Yes, your right 100s of flights (15 min ea.), however, there will be some radial play at least on the engines I have. For lubrication there must be some room for the oil? My experience is that low viscosity oil wears more on the disc valve pin compared with higher viscosity oils. So there could be one reason for any differences; if any since we do not compare actual numbers. Same findings as for the disc valve pin on the wear of the cam on the pump side.
The figure shows the viscosity of the oil I am using compared with castor oil, very good experience with this oil, using 10%.
The thread heading start to become misleading, I would not class this as problems, but the EP guys probably enjoy it ;).
Arnstein
http://www.rcuniverse.com/forum/atta...mentid=2019027

Hi all,

My 170 cdi has just a tiny bit of play but runs pretty good .......around 200 flights doing the bearings so will do the pin as well ... love this engine.
They tell me the 185 cdi is even better.It seems that with YS the bigger the better

rgds

Mavros

Arnstein,

I don't have any issues with Electric F3A I think its good for competition to have various power plants ...I hope to see petrol engine soon or even a turbine power.
The only thing that disappoints me is that most manufacturers don't cater for the GP ......BAD BAD BUSSINESS.

rgds

Mavros

Mavros,

Neither do I, but I constantly get asked when I will convert to EP. My answer is: The day somebody manage to become a World Champion with EP I will consider it :D
As you state the problem will be to obtain good airframes for GP in the future.
The YS engines are not an issue, very reliable stuff.

regards,

Arnstein

Low viscosity definitely contributes to wear, but YS's don't like high viscosity oil. I work on the philosophy of "if it ain't broke, don't fix it". So with the engine running OK, I don't pull things apart. That's why I haven't noticed any excessive wear on the disc pin.
I use Cool Power MV @ 10%, which I'm very happy with and the engines run fine. The main wear I've found is is in the bearings. The rear bearing takes a real beating now with 20.5"+ props we're running. The bearings are the same as on the 140.
Normal wear and tear are not problems. The electric guys see you checking tappet clearances and they say you have a problem. Electrics have maintenance to do as well, but they think that's different.
If it makes the electric pilots happy, then that's OK.

Scott,

I can not agree more with your opinnion.

regards

Alejandro

GP is definitely a minority, but that's not to say they are gone. There are still manufacturers out there designing and supplying GP air frames. Bryan Hebert, Naruke, Nishiokaka and Aerocompet are a few.
I also get asked quite often when I'm going to convert to EP. I say if I do, It will be because of necessity, not choice. There are many fields now that are electric only only, even though some electric F3A models are noisier than GP. As you say Arnstein, EP have not won a worlds yet.
There are still many advantages for using GP, but the FAI schedules are definitely getting more EP friendly.

There are those that are experimenting successfully with petrol engines, but I don't really see them taking over from glow. As cool as it would be to have a turbo prop pattern ship, I don't know if the noise limit could be made. Weight and lack of down line braking are other issues that make it unsuitable.

So, go GP power and try to teach the electric guys the difference between maintenance and problems.

Yes, the 185cdi is the best YS so far.

Going by previous engines and a rear bearing failure, I will be replacing the 185 bearings at around 100 flights.

What about the YS185CDI ZERO?
It is a very interesting move by Yamada san, show the innovative power of YS.
What about the power of this ?

Arnstein

Morris Hobby Japan has the 185 CDI, M, and Zero posted. Can anyone translate the page?

EDIT: Not sure about the "M", but the "zero" is meant for 0% nitro.

Jim.

M means it comes the YS supermount installed.

Good to see you again man!!

Regards

Alejandro