Rotor trim out?

[Carver]

Hi again,

Took my new heli out again this morning for more ground testing.

I've now noticed that when the blades are spinning, heli still on the ground, and push backwards and forwards on the stick I can see that the blades go forward and left and backwards and right? I'm assuming this isn't normal but what should I be looking at to resolve this?

Also, my engine. It's an OS max 30 engine. Already run in on another heli and starts and runs lovely. But, sometimes after I've done some ground tests and shut the engine down to make adjustments I have trouble keeping the engine running again without the glow plug starter on it. Within a couple of seconds of taking the glow plug warmer off the engine stops, even with healthy revs!

P.S.: Forgot to mention the glow plug is nearly new. A goodun.

Thanks in advance for any replies as usual.

[SlamDunK]

I had the cyclic problem myself once.
In my case the washout was not straight, the hub slider had twisted.
The washout should run 90 deg to the blades (inline with the flybar).
You probably know this but it's worth a mention.
Other than that check for any mixes in the radio.
As for the motor, I'm still learning the infernal contraptions myself.

Duncan.

[kevinh]

What Heli is it?

Are You a newbie or experienced in setting up helis

sorry if im teaching you suck eggs

[Rodsport999]

Is the heli ccpm?
More info required here.
With regard to the cutting out, is the heli brand new? If not check the cluck lines for hole's otherwise the mixture requires some fine tuning.
Always stop the heli engine by cutting the fuel supply, if you stop it with the transmitter they flood and are a knightmare to start afterwards.
I too apologise if i'm teaching you to suck eggs!

[Carver]

Hi,

I am a newbie to heli's so there's no egg sucking going on here!

I'll check the washout, thanks.
It's a SCEADU 30
CCPM? Sorry I said I was new to heli's
I usually pinch the fuel line to stop the engine but I whilst setting up the Tx and heli servo's I thought I'd try the engine kill switch, it works!

I now have another problem anyway. I tried starting the heli yesterday afternoon and have now found that something has 'bound' together. The hex starter cannot turn the engine over at all. I think it might be the clutch but haven't had time to strip it down yet. Any ideas?

[Boggy]

are you sure it wasn't just flooded tip it over exhaust side down and try and spin it over a few times

[moyesboy]

It could be flooded in which case try the method above
or remove the glow plug and spin it (don't loose the copper washer).

Or it could be the fan has unscrewed from the motor. This has to be locked down tight with the lock nut (you say you had the motor in something else...).

[robgt]

It's a SCEADU 30

It sounds like your phsing is out a bit...
The phasing is adjustable on the sceadu
You need to loosen the washout guide (housing with two pins pointing down the side of the main shaft which the washout base and arms slide up and down) and turn it slightly on the shaft - then tighten it up in the right place to eliminate the phasing issue.
You can check and set the phasing by pointing the blades out to the sides of the heli - paddles front to back - then only use elevator movements on the transmitter and adjust the washout guide until the paddles don't rock side to side (get it as close as possible to zero movement).
Test with the blades front to back using the same method, but inputting only aileron instead.

I hope that helps
Cheers,
Rob

[robgt]

If the engine is flooding slightly when you shut it off, it could be a bit rich on the base needle. If you don't want to adjust that setting (if it's running nice) you could clip the fuel tube when it's still running to shut it off - this would clear out any fuel in the engine and it should start up again nicely next time.

Cheers,
Rob

[Ade_Law]

Helis are dangerous. It sounds from here that maybe it would be better to get to the local club and get some help. Its very easy for these to cost you alot of money even when you know whats going on so you could find yourself in a sticky situation with ever flying it.

[Carver]

The engine wasn't flooded. I unscrewed the plug to release any pressure but there wasn't any. Also I noted that the main blades were very stiff to turn by hand in the direction they should rotate in..!

Ade - If you read this I'd like to pop down and meet you for a heli M.O.T and lesson so could you PM me when convenient please? Cheers.

[Ade_Law]

It could be that than fan has unscewed from the engine and locked everything up. Sorry im not doing lessons any more. And im at a new club which is mainly fixed wing so not in a position to invite people down. Have you joined a club yet?

[Carver]

No i've not joined my local club yet because their club fees are the same whether you join them 1 month into their season or 11 months so i'm waiting until the new season starts which i think is January. Well this was the case the last time i spoke with them.

I've not had chance to drop my engine out yet but i would be very surprised if the locktite has let go of the fans screws. I'll post my findings once i've resolved the issue so other newbies can refer to this post.

[Ade_Law]

what happens is that if you dont screw the fan onto the engine really tight the first time you fly it it will tighten down fully. this loosens the locknut that locks the fan onto the crank.

next time you start it it will just wind the fan off of the engine. you should be able to see without dropping the engine out.

Ade

[moyesboy]

Hadn't tought of that aspect, the fan moves further ontothe motor and makes the nut you tightened so thoroughly, loose!