Date:	4-21-2014
Number of Hours:	0.50
Brief Description:	High angle fuel flow test
I did a first fuel flow test tonight. I disconnected the fuel hose from the carburetor and placed it in a bucket (photo 2). I had the bucket marked at 1 gallon. THIS test was done with 3 gallons in the tank, and so left it with 2 gallons. This is a good test of a high angle with low head pressure. As I did on April 7, I did another fuel flow test, but this time at a climb angle. I had hoped to get to 25 degrees, but we were only able to get to 21 degrees (the angle of the hill + raising the front wheels). I opened the fuel valve by pushing in the rod I have connected to the valve and timed how long it took to fill the bucket to 1 gallon. It took 88 seconds (it was 82 seconds for the level test, so pretty close). If anyone wants to check my math: - 1 gal came out in 88 seconds - Flow(GPH) = 3600 X #Gallons/#Seconds - 3600 x (1/88) = 40.9 gph At 0.55 lbs per HP, the Aerovee should burn: - 0.55 lbs x 80 hp = 44 lbs/hour - 44/6 lbs (avgas) = 7.33 gph (wide open throttle) FAA says design for 150%, so... - 7.33 ghp x 150% = 11 gph So at 40.9 gph I think I have enough fuel flow ;)