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BrianG · 11.04.2006, 03:12 AM

The 4600/5700 are the Mamba Max motors and refer to their model numbers and their KV rating. KV is how mnay times the motor spins per volt. 4600 means it spins 4600rpm per volt. 2v=9200rpm, 3v=13800rpm, snf do on.

6Ah/8Ah refers to the battery capacity in amp-hours. Sometimes you'll see it as 6,000mAh; same thing. 6Ah means it supplies 6 amps for one hour, or 12 amps for 1/2 hour, or 24 amps for 15 minutes, and so on. The bigger number is not necessarily better. Sure, it has higher capacity, but weighs more.

The battery voltage you need depends on the motor selected, the gearing, etc. You've already said you want to do ~55mph with long runtimes. The 5700 motor with 2s lipos rated at 8Ah will give you that of not more. Of course, it depends exactly how much runtime you want. It also depends on how you drive (full throttle starts all the time needs more power than reasonable throttle), weight of vehicle (heavy needs more power), terrain (tall grass is harder to go through so it pulls more power), etc.

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BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	11.04.2006, 03:12 AM The 4600/5700 are the Mamba Max motors and refer to their model numbers and their KV rating. KV is how mnay times the motor spins per volt. 4600 means it spins 4600rpm per volt. 2v=9200rpm, 3v=13800rpm, snf do on. 6Ah/8Ah refers to the battery capacity in amp-hours. Sometimes you'll see it as 6,000mAh; same thing. 6Ah means it supplies 6 amps for one hour, or 12 amps for 1/2 hour, or 24 amps for 15 minutes, and so on. The bigger number is not necessarily better. Sure, it has higher capacity, but weighs more. The battery voltage you need depends on the motor selected, the gearing, etc. You've already said you want to do ~55mph with long runtimes. The 5700 motor with 2s lipos rated at 8Ah will give you that of not more. Of course, it depends exactly how much runtime you want. It also depends on how you drive (full throttle starts all the time needs more power than reasonable throttle), weight of vehicle (heavy needs more power), terrain (tall grass is harder to go through so it pulls more power), etc.