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Home✈️Aircraft🚁HelicopterHIROBOOther › Sceadu evo 50 setup problem
05-24-2007 12:31 PM  13 years ago
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mmc205

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PA - USA

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Sceadu evo 50 setup problem
Hey all, i'm new to nitro helis (been doing electric for a while) and i'm having a problem, i bought a sceadu evo 50 second hand with a OS 50 sx-h engine. only problem is, when i go to shaft start it, fan/clutch assembly unscrews from the enginer crankshaft. I took engine out and tightened it only against engine compression to have it happen again as soon as a put it back together. how do you get these two together such that they don't come apart during starting? thanks a ton, i really want to get into the air.
***Logo 600 vbar***Henseleit TDR vbar***
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05-24-2007 12:41 PM  13 years ago
z11355

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New England

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I believe you are trying to start it in the wrong direction.

the motor WILL run in backwards direction but the autohub will not
let the rotors spin in that direction.
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05-24-2007 12:52 PM  13 years ago
mmc205

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I'm using a one way hirobo starter and thats the only way it will spin (it also has a one-way) i double checked the direction as well, though i could be wrong.***Logo 600 vbar***Henseleit TDR vbar***
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05-24-2007 12:56 PM  13 years ago
naked painter

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Mid glamorgan uk

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Hi

I'm not sure but you may not be getting enough purchase tightening the nut against the engine's compression. You may have to use a type of lock that prevents the crankshaft from turning.
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05-24-2007 12:56 PM  13 years ago
mmc205

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Also, I did get it to start once and they tried to spin, tried to take my arm off.....
What did i get myself into going from electric helis to glow......
***Logo 600 vbar***Henseleit TDR vbar***
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05-24-2007 12:59 PM  13 years ago
z11355

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New England

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sorry, didn't read it correctly (more coffee please).

yea, you almost assuredly have not tightened down the engine
nut enough. Get one of those delrin devices you shove in the
backend of the engine

or a plastic handled tootbrush

lots of threads on using a 'piston lock' but do NOT get one that
fits in the glowplug hole or other silly ideas like thread or
fill the cylinder w/ oil, etc etc
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05-24-2007 01:01 PM  13 years ago
RayJayJohnsonJr

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Midwest

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You need to tighten against more than compression. I take the carb off, and stick an old toothbrush handle in the crankshaft while giving the nut enough torque to start cutting into the plastic of the toothbrush handle. I stop short of slicing the handle in two. There are other methods that a search here will reveal. I also use a small drop of blue locktite on the nut just because I can. The starter should be turning counter-clockwise. Rick's also sells a tool for holding the hub while tightening the nut.
http://www.ronlund.com/Merchant2/me...ct_Code=2513035
I made one of my own, works well.

-Mark
There, their and they're. It's really that simple.
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05-24-2007 01:11 PM  13 years ago
mmc205

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Can i do this with the engine in place by using the start shaft without the one way and removing the rear engine cover? So it sounds like you guys are talking about torquing it down pretty good.***Logo 600 vbar***Henseleit TDR vbar***
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05-24-2007 01:26 PM  13 years ago
RayJayJohnsonJr

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Midwest

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It's a 5 minute job to drop the engine out of the heli. Much easier to do on the bench. If you're going to tighten the crank by removing the back plate and holding the crank, there is a special tool for that too. However I don't like to use it because of the side load it puts on the rod bushing.

-Mark
There, their and they're. It's really that simple.
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05-24-2007 01:44 PM  13 years ago
mmc205

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I think i know what i need to do now, thanks all for your help!***Logo 600 vbar***Henseleit TDR vbar***
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05-24-2007 07:42 PM  13 years ago
ssrobzoom

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Tn

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💎Sustaining Member
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