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HomeAircraftHelicopterHIROBOHirobo Sceadu › Hirobo Sceadu evo 30 Starting the engine
06-01-2009 06:23 PM  9 years agoPost 1
cadwarrior

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Canada

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hi,

Is there supposed to have a one way bearing on the starter coupling?, or it always turn with the motor?, So when the motor starts
it will turn so I need to removed quickly my starter halen? or it is supposed to have a one way bearing so when I start the motor, once the motor is started, I can
leave my starter halen in the coupling for a second without having them turning with the motor?

Thanks!

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06-01-2009 06:33 PM  9 years agoPost 2
Leif

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USA

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The Sceadu Evo does not have a oneway bearing on the start shaft. You need a start shaft that includes a oneway bearing or the engine will end up driving the starter after it fires up.

There are plenty of start shafts available with integrated oneway bearings. Personally, I prefer this to having the oneway inside the heli, as the ones on the external starter shafts are much larger and tend to be more robust. The oneway on my starter shaft has lasted over 12 years of hard use. The oneway start bearings in some recent models (such as the Avant Aurora) have reported to fail after just a few months.

Leif

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06-01-2009 06:42 PM  9 years agoPost 3
cadwarrior

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Canada

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Thanks for your answer!,

Can I break something if I do not have a oneway bearing on my starter?,

Do you recommand a specific model for the sceadu evo 30?

Thanks again for your answer!!!!!

Vincent

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06-01-2009 08:14 PM  9 years agoPost 4
Leif

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USA

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There are plenty of start shafts out there with oneway systems included. The good ones tend to cost a bit more. The one I'm using is a Kyosho shaft which costed about $75 back in the day. It's served me well.

Start Shafts

As long as your starter is a direct-drive electric starter, you can probably use it without any oneway without damage. You just need to be more careful when disengaging the shaft and ensuring that the engine doesn't rev too high when starting it.

Do NOT attempt to start the heli with a "geared" starter unless you have a oneway shaft. When the engine starts, it'll trash the gear train in the starter.

Leif

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06-01-2009 10:52 PM  9 years agoPost 5
cadwarrior

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Canada

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Thanks again for your help!

Vincent

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06-02-2009 03:15 AM  9 years agoPost 6
MRC-Hirobo

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Edison, NJ

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You don't need a one way bearing start shaft to start the helicopter. It just makes starting easier.

MRC Host

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06-02-2009 03:49 PM  9 years agoPost 7
cadwarrior

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Canada

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if i don't have a oneway bearing on my starter shaft, once the motor start it will run against the starter until I removed it?, it is not easier for the engine to have a one way bearing on the starter shaft?, no restriction once the motor start?

thanks

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06-02-2009 06:02 PM  9 years agoPost 8
tadawson

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Lewisville, TX

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It's a lot easier with the one way, and putting it on the start shaft keeps you from lugging around a useless part in the air once you get the heli started. Yes, you can start without one, but you need to get the shaft off pretty quickly once it fires . . . . and it can kick the shaft around and chip your canopy pretty easily too.

I suggest that you invest in the correct start shaft - the ones with the one way will work on any heli, whether it has it's own start one way or not, so no loss there . . . .

- Tim

Friends don't let friends become electrotarded . . . .

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