I got a 5600kv motor

[DMala]

A few months ago I found a closeout sale at RcDumbThumbs and among other discounted parts I got a Gaui 5600kv motor. I am waiting for the winter months to install it and run it on 2s and 15T. When I flew the EP200 a bit earlier this summer, I tried a few flips and got very uninmpressed (= in trouble) with the stock motor's lack of power for simple flips.

[BHChieftain]

Which stock motor were you running? My stock motor was the 5600 but I used a 5050 right away and have not tried the 5600 yet myself.

Chief

Sent from my XT890 using Tapatalk 2

[DMala]

The 4800 kv one.

[robl]

You should be able to do flips with any of the stock motors on 2s, but really, the best thing to do is switch to 3s. I put in a Trex 250 motor dropped the pinion and flew on 3s, bird was much better like that.

[DMala]

Thanks. I never did much research on using 3s batteries on the EP200, aren't the stock motors 3s-compatible with no mods needed? I read however that 3s is too much for the 5600 motor.

[BHChieftain]

I don't have any problem doing flips rolls and loops on 2S on the 5050kv motor. I can see how 3S would help with harder 3D, but man, that is a lot of headspeed...
Chief

[smith.sd]

3s is way too much for the 5600kv motor. To get a head speed that doesn't destroy the heli, you need a throttle curve below 50% - not good. For 3s you need under 4000kv. I have the 3900kv scorpion motor and that is almost too much. It comes with a short 2.5mm shaft, so you need the optional 2.3mm shaft from Scorpion which is also longer. You can also use a Trex 250 motor, but again need to swap out the shaft for the longer 2.3mm. Scorpion also have a 3600kv motor which is probably the best option.

[DMala]

Hello everyone, it has been a long time....

So recently I picked up my 5600kV motor project. I flew a few times with the stock 4800kV motor and 80% throttle curve (CC Phoenix 25 ESC), and confirmed that power was quite low for my liking. I upped the TC to 100% and things improved a little bit, but not a lot.

So I installed the Gaui 5600kV motor, reprogrammed the ESC to governor mode (it gave only a 100% TC option) and found that Gaui forgot to put threadlock on the shaft and the 15T pinion was loose... fixed that and now I have a problem of insane headspeed that is not sustainable. I lowered the TC to 50% and it is still too much. Maybe I am making some error programming the ESC, I entered the correct kV value and gear ratio but is there anything else I forgot? Any suggestion other than trying not governed mode? Battery is 2S. Thx

[ahahn]

You need to give some more info on how you are setting up the Phoenix 25. From your post, I am not sure how old the firmware is on the Phoenix. So I don't understand your 100% TC comment.

On my Phoenix 25 with the latest firmware, I can use the "Set RPM" function to get anyone of 3 target rpms, depending on how I set my throttle curve. That's why I wonder about your firmware version, also do you have the Castle link USB connector to program the ESC?

[DMala]

Yes I program the ESC with the Castle Link and I have just updated the firmware.

I agree, normally there is a choice of three RPMs depending on TC (this is what I had for the 4800kV motor) but once I entered the new 5600 kV value (the gear ratio stays the same) the two lowest choices become unavailable (I can check the exact message in 1-2 days). Maybe I need to use a pinion less than 15T, but this is odd because 15T is what came with the motor.

[BHChieftain]

My Gaui200 kit came with the 5600kv motor, but I don't recall what pinion. I never flew it that way as I immediately installed the 5050kv motor. You don't want to run the ESC below 75%, it can overheat. If the HS is too high, try moving down to a lower tooth pinion.

Chief

[DMala]

Time to check what I got among the zillion parts that came with my used Gaui 200s.... I know there are several pinions. I found various posts indicating the 5600 kV motor goes with a 15T, so I am uncertain what's going on. Does anyone know the number of poles? I actually could not find much info on those.

[Picofly]

You could try a 14T pinion. I used them when I was still running a 2S motor. I can't remember where I bought them but I could try to find a source. There should be one or two in my parts box if you want give a 14T pinion a try.

[DMala]

Thanks Pico and BHChieftain, I just found a 12T pinion NIP, I will first give a try to see what the Phoenix ESC software says for it. I will pass the offer to try the 14T but I appreciate your consideration PicoFly.

[DMala]

Well things got more complicated than expected: the 12T pinion did not fit on the 2.2mm (odd diameter?) shaft of the 5600 kV motor. So I tried to drill it to size and hopefully I got it right. Giving the Loctite a full 24h to cure, tomorrow I will try it out. The Phoenix ESC now gives the usual three choices of headspeed.

[BHChieftain]

How did it go?
Chief

[DMala]

I ran into a silly problem: the blue loctite failed after a few seconds of hovering that indicated that a TC of about 40% would probably work. The Castle Link program gives 3505 rpm at 100%, 3206 at 70% and 2953 at 30%: I started at 70% and still it seemed way too high, then hovered maybe a minute or so at TC 40% and it seemed fast but manageable. Then the pinion dropped down the shaft and when I tried to remove it to epoxy it on, it suddenly came out and flew off at high speed somewhere in the basement ...

Still MIA at this time, and I ordered a new 12T pinion for 2mm shaft off Ebay.....

[BHChieftain]

I hate it when that happens... with these little birds you are best off working on them in a padded cell...!

Chief

[DMala]

I agree but it would not have worked in this case. The pinion slipped all the way down against the motor and I could not slide under it the retaining plate of the pinion puller. So I was holding the motor with one hand and trying to pry the puller plate under the pinion and pull to slide it in, when the pinion gave up and flew up and sideways at 90 degrees probably landing a few yards away......

[BillG]

I've had my Gaui EP200 V2 for several years now. It has several hundred flights on it.
It too came with the 5600 Kv motor. It always had a sort of 'growl" to it and I read that some 5600 motors came unbalanced from the factory.

So, I purchased and installed a Hyperion 5300Kv motor (HS2206-5300): http://www.allerc.com/hyperion-hs220...or-p-4847.html
It's a 6-pole motor. No real change to the "growl". My later purchased Gaui X2 sounds the same... So I've left the 5300Kv in.

Anyway, 15T pinion came stock. I also have Castle Phoenix 25 with set rpm mode:
N-4334 rpm
IU1-4976 rpm
IU2-5418 rpm
I know this sounds insane, but this bird likes high HS. I fly IU1 mostly and it's pretty lively; flips and rolls quite good on 2S. Gaui CF blades.
I'm using Nanotech 2S/850 mAh, 25/40C discharge batteries with 3:30 flight time to 3.78V or so.

Like I said, hundreds of flights later with no self-destructing parts, etc. It's the noise that makes it sound like it's going to fly apart. It's normal for a Gaui it seems like! I now also have an X3 and it's loud!

They fly great though. I hope you sort out your pinion issue; I suggest the stock 5600Kv motor, 15T pinion, and Green Loctite. Enjoy flying it.