[quote]ORIGINAL: tigerdude426
Electric J-3 Cub Schoolyard Scale
Wing span 52 1/2 in.
Wing area 350 sq. in.
Wt. with radio 30 oz.
Wing loading 12.3 oz./sq. ft.
Fuselage length 27 1/2 in.
3 channel micro required
Motor : Geared speed 400 (7.2 volt)
or ASTRO .010 geared brushless
The motor bought - - - > Eflight Park 400 Brushless Outrunner Motor, 740Kv
Type: brushless
Size: Replacement for 370/400
Bearings or Bushings: Bearings
Recommended Prop Range: 10x4.7-12x3.8
Voltage: 7.2 - 12
RPM/Volt (Kv): 740 (rpms per volt)
Resistance (Ri): .26 ohms
Idle Current (Io): .55 @ 10V (no load current)
Shaft Diameter: 1/8 in (3.17mm)
Overall Length: 1.15 in (29mm)
Weight: 56g (2.0 oz)
Overall Diameter: 1.10 in (28mm)
Diameter: 1.1 in (28mm)
Continuous Current: 7A
Maximum Burst Current: 10A
Cells: 6-10 NiCd/NiMh or 2-3 LiPo
Speed Control: 10 - 20 Amp Brushless
As you can see the requirements match. But I will still use a 450 if you think it would be better. I am not looking for a lot of power in the flights themselves as I am not doing anything fancy with this plane, but I do prefer to have a flight time of 10-15 minutes.