Robert Youens
Jul 12, 2009, 09:05 PM
Like many of you I am flying in very high heat conditions right now. I have taken several steps on my plane to decrease motor heating and would like to start a discussion on the subject:
1. Cut out the cowling a little larger than the motor to allow air flow over the motor.
2. Use an aluminum motor mount to help dissapate heat of the rear bearing vs using wood or carbon which would not dissapate heat nearly as well.
3. Use props for electric motors that bring the pitch very close to the hub which dramatically increased airflow through the motor. I used a prop for a fuel plane for a while, but the prop was very large at the hub, blocking much of the airflow.
4. Use nose cone no larger than the hub of the motor to avoid direction air flow around the motor. I have noticed that some are using 2.75" and larger nose cones which would seem to block all airflow away from motor.
5. Removed the muffler air flow baffeling designed for gassers from my plane to improve air flow over batteries.
6. Opened 2 large exit holes (2" by 5.5") for air flow to exit the bottom of the fuse.
7. Try never to fly my batteries more than 60% to 70% of battery capacity to avoid system heating.
8. Try to keep max amp draw to no more than 80% of ESC and or Battery capacity (except for very short bursts).
I have not had to add fans or ducting to improve air flow over my batteries or motor since air flow is very good in these areas.
For those that are flying electic scale and use large nose cones, how do you keep from overheat your motors.
Please share additional tips or comments.
Robert
1. Cut out the cowling a little larger than the motor to allow air flow over the motor.
2. Use an aluminum motor mount to help dissapate heat of the rear bearing vs using wood or carbon which would not dissapate heat nearly as well.
3. Use props for electric motors that bring the pitch very close to the hub which dramatically increased airflow through the motor. I used a prop for a fuel plane for a while, but the prop was very large at the hub, blocking much of the airflow.
4. Use nose cone no larger than the hub of the motor to avoid direction air flow around the motor. I have noticed that some are using 2.75" and larger nose cones which would seem to block all airflow away from motor.
5. Removed the muffler air flow baffeling designed for gassers from my plane to improve air flow over batteries.
6. Opened 2 large exit holes (2" by 5.5") for air flow to exit the bottom of the fuse.
7. Try never to fly my batteries more than 60% to 70% of battery capacity to avoid system heating.
8. Try to keep max amp draw to no more than 80% of ESC and or Battery capacity (except for very short bursts).
I have not had to add fans or ducting to improve air flow over my batteries or motor since air flow is very good in these areas.
For those that are flying electic scale and use large nose cones, how do you keep from overheat your motors.
Please share additional tips or comments.
Robert