Thanks for you support, but I have to explain my previous question.

Looking for a replace nitro methane, I have found the following page:

http://www.hosenose.com/hevener/rcflight/5pctfuel.htm

A fragment of this page say the following:

"The nitromethane lowers the octane of the glow fuel so that it will more easily ignite under pressure. This is why nitromethane makes a glow engine easier to start and idle more reliably"

According to this concept, a substances that could lowers the octane, or on the other hand, increase the cetane of the fuel, could produce a similar effect than nitro methane.

Amyl nitrate is a cetane improver that is used in diesel engines and
RC diesel engines.

Methyl nitrate was used in experimental way like
cetane improver to allow the use the alcohol
in diesel engines.

(There are a lot of alkyl nitrates that could be used like cetane improvers)

We are using since 3 months ago, methyl nitrate and amyl nitrate in glow engines at 0.1%vol/vol (1ml per liter of 4/1 alcohol/castor oil mix) with good results, increasing acceleration, making starting easy and improving running.

We do no detected increasing in RPM, but we do not need it for our kind of flights

I can not believe, that we are the first that have used cetane improver in glow engines with good results (at least for the moment).

Due to that, I am asking if somebody have some previos information about that.
(Sorry for my bad English)


Thanks and regards