Toro 1/8 Combo - Page 4 - RC-Monster Forums

fastbaja5b · 01.20.2011, 12:00 AM

I'd be interested to see how long the rotor lasts. Reminds me of the first Traxxas VXL Motors, they had a habit of cracking rotors too.

simplechamp · 01.20.2011, 01:04 PM

You could probably do a carbon or kevlar wrap without too much hassle. You can get the kevlar thread online and then just need some dope or epoxy to affix it to the rotor. As long as you make sure there is enough clearance for the extra thickness of the thread.

BrianG · 01.20.2011, 01:06 PM

And you have to make sure the rotor is still balanced. I imagine even a teeny tiny bit of imbalance could cause "issues" at 30k+ rpm.

bigbadtaz · 01.21.2011, 03:34 AM

what the hell do you think castle invented brush less motor and ESC they have been around for more than 50 yrs now....and you dont think USA still crap from other places and do the same thing ever heard of the VCR, walkman and DVD playes do your history before you all start ripping into china and other places like it........i love the USA but i don't have a bighead about it products

fastbaja5b · 01.21.2011, 06:17 AM

Just picked up one of these speedies to test so will do a review, initial thought is it's fairly big tho. To keep it fair, and at the same price point as the MMP (for my comparison) I bought two, so one is NIP as a spare.

On a side note, it has no trouble powering my LED's that the MMP simply refused to, and it too has a Switching BEC.

...China ESC 1, Castle 0.

Pdelcast · 01.21.2011, 10:33 AM

Quote:

Originally Posted by fastbaja5b

Just picked up one of these speedies to test so will do a review, initial thought is it's fairly big tho. To keep it fair, and at the same price point as the MMP (for my comparison) I bought two, so one is NIP as a spare.

On a side note, it has no trouble powering my LED's that the MMP simply refused to, and it too has a Switching BEC.

...China ESC 1, Castle 0.

Pretty stupid comment... you are comparing the BEC (stolen from the Mamba Monster design) to the BEC on the Mamba Pro. They are different circuits, with different capability. I'm sure if you tried your LEDs on a Mamba Monster, they would work EXACTLY the same as the BEC on this cloned and stolen design.

Patrick

Pdelcast · 01.21.2011, 10:37 AM

BTW -- this "clone" has a copy of the V2 MMM BEC circuit. So beware.

Also, they are using NTMFS4833 MOSFETs, which are cheap, but are much less capable than the NTMFS4901 MOSFETs used by Castle.

Pdelcast · 01.21.2011, 11:15 AM

And yes, I am in a pissy mood.

01.21.2011, 07:40 AM

It would only make it only somewhat "slightly" (Very slightly) harder for the cloners to get their hands on them. People sell used/new stuff on ebay, and you can't make all of them refuse to ship to China as well. It would be pointless for a business to refuse to ship to China. It would just lose money I imagine.

BrianG · 01.21.2011, 11:21 AM

Pat, go get yourself a nice coffee and donut/bagel. Better yet, send an employee out to get them since it's probably snowing as much if not more than it is here a couple hours north of you.

What is it about the 4833 that makes them less capable? IIRC, a while back you mentioned something about switching losses but not sure.

Pdelcast · 01.21.2011, 11:28 AM

Quote:

Originally Posted by BrianG

Pat, go get yourself a nice coffee and donut/bagel. Better yet, send an employee out to get them since it's probably snowing as much if not more than it is here a couple hours north of you.

What is it about the 4833 that makes them less capable? IIRC, a while back you mentioned something about switching losses but not sure.

Well, a couple of things.

The 4833 has a poor gate-drain/gate-source charge ratio. This means they can't be switched very hard without shoot-through. This also means they ring more, which causes more switching losses.

They also have about 30% higher RDSon, which means higher i^2R losses. (1.5 millohms for the 4901, 2.0 milliohm for the 4833)

So, in short, they run much hotter at the same current than the 4901. But they are quite a bit cheaper, and more available.

slimthelineman · 01.21.2011, 11:40 AM

I love it, and you wonder why it costs less. Stolen r and d and crummy componets sounds like china stuff to me. Who needs headlights on their RC at the track anywho? Buy it right and buy it once it's cc for me!

BrianG · 01.21.2011, 11:43 AM

I think I remember some of that when we were talking about the 4933 the MMPro was using.

I believe Tekin still uses the 4833 in their RX8 ESC. I have only one of those ESCs in a smallish vehicle (Losi Ten-T) so it's not working hard enough to judge it properly, but I've been running without the fan forever and it never gets warm. This makes me want to try it in my XT8 truggy to see if it heats up any more than the MMM I'm using, just for giggles.

Pdelcast · 01.21.2011, 11:45 AM

Quote:

Originally Posted by BrianG

I think I remember some of that when we were talking about the 4933 the MMPro was using.

I believe Tekin still uses the 4833 in their RX8 ESC. I have only one of those ESCs in a smallish vehicle (Losi Ten-T) so it's not working hard enough to judge it properly, but I've been running without the fan forever and it never gets warm. This makes me want to try it in my XT8 truggy to see if it heats up any more than the MMM I'm using, just for giggles.

Yes - -the 4901 is a 4933 that has been customized for Castle. The 4933 is the "next generation" FET from Onsemi that fixed a lot of the issues with the 4833. -- and it's lower RDSon

lincpimp · 01.21.2011, 12:03 PM

The way I see these clones they need to be cheaper so I can just throw them away when they crap out. That is what they are, throw aways. No customer support and certainly no CC style warranty.

I will stick to CC cause their stuff works, they have great customer service, and Pdel is one of us!!!!