Z30 or Z20 motor?

[Mikej]

Mike,

I don't notice any negative characteristics with the 500 blades/short boom in FF, only in hover. In a hover my tail seems to bob about up, and down / side to side a bit, I think due to the propwash off from the longer blades. Not that it is out of control, or even hard to control, just different, and I don't see this with the 470 CF or 475 woodies.

Ken

Thanks Ken, not sure that I've noticed that.

Cheers,
Mike.

[dutch_anykey]

Jeeez that Z30 is powerfull !!!.

I switched from the Gaui 1100 to the Z30. The Gaui 1100 was running way too hot.
It also started bogging i noticed.
Today i had a quick test flight with the Z30....My hurri kept climbing full pitch without any bogging. ...Man uuhm hehe....cant believe i'm going too say this but....It might be just a bit too much for my kind of flying haha:lol:. O well...i guess in a few days i will get used to the extra power and get over it.
The Gaui was not bad in the beginning...but it got waay to hot every time. Maybe the magnets have gone bad due to the heat, The Z30 is handwarm, like the rest of the components. And Govorner + Z30 is more capable of holding the HS i noticed. I think i will try 2000 - 2100 HS and see what time i will get.

Flying 7S A123, CC P80 ESC, RCP 500 mm blades. 13T, Gaui O.k. gears

Will set it up properly next saturday, tach the head and time the flight. And i need to trim the CF canopy...can't seem to get the Z30 to fit under the hood :shock:

Maurice

[john2]

Quote: "Will set it up properly next saturday, tach the head and time the flight. And i need to trim the CF canopy...can't seem to get the Z30 to fit under the hood."

Ditto on having to trim the fiberglass canopy. My pretty purple headed Century 600+ motor from Readyheli now has a silver ring around the head where the canopy rubbed the anodizing off.

[bstock]

Cool Maurice!

Looking forward to your findings!

[ukgroucho]

And i need to trim the CF canopy...can't seem to get the Z30 to fit under the hood :shock:
Maurice

Yup... It's just too tall and too 'fat'. You end up removing a surprisingly big segment.

But it is worth it :YeaBaby:

[Hurriken]

Hi Brent,

Well finally got a couple of flights in with the Z20-980, havent gotten the data pulled together yet, had some issues with a connector vibrating off from my Eagle Tree, then rained the rest of the weekend. I dialed back the thr curve to get me a headspeed that both the Gaui, and Z20 could maintain (1850 tached, and verified match with Eagle Tree).

First impression was that the Z20 wanted to bog a bit on hard climbout, a bit more than the Gaui. I ran through 2 sets of packs tonight, but turned up the thr curve to 90%, this gave me 2000 hs, and the heli really came to life on climbout, the bog from before disappeared. So I think i'm getting the Z20 down in rpm to a point that it is down on its torque curve, I don't think the Z30 guys would have this problem. Unfortunately 2000 hs is about max on the Gaui w/16t, so as I move up on pinion size with the Z20 I'm going to leave the throttle curve up, and let hs go where it wants, and see what I get.

More importantly what I was after was a cooler running motor, with more or less equal run times. The Z20 runs a world cooler. Gaui 850 was running 165° the Z20 usually runs in the low 90° range. Run times are down :30 from stock Gaui in my worst run so far so I am quite pleased with where I am now with the Z20. So I will see what results I get in run times with the other pinions on the Z20.

I would love to see the climbouts that Maurice is getting with his Z30, they must be wicked fast! I scare myself with the climbouts I get now with the Z20.

[bstock]

Hi Ken,

THANKS for getting back to us on your new motor!!

If I am reading this right... you are running a 16t pinion on it now... and you found your run time was down 30 seconds ... but your head speed was up 150 rpm to meet the torque curve the z20 wanted to run in?

Which blades (the 470s?) and batts were you running it on?

It would be interesting to see if the flight times for both motors running at 2000, would be much different.

Thanks Again for getting this to us... Very Cool !!

Brent

[Hurriken]

Hi Brent,

I am running:

16 tooth on the Gaui 850 @ just over 1900 HS.

14 tooth on the Z20 @ 2000±50 HS.

My trusty 470 MS Carbon blades, and 2200 Kong Power, and 2170 Evo 25's

Havent run the 15, and 16 on the Z20 yet, the :30 decrease in flight time was with the 14 tooth. I'm guessing that I will lose more with the 15, and 16 as the required torque increases, but the Z20 is supposed to be more effecient, so I'll have to test and see, maybe it can handle the additional torque requirement without much additional Mah comsumption.

Sounds like rain around here until the first of next week, so I will test and report as I can.

Ken

[bstock]

Thanks for the additional details Ken!!

They are calling for rain here also... damn... I wanted to fly this bird again this weekend.

[tornet999]

I have the Z30A too, and today I tried it at 100% with 6s 3200 setup for a complete flight, wow it is really nice. I have also the GAUI 1100kv, and mentioned above it is good but Z30A is clearly better. The heli has now almost same behaviour as the logo14 in the REFLEX sim that I am using.

