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Old 04-02-2019, 06:53 AM
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Originally Posted by FlyerInOKC
OK I have been watching a Greek build an 1/4 scale version of one of my plane projects on YouTube for a while. In the latest installment you get to see what engine he selected. I thought you guys might like to see. Skip to about 23 secs. will show the engine. My 1/5th scale will require me to scare up a Saito .91 or 1.00.

.Ryan SC Build Episode 25
Be sure to skip to the end and check out the custom hardware he build to hold the prop.
Old 04-02-2019, 07:20 AM
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Originally Posted by FlyerInOKC
I'm sure you are not the only one feeling that way. I wonder how many guys are making up a bogus FAA number and putting it on all their airplanes so the locals got a number to look at? I haven't heard a database they can run the numbers through to check them. I think the FAA number is more for the appearance of doing something then doing something worthwhile.
Chief flight instructor at our club so I will still get a little stick time. Nothing like the 10 hour days of near solid flying I often had though. Still, enjoy building planes so I can do that. Still get plenty of engine work too. Problem is so many newbies flying dust buster foamies and electrics. Soon even instructing may lose its satisfaction as well.

Build, build build !

BTW, I did enjoy the video link. Sure beats buying off the shelf!

Last edited by Jesse Open; 04-02-2019 at 07:34 AM.
Old 04-02-2019, 07:49 AM
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Originally Posted by Jesse Open



Wow! That is a work of art! Iíd like to have a lathe someday. Of course, I need to know how to use one first. 😆
Old 04-02-2019, 09:10 AM
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Originally Posted by FlyerInOKC
My 1/5th scale will require me to scare up a Saito .91 or 1.00.
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Look for an FA-115, it fits the same footprint as the FA-91S, FA-80 and FA-65. ( 2-stroke 60 size mount) And, it is only 2mm taller and 1mm longer than the FA-91S. More power than the FA-100 too.

FA-100 is an oddball size. Much taller, (7mm) than the FA-115 and requires a wider mount.

The only proprietary parts are the crank and the piston. Everything else is common with other engines.

Last edited by SrTelemaster150; 04-02-2019 at 09:15 AM.
Old 04-02-2019, 09:57 AM
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So I just installed a new set of rc bearings in my Saito 72 and there is a little slop in the main bearing. I can hear it. I wiggle the crankshaft from the front and it sounds like itís coming from the main bearing. My gut tells me this is unacceptable. Should I order some higher quality boca bearings or go with what I have? Thoughts?
Old 04-02-2019, 10:00 AM
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Originally Posted by Quikturn
So I just installed a new set of rc bearings in my Saito 72 and there is a little slop in the main bearing. I can hear it. I wiggle the crankshaft from the front and it sounds like itís coming from the main bearing. My gut tells me this is unacceptable. Should I order some higher quality boca bearings or go with what I have? Thoughts?

That is the very reason I don't use RCBearings, I ordered a set about 15 years ago or so for my friends Webra SilverLine 61 and I think the new ones were looser than ones I removed. Never again did I do that.

Boca Bearings for me only.
Old 04-02-2019, 10:04 AM
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Them sure some purty injins.
Old 04-02-2019, 10:05 AM
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Originally Posted by Quikturn
So I just installed a new set of rc bearings in my Saito 72 and there is a little slop in the main bearing. I can hear it. I wiggle the crankshaft from the front and it sounds like itís coming from the main bearing. My gut tells me this is unacceptable. Should I order some higher quality boca bearings or go with what I have? Thoughts?
What level did you buy and from whom?
I got some from an eBay seller that were horrible. Tossed them all but did get a full refund.
Old 04-02-2019, 10:07 AM
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Originally Posted by acdii


Them sure some purty injins.
You HOT DOG! Good on ya.


Last edited by Jesse Open; 04-02-2019 at 10:14 AM.
Old 04-02-2019, 10:18 AM
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Originally Posted by SrTelemaster150
Look for an FA-115, it fits the same footprint as the FA-91S, FA-80 and FA-65. ( 2-stroke 60 size mount) And, it is only 2mm taller and 1mm longer than the FA-91S. More power than the FA-100 too.

FA-100 is an oddball size. Much taller, (7mm) than the FA-115 and requires a wider mount.

The only proprietary parts are the crank and the piston. Everything else is common with other engines.
That sounds like a good idea. I'm nowhere near needing the power plant so I'll have time to look.
Old 04-02-2019, 10:19 AM
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Time to build an engine stand to get these babies broken in. They are a perfect for for the B-25, just need to get some props for them.
Old 04-02-2019, 10:26 AM
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Originally Posted by Jesse Open
What level did you buy and from whom?
I got some from an eBay seller that were horrible. Tossed them all but did get a full refund.
Well...I bought the high speed version off of eBay. 🙁

The seller said he was a rc bearings distributer. Basically, theyíre crap.

