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Compass 7HV, 7HVU and Chronos Compass Compass 7HV, 7HVU and Chronos Model Helicopter Discussion


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Old 02-27-2014, 05:36 AM   #21 (permalink)
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Quote:
Originally Posted by Rob43 View Post
PI x D^4 / 16...right, Taz? Is my rememberer correct?
Actually it is pi x r^4 /4 for solid cylinder and pi x (r2^4-r1^4)/4 for tubes.
If you try to write it using diameter instead of radius it is: pi x D^4/64
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Old 03-04-2014, 04:13 PM   #22 (permalink)
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I'm also thinking how to stretch my 7hv, are you sure there isn't any compatible belt that we can use with stock gears and pulley?

I think it will fly great with 12s stock motor and 753mm blades using lower rpm like 1500-1700.

If anyone know a solution or can ask to Compass if it is possible, please report back.
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Old 11-01-2015, 05:40 PM   #23 (permalink)
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Quote:
Originally Posted by uragano47812 View Post
I'm also thinking how to stretch my 7hv, are you sure there isn't any compatible belt that we can use with stock gears and pulley?

I think it will fly great with 12s stock motor and 753mm blades using lower rpm like 1500-1700.

If anyone know a solution or can ask to Compass if it is possible, please report back.
What's the belt width? You can get HDT belts with 3mm teeth(which is what I believe Compass uses) here in very long lengths:

http://shop.polybelt.com/Black-Rubbe...g-Belts_c7.htm

Last edited by Atomic Skull; 11-01-2015 at 09:24 PM..
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Old 11-07-2015, 05:27 PM   #24 (permalink)
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Don't understand why compass isn't adding more boom options with different belts, booms and control rods.

The heli is capable of it. There is demand so what's the problem. Really like to run 716 blades on it with 115 tails.
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