Thanks for the info
I went back and looked at one of my old K&B fuel cans and on the back of the can they listed the 5 types of fuel that they sold at the time: 100, 500, 1000, Speed, and F.A.I. -There was also a vague discription of the intended use of each type i.e U-control, pylon, free flight, combat, but the use discriptions often overlaped and there was no indication of what % of ( I guess) nitro was in each type.
Thanks again!