To make a long story short...
My PAP was lying up for approx. 2 months until the end of October. I knew the fuel in it would have gone stale but ran a little test out of curiosity (Yes I should have drained it...I didn't expect to be grounded for so long). The old fuel in it after 2mths was getting approx. 8400rpm (+/- 60rpm) according to my tinytach. Drained and refilled with regular 95 octane it was then getting approx. 9600rpm.
That's a 12% decrease in volatility in approximately 2 months.
So, after refilling 2 1/2 weeks ago the weather has been crap and its been sitting up again, this time for 2 1/2 weeks. Today I went out and was getting approx. 8600rpm.
That's a 10% decrease in volatility in approx. 2 1/2 weeks.
So therefore my fuel incurs 83% of its total 2 month volatility loss within the first 2 1/2 weeks.
What's worse, I found out today that in a 6-9mph headwind, that extra 1000rpm is the difference between me climbing out or just running aimlessly along the ground!
So after a quick google trawl here's my questions...
1. Does anyone use premium 97/98 octane, super 98/99 octane or high performance 102 octane in their motor and what difference do you see in RPM?
2. Has anyone ever used a stabiliser in their paramotor fuel and how did it go?
3. General thoughts?
I need to get my hands on some premium unleaded to measure the rpm at 97 octane but it seems very few forecourts sell it anymore.