BillS

Old OS Max 45 F with removable front housing. Anyone have a ring that I can purchase? The engine is down on compression but otherwise OK. I want to run the engine backwards in a pusher application otherwise another engine could be used. Does Bowman make rings for the smaller engines?

Thanks.

Bill

Forgot to ask if a ring from another manufacturer might work? Bore is 21.79 mm.

Flyboy Dave

My Feedback: (21)

Bowman can make you one in a jiffy. There are probably some OS rings Laying around
hobbt shops. Do you have the part number ?

rainedave

My Feedback: (1)

In the last list Frank Bowman emailed me, he had these OS rings in stock:

OS .20 FS 4C, .26 4C, .28 FH Dykes (pin), .32 (pin), .37 H (pin),.40 H Dykes & Standard, .40 H (P) Pylon, .40 FS 4C, .40 SR (pin), .807 bore, .40 FSR 835 Bore, .40SR Dykes, .45 (pin), .45 Dykes (pin),

45 RSR Dykes, .46 Dykes (pin), .46FX (pin), .46SF (pin), .48 Surpass, Max 50 old, .50 FSR Dykes (pin) ,.50 H (pin), .50 SX & SXH (pin), Surpass .52 4C, .58, Max-H .60 FGR .60 4C, .60FSR (pin) .9445 Bore - older or SF.9055 Bore, .61 FS 4C, .61 SX & SXH (pin), .65 (pin), .70 & .75 Surpass, .80 H,.80 Dykes (pin), .90 & .91 4C, .90 & .91 Glow, .91 FX (pin), .91 SX H (pin), 1.08 (pin), 120 4C, 120 AX(pin),160 FX (pin), BGX-1 3500 (pin)

Frank Bowman

1211 N Allen Ave. Farmington, N.M. 87401-3568

ringmaster46 "at" msn.com

BillS

Don't have a part number and the OS web site doesn't even list the engine in the obsolete section.

Bill

Flyboy Dave

My Feedback: (21)

I know where to find it (I think), I'll go look. I would go for an OS replacement part first.

FBD.

BillS

Thanks for the information on how to reach Bowman.

Bill

Flyboy Dave

My Feedback: (21)

.....'yer right....what happened to the .45 ???

http://www.osengines.com/parts/discontinued.html

I believe it has a Dykes ring. I am running a .45 fsr at the present. Those engines don't have
a lot of compression at rest. If the engines idles correctly, and runs good, the ring is probably
in good shape. I haven't thought about getting a spare ring for mine, but it might not be too bad
of an idea. I searched, and found nothing. []

BillS

The engine has a conventional ring. I have other engines with Dykes rings and understand low compression at cranking speeds. The piston and ring has been cooking all day in antifreeze hoping it will free up.

Bill

Flyboy Dave

My Feedback: (21)

....good deal, I hope it will free up. I searched for about an hour and couldn't find a ring for sale. []

FBD.

BillS

Thanks. I have written Frank Bowman. It's been over 30 years since I last broke a ring but this one is hard to find so ... Well you know how Murphy's law works.

Bill

rainedave

My Feedback: (1)

You can send your piston and sleeve to Frank and he will make a ring if necessary. He will also install it and hone the sleeve for you. What will we do when he stops providing his services?[]

David

Flyboy Dave

My Feedback: (21)

....we'll be putting them up on the shelf to look at, and buy new engines. []

BillS

Dave,

I receive an email from Frank Bowman indicating he had the ring and that it was OS 45H. Monday I will order the ring.

Thanks for your help.

Bill

Flyboy Dave

My Feedback: (21)

....good news, Bill. [sm=thumbup.gif]

That engine is worth keeping in good shape.

rainedave

My Feedback: (1)

Bill, glad I could pass along the info. Someone here, probably FBD, passed it on to me a while back which was a great help.

David

Milcent

Hello,

i received from a person a plane with an OS 45 F. I am putting this engine back in good shape but the ring is broken. I have found your thread in this forum, hopefully. Could tell me how to contact Frank Bowman as i would like to order him a ring from my engine.
Thanks a lot for your help, i didn't find here in France any supplier that could do this.

Pierre.

blw

My Feedback: (3)

Pierre,

[email protected]

(505) 327-0696 (6pm to 9pm mst weekdays)

Milcent

Thanks a lot.

Pierre.

NM2K

My Feedback: (14)

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Or someone younger will take his place. Bowman is a wizard, but we do have young wizards in training, you know. <G>


Ed Cregger

Flyboy Dave

My Feedback: (21)

....hopefully you are correct, Ed.....

BillS

I received the ring from Frank Bowman today along with a ring for another engine. It was a pleasure doing business with Mr. Bowman.

Frank C. Bowman
1211 N. Allen Ave.
Farmington N. M. 87401-3568
[email protected]

Bill