os 91 alternative fuels
09-04-2003, 11:07 PM
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os 91 alternative fuels
Hi folks. Just ordered a starfire and an os91. I know most of you use wildcat jet fuel in this motor, but unfortunately this isn't easily available where I live.
Can byron 5-10% fuel with 20% oil be used, if I add some castor or additional lubricant?
What about Fox 5% fuel (20%oil, half castor, half synthetic)?
Any other thoughts?
Oh, another question. Are futaba 9202 servos adequate? I'm sure that the latest digital servos are preferable, but folks did fly jets before these existed...
Can byron 5-10% fuel with 20% oil be used, if I add some castor or additional lubricant?
What about Fox 5% fuel (20%oil, half castor, half synthetic)?
Any other thoughts?
Oh, another question. Are futaba 9202 servos adequate? I'm sure that the latest digital servos are preferable, but folks did fly jets before these existed...
09-05-2003, 12:34 AM
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OS 91 Fuel
I have found that any "sport fuel" with 5-10% nitro works well if you will add a generous one ounce of turbine oil to a gallon of the fuel. The turbien oil can be obtained at your local airport, ask for BP2380 or Aeroshell 500 turbine or equivilents. One quart will be enough for at least 25 gallons of fuel.
Carl
Carl
09-06-2003, 01:34 AM
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I hadn't heard of the turbine oil additive....
Would you mind telling me a little more about that? I take it the Turbine oil mixes with methanol? I use Byron fuel too. A good grade of racing castor such as Klotz Benol added to the 18% oil is a good idea; add about 4 oz. Castor goes to the hot spots, and DF engines need additional lubricant at the crank pin and lower conrod bushing, where failure is most likely to occur.
Regards,
GPB
Regards,
GPB
09-06-2003, 04:02 PM
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os 91 alternative fuels
Umm hey just a crazy idea that just popped into my head. Has anyone thought of seasoning the inside of the engine with slick 50 or a similar lubricant/penetrant?
You could work it in by hand, and then clean all the excess slick 50 out. I've noticed that when you add it to an older vehicle without a computer controller you have to turn your idle down.
Which tells me without a doubt it significantly reduces friction, and increases engine performance. In modern vehicles though you don't really notice because the computer adjust the engine automatically.
Anyway like I said just a thought.
You could work it in by hand, and then clean all the excess slick 50 out. I've noticed that when you add it to an older vehicle without a computer controller you have to turn your idle down.
Which tells me without a doubt it significantly reduces friction, and increases engine performance. In modern vehicles though you don't really notice because the computer adjust the engine automatically.
Anyway like I said just a thought.
09-06-2003, 07:37 PM
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Turbine Oil
Yes the turbine oil mixes with the methanol. By adding a smaller volume of oi, i.e. the one oz. of turbine oil, you retain a greater percentage by volume of methanol and nitro that is delivered to your engine resulting in better power. By adding larger volumes of castor and Klotz techniplate you dilute your methanol and nitro and reduce the available energy that is in the fuel.
Carl
Carl
09-11-2003, 07:37 AM
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RE: os 91 alternative fuels
Hello All:
I had the same problem of getting fuel, but the hobby shop is carring fuel for the control line guys, PowerMaster 10% with 22% oil, half and half. We got two flights yesterday on this fuel, things seem to have gone well, good power, and lots of smoke.
Please let me know if anyone sees any problems using this fuel.
Thanks
Kevin
I had the same problem of getting fuel, but the hobby shop is carring fuel for the control line guys, PowerMaster 10% with 22% oil, half and half. We got two flights yesterday on this fuel, things seem to have gone well, good power, and lots of smoke.
Please let me know if anyone sees any problems using this fuel.
Thanks
Kevin
09-11-2003, 07:42 PM
#13
RE: os 91 alternative fuels
i've been using ritch's brew 10% nitro 11% castor 11% synth for years. the lhs in dallas had it cheap for the trainers, and it just seemed to work. the post wanting to know where these recommendations came from. Tom Cook of Jet Model Products came out some time ago with the statement that 5% nitro 23% oil was the way to go. BVM had his special brew by powermaster then later wildcat that was a 23% oil as well. the more oil you have the tougher it is to get a long consistant idle. in the heat of the summer i guess we should switch to 5%, but i am too lazy to do so. not any real magic to it, just once you get your engine set up to run on one brew, you do not want to switch and create troubles in your settings.
pat
austin,tx
pat
austin,tx
