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Old Feb 04, 2016, 02:58 PM
Milan Valenta is offline
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New Product
Contradrive-mini

Hi guys
This is new product from czech republic It is mirco motor with "planetary gearbox". weight this system without propellers is about 10.1g. Now i have 13" propellers from PTmodel. My plane weight 74g RTF and no problem with thrust.
Milan
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Last edited by Milan Valenta; Feb 13, 2016 at 01:06 PM.
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Old Feb 04, 2016, 05:01 PM
santiago3d92095 is offline
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how much is the system?
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Old Feb 04, 2016, 05:30 PM
Vince Caluori is offline
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Thanks for sharing this! Great looking airplane. Could you share more details? How much do the props weigh. Your airplane looks like it should be much lighter; of course that depends on weight of electronics and props.
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Old Feb 05, 2016, 02:39 AM
Milan Valenta is offline
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Quote:
Originally Posted by santiago3d92095 View Post
how much is the system?
Questions about the money only on mail valenta.robcice@seznam.cz
Milan
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Old Feb 05, 2016, 02:46 AM
Milan Valenta is offline
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Quote:
Originally Posted by Vince Caluori View Post
Thanks for sharing this! Great looking airplane. Could you share more details? How much do the props weigh. Your airplane looks like it should be much lighter; of course that depends on weight of electronics and props.
I used 4x TGY 1290p, Duplex R7 nano EX, 2s 150mAh battery weight 8,4g, but propellers not yet so light, one prop weigh about 4,8g
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Old Feb 05, 2016, 06:00 AM
Finnspeed is offline
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Very nice! We were waiting for someone to do this - a planetary gearbox is one obvious method to achieve torque cancelling contra drive. Just like the Brenner contra for F3A.

What's the gear reduction ratio?
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Old Feb 05, 2016, 07:07 AM
Milan Valenta is offline
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Quote:
Originally Posted by Finnspeed View Post
Very nice! We were waiting for someone to do this - a planetary gearbox is one obvious method to achieve torque cancelling contra drive. Just like the Brenner contra for F3A.

What's the gear reduction ratio?
I not sure, but something about 1:3.8
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Last edited by Milan Valenta; Feb 05, 2016 at 07:12 AM.
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Old Feb 13, 2016, 02:47 PM
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hi guys
Today i'm testing finali product contradrive-mini with 13" propeller from PTmodel, my plane weight 71g.
F3P-AP contradrive-mini (5 min 4 sec)
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Old Feb 21, 2016, 02:22 PM
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hi guys,
So, gearbox have 2 hours fly time, everything is okay.
Milan
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