Castle Creations 9000KV Motor

Feb 26, 2009 No Comments by

The new 9000kV motor from Castle Creations is their fastest yet, and we were psyched to get our hands on one of the first ones. I could have used a number of vehicles to test this bad boy, but I chose a 4WD touring car to get the highest top speed number possible. Follow along as I show you our setup and the numbers this ballistic motor can give you.

 

 

The 9000kV motor handles up to 8-cell Ni-Cd/NiMH and 2s LiPo. It’s a standard size 540 motor and weighs only 7ounces (198 grams). It features heavy-duty ABEC-1 bearings and has a standard 1/8-inch shaft to support a large number of pinions. Being rated at 9000kV means you get 9000rpm for every 1 volt applied to the motor. So on a 2s LiPo, we get 66,600rpm, and on an 8-cell NiMH, we could achieve 86,400rpm. That’s pretty fast.

 

 

I chose a modified TC4 to test this motor in. It has all carbon-fiber components, aluminum shocks, swaybars, Pro-Line tires and is dialed in for racing. Since it’s 4WD and shaft drive, there will be no belt skipping at high speeds, and it should handle like a rail. I stuck with the stock 72-teeth spur gear and chose a 29-tooth pinion gear for the testing.

 

 

The 9000kV motor is powerful and requires an equally beefy speed control to power it. I went with the Castle Creations Mamba Max. I hooked up the speed control to my Castle Link software to dial it in. I disabled reverse and set the low- voltage cutoff to 2 cells. All other settings I left at default.

 

 

I chose a MaxAmps.com 6500 30C pack battery to power this setup. It has more than enough capacity to run this car for plenty of passes and is capable of putting out a continuous 195 amps—more than what the Mamba Max or 9000kV motor can even pull. The LiPo fit perfectly in the tray and was lightweight; I chose not to go the 8-cell NiMH route, as the added weight wouldn’t be worth the added voltage, plus I would have to modify the battery tray.

 

 

I planned on hitting some high speeds with this car and wanted the steering to be precise. I went with the Futaba BLS 451 servo. It features a brushless motor and has a speed rating of 0.10 seconds at 6 volts. It also has more than enough torque for a touring car: 147 oz.-in. at 6V. It’s a super smooth servo and very precise. After centering it, I dialed down the EPAs to 70 percent. I also wanted incredible range and reliability as I would test this car at extreme speeds, and it would take quite some room to hit those speeds. I chose the Futaba 4PK computer radio system. It’s a 2.4GHz unit that features the Futaba FASST technology for extra reliability. Being a high-end radio, the 4PK has all the features I need to dial in my car and give me the controllability and reliability I required.

 

 

Once everything was together and ready to go, the RC Car Action team headed to an abandoned parking lot to do some radar passes with the car. First pass I just cruised slowly to make sure the trims were dialed in and the car was running smoothly. The gun clocked the car at 40mph—and I was barely on the throttle. After I had adjusted the trims slightly, I pegged the throttle. The car took off like a rocket but still was manageable to control. The radar gun clocked the first pass at 66mph. I was very impressed. There was no cogging at start, and the motor was cold to the touch after one run. I made more passes and was able to get 67mph out of the motor. I probably made about 15 passes, and the motor was still cool to the touch. The motor ran great and could have been geared a lot higher. I will definitely gear up and revisit this motor; I think I could easily have hit 75 or 80mph, as long as I kept the car on the ground. The 9000kV motor from Castle Creations is just plain awesome and capable of some serious speed. I highly recommend it all you speed freaks out there.

 

Sources

Castle Creations castlecreations.com

Futaba futaba-rc.com

MaxAmps.com maxamps.com

Pro-Line Racing prolineracing.com

Team Associated rc10.com

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