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Engine basics => Engine set up tips => Topic started by: RDJeff on April 16, 2012, 11:00:38 PM

Title: O.S. Max .20?
Post by: RDJeff on April 16, 2012, 11:00:38 PM

I thought I was bidding on an FP .20, but it turned out to be an old baffle-piston version.  :-[ It seems to be in great condition, and is very light.  What can I expect with this one?

Title: Re: O.S. Max .20?
Post by: Bill Little on April 16, 2012, 11:16:54 PM

Hi Jeff,

It will be obviously less powerful.  Also, it will run in the 4-2 mode since it was part of the "S" series.  It will be good in a plane that was designed for the old .19 size engines.  Not a complete dog, but not up to the modern engines.  Definitely not as strong as a .20FP, but very usable in the right size model.

Kinda like comparing an OS .35S with an Aero Tiger .36.  The OS .35S is a great stunt engine, but no where near the power of the Aero tiger.

Bill

Title: Re: O.S. Max .20?
Post by: Clint Ormosen on April 17, 2012, 02:23:00 PM

The OS Max 20 was my first "big" engine. I used it for hundreds of flights on Jr Flite Streaks. It's a one flip starter and a good performer on a 9/4 prop. As stated, it's not as powerful as an FP20.