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Speed,Combat,Scale,Racing => Speed Talk => Topic started by: Rob Roberts on April 07, 2013, 06:31:27 PM

Title: SOP Propylene Oxide any good?
Post by: Rob Roberts on April 07, 2013, 06:31:27 PM

Has anyone tried this Propylene Oxide  www.motorsportsracingfuels.net/index.php?productID=128  if so was it any good?

Title: Re: SOP Propylene Oxide any good?
Post by: bob whitney on April 08, 2013, 09:39:02 AM

  Prope is well known in racing and speed flying ,until a few years ago it was a big part of the pulse jet fuel , but they had trouble getting it in Calif . speed now has a 10/20/70 % nitro, caster, methanal rule.  in racing the 1/2 A class still has an open fuel rule most run around 50 % nitro ,and they seem to run better replacing the methanal with prope .  more responsive and easier to set the needle.
  the big problem with prope is that once opened it evaporates very fast . unless totally resealing the container, usually just enough is mixed to get through the contest    ,i dont think there is any advantage  to using prope for stunt

Title: Re: SOP Propylene Oxide any good?
Post by: Rob Roberts on April 08, 2013, 10:20:21 AM

Thanks Bob for the info but in this case the prope would be beneficial for stunt. Its going to be used in Dan Banjock's jet stunter.
 http://stunthanger.com/smf/index.php?topic=28983.0

Title: Re: SOP Propylene Oxide any good?
Post by: bob whitney on April 08, 2013, 10:44:33 AM

a little diff  deal,,the jet guys are now using  nitro/ methanal combo, Joey can give the %'s i think it starts and runs better than the prope, but needs a larger tank

Title: Re: SOP Propylene Oxide any good?
Post by: bob whitney on April 08, 2013, 04:43:47 PM

  Ha Ha, yea, i have seen that thing fly  the speed guys have trouble getting 10 good laps and he dose most of the pattern  . i cant believe he runs that whole tank out

Title: Re: SOP Propylene Oxide any good?
Post by: bob whitney on April 08, 2013, 10:22:48 PM

 
  only from a distance.. his Bi-Slob is crazy