Losi Ten-T Conversion

[RC-Monster Mike]

I would like to address a potential concern that may arise (and BrianG touched on) regarding the use of a single M3 screw to hold the motor in place:

The M3 screw is rated for 174,000 psi pullout/tensile strength(not a typo - 174 thousand pounds per square inch). Basically, if the screw is tight(bellville washer is included to help insure this), the strength far exceeds what is necessary for the task at hand(even with a pretty large motor). The aluminum threads in the motor would be the 1st failure point, actually - it is recommended that the screw engages threads in aluminum equal to 1-1.5x the major diameter of the screw (so 4.5mm thread engagement for optimum strength when threading into aluminum - most motors have at least 5mm thread depth). It is somewhat normal to be skeptical of a single M3 screw I suppose, but most folks don't realize exactly how much force they can take when used/tightened properly. :)

Niel - the motor mount effectively works exactly like the ERevo motor mount - just a slightly different means to the same end. :)

[ta_man]

Originally Posted by RC-Monster Mike

I would like to address a potential concern that may arise (and BrianG touched on) regarding the use of a single M3 screw to hold the motor in place:

The M3 screw is rated for 174,000 psi pullout/tensile strength(not a typo - 174 thousand pounds per square inch). Basically, if the screw is tight(bellville washer is included to help insure this), the strength far exceeds what is necessary for the task at hand(even with a pretty large motor). The aluminum threads in the motor would be the 1st failure point, actually - it is recommended that the screw engages threads in aluminum equal to 1-1.5x the major diameter of the screw (so 4.5mm thread engagement for optimum strength when threading into aluminum - most motors have at least 5mm thread depth). It is somewhat normal to be skeptical of a single M3 screw I suppose, but most folks don't realize exactly how much force they can take when used/tightened properly. :)

Niel - the motor mount effectively works exactly like the ERevo motor mount - just a slightly different means to the same end. :)

If the truck does a couple of endos and lands on its lid is that single M3 screw strong enough to keep from bending when the whole weight of the motor is now being pushed to the top of the truck (remember it landed upside down) by inertial forces? The single screw is then just a pivot point for the motor as the back end of the motor is forced away from the chassis.

[bryan]

Imo it looks great.Nice job Mike.If someone would be worried about the strength of a single screw shouldnt they be able to use the included bushing w/a longer screw and a washer slightly larger in diameter than the lower hole opposite side of the motor for more durability? Just a thought.

[ta_man]

Brian, can you tell us how much the truck weighs, RTR with body on?