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Old Apr 26, 2012, 07:28 AM
Registered User
Windsor, Canada, near Detroit
Joined Jul 2007
5,160 Posts
Discussion
detecting thermals

what do you know about telemetry for detecting thermals?
i have seen something with 'winged shadow'. has any1 tried it?
any other equipment?
should be interesting for all to hear about it.
or is there a thread on it already? where?
thanks
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Old Apr 26, 2012, 07:42 AM
turn, turn, turn.
Athol, Massachusetts
Joined Oct 2005
10,449 Posts
I'd say that that sort of thing is a good learning aid.

I tried an Eagle Tree years ago... I could always tell I was in lift before I was notified.

Admittedly, I was always under 400 feet.
Way up high, it would probably be very useful for cross country flight.
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Old Apr 26, 2012, 11:47 AM
FPV Desert Beta Test Center
Mesa, Arizona
Joined Nov 2006
2,451 Posts
I use one on my FPV Bird of Time with an ear bud speaker. The audio is picked up by an on-board mic and sent to my ground station. I also use a Range Video OSD which has a analog bario vario and the two are in perfect sync. For FPV thermaling an audio vario is IMO very helpful.

This is a recent clip.

http://tinyurl.com/7t37u3b
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Last edited by Gary Evans; Apr 26, 2012 at 11:53 AM.
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Old Apr 26, 2012, 12:11 PM
AMA7224 LSF1832
Leadchucker's Avatar
United States, DE, Seaford
Joined Sep 2008
3,532 Posts
Good heavens man, how do you listen to that for any amount of time? While I can appreciate it's job, that tone would drive me barking mad in short order. Nice ride none the less
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Old Apr 26, 2012, 12:21 PM
FPV Desert Beta Test Center
Mesa, Arizona
Joined Nov 2006
2,451 Posts
Then you wouldn't like a real sailplane because that's the music of cross country thermaling.
The volume should be just high enough to hear.
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Old Apr 26, 2012, 12:24 PM
Since 1952
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Canada, AB, Edmonton
Joined Oct 2004
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It would drive me "barking mad" too, in a few minutes.

And I've always thought it would be a bit like fishing with dynamite.

But it no doubt provides a useful function, and would be interesting to experience. To each his own.
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Old Apr 26, 2012, 02:03 PM
Registered User
Windsor, Canada, near Detroit
Joined Jul 2007
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great advice

Quote:
Originally Posted by Gary Evans View Post
I use one on my FPV Bird of Time with an ear bud speaker. The audio is picked up by an on-board mic and sent to my ground station. I also use a Range Video OSD which has a analog bario vario and the two are in perfect sync. For FPV thermaling an audio vario is IMO very helpful.

This is a recent clip.

http://tinyurl.com/7t37u3b
that's great. could you provide details? as many as you can.
everything you can throw in.
diagrams, sources.
of course, we can lower the volume to be barely heard
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Old Apr 26, 2012, 02:30 PM
FPV Desert Beta Test Center
Mesa, Arizona
Joined Nov 2006
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Quote:
Originally Posted by phil alvirez View Post
that's great. could you provide details? as many as you can.
everything you can throw in.
diagrams, sources.
of course, we can lower the volume to be barely heard
The audio function is a recent addition to the vario. It originally was not intended for for FPV and would only wag the rudder upon entering lift. It generates a line level audio signal that can be turned on/off at the radio and can indicate either up only or up/down. It doesn't come with a speaker so you need to install your own. Being a line level signal only ear bid sized speakers can be driven without amplification. I already had an on-board mic to monitor engine run so just installed the ear bud speaker right next to the mic. It is only turned on during thermaling.
To receive the signal at a ground station requires an on-board Tx and ground station Rx/speaker which you would already have for FPV. If your not doing FPV it would not be very practical because of the added hardware. For non-FPV use the rudder wag would be the ticket. There are varios that can send down the signal to a special receiver but they are way more expensive.
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Old Apr 26, 2012, 02:47 PM
Registered User
Windsor, Canada, near Detroit
Joined Jul 2007
5,160 Posts
scout

thanks, Gary. very interesting.
i rather go for something like the thermal scout from winged shadow, with the circuit they suggest on the manual, and sends a sound very much like yours. it's here: http://www.wingedshadow.com/thermalscout.html
See the Data Output Mode Instruction Supplement for full details.

has any1 tried it?
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Old Apr 26, 2012, 04:40 PM
FPV Desert Beta Test Center
Mesa, Arizona
Joined Nov 2006
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Quote:
Originally Posted by phil alvirez View Post
thanks, Gary. very interesting.
i rather go for something like the thermal scout from winged shadow, with the circuit they suggest on the manual, and sends a sound very much like yours. it's here: http://www.wingedshadow.com/thermalscout.html
See the Data Output Mode Instruction Supplement for full details.

has any1 tried it?
Sorry apparently I didn'take myself clear but that is the vario I'm using.
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Old Apr 27, 2012, 02:14 PM
Foam flogger
Roseville, CA
Joined Apr 2009
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I use the Thermal Scout. It does a pretty good job and I can see the wag at over 2000 ft agl. I haven't set it up yet to my telemetry module.
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Old Apr 27, 2012, 02:39 PM
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United States, AZ, Fort Mohave
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Anyone else have oppions on the Thermal Scout ?
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Old Apr 27, 2012, 03:56 PM
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Doo-doo-dee-dee........

Almost as bad as some of the crap they call "music", these days, but at least it is passing along some intelligence!
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Old Apr 27, 2012, 04:24 PM
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Windsor, Canada, near Detroit
Joined Jul 2007
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kind of advice i needed

Quote:
Originally Posted by Belem View Post
I use the Thermal Scout. It does a pretty good job and I can see the wag at over 2000 ft agl. I haven't set it up yet to my telemetry module.
thanks for your input.
i will get 1 and see if that is all that i need to catch-and stay in-a thermal.
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Old Apr 27, 2012, 05:10 PM
Foam flogger
Roseville, CA
Joined Apr 2009
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I know a couple of people here use them. Try this post in the Thermal section and you might get more hits. I find that it does a pretty good job signaling lift. Staying in it is another matter lol.
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