Project outrunner e-savage

[sikeston34m]

Originally Posted by Takedown

Sike, the motor's chosen their are actually going to be overkill because their both equivalent to .30 glow engines. Thats more than the stock savage X. That is going to really push the e-savage to its limits.

Overkill? If that's what you want to believe, you will be going through alot of motors.

It doesn't matter what their "glow engine" equal is advertised as being. A Glow engine setup has a clutch and this type doesn't.

These are Delta wound motors, and if the case diameter isn't at least in the 50mm range, then it isn't large enough in Diameter to produce the necessary torque to start in a Direct Drive Application. If you want to run through a gear box for some added gear reduction, then we can talk smaller outrunners.

Added gear reduction multiplies the torque and helps remove the resistive load from the motor.

A smaller higher kv motor will burn up quickly.

I don't mean to sound rude, but I've tested different motors for over a year now. The experience I have, didn't come without burning a few up.

Direct Drive is very demanding in the motor/ESC department.

Since a typical diff is going to have something like a 3.85:1 gear ratio. Combine that with a 5.75" diameter tire. You're talking about 4 1/2" of vehicle travel for EACH turn of the motor. It is true that outrunners make 5 to 7 times the torque of a comparable size inrunner, BUT this amount of vehicle roll per revolution is a huge load.

Again I say, 40mm stator diameter and at least 20mm in stator length.

[Takedown]

Originally Posted by sikeston34m

Overkill? If that's what you want to believe, you will be going through alot of motors.

It doesn't matter what their "glow engine" equal is advertised as being. A Glow engine setup has a clutch and this type doesn't.

These are Delta wound motors, and if the case diameter isn't at least in the 50mm range, then it isn't large enough in Diameter to produce the necessary torque to start in a Direct Drive Application. If you want to run through a gear box for some added gear reduction, then we can talk smaller outrunners.

Added gear reduction multiplies the torque and helps remove the resistive load from the motor.

A smaller higher kv motor will burn up quickly.

I don't mean to sound rude, but I've tested different motors for over a year now. The experience I have, didn't come without burning a few up.

Direct Drive is very demanding in the motor/ESC department.

Since a typical diff is going to have something like a 3.85:1 gear ratio. Combine that with a 5.75" diameter tire. You're talking about 4 1/2" of vehicle travel for EACH turn of the motor. It is true that outrunners make 5 to 7 times the torque of a comparable size inrunner, BUT this amount of vehicle roll per revolution is a huge load.

Again I say, 40mm stator diameter and at least 20mm in stator length.

Not to oppose you but do you know how light the e-savage is? With this setup it will lose more weight theirfore making the already light e-savage even lighter. It will weigh around 8lbs when finished.

[sikeston34m]

Ok, Good luck with your build

[Takedown]

Originally Posted by sikeston34m

Ok, Good luck with your build

Im really not trying to stand up to you its just I think he'll get some pretty darn good preformance from those motors. I'll see if I can surprise you.