Right motor for 1/6 EC-135 t-rex

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Home › Scale › ✈️Aircraft › Scale Heli › Vario Scale Helicopters › Right motor for 1/6 EC-135 t-rex

12-08-2020 07:55 PM 4 months ago

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mccoy

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parlin,N.J. USA

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Right motor for 1/6 EC-135 t-rex

I have a EC-135 t-rex conv. . 4 blade head, SHARKSKIN 730MM, WhaT MOTOR AND HEADSPEED AM I LOOKING FOR .tHANKS

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12-08-2020 11:09 PM 4 months ago

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Rojoalfa

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Punta de Mata, Monagas-Venezuela

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/
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You are talking about a 700 series helicopter, electric.

So, your motor spec:

Max continuous current:90A
Max output power:4000W
12s, 44.4 volts
Speed control 120A

Select your motor with specifications above... Scorpion, kontronik...

/Saludos cordiales,

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12-09-2020 09:22 AM 4 months ago

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modtron

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Oxford. UK

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I am guessing that you are not aware that Vario only suggest the normal 2 blade rotor head for the T-Rex version.
The Tail will not hold properly with 4 blades due to the mechanical speed / gearing........

modtron
Oxford UK

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12-11-2020 01:18 AM 4 months ago

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mccoy

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parlin,N.J. USA

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I am not clear on what your saying is the headspeed going to be to fast or to slow with the four blade. That can be adjusted with different KV and gearing . Your can get many gear ratios with a T-rex 700. So whats the story

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12-11-2020 08:34 AM 4 months ago

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modtron

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Oxford. UK

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Its nothing to do with head speed, but the gearing for the tail drive.

The KVa of the motoring & gearing with dictate the rpm of the rotor head - ideally around 1350 to 1450 for the 4 blade head. But the tail needs to be running at 7500 to 9500 for it to work properly.

You need to check all of your gearing to see what speed your tail will be running at.

That's why Vario only suggest the 2 blade head, as the tail speed is then less critical with less torque to compensate for.

modtron
Oxford UK

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