Hi Grant,

It is tough to know how much fuel to carry, it depends on the use of the throttle.

A 15 minute flight is pretty long......you would need just under a gallon to fly that long at full power with a P-70!!

With judicious use of the throttle, maybe 60-70 ounces? Really hard to tell, but like I said not many try to shoot for that much flight time.


OOPS sorry, not sure what the "Jm" tank is, but the package includes everything you need except the main (kerosene) fuel tanks, if that is what you are referring too.