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Old Apr 02, 2003, 04:12 PM
Who Says Penguins Can't Fly?
aeropenguin's Avatar
Bay Area, California
Joined Jan 2003
2,713 Posts
Watt-Age super 400 cobalt motor + 3 blade prop

Helo all!
I have a Watt-Age super 400 cobalt 27turn motor.
I, using preferably KAN cells, a 7 or 8 cell battery pack, and a gearbox with either 2:1, 2.5:1, or 3:1, would like to get the most possible ounces of thrust, on a propeller - the smaller the diameter (8 or 9in) the better.
I was thinking that I could go with the 3:1 ratio, and use a 3 blade prop. The only one I can think of is a GWS 3 blade 9x7. What results would this give me? What other 3 bladers ar eout there? I cannot go over 15 or 16max amps.
What would you recomend?
This is what I am thinking about (maybe?)
8 KAN cells
GWS 9x7
3:1 gb
the Watt-Age cobalt.

help?
-aeroP
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Old Apr 02, 2003, 06:56 PM
1/1 scale engineer.
Flight Engineer's Avatar
Zurich Switzerland
Joined Sep 2002
223 Posts
I think you need a vario prop. You can tune em to the pitch you want from 2.5 to 6. try here
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Old Apr 02, 2003, 07:44 PM
Who Says Penguins Can't Fly?
aeropenguin's Avatar
Bay Area, California
Joined Jan 2003
2,713 Posts
yes, but:
GWS prop: $2
Vario prop: $35 for everything
If it work *okay*, I'd like to use a GWS, or another cheap plain screw on prop. I don't need quality, I need it to work, and give thrust. Only setback so far is the ugly orange.
Thanx!
-aeroP
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Old Apr 04, 2003, 12:39 AM
Who Says Penguins Can't Fly?
aeropenguin's Avatar
Bay Area, California
Joined Jan 2003
2,713 Posts
OKay, can someone just please, please, use motocalc and tell me what:
the Watt-Age cobalt
GWS 9x7 3 blade prop
8 KAN cells
geared 3:1
would give me, in terms of amps, thrust, and flight time?

I need this stuff really soon, please, can anyone do this for me?
Thanx!
-aeroP
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