RC-Bearings

My Feedback: (1)

Well, flyboy, I guess I'll get this post deleted as well.

My comments weren't meant to belittle you or anyone else. They were originally meant to be informative. You don't know what bearings are made of but you misquote a distributor. You don't know that there are two size versions of R6 bearings yet you pronounce that all of them are the same size. ONE bearing supplier uses a non-standard designator for their bearings (against industry standards). You call Stellite a "flashed chrome" surface finish on Japanese motorcycles when it is not used commonly on cams or followers. Industrial hard chrome plating us used there and valve faces are normally welded and machined.

Flyboy Dave

My Feedback: (21)

I personally removed all the flaming out of your post. That was uncalled for.
You are right, I didn't kmow that a plain R6 bearing was smaller in width than
all the other R6 bearings, and there are many. However, instead of jumping
up and down, why don't you study-up on that bearing book a bit more. It
appears you are no expert at bearings either, although bearings are your
business:

If you were to look in the bearing book instead of trying to find fault with
others, you will find plenty of bearings that have the .218 width, and are
sealed.

Oh, look....here's five from Boca Bearing. They must have a better selection
than you do.

P.N. ENK-037HP
Bearing R6N-2RU TH9/C3
Width .2187
Seals (2) Double rubber.

http://www.bocabearings.com/main1.as...N-2RU%20TH9/C3
__________________________________________________ ________
P.N. ENK-037
Bearing R6N-ZZ
Width .2187
Shield Double/steel

http://www.bocabearings.com/main1.as...=1901&n=R6N-ZZ
__________________________________________________
P.N. ENK-037C-LP
Bearing SR6CN-2YS/C3
Width .2187
Two seals, material YS rubber, contact seals.

http://www.bocabearings.com/main1.as...n=SR6CN-2YS/C3
__________________________________________________ ___

P.N. ENK-037C-HP
Bearing R6NC-2RU-TH9/C3
Width .2187
Ceramic Hybrid
Rubber seals
http://www.bocabearings.com/main1.as...C-2RU%20TH9/C3
__________________________________________________ ___

P.N. ENK-037HS
Bearing RN6-Z TH9/C3
Width .2187
Shield single/metal
http://www.bocabearings.com/main1.as...R6N-Z%20TH9/C3
__________________________________________________ ________

More bad news....Stellite surfacing is used on every camshaft and follower the
Yamaha ever produced, going back to 1970, with their first four stroke offering
the 650 XS1. I was working for Yamaha full time, at the time....I know.

BTW, I offered the same advice you did about the front bearing. I asked the Member
to measure for the front bearing, and added a picture to show him how.

I hope you will continue to enjoy R/C Universe, I see you are new. [sm=thumbup.gif]

FBD.

RC-Bearings

My Feedback: (1)

Dave,

IF you would bother to read my posts, you would have seen this: . I DO know a little about what I speak.

Again, stick to what you know about because bearings isn't one of them.

Oh, and Yamaha is just a bit player. Honda and Suzuki use proprietary hard facing on their bikes and Kawasaki uses plain old ordinary hard chrome. We are having this discussion right now on another site I frequent where industry insiders answer.

Hobbsy

My Feedback: (102)

OK Guys, you two *****ing each other out over totally unrelated motorcycle issues is not helping Jerrbl at all. Just tell him which bearing will solve his problem, that's all he wants to know.

RC-Bearings

My Feedback: (1)

What he needs to know is in several posts already. He needs to cure the CAUSE, not treat the SYMPTOMS. If leakage is a major problem, then the crankcase and crankshaft are worn excessively. He can either fix the problem with a new crankcase and crankshaft or put a bandaid on it with a sealed front bearing. Given the fact that it takes a bearing that is not commonly sealed, he may have to live with the prospect of reduced bearing life if he goes that route.

DarZeelon

Paul,


WELL PUT!

I have been saying this all along, in several threads in the past.

Flyboy Dave

My Feedback: (21)

More often than not, the cost of replacing the crankcase and the crankshaft
would be probibitive. Unless the crancase is broken from a crash and not
serviceable the answer to the leaking problem is to use a sealed bearing.

Sometimes even a single sided metal shield bearing will suffice. After all, the
object is to restore proper operation of the engine, not spend a hundred
dollars on it, when it doesn't need anything but a new improved bearing
that effectively cures the leak and fixes the problem.

The problem with open ball bearings is they, for he most part, work OK when
the engine is new. They leak air and fuel like mad, but the engine can be
richened up enough to compensate.

However, when a manufacturer uses the cheap bearings, and you get a little
wear....the engine starts running like poop, or will not run at all, will not idle, or
will not shut off.

In any case, a new rubber sealed bearing will indeed fix the problem, and last
for many, many years. Use a sealed .218 bearing, or if the .280 sealed bearing
will fit....use that. The crank and case do not have to be replaced.

Super Tiger engines come with rubber seals.
ASP engines come with rubber seals.
Flyboy Dave's rebuilds have rubber seals.

Is this a great hobby, or what ?

Flyboy Dave

My Feedback: (21)

Jerrybl....I forgot to mention, if you were to replace the crankshaft, the crankcase
and use a new cheap bearing like the engine came with....guess what ?

