Strengthening 3905 motorplate for brushless needed? - RC-Monster Forums

JAILBIRD · **Strengthening 3905 motorplate for brushless needed? -** 10.26.2009, 07:42 AM

Is strengthening the motorplate on a 3905 trans needed for a BL motor? It seems kind of thin to support the weight. Does anyone have any ideas, or am I just overly concerned? The MAXX is going to be used as a basher. Thanks!

-JB

sikeston34m · 10.26.2009, 08:03 AM

Quote:

Originally Posted by JAILBIRD

Is strengthening the motorplate on a 3905 trans needed for a BL motor? It seems kind of thin to support the weight. Does anyone have any ideas, or am I just overly concerned? The MAXX is going to be used as a basher. Thanks!

-JB

I've never had any issues with it. Have used alot of different brushless motors with it too.

You won't have any problems. Something else with break before it gives you problems.

redshift · 10.26.2009, 05:51 PM

I'll second what sikes said, if you're using a Feigao the motor will come apart from impact before you'll bend the plate... no worries there.

Bondonutz · 10.26.2009, 06:20 PM

In my Revos. I was chipping Spur gear teeth during hard landings so I made a brace and it has cured the problem.
If nessasary you could do something similiar.

redshift · 10.29.2009, 09:36 PM

Nice solution Jeff.. no doubt you bash harder than I...

Bondonutz · 10.29.2009, 09:39 PM

Bow befor me

redshift · 10.29.2009, 09:47 PM

Uh well that ain't happenin.

Nice try tho

Head to head with the Mute- ya ready?

Bondonutz · 10.29.2009, 10:15 PM

Quote:

Originally Posted by redshift

Head to head with the Mute- ya ready?

I'm always ready to try to break sumthin' , Lets get R done !

Going to the track Friday, looking forward to runnin' laps regardless how bad I suck. It's all Fun !

redshift · 10.29.2009, 10:22 PM

I'll have you know the Mute took the 2006 'safest midsize RC' award. Not safe so much for the occupants, but safe itself

You'd still take a wheel off it tho, damn brute you are!

10.30.2009, 12:19 AM

I've also heard of using two motor plates(double) if the motor shaft will allow for the pinion the engage properly w/ the spur.

Bondonutz · 10.30.2009, 07:28 AM

Quote:

Originally Posted by etc1006

I've also heard of using two motor plates(double) if the motor shaft will allow for the pinion the engage properly w/ the spur.

Fine idea but mods wil lneed to be made to slipper assembly to accomodate the thicker plate.

shaunjohnson · 11.07.2009, 05:58 AM

contra to popular belief.
i dont believe the standard 3905 tranny needs beefing up.

you see...
the E-revo tranny mount is 3mm thick ally, this has a spacer that spaces the motor a further 20mm away from the motor plate.
the motor weights a LOT!!
mechanican advantage must be massive and hence the playe bends a little on hard landing, the extra torque put on the gears during a landing combined with the flexing of the motor plate bends the spur/pinion out of mesh and therefore strips.

ON THE OTHER HAND!
my setup, same as the old BL-emaxx setups people used to do has the motor mounted high on top of the tranny.
this is rubbish for COG i could imagine BUT there is a flip side to this.
the motor (castle neu 2200) only has about 2mm to bend down before it hits the tranny.
upon hard landing, the motor only moves down a very little way, the mesh stays in close contact and the tranny plate is able to flex back into it's original position.

make sence?
due to this theory, i have over 40 hours of use on my first and only spur gear i have ever used in my revo convert!!, ye-ol 65t still looks in great shape and i have no intent on changing it any time soon