn't me flying that plane
Hover or die's Avatar
United States, NC, Wilmington
Joined Mar 2011
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Frank,
I use the same program s Kevin uses...RCSpeedo..
It has a very hard time reading through the wind...
next time you video use the method the Tick suggested...Level passes without touching the throttle...
and we will be able to get a clean reading....
take care...............chris
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Old Jun 25, 2012, 03:51 PM
High Dynamic Thrust
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United States, FL, Mt Dora
Joined Feb 2007
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looks about 80mph
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Old Jun 25, 2012, 04:19 PM
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Denmark
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Thanks again...

I can se this video is no good, after reading your replays I realized other factors as well. For most of this flight I fly with about 50-60% throttle, only one pass at full power....and the fact the the model is flying at a angle at about 30 degrees toward me, may also affect the result. I guess I have to make another video. I would estimate it to go as fast as 200 Km/h thats 125 mph with full power, but this is only a estimation.

The model is a joined design project that I started for about a year ago here in RC groups, for more info look here: http://www.rcgroups.com/forums/showthread.php?t=1428925

Temp. was around 65-70 Fahrenheit
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Old Jun 25, 2012, 04:38 PM
Capt. Z
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United States, NV, Las Vegas
Joined Dec 2004
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Can the two passes here be dopplered?

Thanks

Andy

Untitled (0 min 43 sec)
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