Upcoming Castle Outrunner Motors

[lincpimp]

Originally Posted by Sammus

I'm not bias, I want to be convinced otherwise.

AXi 4130/16 Gold:
Can Diameter: 2" (49.8mm)
Length: 2.6" (65.5mm)
Max 8s Lipo = ~30V (Rounding up)
Max Current: 60A/60s

So thats nearly 1800W surge.

Neu 1512 series lists max surge power for all of them at 2000W
They have length 2.4" and diameter 1.53"

Significantly smaller, yet higher surge power.

Even at the AXi's max efficiency constant current (listed as 40A) thats a hair under 1200W, and the 1512's are 1000W constant, and theyre much smaller.

Go to a similar sized Neu, like a 1915: 1.96" diameter, 2.25" long. Still smaller. Constant 1800W, peak 3600W, heaps more grunt, still smaller, and lighter too (14oz vs 14.4oz).

All good info, but you have not considered torque. Torque is what gets stuff moving quickly and more torque can change speeds faster. The 1512 will not make as much torque as the axi. The axi has twice the pole count of the new. Now the 1915 has a higher pole count, so it should make quite a bit of torque.

Also, look at the prices... The 1512 is more expensive than the axi, as it the 1915 (by quite alot). And they are for different applications. Axi makes a great outrunner, and castle will have to step up to excede axi's standards.

We can all agree that neu motors are some of the best in the world, so they should perform well. If I was making anything to race i would go with an inrunner, for both construction and performance. If i was making a crawler I would go with an outrunner. As for a dual purpose vehicle, it all depends on the speed desired...

I have a 6x6 maxx based truck, and I run an axi 2826/10 in it. It is geared for about 20mph in 2nd and 8-10 in 1st. It has tonns of torque and can crawl with the best of them. It will also jump and has plenty of speed for bashing, plus it has exceptional throttle control (due to the multipole design and the great firmware on the MM).

As I said, it all depends. HP (watts) is not the be all and end all of rc. Just read a car mag and you will see that the shootouts are not always won by the big number car...

[Sammus]

Originally Posted by lincpimp

All good info, but you have not considered torque. Torque is what gets stuff moving quickly and more torque can change speeds faster. The 1512 will not make as much torque as the axi. The axi has twice the pole count of the new. Now the 1915 has a higher pole count, so it should make quite a bit of torque.

Also, look at the prices... The 1512 is more expensive than the axi, as it the 1915 (by quite alot). And they are for different applications. Axi makes a great outrunner, and castle will have to step up to excede axi's standards.

We can all agree that neu motors are some of the best in the world, so they should perform well. If I was making anything to race i would go with an inrunner, for both construction and performance. If i was making a crawler I would go with an outrunner. As for a dual purpose vehicle, it all depends on the speed desired...

I have a 6x6 maxx based truck, and I run an axi 2826/10 in it. It is geared for about 20mph in 2nd and 8-10 in 1st. It has tonns of torque and can crawl with the best of them. It will also jump and has plenty of speed for bashing, plus it has exceptional throttle control (due to the multipole design and the great firmware on the MM).

As I said, it all depends. HP (watts) is not the be all and end all of rc. Just read a car mag and you will see that the shootouts are not always won by the big number car...

That's why I keep asking about torque :) That's why I keep talking about gearing down to the same shaft speed. Power and torque are directly related via rpm.

[lincpimp]

Originally Posted by Sammus

That's why I keep asking about torque :) That's why I keep talking about gearing down to the same shaft speed. Power and torque are directly related via rpm.

At 5250 rpm in a gas engine they are the same (if memory serves me correctly).

As far as taking 1 of each design that produce similar output (watts) numbers and setting them up in matching vehicles that are setup to go the same top speed... You will find the outrunner has more torque off the line due to its design. It should also startup smoother due to the multi pole design. The inrunner may spool up faster, and will feel more responsive once it is spinning. That responsiveness is more desireable in a land vehicle due to its reasonably large speed window. Plus the sealed can and lack of spinning parts also makes it better for the application.

Also, the fact that the outrunner can produce the same horsepower while spinning slower should indicate its performance ability...

Look at a big block gas engine versus a turbo 4-banger. Both can push out 600+ hp, but the big block will do so turning slower and will produce more torque. If you want to do 200mph the slow revving big block may not be the best choice due to weight and gearing options, but neither would putting the turbo motor in a tow truck... And just because the big block can make 700ft/lbs of torque does not mean the turbo motor can...