Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Need help making a twin air 45 go fast.

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Old 01-12-2007, 03:19 AM
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nitro junky
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Default Need help making a twin air 45 go fast.

I am working a Northeast Aerodynamics twin air 45. In the spirit of the brotherhood it must go fast. So I need some help. I am looking for two engines that will make this thing go fast as hell, but not break the bank at the same time. I would like to stay in the $600 range for both of the together. Dose any one have any thoughts?
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Old 01-12-2007, 09:57 AM
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Default RE: Need help making a twin air 45 go fast.

Sounds like a pair of Sport Jett .50's is what you need, @ $295.00 a piece. If you upped your budget to $700 you could go for .60LX's. But I imagine the SJ50's will haul it pretty aggressively!

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Old 01-12-2007, 05:23 PM
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Default RE: Need help making a twin air 45 go fast.

A pair of Thunder Tiger 46 engines, add Jett-stream mufflers. About $150 each total cost.

Use 10x6 or 9x7 props.

Make sure you install retracts in the plane.
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Old 01-12-2007, 05:54 PM
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Default RE: Need help making a twin air 45 go fast.

There was an ad in the RCU classified a few weeks back for a pair of new in box K&B 1.00 ducted fan engines for $200 each or $400 for the pair. Don't know if they sold or not but that'll really make the twin GO.

Some reinforcing suggested
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Old 02-25-2007, 01:24 PM
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Default RE: Need help making a twin air 45 go fast.

This post is getting a bit dated but I just saw it.

I've been running a pair of 46AX engines with Ultrathrust mufflers on my Twin-Air for a couple years now. They turn 10.5x6 props around 14,000 RPM. The Twin Air is not all that clean a design and so its not a real speed plane. But mine is a good bit faster than the sport planes flying at my field and does turn some heads. I'm not sure that trying to get more out of it than this is realistic.

I have a pair of Jett FIRE 50's and pipes on the way for my glassed and painted Deullist. I expect a bunch of speed out of this combo. But I wouldn't try this on a Twin-Air.

Walt
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Old 02-25-2007, 02:16 PM
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Default RE: Need help making a twin air 45 go fast.

If you are still building, add fillets everywhere, especially on the wings. The wing-fuselage joint on low wing planes has a lot of drag.

Seal all the control surface joints.

Definitely use retracts and add doors, especially on the nose gear.

Lay your aileron servos down with just the pushrod going out of the wing.

Ditch the wing tips and add end plates. They cut drag. You also might clip one bay off each wing.

In the same price range are the Tower .75 or Magnum .91XLS with a Jett muffler. You'll have to play with servo and battery placement for balance, but I think you can get the CG in there.

Embed 1/64 ply and sharpen the trailing edges of all your controls.
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Old 02-25-2007, 03:35 PM
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Default RE: Need help making a twin air 45 go fast.

Jeez...how many airplanes you got ???
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Old 02-25-2007, 04:06 PM
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Default RE: Need help making a twin air 45 go fast.

Ha prop top

I have been buzzzzzzzzzzzzy as hell this winter. I built a Sonic, Viper 500, Sea Halk, twist, Ultimate Biplane, DD, JR venture Cp . I am working on the twin air and a mojo right now and I just picked up a Raptor 30 yesterday at the WRAM Show. If I have time I bought a GEE BEE Z to build but it will be close thisnone is on the back burner for now.
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Old 02-25-2007, 06:29 PM
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Default RE: Need help making a twin air 45 go fast.

How many airplanes do I have? I counted 21 in the garage in various states, many without radios. My buddy, Flaps Laffert, is 85 and all he does is build and I do the flying. He must have a dozen or so at his house. We do try to sell them off when we can. Plus, I build most of my own ARFs. Flaps will get on a kick of twin or seaplanes or WW I bipes od scale and he'll do several. Well, he only did 3 bipes, but we are on our 23rd twin, the Stealth canard twin, and he is working on a canard seaplane flying boat which will be our 16th seaplane and 10th canard. I'll admit a lot of our seaplanes are old land planes on floats.
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