Nitro percentage

mgmatus48 Sat Feb 14, 2015 11:44 pm

I'm new to the forum and I'm just now getting back into 1/2A free flight. In the past I just used the Cox 1/2A fuel that was commercially available. I searched the forum and 35% seems to be the maximum amount of nitro that most people use. It seems more than that is hard on the engines and you don't really gain much more performance from higher nitro amounts. Any recommendations?

Mark Boesen Sat Feb 14, 2015 11:53 pm

Yes, for sport flying 20-25% is fine, you could run less than 25% and many do, but if the nitro is available why not, these little engines are very happy with higher nitro then your common R/C engine. You will see a jump in power with 35% as well as a jump in price...its really your call.

mgmatus48 Sun Feb 15, 2015 12:15 am

Thanks that is generally what I've learned. I have some 50% nitro fuel and some castor oil. I can do the math to increase the nitro and oil percentages. I've noticed that 22% is also a good amount of oil percentage.

Oldenginerod Sun Feb 15, 2015 1:37 am

Try this fuel % calculator. it makes varying the % content of existing fuel very easy.
http://www.nitrorc.com/default2.asp?Introduction=http://www.nitrorc.com/fuelws/

Rod.

gossie Sun Feb 15, 2015 2:46 am

My competition brew that I mix myself is 25% methanol, 25% castor, 50% nitro.

mgmatus48 Sun Feb 15, 2015 11:16 am

Thanks everyone. I'm going to give it a try.

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Nitro percentage