ORIGINAL: 2Sunny
ORIGINAL: OhD
We are actually looking for the power out of the motor. . . .
Now here is a test. It is two miles to grandma's house. One mile up the hill and one mile down the hill. My old car can only go 30 mph up the hill. How fast must I come down the hill to average 60 miles an hour?
Jim
''Uncle'', he cried!
I realize ''power'' is the proper terminology used by engineers as opposed to work, and I promise to be more careful in my explanations.
Joe
Thayer '88 BSEE
P.S. Average speed is based on time.
Yes. To average 60 mph I'd need to go the two miles in two minutes. However, because I didn't have enough POWER, I used up my two minutes getting up the hill. I could come down the hill at any speed and end up doing the same amount of work, but I couldn't do it in the required time so I failed the mission.
You need enough power to fly the pattern well. I'd say something over 3 HP into the prop.
Jim