rear motor support

Is the rear support is necessary on brushless conversion???

I've a rcm revo motor mount on my brushless revo, but now i'am to convert my Mugen MBX5 buggy and i've order the RCM mugen motor mount.

I've a Neu 1515 motor, and i want to know if i should use a rear suupport on my buggy.

[squeeforever]

Nah, its not really needed.

[BrianG]

The Neus are pretty tough, so it's not necessary. But, you can still do it for peace of mind. After all, it won't hurt.

[Finnster]

I'd use it if it were there, but I wouldn't go out of my way to make one

[GriffinRU]

The idea behind rear support is to keep motor in proper alignment with gears. Failure to do that means:
- losses (wear) in gears
- unnecessary stress on motor shaft. motor housing, mounting bracket, chassis...

Now, do you need it? I'll say yes. At the end decision is yours, some gears and motors lasts longer some not :) and you always flex you chassis during jumps and landing.

[Serum]

I am a fan of a rear support too. It depends on the thickness of the mount thoug; i wouldn't use a stock e-maxx plate and a neu without support.

[RC-Monster Mike]

The rear support may do more harm than good on a truggy or buggy conversion - especially with my motor mount. My motor mounts are pretty thick at the motor area and provide lots of strength to prevent misalignment to start with, but they are also attached to the entire center diff mount (top and front are tied into the rear mount though each other and the lower chassis plate). This is effectively a square, which is quite strong, and any flex within it will be as a unit(diff will move with the motor if movement occurs, which will largely maintain gear mesh).
This in and of itself eliminates the need for a rear support. Furthermore, on nearly every 1/8 buggy and truggy I have seen, the rear chassis brace stops short of the center diff. This means that the chassis flex that is present will happen in this area(rear of the motor is in the "flexible area"). If the rear of the motor is supported ontop of this rearward chassis area, the chassis flex will move independant of the center diff/motor mount setup - effectively CAUSING the very problem you are trying to eliminate. Leave well enough alone - I think trying to support the rear of the motor in this particualar application will do more harm than good.

The Revo mount is different - there is not "square", so the rear support adds to the overall rigidity. Adding a rear suppport that is independant of the mount itself will cause trouble instead of alleviating it. :)

[Serum]

Sounds perfectly fair to me. i've felt/seen several of the RC-monster motormounts, and they are incredible stiff.

[GriffinRU]

Originally Posted by RC-Monster Mike

The rear support may do more harm than good on a truggy or buggy conversion - especially with my motor mount. My motor mounts are pretty thick at the motor area and provide lots of strength to prevent misalignment to start with, but they are also attached to the entire center diff mount (top and front are tied into the rear mount though each other and the lower chassis plate). This is effectively a square, which is quite strong, and any flex within it will be as a unit(diff will move with the motor if movement occurs, which will largely maintain gear mesh).
This in and of itself eliminates the need for a rear support. Furthermore, on nearly every 1/8 buggy and truggy I have seen, the rear chassis brace stops short of the center diff. This means that the chassis flex that is present will happen in this area(rear of the motor is in the "flexible area"). If the rear of the motor is supported ontop of this rearward chassis area, the chassis flex will move independant of the center diff/motor mount setup - effectively CAUSING the very problem you are trying to eliminate. Leave well enough alone - I think trying to support the rear of the motor in this particualar application will do more harm than good.

The Revo mount is different - there is not "square", so the rear support adds to the overall rigidity. Adding a rear suppport that is independant of the mount itself will cause trouble instead of alleviating it. :)

You brought a very good point of view!
But I haven't seen yet any conversion bracket which will work as you describe, which will make it ultimate solution ( still need support for rear, you need to fix motor in XYZ).
Do not forget that we try to eliminate flex created by motors torque as well, which has nothing to do with chassis flex.

Good, so on my revo i'll put the rear support and on my mugen, i'll not