I just found a Boca 6902RS in my stash thatís that same size as the main bearing. Itís a sealed bearing so Iíll pry off both seals and install it. The front bearing seems ok to me.
Old 04-02-2019, 01:07 PM
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Wow,

I will let him know he just got a very bad review!
Never had a problem with the bearings or the service. I always assess clearances before installing new bearings.

Still buy most bearings locally in name brand boxes. Some folks don't want to pay that price though
Old 04-02-2019, 01:07 PM
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Originally Posted by Hobbsy
That is the very reason I don't use RCBearings, I ordered a set about 15 years ago or so for my friends Webra SilverLine 61 and I think the new ones were looser than ones I removed. Never again did I do that.

Boca Bearings for me only.
I'm having trouble with two new sets of RC bearings. One new front for my 82 leaked severely and Paul replaced it. The new one is barely better. A new rear bearing on a 62 has slop in it after only 10 tanks of fuel. I'm convinced that RC bearings aren't what they used to be a few years ago; those I have never had a problem with. Now today I'm hearing whirling noises from the 82 when flipping the prop. Looks the the 82 rear is going bad already!! I have never had a problem with the Bocas I have used. Hmmmm, I guess if the bocas are still good these days I'll start buying from them.

So Gary, make that three bad reviews. Tell Paul whatever you like. He can come here and tell me how full of #$%^ I am but I'm tired of tearing down engines to replace bearings after 10 tanks of fuel.

Last edited by Glowgeek; 04-02-2019 at 01:17 PM.
Old 04-02-2019, 01:44 PM
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Well I donít mean to bad mouth anyone. Not sure if the eBay seller is Paul or not but he did respond to my question and shipped my bearings promptly. I canít complain about the service but the product is not good quality.

I guess Iíll stick with Boca from here on out.
Old 04-02-2019, 01:49 PM
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Originally Posted by Quikturn
Well I donít mean to bad mouth anyone. Not sure if the eBay seller is Paul or not but he did respond to my question and shipped my bearings promptly. I canít complain about the service but the product is not good quality.

I guess Iíll stick with Boca from here on out.
Most the time Paul is quick to respond. He forgot about me for 3 weeks after multiple emails one time but everyone can forget from time to time. No bad marks for customer service for me. I dont bad mouth people either, just products or customer service.
Old 04-02-2019, 01:53 PM
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One thing I didnít mention before is that the inner race on the new main bearing seems to be slightly narrower as well. The reason I say that is when I put the bearing on the crankshaft the outer race would rub on the counterweight. The original bearing wouldnít do that. Also, in the picture you may notice the inner race is a littler thinner than the original bearing.
Old 04-02-2019, 03:45 PM
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Seams a bit tight, not sure yet what I will do



Old 04-02-2019, 04:51 PM
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Originally Posted by Quikturn
One thing I didnít mention before is that the inner race on the new main bearing seems to be slightly narrower as well. The reason I say that is when I put the bearing on the crankshaft the outer race would rub on the counterweight. The original bearing wouldnít do that. Also, in the picture you may notice the inner race is a littler thinner than the original bearing.
Yeah, that's a no go. I'll be checking for that when I tear down my 82 for the bearing change. Thanks for the heads up.
Old 04-02-2019, 04:54 PM
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Originally Posted by acdii
Seams a bit tight, not sure yet what I will do.
Gorgeous engine acdii! What's tight, the muffler clearance? Use a 90į adaptor maybe.

Last edited by Glowgeek; 04-02-2019 at 04:57 PM.
Old 04-02-2019, 05:01 PM
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I'm thinking I might make an exhaust ring with dual outlets for this. The trick will be the fitting to the cylinder.
Old 04-02-2019, 05:08 PM
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What trick do you need? Flanged pipe and nut? An elbow or tee?
Old 04-02-2019, 06:28 PM
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No more cheap bearings for me. Itíll be OEM or Boca from here on out. Lesson learned.


Old 04-02-2019, 07:15 PM
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Originally Posted by Jesse Open
What trick do you need? Flanged pipe and nut? An elbow or tee?
Wont know until I get it mounted to the nacelle and fit the cowl.
Old 04-02-2019, 07:17 PM
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Originally Posted by Quikturn

One thing I didnít mention before is that the inner race on the new main bearing seems to be slightly narrower as well. The reason I say that is when I put the bearing on the crankshaft the outer race would rub on the counterweight. The original bearing wouldnít do that. Also, in the picture you may notice the inner race is a littler thinner than the original bearing.
If the inner races are not the same thickness as the originals, that is why your crankshaft has play. The shaft is not able to draw down on the bearings resulting in end play and that allows the shaft to move about.

They aren't necessarily junk bearings, thay are the wrong bearings.

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