FPV speed challenge

[Pasty]

They went very well, even in the gusty 20-30mph winds, Garys was quite a bit faster than mine so we've got to find out whats going on there, first stop is to try his prop... after that the only differences are his fuz is taped with a slightly smaller cross section to the nose. I'll check the timing etc on my esc, I dunno whether that will make any difference?

Ordering another vTX as I type so will be a week or so before I get her FPVed up. Cant wait to cover some ground with her :D

[hexo]

My FPV speed machine test video: MOV03567

;D ;D ;D ;D ;D ;D ;D

[Coyote]

Yup, i think thats officially fast :) Steve, what are you doing, he`s wiping the floor with you already lol

[Pasty]

ehehe I like a bit of competition and I dont see anything coming from anyone else at the mo :D

My motor didnt sing like Garys did, must be either the prop or ESC.

Vtx and 45amp ESC ordered...

[Pasty]

So... calling all yee leccy powertrain boffs.

Whats the best way to make a small leccy plane go quick?

Higher KV motors spinning a small prop real fast? if so, whats a good KV and amp to be looking at? using 3s and 4s packs again... no crazy 6s stuff here.

My Bros blizzard is pretty damn fast on a 1400kv 35amp motor spinning a 9x6 on 3s, maybe thats the way to go with say a 9x8 or the like.

thoughts?

[g.collins]

The Worlds Fastest RC Airplanes Close to 400 mph
crazy fast rc plane 5000kv
Have a look Steve, thy may give you some ideas.

[Pasty]

That DS vid is old news now, they're going even faster! I do a bit of dynamic soaring myself, I'm certainly not going to give it a go via fpv tho!

if only there was a bit more info on what that leccy plane was running...

cheers gordon


Just checked my GWQ and I think I found why it was slower than Garys, the split ring had come out of its slot on the shaft allowing the outer case to pull off....

[hexo]

So... calling all yee leccy powertrain boffs.

Whats the best way to make a small leccy plane go quick?

Higher KV motors spinning a small prop real fast? if so, whats a good KV and amp to be looking at? using 3s and 4s packs again... no crazy 6s stuff here.

My Bros blizzard is pretty damn fast on a 1400kv 35amp motor spinning a 9x6 on 3s, maybe thats the way to go with say a 9x8 or the like.

thoughts?

This seems to have some good info.

http://www.rcgroups.com/forums/showthread.php?t=939982

[Pasty]

so, we're all about keeping our planes light with high KV motors spinning a small high pitch prop.

For the packs we're using I think we're right with the size and type of plane, need to get me a pokier motor  :D

[g.collins]

http://i1217.photobucket.com/albums/dd397/itsalivecollins/plane.jpg
Hi Steve, I designed this and laser cut it out of thin balsa wood will this technique mack it lighter.

[electricmick]

You have the right idea: high voltage or high kv motor, small diameter, big pitch prop. But from the video if you want to go even faster you have to delete the motor, cool.

I have a LR1A Pogo electric pylon racer that uses a E-Flite Power 25 1250kv motor driving a 8x8 prop from a 40C 2650 mAh 4S battery. It sings nicely but still only does 100-110mph. It is the basic NMPRA approved set-up for EF1 electric pylon racing. It is an absolute bitch to take-off as the torque reaction is huge but good fun for about 4 min then a landing is required. My knees shake so I cannot imagine flying it FPV but never say never.....

[Pasty]

http://i1217.photobucket.com/albums/dd397/itsalivecollins/plane.jpg
Hi Steve, I designed this and laser cut it out of thin balsa wood will this technique mack it lighter.

Very nice gordon, that would certainly make a light wing and fuz, it would be quite a bit more fragile than the foam approach, if I can get the planform working well it might be worth a short.... altho I havent balsa bashed since I built my first trainer!

[Pasty]

You have the right idea: high voltage or high kv motor, small diameter, big pitch prop. But from the video if you want to go even faster you have to delete the motor, cool.

I have a LR1A Pogo electric pylon racer that uses a E-Flite Power 25 1250kv motor driving a 8x8 prop from a 40C 2650 mAh 4S battery. It sings nicely but still only does 100-110mph. It is the basic NMPRA approved set-up for EF1 electric pylon racing. It is an absolute bitch to take-off as the torque reaction is huge but good fun for about 4 min then a landing is required. My knees shake so I cannot imagine flying it FPV but never say never.....

Ahhh yes, of course, voltage...  so for cheap speed we're defo barking up the right tree, keep it small, light running higher KV motors.

We're working on hiding the motor, I started work on fuz MK2 last night and ordered a spinner to streamline the entire front end. The MK2 fuz will also be big enough to house a 4S :)

[Pasty]

so... some minor repairs done last night, I've sorted the motor out but it still doesnt spin as freely as garys but it seemed to spin up ok so we'll see how it gets on.

This evening we're headed out for some more flight testing, Gary is trying to tame his down to make it fpv friendly (not speed but handling) and I'm simply trying to get mine to go as fast.

Will report back later.

[g.collins]

Ha steve
I have just fond this setup at Range Video. I couldn't resist it, its so small and light, I'm going to stick it on something small, plane that is.
2g for the transmitter and 1g for the camera and it will all run of a single cell lipo, it will keep the wait down in your speeder, less wait more speed, well worth a look
Camera, Receiver and transmitter all for £77.57 delivered

http://www.rangevideo.com/index.php?main_page=product_info&cPath=35_59&products_id=217
http://www.rangevideo.com/index.php?main_page=product_info&cPath=6&products_id=212
http://www.rangevideo.com/index.php?main_page=product_info&products_id=213