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Old Apr 28, 2001, 02:01 AM
Registered User
Roy UT, USA
Joined Apr 2001
10 Posts
Speed 400 Q-tee

Hello, I'm converting an old Cox/Airtronics Q-Tee kit to Speed 400 power. Yes I know as some of you may say Dream Catcher hobbies is making it with a 280. but I talked to Roy Simpson and he said it's totally different and 12oz. lighter than the original. So he suggested going with a speed 400. Here's my question. Down thrust in an electric, the 1/2 A version had tons of it. Should I even worry about builing any in to my motor mounting system? Question number 2 my bet is the plane will be around 18-20 oz. all built. I have a Geared speed 400, which I can run 2:1, 2.5:1 or 3:1. I was gonna go 2:1 and about an 8X6 prop. Any suggestions?

Thanks, Greg
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Old Apr 28, 2001, 08:25 AM
Registered User
Texas
Joined Aug 1999
5,110 Posts
I'm not familiar with your particular Q-Tee, but I have seen the info on the SR Cutie.
http://www.srbatteries.com/cutie.htm

If they are about the same size and weight, they should be able to use the same power system.

Of course, the Cutie uses the X-250's s400 geared power system.

Prop Graupner Slim 9x5, fixed
Motor Graupner Speed 400, 7.2V
Gear Ratio 2.33:1
Speed Control Jeti 350
Cell SR 500 Max Series
Cell Count 10
http://www.srbatteries.com/x250.htm


Dave
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Old Apr 28, 2001, 09:24 AM
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Canada
Joined Nov 2000
7,239 Posts
I've done what you are contemplating...repower an original Q Tee with a geared 400.
Mine flew quite OK (well, it circled to altitude and floated down when out of Fuel, fun for a novice at least)
originally with it's Back widow. With a mini oly (2.3) 6v, 8 600ae's and 8x6, no wheels, at 21oz the battery powered one barely flew, level flight was a stuggle..not what I expected, remembered, or what others claimed. My younger son called it 'Lame'. after too many failed launches (a couple bungeed) stalls and subsequent repairs, we gave up... it will get a Black Widow for it's next flight!
Different notors, packs ,alternate props were tried with only slight improvement.
In disgust I foam cut a s400 size BEE .. assembled it in an afternoon using the same equipment.. it flew beautifully and proved indestructible enough so the son self taught himself to fly in a week.. the original purpose of the Q-Tee.
I heard that someone was silly enough to 're-issue' the kit.. never heard the 12oz lighter claim... Hard to believe that one!
It could be a couple or maybe even 3 oz lighter if completely built out of 1/8" sticks... But as before the parasol wing mounting is 'silly fragile' and a shoulder mount a'la S-Tee would be a worthwhile improvement.
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Old Apr 28, 2001, 02:34 PM
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wouldy's Avatar
Pacific Beach, CA
Joined Sep 2000
173 Posts
Check out http://www3.sympatico.ca/rwoolley/3.htm

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