Hi i am new to helis and i have a raptor 50 titan. I run the stock engine , TT 50 PRO. I want to ask members of this forum if it is possible to run on 5 % nitro or no nitro at all? The nitro price here is very high and if it is possible to run without nitro then it would be very good. I dont care about the performance lost, i am not a 3d pilot i am a rooky.

Thanks

I have run 5% in an OS 32 on a Raptor with no problem other than less power but I have never tried it in a TT50. Different engines behave differently with low nitro. Some get extremely hard to set the needles on and others, especially european engines, run quite well on low or no nitro. It's kind of a try it and see thing.

Your engine should run good on a manufactured no-nitro fuel.

To just mix castor oil and methanol will not make for a pleasurable experience in keeping the needle valve set.

There has to be just a little nitro or maybe some acetone will stabilize the combustion characteristics of the fuel.

Thanks for youur answers. I saw that european engines like the webra and rossi runs good on no nitro or low nitro. Maybe i tty those engines out when my tt50 dies. Is it possible to buy a petrolium engine on a raptor 50? Have any one heard of this? What option do one have are there only electic and nitro engines that works for helis?

Thanks

I mix my own 80/20 all castor fuel and every engine has always run perfectly on it. A little (about 3%) acetone is supposed to make the idle a little smoother about the same as 5% nitro but I've never needed it. I believe heli fliers like a lot of nitro because they can get the same power as without nitro but use a much richer setting to help cool the engine.

You really ought to broaden your horizons my Aussie cousin.

Castor is a fine lubricant but we have moved on a little in the past 100 years you know :-)

Why compromise your engine's true performance potential and create a sticky mess for yourself by running 20% castor when most modern engines will run a whole heap better with smaller amounts of a *decent* synthetic with a sniff of castor for old-time's sake?

Drop me a PM and I'll send you a few hundred ml of "the good oil" you can try out. If you've never tried it you can't knock it.

Yes i think the best thing would be to mix a 50/50 of syntetc oil and castor oil, or maybe less castor oil. And the rest metanol. Some nitro only if power is needed. I read on the manual for the Thunder tiger helicopter engines that they recommend 80 % metanol and 20 % oil during engine running in and in general use. Only nitro if more power is needed. So i try there recommendations.

thanks

barq
If you don't use any nitro then keep the oil content at 20% because the much lower fuel consumption means less oil flow through the engine. I have one engine (an ST 51) that's so economical it needs 25% oil to stop it from over heating.

XJet, thanks for the offer. I know some synthetics can be very good and the only one I've trusted in any of my engines so far has been a turbine oil but they're $28/litre for Mobil Jet Oil II and $20/litre for Shell turbine oil while my castor (Castrol M) is $8/litre.