Pletty vs Hacker

[Tc3basher]

It seems as the plettyburgs are getting a lot of attention these days. What happened to the almighty c40 series? Do they have an advantage over the hackers? Whats the scoop?

[kufman]

The pletty's are 4-pole motors so they may have more low end power. the 4-pole's also helps the controllers acquire the rotor position faster. I don't own the hacker, but I do have a shadow. I have heard that the hacker's may spool up faster since they have a smaller diameter rotor. They also have built in heat sinks. The Hackers are also a little longer motor while the pletty's are a little bit bigger around (36.7 mm on my calipers, 36.02 mm is a normal brushed motor can). One downside to the pletty's is that they have a shorter than normal output shaft. It is more like the length of a tamiya can 05 motor. This can cause problems for certain cars. Like my older Losi offroaders. I have to put a spacer between the motor and the motor plate and flip the pinion around the other way on those cars. They normally run the pinion with the teeth facing the motor and the setscrew facing out. The shadow shaft isn't long enough to allow this.

It would be interesting to see the two motors side by side in competition. Maybe this summer someone will bring a hacker to the track I race at.

[tcolesen]

Another reason I can think of for using Plettenburgs is because they are extremely efficient. At high amps, like 60amps, the motors still stay above 80% efficiency!

[chilledoutuk]

The only problem with pletenburg motors is that they are much harder on the controller than 2 pole motors such as the hacker c40's.
I would think that with a fan on a u-force 75 you should be able to gear quite highly without any thermaling.

[Tc3basher]

Harder to control? Can you elaborate some.

[chilledoutuk]

Well im not speaking from experiance just from what i have read on hear. The plettys are 4 pole motors which means the controller has to have a higher timing advance to get the rpm you want out of the motor. What this means that for a certain rpm the controller has to fire the coils up to twice as frequently if im not misataken which is quite hard on the controller.

I suspect the new MGM 120amp controllers will be able to handle the pletty shadows easily even with high gearing due to the abundance of current handling capacity.

However the u-force with out a fan has been known to thermal when geared quite tall with the plettenburg shadow.

[kufman]

I suspect the new MGM 120amp controllers will be able to handle the pletty shadows easily even with high gearing due to the abundance of current handling capacity.

Hopefully the new MGM's have different software. I hear they will be fixed for the midthrottle braking thing, but my mgm doesn't like to run my shadow or my avoex. Both of which are 4 pole motors. When i hit the brakes, they continue to go forward slowly and eventually stop. if I am already going slow they will speed up to this 1/4 throttle type speed and then slowly slow down and stop. I will have to try more of the timing modes and see if I can get rid of this effect.

I have also heard of the low turn c40's thermalling the u-force 75. just lots of current no matter how you look at it.