choppersrule
Posts: 3768
Joined: 5/3/2006
From: Greenwood,
IN, USA
Status: offline
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Darn you Psi, I wanted to say that... 
PSI , is right, go with the lipos, you won't be sorry, plus you'll have many more options on 8, or 9 tooth pinion and blade combinations.
Below is a recommended blade, motor combination with lipos.
Happy hovering,
Dave / Choppersrule
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Main Motor, Pinion, Heat Sink, Battery and Main Blade Configurations
When using the recommended main motor, pinion, heat sink and battery configurations we have experienced very good main motor life (better than any other models in this class). We have main motors in stock and Aerobatic Enhancement Kit equipped models with more than 100 flights that continue to perform very well.
For those who may be experiencing premature main motor wear, it is likely the result of excessive current draw causing damage to the motor rather than brush wear. Excessive current draw can be the result of using the wrong main motor, pinion, heat sink and battery configurations, improper gear mesh or constant power on blade strikes and crashes (shock damage). For these reasons you MUST follow the power system configurations recommended to achieve expected motor life. These configurations are:
EFLH1110A - 370 Main Motor with 8-Tooth Pinion:
For use with 3-cell Li-Po packs and flat bottom main blades. This is the most efficient setup for long duration hovering and basic sport flying when using 3-cell Li-Po packs. Must use a heat sink (EFLH1132).
EFLH1110B - 370 Main Motor with 9-Tooth Pinion (Included with Aerobatic Enhancement Kit [EFLH1168]):
For use with 3-cell Li-Po packs and flat bottom main blades for hovering and sport flying, with less duration than when using the main motor with 8-tooth pinion. Also for use with 3-cell Li-Po packs and symmetrical main blades for sport flying and aerobatics. Must use a heat sink (EFLH1132, also included with Aerobatic Enhancement Kit).
We suggest 860–900mAh packs for all-out aerobatics with durations up to 15 minutes and 1200–1320mAh packs for basic aerobatics and longer durations up to 25 minutes or more.
EFLH1110C - 370 Main Motor with 10-Tooth Pinion (Included with the stock BCP heli right out of the box):
For use with 8-cell Ni-MH packs and flat bottom main blades for hovering and sport flying. This is the most efficient setup for long duration hovering and basic sport flying when using 8-cell Ni-MH packs. DO NOT USE THIS MOTOR AND 10-TOOTH PINION WITH 3-CELL LI-PO PACKS AS IT WILL DRAW EXCESSIVE CURRENT RESULTING IN SHORT MOTOR LIFE, EXCESSIVE RF NOISE POTENTIALLY CAUSING RADIO “GLITCHES” AND DAMAGE TO THE 4-IN-1 ON BRIEF BLADE STRIKES OR EVEN DURING FLIGHT. Use of a heat sink is optional (EFLH1132), though it can help to improve duration and motor life.
EFLH1110D - 370 Main Motor with 11-Tooth Pinion:
For use with 2-cell Li-Po packs and flat bottom main blades for hovering and sport flying. We suggest packs from 860–1320mAh. DO NOT USE THIS MOTOR AND 11-TOOTH PINION WITH 3-CELL LI-PO PACKS AS IT WILL DRAW EXCESSIVE CURRENT RESULTING IN SHORT MOTOR LIFE, EXCESSIVE RF NOISE POTENTIALLY CAUSING RADIO “GLITCHES” AND DAMAGE TO THE 4-IN-1 ON BRIEF BLADE STRIKES OR EVEN DURING FLIGHT. Use of a heat sink is optional (EFLH1132), though it can help to improve duration and motor life.
Also, we find it is best to allow the main motor to cool to near ambient temperature between flights.
Tail Motor
When using the recommended heat sink and battery configurations, we have experienced very good tail motor life (better than any other models in this class due to the use of a specifically designed N30 motor vs. N20). We have tail motors in stock and Aerobatic Enhancement Kit equipped models with more than 100 flights that continue to perform very well.
For those who may be experiencing premature tail motor wear, it is likely the result of excessive current draw causing damage to the motor rather than brush wear. Excessive current draw can be the result of using the wrong heat sink and battery configurations or constant power on blade strikes and crashes (shock damage). Vastly excessive amounts of gyro gain can also result in increased and excessive current draw. For these reasons you MUST follow the heat sink and battery configurations as well as gyro gain settings recommended in order to achieve expected motor life. These configurations are:
8-Cell, 9.6V Ni-MH Packs
When using 8-cell Ni-MH packs for power, use of a heat sink is optional (EFLH1131), though it can help to improve duration and motor life.
2-Cell, 7.4V Li-Po Packs
When using 2-cell Li-Po packs for power, use of a heat sink is optional (EFLH1131), though it can help to improve duration and motor life.
3-Cell, 11.1V Li-Po Packs
When using 3-cell Li-Po packs for power, use of a heat sink is required (EFLH1131, also included with the Aerobatic Enhancement Kit).
Also, we find it is best to allow the tail motor to cool to near ambient temperature between flights.
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"Flying is learning how to throw yourself at the ground and miss"
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