is my clutch dying?

[choppaholic]

An easy way to get an engine to run the right way after it has started backwards is to let it idle for a few seconds then throttle up - the engine jumps into forwards running. So, you could still be starting it backwards due to rich needle settings or any other reason, trying to take off ..... nothing happens, blades don't turn, then bringing it back to idle for a few secs, then throttling up ...... engine jumps into forwards running, and hey presto, it works.

this i didn't know thanks, ok once i am in the air i have a very slow climb rate something slipping somewhere, i dont think the servos are week

Ben,

anyone have a tack at the club, tomorrow defo be there need this sorting out or its in the bin for it, i have had it with second hand heli's.

the wife said get the best out there i will pay for it, at least that way we know if its the heli's or you.

rebuilding as we speak, this doesn't sort out tomorrow and i am gettting an LE shiny......

[tonystevens]

Did you check the prop nut that holds the fan mount on hadnt come loose as suggested?
only this had happened to me in the past and with you saying you had just put a new engine in it sounds very similar to me...........

[choppaholic]

Did you check the prop nut that holds the fan mount on hadnt come loose as suggested?
only this had happened to me in the past and with you saying you had just put a new engine in it sounds very similar to me...........

just checking mate, everything seems tight so tight i cant even get it loose, the gap between the clutch and liner is even all the way, and is just a hair line gap and spins smooth and clean. i am stumped on this one.

the Rx batt is new had about 10 cycles, the servos i don't know. on top of all this the one way bearing keeps looking up, more heads tomorrow at the club but i think this heli is headed for the bin. i am never going to get a second hand heli again i think

[tonystevens]

weird one that,as theres not that many parts between the engine and the head you would think it would show itself on a stripdownanyway i hope you get it sorted

[J-S-Q]

Sav, apart from the one way bearing discussed previously this heli performed absolutely flawlessly every single time I took it out to fly. A couple of members of this forum were with me on the last day I flew it at Kempton Park in November and it was running very nicely indeed. I certainly never had any issues with the servos or any of the elctronics or any other part of the heli for that matter.

Are you running the governor on it or just throttle curves? Definitely worth tach-ing the headspeed if you are able to. Obviously you are running a different engine from what I had in it so possibly there's a problem related to the engine itself. I'd say your best bet is to get some assistance from someone with a good amount of experience with 600 nitros as I think it's highly likely that there's some kind of setup issue going on here.

[choppaholic]

Thanks mate, this keeps my hope alive.

but i have tried two different engines and it is doing the same, so its not he engine. at the club on Sunday there were mixed feeling as to what can be slipping as it seems rather odd. one moment it flies fine the next tank it starts to slip again.

then the battery lead went loose and the heli did a chicken dance. not much damage just blades and a head link, but sadly the fault finding got halted.

one of them suggested the Clutch one way bearing might be slipping, but i am puzzled if that can be it, i thought the clutch one way is only to start the engine then the drive is taken through the clutch bell, so the one bearing even if slipping shouldnt matter. should it??? have i got it worng.

i have ordered a new clutch, bell, pinion gear, starter shaft, main gear, one way bearing, main gear block and main shaft. just to be clear and hope this gets rid of the problem and also the one way bearing jamming problem.
its sure is a funny one

[J-S-Q]

Yes it sure is a funny one. You're correct about the starter shaft one way bearing -if that was slipping it would just mean you'd have trouble starting the engine. The only things that could be slipping are the engine fan mount (slipping on the engine shaft), the clutch or the main one way bearing. I can't see what else it would be.

I know it's pretty straightforward but are you sure you've been installing the fan mount correctly on the engine shaft? You've got the washer on the shaft first? Are you locking the crank and tightening the nut pretty well and then threadlocking/tightening the two bolts on the side? I would be tempted to replace the engine fan mount and as I said in my previous post I don't mind sending you the cost of that part -that's the only part I can think of that wasn't in tip top condition although again I had none of these problems with it -quite honestly I was shocked by how reliable the 600N proved to be!

Also... are you absolutely positive that it's something slipping as opposed to the engine losing power somehow? (fuel supply problem, throttle servo, engine problem etc.) i.e. can you hear the engine reving high but with a lack of headspeed OR can you hear the engine revs drop as well as losing headspeed?

Is the your battery definitely ok? I suppose if the battery is knackered particularly in this very cold weather it could introduce problems with the electrics/glitches etc.

If you can get over to West London some time I could have a look and see if I can spot anything you've missed.

By the way, after your chicken dance you should check the bearings (if you haven't already done so) in the blade grips and main shaft etc. to make sure they haven't become notchy.