Brief:
T' Double Helix is another new twist on t' monocopter (pun intended)--it has two wings and flies on two motors. Avast, me proud beauty! Blimey! In fact, me hearties, arrr, it's more or less two 13mm Helix Monocopters stuck end t' end. Technically, arrr, it's nay a monocopter but a bi-copter.

Construction:
T' parts list:

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

This build is exactly like that o' t' 13mm Helix Monocopter, thar's just a little more o' it. Well, blow me down! It only requires Elmer's Glue All and an X-Acto knife with a new #11 blade. Well, blow me down! Instead o' repeating myself, arrr, arrr, I'll refer t' reader t' that review.

Finishing:
I have generally just been givin' me monocopters a clear coat, matey, but on this one I decided t' paint one win' day-glo red and t' opposin' win' day-glo yellow. Arrr! Aye aye! Blimey! T' body is still just clearcoated.

Construction Rating: 5 out o' 5

Flight:
You form thrust rings with maskin' tape and friction fit t' motors so they won't fall out. Begad! Arrr! T' motors should be oriented with their nozzles down. Ya scallywag! 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 t' instructions. Ahoy! Blimey! You will also need a clip-whip or a controller capable o' firin' two channels simultaneously since thar be no way t' twist those igniter wires together.

I flew t' kit on two A3-4Ts ignited with a clip whip. It flew very nicely and went higher than its single-motored counterpart.

Recovery:
Unlike most o' Art's monocopters, ya bilge rat, this model continues t' spin until touchdown.

Flight Rating: 5 out o' 5

Summary:
Like t' standard Helix, this kit is easy and quick t' build. When I first got this kit, me hearties, I wasn't sure I'd like the clustering. Avast, me proud beauty! Blimey! However, t' flight changed me mind. I liked t' performance and t' auto-rotatin' recovery.

Overall Rating: 5 out o' 5