Construction Rating: starstarstarstarstar
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar
Manufacturer: Art Applewhite Rockets
Art Applewhite Double Helix 13mm

The Double Helix is another new twist on the monocopter (pun intended)--it has two wings and flies on two motors. In fact, it's more or less two 13mm Helix Monocopters stuck end to end. Technically, it's not a monocopter but a bi-copter.

The parts list:

  • Two 1/16" Basswood sheets
  • One 24mm tube
  • Two BT-5 motor mounts
  • Two ¼" dowels
  • ¼" launch lug
Art Applewhite Double Helix 13mm

This build is exactly like that of the 13mm Helix Monocopter, there's just a little more of it. It only requires Elmer's Glue All and an X-Acto knife with a new #11 blade. Instead of repeating myself, I'll refer the reader to that review.

I have generally just been giving my monocopters a clear coat, but on this one I decided to paint one wing day-glo red and the opposing wing day-glo yellow. The body is still just clearcoated.

Construction Rating: 5 out of 5

Art Applewhite Double Helix 13mm

You form thrust rings with masking tape and friction fit the motors so they won't fall out. The motors should be oriented with their nozzles down. As with a Art's standard monocopters, you need a sturdy pad with a short ¼" rod (1" or so). Art provides plans for a suitable monocopter pad in the instructions. You will also need a clip-whip or a controller capable of firing two channels simultaneously since there is no way to twist those igniter wires together.

I flew the kit on two A3-4Ts ignited with a clip whip. It flew very nicely and went higher than its single-motored counterpart.

Unlike most of Art's monocopters, this model continues to spin until touchdown.

Flight Rating: 5 out of 5

Like the standard Helix, this kit is easy and quick to build. When I first got this kit, I wasn't sure I'd like the clustering. However, the flight changed my mind. I liked the performance and the auto-rotating recovery.

Overall Rating: 5 out of 5

Other Reviews
  • Art Applewhite Rockets - Double Helix (13mm) {Kit} By John Lee (July 11, 2008)

    Brief: The Double Helix is a great variation on the simple monocopter design from Art Applewhite. It is extremely simple to build and goes together quickly. It's also even more fun to fly than the Helix. I was lucky enough to get to watch the flights of the prototypes as Art was developing this line and now it seems like he is the source of a monocopter renaissance. It's a lot of ...


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