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Engine basics => Engine set up tips => Topic started by: Manuel Cortes on November 28, 2010, 01:17:51 AM

Title: OS MAX 50, good for stunt use??
Post by: Manuel Cortes on November 28, 2010, 01:17:51 AM
Hi all, interested in knowing about the OS Max 50 (ringed baffled piston, ball bearings shaft, circa 1965) and how it works for stunt use, and the setup to make them work.

It seems to be the big prother of the beloved Max 35-s......

Kind regards from Spain. H^^

Manuel
Title: Re: OS MAX 50, good for stunt use??
Post by: Gary Anderson on November 28, 2010, 09:52:44 AM
Hi Manuel,
I have a OS 50 FSR Ringed and it runs very nice but I haven't installed it in any of my planes. The one I have doesn't seem to have as much power as my OS 40 FSR but has a nice 4/2/4 break. If ya play with it let me know how it works out for ya.

Best Regards
Gary
Title: Re: OS MAX 50, good for stunt use??
Post by: Manuel Cortes on November 28, 2010, 11:09:08 PM
Thanks very much Gary, IŽll keep you all posted.

Accidentally IŽve descovered that my unit (second hand but unused) is a Bowman reworked one.....great news!!!

Regards.

Manuel
Title: Re: OS MAX 50, good for stunt use??
Post by: Jimmy R. Jacobs on November 29, 2010, 07:06:13 AM
  The engine I have is same as yours also rebuilt or rework. But is not much for power and has very little 4-2-4 break , hope yours works better.


                                                  Jimmy Jacobs
Title: Re: OS MAX 50, good for stunt use??
Post by: RandySmith on November 29, 2010, 09:39:03 PM
Quote from: Manuel Cortes on November 28, 2010, 01:17:51 AM
Hi all, interested in knowing about the OS Max 50 (ringed baffled piston, ball bearings shaft, circa 1965) and how it works for stunt use, and the setup to make them work.

It seems to be the big prother of the beloved Max 35-s......

Kind regards from Spain. H^^

Manuel

There was a guy here many years back that used that motor in a Shark 45, it pulled it very easy and had a nice 4/2 break. It was a stock OS old style 50..not the FSR 50

Randy
Title: Re: OS MAX 50, good for stunt use??
Post by: Manuel Cortes on November 29, 2010, 11:04:48 PM
Thanks very much for your imputs, IŽll keep you posted as soon as I test the engine.

Regards from Spain.

Manuel.
Title: Re: OS MAX 50, good for stunt use??
Post by: M Spencer on December 02, 2010, 01:56:48 AM
Kim Webby's Cap 21 in flying Models had a OS max 50 .
Title: Re: OS MAX 50, good for stunt use??
Post by: Bill Little on December 02, 2010, 10:36:26 AM
Hi Maneul,

Randy Smith has a lot more knowledge of these than I do, but it seems that all the "S" series OS Max engines were along similar lines regarding timing and all.  Even the little OS .10S will 4-2! LL~  But power, as we describe it today, is down to the modern stuff.  Still, they seem to power an appropriate size model just fine.

Big Bear