ORIGINAL: dick Hanson
strange --I ran the ST2300s and on a 20 oz tank - I used most of it for an IMACpattern - I paid 16 bucks a gallon for #2 Magnum 128 ozs /20=less than 7 flights per gallon -in actual use NEVER 10 flights in a gallon ($1.60 per flight at best)
My piped Tigres ran very hard the typical 18x8 at over 9000 on the ground.
power comes from fuel efficiently used - the engine is just a converter
What is strange about that?
Have you seen this? Bob Pastorello is getting .8oz min using OS 1.6FX with his pattern plane
For comparison the YS1.4 is using 2.2oz min flying the same pattern with the same plane.
http://www.rcaerobats.net/MotorCostComparison.htm
Some converters are more efficient than others
If I had to pay what you have to for fuel I would have went to gas already.