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HomeAircraftHelicopterBeginners Corner › motors and bearings
02-11-2006 12:52 PM  12 years agoPost 21
fly-en

rrApprentice

Groveport, Ohio

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I received my new ceramic bearing today from RC Bearings. This would be my first time installing bearing in one of these engines (ys 91). To my surprise it was quite easy, although some people in my house found no humor in baking engine parts or the two heli taking up all the space on the kitchen table (you all know who). If you have never done this before please make sure you get the rear bearing in before the crankcase cools down. This would not have such an ordeal if I would not have installed the front bearing first. I don't believe you can heat ceramic bearings can you? Back to the point I got it put back to gather and started that tuning thing again (which I really suck at).
The ys ran good and quite. We will see in five tanks if the check list above will help.

I wish I knew how to post pic's because I would love to show you the rear bearing I took out. man did someone say muffler plugs might help?

fly en

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02-11-2006 01:52 PM  12 years agoPost 22
nivlek

rrProfessor

Norfolk England

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Is there a certain brand of fuel to help keep this from happing.
Any fuel that contains a small amount of castor oil will protect the bearings better than a straight synthetic . Many people won't use castor for other reasons , but you pay your money and you make your choice . For this reason , and a couple of others , I'll keep using a drop of castor .

At the end of the day , it gets dark .

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02-17-2006 11:24 AM  12 years agoPost 23
fly-en

rrApprentice

Groveport, Ohio

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Thanks Paul for taking the time out.

I just want to say, I got the bearings in the motor. Your first time your a little shaky cause you don't want to mess anything up. All I can say is I love those ceramic bearings. They are quite compared to the ones I took out. I'm new to this hobby, so I'm sitting here reading your posts. I just don't want the rust and will do anything to keep it out. Castor oil, after run, what ever!!

RC bearings help me out so much, I can’t thank them enough!!! to the rest keep up the post I'm learning everyday.

Fly en

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02-17-2006 11:46 AM  12 years agoPost 24
Yug

rrMaster

UK. Herts

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If you want to avoid rust, you need to make sure you never leave unburnt fuel in the engine. After a session, turn over engine until it wont start anymore, then leave piston at TDC. Also a good idea to leave tank hose disconnected to allow it to vent fresh air. The trouble with most systems is they are pressurised by the muffler which puts nitric acid in your fuel (among other nasties). This is not good for bearings, and a crank pressurised system avoids this like in the YS or cline modded systems.
I had over 300 flights in my 50 Hyper before it started doing tractor impressions using standard bearings, dang the dreaded microwelding

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02-17-2006 12:29 PM  12 years agoPost 25
MattJen

rrElite Veteran

UK

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Destert Sky

Thanks for the post, i do have to differ on on a couple of points,
I have found that the steel bearings are softer, so when as the engine wears and occasionally you may get a metal filing inside the engine or some other muck, where the steel bearing is rotating and the metal is softer it will compress any tiny particle cos the metal is softer, whereas a ceramic bearing wont cos it is as hard as rock,
it will cause damage or shatter, and i have seen one do that!

hence why i and a few other top f3C pilots do not fly with ceramics,

i did say in my post that it is my experince and opinion only as i have seen other pilots swear by ceramics and have had success.

I have gone the way i was recommended,

Matt

All The Best

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02-17-2006 01:15 PM  12 years agoPost 26
yote127

rrNovice

Brooklyn, MD USA

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Why use so much after run oil? I have been running car(completely different animal i understand) and airplane engines for a number of years and put 2-3 drops down the carb and if possible 2 in the cylinder and have never had a problem with bearings,or seals and a bottle seems to last forever, another product that works well is Marvel Mystery oil, i use that also if i forget my normal bottle of after run

Taking off is optional, landing is mandatory...

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02-17-2006 03:49 PM  12 years agoPost 27
MattJen

rrElite Veteran

UK

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Desrertsky

You obviosly did not read my post correctly, i dont want to argue about the merits of ceramics against steel,
I notice you work for a bearing company, so you obvisoly know your stuff, i dontlike ceramics and the pilots i fly with also dont like ceramics due to them being too hard and not forgiving.
I have personally watched a hellie engine destroy itself due a fragment entering the engine and the bearing shattering,
Now there could be a number of reasons, i am no engineer, but as soon as i saw that the set of ceramics i bought funnily enough from rc bearings i have never used, i have a YS91 in a 2000,00 machine, and i would not risk it.

as i said in my post I KNOW OTHERS THAT HAVE TRMENDOUS SUCCESS WITH CERMICS, BUT MY PERSONAL CHOICE IS NOT TO USE THEM,

hence the emphasis on personal choice, that was what i was posting, there was no need to get ratty with the comment
[quote]Not those who know someone who has a cousin who heard of a friend that it happened to. I can guarantee that MANY more people have had steel bearings fail. I only use ceramic bearings in my own engines.
I dont have to look at runryder to see how cermaics work, i know they are ok, i just have a different opinion of them, i would not use them,
I am sure you can garuntee, i fly wiith about 20 pilots and all wont use ceramics,so as i have learnt i have gone with the flow and recomendations, and when i did see a ceramic fail it made my mind up,but i am not against them as i know like you do others that swear by them.
i dont know how much flying you do, but i fly competitions in both scale and pod and boom, and as i said it was not a slag off of your berings, it was my personal opinion, which is what this forum is about

Matt

All The Best

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02-17-2006 03:54 PM  12 years agoPost 28
Yug

rrMaster

UK. Herts

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I wonder how the ceramic balls are made, and how consistent the material is ?

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02-17-2006 08:24 PM  12 years agoPost 29
fly-en

rrApprentice

Groveport, Ohio

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Now that we got that straight, how are those ceramic bearings made?

Fly en

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02-17-2006 08:47 PM  12 years agoPost 30
Yug

rrMaster

UK. Herts

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have to wait till paul comes back on line for that one

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