In a short period of time you will have an engine that does the same thing yours
is doing now.

Put a nice rubber sealed bearing in the front and enjoy.

FBD.

MrMotor

Also keep in mind that black head engine is over 30 years old. I know Webra engines last almost forever, but is it even worth the price of a rebuild. My guess is it's probably on it's 3rd or 4th set of bearings and was run too long on one of the worn out sets destroying the seal. Normally the steel shaft does not wear and it is only the front case part that wears out.

Flyboy Dave

My Feedback: (21)

Yes, Paul....the engine could be old, or it could have been sitting around for
decades. If the front of the case is worn, you can install a new bearing with
thick CA. It will hold and seal the outer race forever.

Ten years from now, when the bearing might need replacement....heat the case
front with a propane torch for a few seconds, the CA will soften....and the bearing
can be bumped right out.

Real simple. [sm=thumbup.gif]

FBD.

Hobbsy

My Feedback: (102)

Paul since we're kinda talking about your bearings, I ran my Fox .50 today that I rebuilt about a year ago using your ceramic bearings and a new sleeve, piston and ring. I removed the front seal as Fox doesn't use front seals. Sorry Dave, I was impressed. It turned a 12x5 Graupner at 11,820 peaked but only for about 10 seconds, needs some more time on it. Even with a smallish .247 Perry carb it did good, I think. I need to figure out how to get my camera to take good Tachometer pics.

I may be able to scrounge a crankcase for Jerry, it may take a day or two if I can find it at all..

DarZeelon

Dave,


This may be off-subject, but that Perry carburettor is on the Fox with an adapter.

I heard Fox has a carburettor they call the 2600, which is the best thing for this engine since the venturi was invented...
...And it bolts right onto the crankcase.


BTW, is that an MVVS, or a Webra 390 in that Galaxy?

RC-Bearings

My Feedback: (1)

Torque,

That is pretty impressive for an engine design that is at least 20 years old! I don't think you will get much more out of it with a larger carb as the 50 never really did turn a lot of revs compared to the 40s and 45s.

Sport_Pilot

Must not have been that good, they discontinued that carb. Hopefully they at least got rid of problems on their metered air bleed carb.

Sport_Pilot

Does 12,800 on a MA 11-6 with 15% nitro qualify as a lot of revs? Don't know where you got that info. I think Fox advertised something in the upper 14's with 5% nitro and a 10-6 prop at one time, which is about the same as the present .46 ABC. Flew my Big Stick .40 fast enough to rip a corner of the covering off, the adhesive was still stuck to the balsa. Climbs straight up with an APC 11-5. Forgot to tach it though.

RC-Bearings

My Feedback: (1)

I got that info from owning 4-5 Fox engines in that size range including 2 of the 50s. They were always happier with the larger props. The .40 Q-Sport would always out run it with smaller props. Also remember that his engine is newly rebuilt and not broken in yet.

Also, I don't consider MA props for comparisons. They always showed higher static RPMs than APC. Any time I wanted to impress someone, I would put an MA 10X6 on the 47 and spin it up to 16k!

Just for comparison, the current GMS .47 turns an APC 11X6 over 13K on 5% nitro.

RaceCity

Dar..

The Fox 2600 carb fits only the .40 Std or BB engines...there is no "2600" for the other models.

Sport..

You obviously never used a 2600 carb? It is definitely one of the finest (albeit Fox ugly) carbs ever made.

DarZeelon

Curt,


No I did not.
Nor did I ever actually own a Fox engine.

But I did get a chance to play with a couple of them that showed up here.

Your opinion of this carburettor is why I entered my previous post.

speedster 1919

My Feedback: (3)

Hey Torque That FOX 50 must be sentimental. New sleave,piston,ring,and ceramic bearings no less. More than engine is worth !!!! Lots of OEM engine bearings are open (no seal) from factory. I'm with Dave , Put in the rubber seal (not metalseal) and go fly. The seal will help air leak and dust protection. I'm surprised the slide rule boys didn't attack on the .218 reference bearing you stated at .2187. That .0007 could get you in trouble...........

Hobbsy

My Feedback: (102)

Hey Speeds, I have 3 of the .50s, 2 factory made ones and one I made by putting a .50 sleeve and piston in a .46, this lightens the .46 by about an ounce, the power between the .46 and the .50 is identical though. Bob Davis has been trying to get Charles Thacker at Fox make another run of .50s but so far that hasen't happened. The Fox .50 is one of the best kept secrets in this hobby.

Flyboy Dave

My Feedback: (21)

Did we switch over to talking about the Fox 50 ?

Hobbsy

My Feedback: (102)

Seems like we did, I may have a crankcase and crankshaft for Jerry, I haven't got a chance to look yet.

Sport_Pilot

I was only offering a possibility of why Fox discontinued this carb. I have never used it. Don't know if it is better. Correcting the metering of the air bleed carbs may be just as good.

Hobbsy

My Feedback: (102)

Jerry, I found this guy in my "stuff", I paid two bucks for this engine and used the needle bearing rod that was in it. Shoot me an address by PM if interested, it's on the house if it will help. It has been victimized by "pliarboy mechanic" but is usable.

Jerrybl

Thanks to all