Post by Dave Seay on May 14, 2009 13:23:03 GMT -5
I just finished the upgade to my Xenath power plant and ran it through the Whatt Meter. Wow!
I've got a Hacker B40-8L with a 4.4:1 gearbox, turning a 16x10 prop on a 2700 mha 3s1p lipo pack (30C) though a Phoenix 80 ESC.
During a static test, it drew 69 Amps and is at 730 watts. Motocalc gave me this setup and projects about 2000 ft/min rate of climb. That should pretty well be straight up. 15 seconds should do it!
The Xenath is a full house ship with a span just a few inches shy of 3M and an old, reliable 7037 airfoil. As with most larger electrics, its heavy with about a 10 oz wing loading but it seems to like it. I flew this plane several years back with an even heavier setup (before lipos had the capacity to handle the draw) and it really flew well.
Really lookin' forward to its new 'maiden'!
Dave
I've got a Hacker B40-8L with a 4.4:1 gearbox, turning a 16x10 prop on a 2700 mha 3s1p lipo pack (30C) though a Phoenix 80 ESC.
During a static test, it drew 69 Amps and is at 730 watts. Motocalc gave me this setup and projects about 2000 ft/min rate of climb. That should pretty well be straight up. 15 seconds should do it!
The Xenath is a full house ship with a span just a few inches shy of 3M and an old, reliable 7037 airfoil. As with most larger electrics, its heavy with about a 10 oz wing loading but it seems to like it. I flew this plane several years back with an even heavier setup (before lipos had the capacity to handle the draw) and it really flew well.
Really lookin' forward to its new 'maiden'!
Dave
Once the motor is turned off that prop and battery are just weight and drag.