Author Topic: OS engines- .40/.46 FS/FSR (Read 2903 times)

Bill Little · « **on:** March 16, 2011, 02:07:50 PM »

HI Randy (and others!)

These engines did have a following (as Brett pointed out, about 30 years ago! LOL!!) but they might be useful to many people who are "moving up", and may not have a lot of bucks to spend on really good special purpose stunt engines.

With a LOT of these engines available (new and used), and some guys not really looking to have the hot "Top 5" set up, what are the differences between the FS/FSR engines, and what are good set ups for the "average" guy to use? Seems that they, like the ST .40/.46/.51./60, could serve a good purpose as a good stunt engine "on the cheap". Especially if one has an example already. (I know this might be a detailed explanation, but it seems it could be very useful)

Thanks!
Bill

Bill Barber · « **Reply #1 on:** March 16, 2011, 09:57:56 PM »

Bill in another thread I basically asked the same question , here is the link :

http://stunthanger.com/smf/index.php?topic=20527.0

cheers Bill

Bill Little · « **Reply #2 on:** March 16, 2011, 10:46:12 PM »

Quote from: Bill Barber on March 16, 2011, 09:57:56 PM

Bill in another thread I basically asked the same question , here is the link :

http://stunthanger.com/smf/index.php?topic=20527.0

cheers Bill

Hi Bill,

Thanks, Bill. I remember the thread, but it seems that it is directed more at your reworked/retimed engine. I was hoping to get a dedicated thread to the "stock" ones.

Bill

Brett Buck · « **Reply #3 on:** March 16, 2011, 10:52:12 PM »

Quote from: Bill Little on March 16, 2011, 10:46:12 PM

Thanks, Bill. I remember the thread, but it seems that it is directed more at your reworked/retimed engine. I was hoping to get a dedicated thread to the "stock" ones.

In order of likelihood of working, I would rank them thusly (most likely to least likely to get a satisfactory run on a stock engine):

46SF
45FSR
40SF
40FSR (although if you dig up a bunch of moldy magazines you might get some idea how to proceed)

I have a minimal amount of experience with the 46SF. Run it stock, ream the muffler outlet with a Fox prop reamer as big as it goes without removing the stinger, try about a .275 venturi with an ST needle. Run a typical 40-45 sized tuned pipe propellor (12-4, 11.5-4 3-blade, etc), start at about 10,000 ground revs. Adjust from there.

Brett

RandySmith · « **Reply #4 on:** March 16, 2011, 11:15:17 PM »

Quote from: Bill Little on March 16, 2011, 02:07:50 PM

HI Randy (and others!)

These engines did have a following (as Brett pointed out, about 30 years ago! LOL!!) but they might be useful to many people who are "moving up", and may not have a lot of bucks to spend on really good special purpose stunt engines.

With a LOT of these engines available (new and used), and some guys not really looking to have the hot "Top 5" set up, what are the differences between the FS/FSR engines, and what are good set ups for the "average" guy to use? Seems that they, like the ST .40/.46/.51./60, could serve a good purpose as a good stunt engine "on the cheap". Especially if one has an example already. (I know this might be a detailed explanation, but it seems it could be very useful)

Thanks!
Bill

Hi Bill

I have, over the years setup 100s of these motors for people, The best ones to buys are the OS 45 FSRs or Clones of that engine, such as the Magnum 45 and Royal 45, there are other, some even did 2 pice case FSR 46s.
The 46 SF is also one that can be made to run well and all of them are capable of ST60 power. I would recommend using these before considering any of the 40 FSRs although they can be good too, Stay away from the 40 SF as it is the least desirable of the lot. The motors respond very well to a very mild retime/reangle and there are several 100 of mine out there that are setup that way.
As you know you don't want to treat these like you would a ST 46 or typical single bypass motor and use a 6 pitch prop, under 5 is the way to go.

