Logo 690SX motor choice

[taosgraveyard]

Originally Posted by prototype3a

The 4525-370 is only ~3000w on 12s. The 3750w spec is on 14s.

I would also add the HK3 4035-450 as it is both lighter and more powerful than the stock motor. It is also bundled with the 'weaker' 600se and so any argument about stripping gears, breaking oneways or otherwise is invalid.

FWIW, I have read that production JivePros shutdown at just 20A over their continuous rating just like the Koby.
While , IIRC, Jives shutdown on a microburst of something on the order of 215A.

My Jive pros decidedly do not shut down from a microbursts of a mere 140 amps. My JLOG logs show lots of higher spikes,

Could you find where you read this and provide a link

[prototype3a]

It was in a thread in the Kontronik Drives section here on HF. I don't know the exact thread and without any of us actually seeing the code in the JivePros, it's mostly speculation. The general consensus in the thread was that the JivePros do certainly have much lower cutoffs than the older Jive,HeliJive and PowerJive.

FWIW, I know that 14pole motors really only have advantages when the motor is held close to it's maximum ratings continuously (ie flown very hard continuously) which honestly, I doubt very many pilots in this hobby actually do and even then the advantages are fairly small. In most cases and for most pilots, a 10pole motor will perform better.

[hemp]

When his attempt to call out the Jive Pro was challenged, the accuser back pedaled and quickly turned his attention to belittling Kontronik motors. I think we've unlocked a troll!

Kidding. Whatever you want to believe is fine. May even be technically true (I have no idea). Those of us running the Pyro 750 on the 690sx have had very good results, all running much less than full power.

[prototype3a]

Well, if you don't want to believe both PowerCroco's and several other's findings when it comes to motors that's your choice.

As PowerCroco says, it's physics and there's no getting around it.

I've personally shutdown a Koby 90 repeatedly with peaks around 110-125A. When the weather gets better, I plan to log it to see exactly where it is shutting down. Maybe the JivePros can handle microbursts similar to the old Jives (was it 220A?) but shutdown on longer term (1-2sec) but lower amplitude peaks?

Either way, the evidence is out there if you care to do the research that the JivePros can not be run anywhere as hard as the older generation.

[hemp]

[taosgraveyard]

Does it matter what the jive pro can not handle when talking about the 690sx, p750 , jive pro 120 HV discussion?

This combination works very effectively and the jive pro doesn't shutdown, according to my experience as well as some others in this thread.

This combination absolutely rocks.

[acidla]

Regarding the esc option, the YGE 120HV with heatsink would be sufficient for the stock Scorpion motor?

[taosgraveyard]

Maybe.... Depends.

[acidla]

I thought so...
My other option would be the CC Edge 160A.

[ToddM]

Originally Posted by acidla

I thought so...
My other option would be the CC Edge 160A.

I opted for the YGE 160HV just to be safe

[taosgraveyard]

I used YGE for a while. I would use a 160 amp... More than safe,

[hemp]

It really depends on how you fly. The 4525-370 generally is not a high current motor, so 120A continuous is probably enough to stay within specs for most pilots. However, if you're hard on collective or you fly in high temperatures then what's likely to happen is over-temp. Those aren't so bad with the YGE, it will just drop power and beep at you. However, hitting over-temp frequently can damage the unit, not to mention it's really frustrating to have your flights cut short.

Personally I run a YGE 160 on my 690sx, but I tend to be hard on speed controllers. I believe most people would be fine with a good 120A ESC.

[crash at 42]

This might Piss off a few but the 690 utilizes the same main gear as the 600se. All logo has done is lower kv increase pinion and gone from 10s to 12s. You can fly the same configuration in this heli as the 600se.
Lower kv and higher cells same main gear
Higher kv lower cells same main gear . hs is hs
Lower kv higher cell count lower temps
The pyro 700-45 10s with 14t pinion 2000 + hs jive pro 80%
Same motor 12s 12 t pinion same hs
I would go 10s and lose weight on an already super light heli

[maarset]

Yes but the 690SX has a much bigger OWB than the 600SE. And that is why you get away with flying it hard at 2000 HS.

[crash at 42]

Hmmm bigger is better?

[maarset]

Well more surface area. Double the size.

[crash at 42]

I added the motor support with the counter bearing to my 600se isn't this enough support against axial loads owb shouldn't be affected

[acidla]

Thanks for the replies.
I am not hard on collective, i just fly in high temps during summer time. 160A esc is the way to go then.

[janol]

will the new 400kv xnova motor on mikado usa site fit the 690sx?
http://shop.mikadousa.com/Xnova-4035...ng_p_1447.html

[hemp]

Originally Posted by crash at 42

I added the motor support with the counter bearing to my 600se isn't this enough support against axial loads owb shouldn't be affected

The 600sx OWB is prone to stripping when run in the 690sx. The original release of the model used that configuration and resulted in a recall. They quickly switched to a double-stacked OWB arrangement, which is proving to be rather bullet-proof.

Unlike the 600SE, the 690sx is designed to be flown hard. If you're easy on the model then none of the durability upgrades are really needed, you could just switch your 600SE to 12S, put in a bigger motor, and call it good. But many of us are running the 690sx at headspeeds above 2000 RPM with collective in the +/- 13 degree range and flying hard. For that to work, the extra OWB beef is necessary.