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Autography FlightPower . Advantage Hobby . Revolution Models

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Engines Plugs Mufflers Fuel > OS 91 SZ-H-PH-Hyper on 1% nitro.
 
 
J Kofoed
Senior Heliman
Location: Denmark

I am going to by an OS 91 SZ-H-PH-Hyper and run only 0-2% nitro and 12% Synth Glow oil.
Can I pleas have recommendations on:
Number of compressingrings?
Witch Glow plug?
Best running temperature? I have a Smart Cab.
Best rpm for max torque?
Best Hatori muffler?
Thanks.
06-24-2008 11:39 AM
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nivlek
Elite Veteran
Location: Norfolk England

Remove all of the shims . I now run all of my OS engines , aero and heli , with no shims . I use 10% nitro , but have run on straight .
If possible improve the helis cooling system , you may struggle to keep the engine temp down to 130 degrees C (the max temp of the carbsmart) .
Use a hot plug .

At the end of the day , it gets dark .
06-24-2008 03:25 PM
 
 
Rafael23cc
Key Veteran
Location: Junction City, KS

I'm not saying it can be done, after all it's your engine and I can't tell you what to do with it...

Here is a quote straight from the Manual:
Quote 
For the best throttle response, a
fuel containing 10% to 30% nitromethane is
preferable. Lubricants may be either castor-oil or a
suitable synthetic oil (or . a blend of both) provided
that they are always of top quality. For consistent
performance and long engine life, it is essential to use
fuel containing AT LEAST 18%
lubricant by volume.


So dropping the nitro content will produce sluggish throttle resonse, You could deal with that by programming the Carb Smart and/or governor. The one thing I would not do is go below 18% oil content. But that is my personal choice. I would never do that to my engine.

Rafael

Keep your feet on the ground, but your eyes on the sky.
06-24-2008 05:33 PM
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CarbonXtreme . Midland Helicopters . HeliProz

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Engines Plugs Mufflers Fuel > OS 91 SZ-H-PH-Hyper on 1% nitro.
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