ORIGINAL: hands without shadows
ct420 With your tail motors wired in parallel you are essentially adding twice the load of a single motor to your esc, if it wasn't for the lightened load your 4 in 1 would burn out very fast so its good that you have a fuse. A definite benefit of having the motors in parallel that I'm not sure you've realized yet is that you will be able to land your heli if one of the motors blows. Pretty much the only thing I would do to you mod is move the fuse towards the middle of the heli to balance it out a bit more.
Does anyone have pictures of the ducted tail mod? I'm really interested in seeing it.
Actually, no this is incorrect. It is not double the current load since each motor has less kinetic load on it. The current draw during normal flight is about the same (or even a little less) than with a single motor. It is less because less energy is being wasted as heat due to less brush arcing, etc.
I do agree, however, that if the motors were to become jammed and unable to turn somehow, that the current draw would be about double that of a single motor, which could blow out the 4 in 1. Of course, even with a single motor this could burn out the 4 in 1.
I did move the fuse up under the canopy several days ago. This is much cleaner...
Also, an update on the weight of the tail motors: I bought a more accurate scale 100g (+ or - .01g), and re-weighed the tail motors. They weigh about 16.4g each with the pinion gear installed, so my original posting of 8g was way off.