PLUMMEN wrote:
Wirewulf wrote:
I think we have some aviation members here who could verify this, but can't you get 100 octane low-lead at a local airstrip. That's what the piston planes use.
differant rating system
Goes to 11??:woohoo: (Spinal Tap ref.)
OK Plummen, you made me curious, so I went and found this out at wiki. If I understand correctly, the av-gas would have an even higher octane if judged by the same method. That is 100 octane aviation fuel ~ 110 octane auto fuel.
From Wikipedia:
"The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel through a specific test engine with a variable compression ratio under controlled conditions, and comparing these results with those for mixtures of isooctane and n-heptane.
There is another type of octane rating, called Motor Octane Number (MON) or the aviation lean octane rating, which is a better measure of how the fuel behaves when under load. MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, a higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON. Normally fuel specifications require both a minimum RON and a minimum MON."
Post edited by: Wirewulf, at: 2007/06/28 11:19
