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HelicopterEngines Plugs Mufflers Fuel › Question about FAI fuel...
09-03-2009 04:31 AM  8 years agoPost 1
Betofazzo

rrVeteran

Venezuela

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Hello to all.., anyone try fai (0% nitro) fuel with OS 50sx-h engine (trex 600)??..thanks.

Finally I have a Turbine heli.. :) Mobb Powercat !!

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09-03-2009 05:01 AM  8 years agoPost 2
Dr.Ben

rrMaster

Richmond, VA, USA

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Be prepared for very narrow needle settings and markedly reduced power. Carburetors design to run an low or no nitro fuel use different metering and needle valve tapers to allow for fine tuning of this kind of fuel. Cylinder head design and deck height are different as well. When you try running FAI fuel in an engine designed around at least a modest amount of nitro, a click or two one way or the other can mean the difference between too rich or too lean. One thing you do have going for you here is that the cooling system in a 600, esp with one of the aftermarket fans, is quite good.

I'd try to source at least some 10% nitro for this engine choice. Now, if you want to consider one of the European engines designed to work on low nitro fuel, that's another matter entirely.

Ben Minor

Team Synergy Team Futaba Team Kontronik USA
Progressive RC

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09-03-2009 05:08 AM  8 years agoPost 3
Dood

rrProfessor

Wescanson

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What is the benefit of putting low nitro fuel in an FAI machine?

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09-03-2009 05:54 AM  8 years agoPost 4
Betofazzo

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Venezuela

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Thanks Dr.Ben for this info..Really appreciate..Regards..

Finally I have a Turbine heli.. :) Mobb Powercat !!

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09-03-2009 06:30 AM  8 years agoPost 5
jschenck

rrProfessor

La Vista, NE.

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What is the benefit of putting low nitro fuel in an FAI machine?
I think this is a nomenclature hold over from old FAI rules, maybe related to free flight or CL. FAI fuel = 0% nitro.
http://simple.wikipedia.org/wiki/Glow_fuel

The only advantage today is in locations where getting nitro is very expensive.

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09-03-2009 10:30 AM  8 years agoPost 6
DS 8717

rrProfessor

Here wishing i was somewhere else

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FAI fuel used in FAI competition is supplied by the contest.It is 80 methenol and 20 castor oil. Just because it has no nitro doesnt mean its FAI fuel,it is just no nitro fuel.

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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09-03-2009 01:30 PM  8 years agoPost 7
ErichF

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Sutton, NH

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FAI fuel used in FAI competition is supplied by the contest.It is 80 methenol and 20 castor oil.
To be clear, this is not the case in FAI helicopter contests, including the Worlds.

Erich

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09-03-2009 02:34 PM  8 years agoPost 8
DS 8717

rrProfessor

Here wishing i was somewhere else

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How is it done with helis.In the events i have flown they suppy the fuel.Is the worlds flown by FAI rules or F3C.Using FAI fuel for their events makes it more equal and takes the fuel out of the contest,especially with pylon racing and control line speed.

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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09-03-2009 03:10 PM  8 years agoPost 9
ErichF

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Sutton, NH

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Unlike many FAI events, such as pylon racing, heli contests are not intended to be any form of "one-design" contest. While there are rules on maximum engine size, airframe weight, disc area, etc, there are no rules governing how a head is built or controlled, engine type, muffler spec, fuel type, or airframe configuration.

Part of heli competition is mechanical, which occurs constantly before, during, and after the actual contest.

The Worlds is flown by the FAI rules for F3C. F3C is the rc helicopter designation for FAI...as is F3A (Airplanes).

As for fuel, teams arrange for their fuel of choice.

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09-03-2009 04:25 PM  8 years agoPost 10
DS 8717

rrProfessor

Here wishing i was somewhere else

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I looked at the heli FAI rules and there is no restriction on fuel.I can see why,trying to run 20% castor oil in a heli wouldnt work.But my point is FAI fuel is 80% methanol and 20% castor oil.

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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