TomC
Veteran
Location: Gold Coast, Queensland, Australia
| Mario,
This is not correct. The Ion-x instructions say (I'm in the process of building my Ion right now, with stock hacker setup) to mount it so the label of the fan faces the motor. The fan then blows air at the motor and draws air over the speed controller. I tested this by hooking it up and that's the direction of the airflow.
On my Logo20 I use 2-12v pc fans (40mm versus 50mm for the 5v fan supplied in the kit), one blowing over the controller and one at the motor, more or less in-line, blowing towards the nose. I would have liked to have had the motor fan blowing tail-ward but there was not enough room to mount one in front of the motor. Anyway, this works great and I might try to do this with my Ion.
Also, I run these 2 fans in series and hook them directly to the controller battery leads. I think this is a better way than powering them from the receiver. This puts a little less demand on your ubec (or receiver battery) and may help reduce potential interference problems.
The 2-12v pc fans hooked in series make them effectively 1-24v fan, which is fine for my logo20 20-cell (24v) pack. They should work ok at 30-32 cells (~1.5 times this voltage) but I actually might look at adding a third one, in series, making it effectively a 36v fan. The 12v-pc fans draw 0.130 amp each and the 5v fan supplied in the kit draws 0.390 amp so actually the 3-12v fans in series end up drawing the same current. I guess 'high-voltage' setups for fans are also more efficient!
Looks like there is room to mount 2 fans in front of the motor, one close to the motor blowing towards the tail and one behind the receiver packs (or ubec), again blowing towards the tail. This should provide plenty of airflow over the motor and may help keep the receiver battery (or ubec) a little cooler as well. Think I'll mount the third one between the motor and controller (as shown in the kit, but with the label facing the controller) and tilt ot 45 degrees towards the tail so that it is blowing more over the controller. Also, this configuration in more in-line with the natural heli airflow in forward flight (but not flying backwards!).
What do you guys think?
Cheers,
Tom C |
