Brian,
I see that you have been asking about fuel load. I have kind of danced around that issue. But If you look at that chart I posted (courtesy of downunder, thanks Brian) you will notice that the center graph is charting fuel consumption. So on pipe and at full power a 10cc pattern engine will draw 45cc to 50 cc per/min. for the 2 hp rating. So for a 10 minute flight you will need 16 fluid oz. But since you aren.t at full power all the time you can drop that down a lot 14 fluid oz. Now the HB really wouldn't be producing the power of a true pattern engine so you can drop that down again. So 12 oz to 14 OZ is a good number. I like the smaller tank as they result in less variability to the fuel head pressure. On the subject of tanks, take a very close look at the bladdered tanks (AKA. bubble less type). Again I like what Dubb Jett markets. Please be warned that 80% to 90% of engine troubles can be traced to the fuel, fuel tank and fuel lines! The other 20% to 10% can be traced to not following MY directions!

All the best,

Konrad