View Single Post
Old
  (#18)
captain harlock
RC-Monster Captain
 
captain harlock's Avatar
 
Offline
Posts: 2,745
Join Date: Mar 2005
Location: Saudi Arabia
01.21.2007, 08:36 PM

I have to say that putting a 7700 Mamba motor in a Jato, even if it's a 1/10 nitro car, is an impulsive attempt for hi speeds.

First, the Jatos are quite heavy( in comparison to a T4) due to the metal chassis the components are sitting on.

Secondly, some of the GP3300 batts are of low quality and they have a very high internal resistance which might deteriorate the performance of the motor.

Thirdly, the Mamba Max motor's diameter, though the cans are 540 size, is not of the same size as the other real 540 sized motors such as the Lehner 1920 and the Hacker B50( meaning less torque). Not to mention that the KV is very high even when using a 7.2V pack. You are almost near 60000rpm, which is not good for the motor's effeciency and that is the reason behind the high temp of the motor.

Fourthly, GP3300 packs, the good ones, can give around 35amps of discharge which is veeeeery low for an amp hungry motor. The 7700 can easily suck 90amps out of your batts which they can't afford.

To provide a good amp feeding to the motor, I humbly suggest high discharge rated, high quality lipo packs.

Team Orion has the very good 4700mah pack with loads of power.

Even better, is the TrakPower lipo sold by FlightPower.

Both of those packs come in hard cases with very good numbers of amp discharging and run time.


The name is Alawi. You can call me Al.
Nice to meet you!

Last edited by captain harlock; 01.21.2007 at 08:38 PM.
   
Reply With Quote