Novak HV won't Work in new E-maxx

[GriffinRU]

To solve problem with shaft length motor manufactures need to flip front motor cover and have bearing sticking out like Lehner or Plettenberg motors, as well as brushed motors. That solution has as many "+" and "-", but does help with shaft (plus extra room inside motor can for windings and magnets), not good for mounting screws...

For Traxxas: why not to redesign slipper, put spur gear in place of slipper?
- not easy access to spur, Ok - it is great spur
+ dust from slipper ends up being further from motor bearings
+/- access to slipper itself

[Just go Play]

Will the 72t spur that has an offset fit on the 3905 or are there other clearance issues that would prevent this?

[suicideneil]

Putting the pinion on the very end of the motor shaft is bound to cause alot of stress on the shaft, especially if the truck is doing jumps and bouncing around. It would in all likelyhood snap, but that is down to the fact it is only 1/8", the common size used when it was designed. Hopefully the 5mm shaft upgrade will allow the pinion to be place further towrds the end of the shaft without risk of damage. Still, Traxxas were aware of this, yet said nothing- now there are a lot of people with motors that are no good for the new truck; you have to have a little sympathy for them and understand their predicament. I think a clever person with a CNC will need to design a new motor plate that is recessed in certain areas to allow the motor to be mounted further forward & line up with the spur better.....

[rootar]

i guess it wouldnt matter except for i just realized they are talking about a 1/8 shaft instead of the 5mm like every other decent sized brushless motor uses.

[mkrusedc]

Straight from the horse's mouth:
"OK guys, here is the story.

The Novak system WILL bolt up and WILL work. You have to leave the pinion extended off the end of the shaft. The pinion should turn true and fit far enough onto the shaft to remain secure. The only issue revolves around the shaft of the Novak motor. Stock up on rotors, as you will probably break them if you run hard (they could even break on the old E-Maxx, this is not breaking news- no pun intended). We pictured the Novak system simply because it was the only true bolt in, readily available system on the market at the time. Hobbyists wil probably see these companies evolve to produce systems compatible with, and able to withstand the power necessary to propell the truck.

-You cannot use a dished spur, it would interfere with the right transmission mount.

-Post #57 has the best solution in this thread so far, or until Noval offers a 5mm shaft. However, two things to note:
1) It will need to be run without the gear cover (both upper and lower parts).
2) The motor plate is designed to provide additional support for the input shaft bearing on the trans case-this is a snug fit. Moving the plate may still work, but we cannot promise this as we only tested it as designed.


Traxxas produces innovative new designs which tend to cause others to evolve. There is a short period of time following a new release that sometimes requires special procedures in order to achieve the desired results. As time goes on, hobbyists will see more and more readily available products to achieve those same results.


Zinno a Traxxas employee

[suicideneil]

Thats a good point. So far as the reversed motor mounting thing goes, it works perfectly with the old tranny. One would place short spacers between the existing motor mount and then bolt another one (mount) on top as it were using the gear cove mounting screw holes, sandwiching the spur and slipper. It wont work with the new tranny mount easily since there is only one gear cover screw present....

[JThiessen]

So in the interest of "making this work". How about taking a second motor mount plate, trimming off about half of it, and bolting it onto the "factory" plate. Then mark the contact area of the motor on the factory plate, and trim that off (after removing the New mount, of course). Thus you've just made an offset motor mount, with the offset equivelent to the thickness of the motor mount plate.

[suicideneil]

That idea sounds very familiar:

Originally Posted by suicideneil (traxxas forum)

I had this idea:
*Remove the spur and slipper, then trace the outline of the tranny onto the old twin motor plate.
*Remove the plate, and cut/dremel away the excess material.
*Remount the plate, but place the new single motor plate ontop, and use longer screws to attach them both to the tranny.
*Et voila, you can now mount the hvmaxx and the pinion will line up with the spur perfectly.

I'll let you off... this time

[JThiessen]

Originally Posted by suicideneil

That idea sounds very familiar:


I'll let you off... this time

[Patrick]

Originally Posted by GriffinRU

For Traxxas: why not to redesign slipper, put spur gear in place of slipper?

I don't think they can do that, because apparently the bottom of the spur is too close to one of the transmission mounts.

[suicideneil]

He he, apparently though Patrick had the same idea before me even, over on the noob forum. Im getting slow in my old age....