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Jan 16, 2010, 07:14 PM
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trappy's Avatar
Build Log

The ultimate FPV glider

Today I started the build on my FPV Supra. For those of you that don't know the plane, check out the website of Kennedy Composites or watch the movie I made of the non-FPV version
Supra Re-Maiden (3 min 51 sec)

For me this is the ultimate FPV glider, even the ultimate FPV aircraft. It's hollow-molded full glass with carbon fiber reinforcements. The Supra travels at around 40mph, but it can be slowed down to ~10mph for landingings. The top speed should be near 130mph. The glide ratio is out of this world (~1:40), the plane can fly forever and then some on a very small LiPo pack. With the power system I have on board, it will climb at 17 meters per second (~3300 feet per minute). It will be built from the ground up for FPV.

This build includes a couple of "advanced" stuff such as frequency diversity (2.4GHz & 1.3GHz), how to use FPV gear with a 5S battery and how to install FPV gear properly for long range (noise-free) and low drag. I'll also re-build my ground-station and post pics here. There will also be some non-FPV stuff going on ranging from R/C TX programming to build tips for composite models.

I hope we can get a good discussion going because at the end of this build-log I will release a PDF with the contents of this thread in a more structured manner.

Anyways, I got started today ... nothing FPV related yet, just some normal build steps ... here's the pictures:
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Jan 16, 2010, 07:59 PM
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jsullivan05's Avatar
$1500 for the plane... HO-LY CRAP, on another note, the thing looks EFFING SICK!... and looks like you get to break the 4 hour flight mark i bet...
Jan 16, 2010, 08:06 PM
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Nice plane.

Cool thread

any reason you don't drill 4 more holes in the firewall to allow the air intake from the spinner to enter the fuse?
Jan 16, 2010, 08:13 PM
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Daemon's Avatar
I'd be worried that that carbon wing is going to completely shadow the 1.3Ghz video antenna.
Even if you stick it out the bottom, there's going to be bank angles that block it.

Jan 16, 2010, 08:28 PM
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trappy's Avatar
David, there are holes in the fuselage, and the motor is cooled internally with a fan.

Ian, there is only a carbon spar in the wing. it will block the video at certain times, that's why I have 2 transmitters.
Jan 16, 2010, 09:07 PM
Mums the word.
man2000me's Avatar
I'm excited. Maybe once I sell my house I will follow in your foot steps. Awesome work.
Jan 16, 2010, 09:14 PM
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very cool
good job

absolutely beautiful plane you have there
Jan 16, 2010, 10:36 PM
I AP'd myself again......
aviatordave's Avatar
Cool project.

This explains why you were selling your other stuff.

Is that duct tape I see on the ESC?
Jan 17, 2010, 12:03 AM
It just keeps getting better!
Blue Sky's Avatar
Quite the dream machine!
Are you planning on using one camera and two TX's?
Any ideas yet on mounting your (camera)'s?
Jan 17, 2010, 12:49 AM
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kason's Avatar
that's really an ultimate glide ratio rate there. 1:40
tihs can travel really far!
Jan 17, 2010, 06:33 AM
Registered User
V2 Supra - Just Wet My Pants Again Trappy, Keep It Up
Jan 17, 2010, 07:07 AM
Registered User
Amazing Trappy.

Good luck breaking the 4 hour barrier!
Jan 17, 2010, 07:08 AM
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trappy's Avatar
BlueSky: Yes, it will be 1 camera and 2 VTx. The 2 VTx will take care of the problem arising with the carbon parts and to guarantee a good video connection even when banking the plane heavily (polarization diversity). I'm back to square one on the camera mount. Initially I planned to mount the pan servo in the fuse and have only the servo-head stick out, but that's not going to work (not enough room). My best choice so far is to glue everything on top the wing.

jsullivan/guyavitov: the 4hour mark will depend on whether I can squeeze enough battery in there. the second vtx will probably need to be turned off for a 4h flight, as I'll be flying with a 5S 2200mAh (that's all that fits).

aviatordave: No, there's no duct tape on the ESC. The whole ESC is shipped in a lightweight aluminum case (I think it's aluminum) for cooling and noise filtering. This really is the best ESC I've ever seen ... there's so much thought put into this (switching BEC with redundant outputs, for example!) ... but it comes at a price

The tape you see wrapped around right now is just to keep the wires out of my way while I work on the fuse.
Last edited by trappy; Jan 17, 2010 at 07:55 AM.
Jan 17, 2010, 07:26 AM
The Flying Circus
ommadawn's Avatar
Seems a shame to upset that beautiful streamlined shape with a clunky camera hanging out in the breeze.
How about a redesigned clear bubble canopy for the camera?
Jan 17, 2010, 07:54 AM
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trappy's Avatar
there's absolutely no space inside, I need to put the camera outside in any case. I might add a canopy, but maybe I'll just streamline the camera itself a little.

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