I have a NSP Sandy electro-glider with S400-6V on 8-cell Sanyo-600AE with 3.8:1 planetary gearbox and aeronaut 11x7 folder.
I installed the gearbox very recently but I am disappointed with low current draw. The above setup draws only 5A, while the same motor direct drive on 7-cells and 6x3 folder, drew 9A. I am suspecting that maybe I have overheated it at the end of last season and killed the magnets, because I do not have cooling vents.
Would overheated magnets lower the current that much?
What is the best size of intake and outflow fuselage vents for S400 motor? This glider has a small fiberglass fuselage. Are NACA intake scoops much more aerodynamic than round holes in the nose? Is NACA scoop worth doing if I won't build a duct underneath? I want to be careful choosing the vents as not to introduce too much drag.
On another note, if I get a new S400-6V, will I get 7-8A with the above setup?
What are good S400/480 motors with adjustable timing, 2.3mm shaft (for my gearbox) and which would work well for the above setup?
How do I pull the pinion gear from the old motor?
Thank You,
Michal