Twin Engine Arrow - Maiden/Speed Run - Free Plans

by LetsFlyRC | June 12, 2016 | (8) Posted in Projects

The Faster Arrow Project:

So, I have been playing with the FT-Arrow for a while now, and love it.  I have been having a blast, flying LOS and FPV with it.  From racing, to fast flying, and even FPV combat, this plane is awesome.

I started out with the standard 3S setup that FT recommended, and it was fun at first.



Then, at CFL FPV, there was a wing race.  I qualified, but noticed that the other wings were way faster than mine.

Had to change that.

So, I went to all of the vendors at the event buying up motors that could possibly make it go faster.

I ended up choosing the Emax 2205 2600kv motor.

It didn't seem that fast with the standard 6" prop I was flying, so I decided to step down to a 5".

I tried, twin, tri, and quad blade 5040 HQ props, and they all were fast, but the quad blade sounded the coolest.

So, I threw it back up in the air, and was as fast, if not faster than the other planes at the event, now.  

Unfortunately, I didn't have a chance to win, because my fpv gear fried on launch.  But, the plane was a definite eye turner at that event.



Well, last week, my Arrow got beat again in a speed race against a much bigger, more powerful wing built by a friend of mine. 


So, I decided to build a twin engine FT-Arrow

Set up:

Emax 2205 2600KV Motors

UBAD 30A Angry Beast ESCs

UBAD 1800 mah 75c 4S Battery

Lemon 7ch Stabilizer Rx

Spektrum Dx9 Tx


It had a stabilizing rx, which didn't seem to work that well...

It also had differential thrust, and once I played with it some more, turned out to be somewhat useful.

Here is the Maiden, and I will link the free plans below.  Let me know what you think......



Twin Arrow Left - DXF

Twin Arrow Right - DXF

Twin Arrow - Corel Draw


nicolas1809 on June 12, 2016
What about wing folding? :D
Crazy thing by the way
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flyingsquirrelrc on June 12, 2016
that thing sounds ANGRY! I love it. :)
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The-One-Who-Never-Crashes on June 12, 2016
I love my Mini Arrow. I fly it with a Lumenier 2204 2500kv motor with an HQ5045BN prop. It screams!

Great article!
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flying-coqui on June 14, 2016
Hey you can add differential trust like the FT Sea Duck. It can make faster turns for race.

And is a great article just search for more lightweight and maybe make it VTOL (vertical take off and landing) @flyingcoqui
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LetsFlyRC on June 14, 2016
Thanks for the comment, friend, this plane does have diff thrust. Watch the video. :)
I mentioned it while flying. It didn't have much effect, unfortunately.
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Xerx on June 15, 2016
Motors are much to close for differential thrust. And there really isn't much of a vertical surface to pivot around either.
That is why F3A planes have such a thin but tall fuse, as it greatly enhances the rudders performance.

You could perhaps try a massive "shark fin" along the center line, but i still doubt it would do much with motors that close.
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LetsFlyRC on June 14, 2016
Thanks for the comments, guys. This plane was a blast to fly
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shanetill254 on June 14, 2016
Love the mod
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shanetill254 on June 14, 2016
would love to see a build video of the twin .
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Droza on June 15, 2016
Great Idea, I have done a similar modification to the Kraken a few days ago as well.
Seeing your mod, It is clear my setup is waaaayyyyy underpowered.
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leogcam on September 16, 2016
How do you make this a pdf???
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karanlkfs44 on June 16, 2017
And the guide which is given here is working very nice and cool Snapchat Sign In
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Twin Engine Arrow - Maiden/Speed Run - Free Plans