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Model Forum / Radio Controlled / Helicopters / May 2004Backlash
Anyone know how it's possible to adjust the backlash when the clutch assembly and engine are securely fixed to the frame? My MRB's are easily turned in the normal direction (a sort of manual auto) but it grinds and sticks a bit in the other direction. If i push the front of the engine upwards, i can get it turning a bit smoother, but as i let it go, they grind to a sudden halt. There is no adjustments i can make to it to allow it to turn smothly as like i said before the engine/clutch assembly are securely fixed to the frame. Maybe my clutch is worn after all. :-( Regards, Moonstone > Anyone know how it's possible to adjust the backlash when the clutch > assembly and engine are securely fixed to the frame? My MRB's are easily [quoted text clipped - 8 lines] > > Moonstone 'ere matey, how often do you expect yer MRB's to be spinning the wrong way? I've been flying my heli for about 7 months now and on 0 occaisions have my blades spun in any direction other than normal. Now, I like to keep an open mind... and your heli may act differently. Point is, if it's likely to spin in both directions then try and sort out the backlash, otherwise just go and fly it :P Andy > > Anyone know how it's possible to adjust the backlash when the clutch > > assembly and engine are securely fixed to the frame? My MRB's are easily [quoted text clipped - 18 lines] > > Andy Lol, i didn't mean when the engine was running. My m8 has the same model and his blades spin freely in BOTH directions. More freely the normal way i hasten to add. Mine USED to spin easyish in the "wrong way", but not any more. :-( Moonstone >>> Anyone know how it's possible to adjust the backlash when the clutch >>> assembly and engine are securely fixed to the frame? My MRB's are [quoted text clipped - 25 lines] > > Moonstone Sounds like trhe one-way bearing in your auto is dragging. Try removing the main shaft and cleaning the bearing, then put a little THIN oil on it. Should help your blades turn the wrong way again!  SignatureDave S, Kuusankoski, Finland. My return address requires modification before use. What is the Helicopter? It sounds a bit trollish, "if I push the front of the engine upwards" Either a troll or a bag of worms... > >>> Anyone know how it's possible to adjust the backlash when the clutch > >>> assembly and engine are securely fixed to the frame? My MRB's are [quoted text clipped - 29 lines] > main shaft and cleaning the bearing, then put a little THIN oil on it. > Should help your blades turn the wrong way again! > What is the Helicopter? > > It sounds a bit trollish, "if I push the front of the engine upwards" > > Either a troll or a bag of worms... Trollish?? Bag of worms??? Would that be a big bag of worms? Cos if it's no, then ahm no buyin' them. Nae trolls or worms in sight. What i meant by the "if I push the front of the engine upwards" is that if i apply a bit of pressure to the front of the engine near to where the glow plug sits (but in an upwards "towards the servos" motion) the movement is more loose, but the second i remove the pressure, it stops. Hmmm! Moonstone Sorry your still not making any sense - what is the helicopter and what is the engine? It might be that the motor mount is the wrong way round or not aligned correctly. > > What is the Helicopter? > > [quoted text clipped - 12 lines] > > Moonstone > Sorry your still not making any sense - what is the helicopter and what is > the engine? It might be that the motor mount is the wrong way round or not > aligned correctly. When do i ever make sense. :-) The heli is a Nexus 30 with an MDS 38 engine installed. Everything was ok last time i flew it. Never touched it, but virtually overnight something changed. Now when i try to fly it, i can have the thing at full revs and all it wants to do is turn on it's skids. It WON'T lift off!! I have posted a binary pic on this newsgroup of the clutch interior just incase someone could tell me by looking at it if the clutch lining has worn out. Cheers, Moonstone Its most likely the clutch lining - they are only a few pence so its worth changing. > > Sorry your still not making any sense - what is the helicopter and what is > > the engine? It might be that the motor mount is the wrong way round or not [quoted text clipped - 12 lines] > > Moonstone Could it not be the engine?I hear MDS are pretty crap > > Sorry your still not making any sense - what is the helicopter and what is > > the engine? It might be that the motor mount is the wrong way round or not [quoted text clipped - 12 lines] > > Moonstone > Could it not be the engine?I hear MDS are pretty crap Naaaah! Although i have heard that MDS are crap too, there is LOADS if life in it. The engine is well ok. I think Stickman has it. Gotta be the clutch lining. I was just lookin' for input first to maybe confirm it. Cheers Moonstone >Subject: Re: Backlash >From: "Moonstone" reaper12772@yahoo.co.uk [quoted text clipped - 10 lines] > >Moonstone Just a thought... if you aren't using them already, use washers under the bolt heads that fix the engine mount in place. This should give you a little bit of movement for adjustment without the bolt heads settling back into the recess they might have already made. >> What is the Helicopter? >> [quoted text clipped - 12 lines] > > Moonstone You shouldn't be able to move the enginie like that, there has to be something lose. I'd give it all good check over. SignatureDave S, Kuusankoski, Finland. My return address requires modification before use. |
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