1518/1520/1717 Replacements

[Pdelcast]

They will be coming back soon...

Not positive about the 1717 tho. We do have replacement rotors for the 1717 on the way.

Originally Posted by Pdelcast

They will be coming back soon...

Not positive about the 1717 tho. We do have replacement rotors for the 1717 on the way.

Please Pat don't can the 1717 motor. Thing is a beast. The only change I would like to see is lower kv one so we can run it safely on 8S. maybe make it 1719 or 1720 with kv around 1200kv. That would be stump puller combined with the MMMXL on 8S.

[lincpimp]

Originally Posted by Pdelcast

They will be coming back soon...

Not positive about the 1717 tho. We do have replacement rotors for the 1717 on the way.

A 1720 motor with lower kv would be the hot ticket. Nice to offer that with the mamba xl as a combo.

Originally Posted by lincpimp

A 1720 motor with lower kv would be the hot ticket. Nice to offer that with the mamba xl as a combo.

Amen. That would be a perfect set up for light 1/5th trucks or obese 1/8th ones. I honestly can't believe that the motors they cleared out were selling so poorly. I love every one of them. 1518 in my buggy, 1520 in my truggy and I haven't used the 1717 yet but I have seen what they can do. It will be going into a Savage eventually.

Anyway how bad do you guys think it will be to run the 1717 on 8S? I know that puts it @ 53,000rpm but with some voltage drop and load on the motor would it be possible for it to hold together for a few runs. I guess I could try 7S but would prefer to give 8S a crack.

[Unsullied_Spy]

Originally Posted by BIG-block

Anyway how bad do you guys think it will be to run the 1717 on 8S? I know that puts it @ 53,000rpm but with some voltage drop and load on the motor would it be possible for it to hold together for a few runs. I guess I could try 7S but would prefer to give 8S a crack.

Watch temps and don't push it to it's max speed and it should be an absolute animal. Patrick said a while back that they're rated to 45,000 RPM because the magnets will start coming apart at higher speeds. I've run this motor on 4s and 6s and it's stupidly powerful in a very heavy 1/8th scale Truggy, 8s would push a 5th scale pretty well if you were smart about your setup and watch temps. Main problem I see with running it on 8s is accidentally over-revving it, I'd stick to 7s max myself.

Originally Posted by Unsullied_Spy

Watch temps and don't push it to it's max speed and it should be an absolute animal. Patrick said a while back that they're rated to 45,000 RPM because the magnets will start coming apart at higher speeds. I've run this motor on 4s and 6s and it's stupidly powerful in a very heavy 1/8th scale Truggy, 8s would push a 5th scale pretty well if you were smart about your setup and watch temps. Main problem I see with running it on 8s is accidentally over-revving it, I'd stick to 7s max myself.

Hmmmmm, I think you are right about 7S but I want to fit this setup to a Savage flux and fit one 4S batt on both sides. Going to 7S might cause bit of a imbalance. That is the main reason why I wanted to go with 8S. Wouldn't be nice if the MMXL had a rpm limiter. You just dial into the CC Link what your motors safe rmp is and presto, can't over rev it.

Being a such a over powered rig it will be doing a lot of back flips and spending a lot of time in the air with a fair bit of throttle input for flipping and correcting during flight. This is where I see the over reving becoming an issue. I would hate to destroy one of these motors before Castle starts to make something similar again.

[sikeston34m]

Originally Posted by BIG-block

Hmmmmm, I think you are right about 7S but I want to fit this setup to a Savage flux and fit one 4S batt on both sides. Going to 7S might cause bit of a imbalance. That is the main reason why I wanted to go with 8S. Wouldn't be nice if the MMXL had a rpm limiter. You just dial into the CC Link what your motors safe rmp is and presto, can't over rev it.

Being a such a over powered rig it will be doing a lot of back flips and spending a lot of time in the air with a fair bit of throttle input for flipping and correcting during flight. This is where I see the over reving becoming an issue. I would hate to destroy one of these motors before Castle starts to make something similar again.

Why couldn't you limit the throttle to about 90% in the ESC setup?

What you will find is going to be an insanely overpowered beast anyway.

It always amazes me how I manage to overlook the most simple of things or just over complicate. Limiting throttle is a brilliant idea. I do remember BrianG saying somewhere that limiting throttle EPA to slow down your car isn't a good idea. What would be the difference between doing that (setting the throttle EPA to say 85-90%) and just not using the full throttle? I know what he said has to do with the FETs having the easiest time when they are operating at full throttle but not exactly sure about this.

[RC toy]

Originally Posted by BIG-block

Wouldn't be nice if the MMXL had a rpm limiter. You just dial into the CC Link what your motors safe rmp is and presto, can't over rev it.

So when new CC link version is going out, Patrick?

[Bondonutz]

Originally Posted by lincpimp

A 1720 motor with lower kv would be the hot ticket. Nice to offer that with the mamba xl as a combo.

This would be a beast and sell very well IMO, The 2028 is just too much for most apps.

[The Dude]

Originally Posted by Pdelcast

They will be coming back soon...

Not positive about the 1717 tho. We do have replacement rotors for the 1717 on the way.

You make this day a great day !!!.... so I gonna run my MGT just now !! (7:53 a.m )

[skellyo]

Originally Posted by Pdelcast

They will be coming back soon...

Not positive about the 1717 tho. We do have replacement rotors for the 1717 on the way.

Originally Posted by The Dude

You make this day a great day !!!.... so I gonna run my MGT just now !! (7:53 a.m )

I wouldn't get too excited:
http://www.rc-monster.com/forum/show...12&postcount=8