And by the way, many run these on pipes and KAZ did quite well with the ones I setup for him, They would still be right at home in the hands of a top 5 flyer using them in a lower pitch type setup and are still capable of winning most anything out there.

Also as Brett pointed out you can run them converted over to C/L BUT.. you must use lower pitch props and load the motors appropriately

Regards
Randy

Gary Anderson · « **Reply #5 on:** March 16, 2011, 11:57:59 PM »

Hi guys,
When you're talking about these engine, which one are you talking about??? The OS FS and FSR comes in a ABC and a ringed engine. Will the ring engine do as well as the ABC??? I have the OS 40 FSR ABC and love it, I also have the OS 46 FS ABC and love her also. I wouldn't be afraid to recommend the 40 FSR cause so far its the sweetest engine I have ever run, might change my mind if I ever get a run away?

I set it up the way Randy suggested and it starts very easy, runs great, doesn't use much fuel but she does like to turn the R's. I have the engine in a 60 size plane and so far she's pulling the plane without a problem. Like Brett told me don't purchase one but if ya can get it free or close to free I believe it beats the pants off of most the engine out there?? Maybe I just got lucky with the three OS 40 FSR that I own??? One was given to me, I bought another for thirty seven dollars and bought a mac's pipe system, complete for forty dollar and these engines beat the tar out of my ST 60?

Lots of power, just do what Randy tell ya and it'll work??? (Yes, they're stock engines, just a lot of wear??) (Don't tell anyone but if ya get a nva from Randy and if ya have a Evo 36 hanging around you can use the smallest Evo venturie and drill it out to .265 and it works great???)
Gary

Brett Buck · « **Reply #6 on:** March 17, 2011, 02:56:39 PM »

Quote from: RandySmith on March 16, 2011, 11:15:17 PM

The 46 SF is also one that can be made to run well and all of them are capable of ST60 power.

I was extremely impressed with the Randy 46SF, definitely puts out like an ST60. But we had some luck with Bill Howe's completely stock version, with the exception of the muffler and venturi. It hauled his 720 square inch Macchi 202 with no problem at all and ran like a huge 25FP.

Brett

Gary Anderson · « **Reply #7 on:** March 30, 2011, 11:32:02 PM »

Hi Brett, Randy,

Bill has asked about the 40's & 46's, how about the OS Max 60 FSR?? Is this engine to heavy, to big, any good, just curious, to much power??? Would this engine compare to the Ro Jett 61 or the PA 61??? I know I really love my OS Max 40 FSR and was thinking if the 60 ran the same way and wasn't to heavy, could be fun?? I would appreciate your input.

Gary

RandySmith · « **Reply #8 on:** March 31, 2011, 08:50:26 AM »

Quote from: Gary Anderson on March 30, 2011, 11:32:02 PM

Hi Brett, Randy,

Bill has asked about the 40's & 46's, how about the OS Max 60 FSR?? Is this engine to heavy, to big, any good, just curious, to much power??? Would this engine compare to the Ro Jett 61 or the PA 61??? I know I really love my OS Max 40 FSR and was thinking if the 60 ran the same way and wasn't to heavy, could be fun?? I would appreciate your input.

Gary

Hi Gary

It is a very heavy engine, you may want to get a lighter 61

Randy

Author Topic: OS engines- .40/.46 FS/FSR (Read 2903 times)

Bill Little

OS engines- .40/.46 FS/FSR

Bill Barber

Re: OS engines- .40/.46 FS/FSR

Bill Little

Re: OS engines- .40/.46 FS/FSR

Brett Buck

Re: OS engines- .40/.46 FS/FSR

RandySmith

Re: OS engines- .40/.46 FS/FSR

Gary Anderson

Re: OS engines- .40/.46 FS/FSR

Brett Buck

Re: OS engines- .40/.46 FS/FSR

Gary Anderson

Re: OS engines- .40/.46 FS/FSR

RandySmith

Re: OS engines- .40/.46 FS/FSR