Cox Engines Forum
You are not logged in! Please login or register! Guests are limited to posting in the "General Questions (Guest Posting Allowed)" section only. Becoming a member is fast, easy and FREE!


OS MAX-40F-SR STUNT Babe_b10
Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Cox Engine of The Month
June-2020
Kim's

"Double Your Pleasure" Two .020 Tee Dees and Their New Tanks"



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


OS MAX-40F-SR STUNT Empty

OS MAX-40F-SR STUNT

Go down

OS MAX-40F-SR STUNT Empty OS MAX-40F-SR STUNT

Post  ian1954 on Thu Dec 01, 2016 2:48 pm

The crankcase on this is strange. It is in two parts and the front end is bulky with very little webbing.

OS MAX-40F-SR STUNT Os_max12
ian1954
ian1954
Diamond Member
Diamond Member

Posts : 2682
Join date : 2011-11-16
Age : 65
Location : England

Back to top Go down

OS MAX-40F-SR STUNT Empty Re: OS MAX-40F-SR STUNT

Post  GallopingGhostler on Thu Dec 01, 2016 2:59 pm

Design is as such so ball bearings could be fitted easily?
GallopingGhostler
GallopingGhostler
Diamond Member
Diamond Member

Posts : 2335
Join date : 2013-07-13
Age : 66
Location : Clovis, New Mexico

Back to top Go down

OS MAX-40F-SR STUNT Empty Re: OS MAX-40F-SR STUNT

Post  Ken Cook on Thu Dec 01, 2016 3:28 pm

I'd be very curious to see that engine stunt. I know it came in different versions such as ringed and ABC. I would also like to add, they were extremely well made and no pennies pinched.
Ken Cook
Ken Cook
Top Poster
Top Poster

Posts : 3929
Join date : 2012-03-27
Location : pennsylvania

Back to top Go down

OS MAX-40F-SR STUNT Empty Re: OS MAX-40F-SR STUNT

Post  GallopingGhostler on Thu Dec 01, 2016 3:47 pm

It's a nice looking engine, no doubt it would be a good runner.
GallopingGhostler
GallopingGhostler
Diamond Member
Diamond Member

Posts : 2335
Join date : 2013-07-13
Age : 66
Location : Clovis, New Mexico

Back to top Go down

OS MAX-40F-SR STUNT Empty Re: OS MAX-40F-SR STUNT

Post  Mark Boesen on Thu Dec 01, 2016 4:52 pm

These were the 'Chevy small block' of .40 R/C engines in the 80's-90's, well made, easy to needle and great power. The FSR series was copied by Thunder Tiger (Magnum) and sold by the thousands. But for a U/C engine not so much, they would be on the heavy side and unless you did some major re-porting you'd need to run it in a two-stoke mode with a big diameter, small pitch prop.
I'd guess and say it was a cost/production thing with the two piece case. Later O.S. engines went to a one piece and i remember claims of RPM gains by the one piece case being more rigid? I planted a .40 FSR one time and was able to replace the front end only (with a Magnum part) and save the engine.
Mark Boesen
Mark Boesen
Top Poster
Top Poster

Posts : 3866
Join date : 2011-09-01
Age : 61
Location : Rockford, Il

http://groups.yahoo.com/group/049Collectors/

Back to top Go down

OS MAX-40F-SR STUNT Empty Re: OS MAX-40F-SR STUNT

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum