New member
I've been interested in twin boom inverted V aircraft for a while. I followed this project:
and thought I could build a slightly less scale version using the Flite test A motor, 850 mh battery, 5mm carbon fiber tubes and foamboard.

Mine weighs 330g (with battery), has a 76.4cm wingspan, 12 cm chord and wing area of about 916 sq cm.

I based the construction off the mini P-51

I started with a test piece

20220503_150001.jpg 20220503_150014.jpg 20220503_162438.jpg


New member
Made a simple fuselage. Angled up the aft of it to allow more air to get to the prop.

Heaps of room for the gear and will move the battery fwd/aft for C of G trim.


New member
Wing was tricky. I needed to have the 4 servos mounted within the wing and have the 2 rods fitted inside (not on top or bottom). I tinkered with the practice wing to find the best way. I probably over engineered it and added too much weight.


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Was too tail heavy, added weight and still about 5mm to far back. Put in an older but bigger battery but it died 2 min in. Should be easy enough to fix.




Participation Award Recipient
do you have any slop in your tail surface controls? with how you pass the pushrods down that CF tube, it looks like there could be a bit of slop.

you can test by pressing gently on the surface and see if it can move without the servo moving.


New member
Here is an A-pack sized twin boom A tail (inverted V), plans and all
Hey Jason, thanks for sharing that stuff. I wasn't sure if the foamboard would be strong enough but looks like it is. Once I saw the carbon fiber rods, however, I was hooked. The tricky bit was affixing to the wing AND getting the control rods down. I drilled a hole in the boom and fed the control rod out with a bend.
No slop in the control surfaces but one aileron servo sticks in full deflection. I haven't played with the throws yet but I will only buy decent servos from now on.
I didn't build it with FPV in mind but now it's made...