KFm4 42'' Scratchbuilt FPV WIng - RC Groups
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This thread is privately moderated by Eastcoast78, who may elect to delete unwanted replies.
Sep 22, 2011, 11:53 PM
Dixie Normious
Eastcoast78's Avatar

KFm4 42'' Scratchbuilt FPV WIng

Well i decided to get into FPV seeing its coming on Fall here now, the air is getting cool and before you know it,t he days are well be shorter.

First up i wanted something that would be easy to fly! Carry anywhere between 4200mah or maybe even up too 5000mah, and have a AUW anywhere between 1000g-1500mah.
I considered Buying a Ritewing or something like it, But i like building and testing.
So i decided to build one from Owens cornering Pink Foam.
I got 2 4'x8' sheets for $14 from my local Home depot!

For the FPV i have the 5.8g 200mw FPV Wireless AV Tx & Rx Set
I well not be using goggles at first. I have plan to get a LCD monitor and install it in one of those Big Black Rubber maid Action packers.
Could easily make/install it like a Speaker and surround with Black foam, like the inside of a TX case!!
ANd save up for a decent pair of goggles

For the camera i well be wiring a 2.5mm 4 pole jack plug it directly feeding the video through my GoPro!

Thanks for RC Flight Test for this great video.
How To Use a GoPro for FPV (7 min 12 sec)

In trying to find a decent Powerplant that was semi efficient!! I needed something that could swing a 8 or 9 '' Prop.
So i decided to give this one a shot!

If ordering this BL get this. be sure to pick this up as well this BL does not come with any mounting hardware!
I also got 2 of these servos to test.

I have a HK 40-50A esc now...Which should hold up. Having the ESC on the wing well Provide Lots of ventilation...

Model: NTM Prop Drive 35-36A 1400
Kv: 1400rpm/v
Turns: 7
Max current: 55A
Max Power: 550W
Shaft: 4mm
Weight: 117g
ESC: 60A
Cell count: 3s~4s Lipoly
Front Mounting Hole Distance: 25mm or 19mm
Connection: 3.5mm Bullet-connector
Suggested Prop: 8x4 ~ 11x5.5

Prop Tests:
8x4 - 14.8v - 621W - 42A
8x4 - 11.1v - 277W - 25A
9x6 - 11.1v - 432W - 39A

10x5 - 11.1v -510W - 46A
11x5.5 - 11.1v - 543w - 49A

FPV is all new to me and i well not have OSD for now. Ill just keep it in view
But thats on the list as well

Heres a few pictures of the build so far!!
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Oct 14, 2011, 05:53 PM
Dixie Normious
Eastcoast78's Avatar
5.8Ghz 200mW FPV Testing (4 min 3 sec)
Oct 29, 2011, 02:51 AM
Dixie Normious
Eastcoast78's Avatar
FPV Wing Maiden (6 min 19 sec)
Feb 22, 2012, 07:47 PM
Registered User
Hey this is just the plane i have looking for to build to carry my gopro. Do You still have the plane? Could you post the dimensions?

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