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RE: [Paparazzi-devel] Protocol for the downlink

From: Cédric Marzer
Subject: RE: [Paparazzi-devel] Protocol for the downlink
Date: Fri, 28 Aug 2009 10:43:41 +0200

For long distance flight we have tested a high gain motorised antenna and a
500mW video transmitter. We have tested it (without actual flying for legal
and security reason) at 45 km without problem.

But for security reason, we tend to do more short distance flights (in the
volume where you would fly with a regular RC plane) and in that case we can
use the fat shark headset that is connected to the futaba tx : that means
that you don't need any battery, receiver or extra aerial.

The OSD has two goals : I want to use it to do weather surveys like Martin
does : at the peak of the survey the airplane is too high and too small to
assure that you could fly it RC.
The second goal is to help my friend Anthony which is a very productive fpv
pionneer (he was one of the first to developp OSD, headtrackers, motorised
antenna and such) to study a way to make fpv safer by adding some kind of
autopilot that would stabilize the plane and bring it back. The problem is
more to develop the man-machine interface and the procedure to keep it
simple and cheap. All the hardware already exist. We have built so far
graphical and not graphical OSD with several microcontrollers : pic16, pic32
and LPC 2148. So it is just a question of choosing what info is relevant to
put on the screen and interface it with the paparazzi autopilot.

I'll keep you informed and hope the make both the code and the hardware

-----Message d'origine-----
De : address@hidden
[mailto:address@hidden De la part
de Gareth Roberts
Envoyé : vendredi, 28. août 2009 10:18
À : address@hidden
Objet : Re: [Paparazzi-devel] Protocol for the downlink

We used to do a lot of FPV flying - you still need a battery, the 
receiver, aerial and if you want to record you need something like an 
Archos anyway. 
The video link is going to go way before the datalink anyway if your 
setup is anything like ours :).  What we do now is mirror the screen to 
the s-video port of the laptop and then plug video-goggles in - maybe 
this would be better for you?  This way you get all the recording stuff, 
and others can also watch on the laptop screen.
If you do still decide to go the aircraft route though, good luck!

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