I had some problems with the tail kicking couple of times in the begining of the flight, I will try the recomended TREX tail upgrade now.

[pjones]

Hey Guys,

How is the data coming Ken? I am still picking peoples brains for a power setup. I don't think I will ever fly full 3d just a few loops and fast forward flight. From the posts the z20 looks to be a good motor - how is yours going? what sort of flight times are you getting from what sized batteries?

Regards

Paul.

[erbrou]

Hey Guys,

How is the data coming Ken? I am still picking peoples brains for a power setup. I don't think I will ever fly full 3d just a few loops and fast forward flight. From the posts the z20 looks to be a good motor - how is yours going? what sort of flight times are you getting from what sized batteries?

Regards

Paul.I also want to know. I received my z20 motor few days ago, but I do not know when I will fly it. I am still waiting for my esc, gyro and receiver.

[Hurriken]

Hi All,

Well it's been slow going on the Z20 testing front. The weather hasn't been cooperating too well for me, when its not raining, its been too windy for me to fly, not maybe to windy for some to fly, but anything much over 7mph winds and I won't go up. And to be honest, the one time I got a chance to fly last weekend, I just went out for fun, and did some gentle FF, and didn't even have the Eagle Tree on. Also lost data on 3 flights due to my add on board vibrating off from the Eagle Tree, I've resolved that now, just putting a small piece of tape over the connector, and onto the Eagle Tree board.

So far I really like my Z20-980 a lot, but have noticed that you need to keep the throttle curve up there 85%+ to keep the motor in its power band. Trying to keep the HS down by lowering Thr Crv wanted to make the Z20 bog a bit on hard climbout. Others running the Z30 don't seem to have this problem, but if they have the plastic frame, and Gaui gears the Z30's torque can cause some problems. The Z20 also seemed to chew away at the batteries quicker with the reduced throttle as opposed to the higher curve, probably load.

As far as flight times and batteries go: All my data collection is being done with the sames set of batteries, EVO 25 2170's, but I also run TP 2100's, and Kong Power 2200's as well on the Hurri. Flight times are more or less equal across my three sets of batteries. If I run them down until the voltage alarm starts to go off (10.7v trigger) I'm at about 6:30, and used to get 7:00 with the old Gaui 850 Kv. So am pretty pleased with that. I'll probably move into the higher Mah packs once my flight skills improve, so that I can pick up some runtime, but I'm not sure how much more I'll gain with the added weight.

I am running MS Composite 470mm CF blades which help my runtimes because of low blade weight, and drag (usually someone will ask about this).

Climbouts with the Z30 must be scary fast, I did a 100% climbout the other day with the Z20, and that sucker shot up 50' before I could even react to stop it! And still only maxed out at 26 amps, so no worries on the 50a ESC.

Bottom line is if you want to sport fly, with some mild 3D, and still want good flight times the Z20's probably for you. And all you have to do is drop it in, and fly, use all the same gear you were using with your Gaui 850.

If you want to do mainly 3D, and stick banging about, or you want to progress from sport flying into hard 3D, buy the Z30.

Z20, and Z30 motors sell for the same price, but with the Z30, you should reinforce the frame (if plastic), go to revco gears, up the ESC to 75a, and bump up to at least 3300 Mah packs. There also seems to be a growing concensus that a T-Rex 600 tail transplant is a good idea on higher Kv/Torque motors, due to kickout of the tail.

I'll post some graphs when I get a few more flights in with other pinions.

Ken

[bstock]

Hi Ken,

THANKS for the update!!

I hear you that the Z20 runs better at 85%.

In reading forums, and running my 450... It is advised to run a brushless motor and the ESC at 85% minimum, because they run more efficently (and cooler), and with more power from the batts. Once running at 85% or higher... I use the pinion size to regulate the head speed that I am after.

26 amps at full climb out sounds like a good number... I like the sound of that (and also the "50 ft before you could stop it"... sounds like Fun)! Do you happen to know what the stock motor was pulling for amps in a full climb out?

Thanks for the frequent updates!! I really appreciate it!!!

Hope you get some good flying weather soon!

Brent

[Kepler]

Hi All,

Climbouts with the Z30 must be scary fast, I did a 100% climbout the other day with the Z20, and that sucker shot up 50' before I could even react to stop it! And still only maxed out at 26 amps, so no worries on the 50a ESC.

Ken

You must have a very conservative pitch curve and head speed. I see 34 amps in the hover and 75 amps on climb out (with a Gaui 1100 kv motor) Thats on aound 2250 rpm head speed,80% governor and + / - 11 degrees pitch range. (500mm carbons)

[BL]

With the stock 850kv motor and pitch of 9deg, I have 18A in the hover and 51A on climbout.
HS=1800rpm.

[erbrou]

Thanks Hurricane, it helps a lot as I will use the same motor and packs than you.

[pjones]

With the stock 850kv motor and pitch of 9deg, I have 18A in the hover and 51A on climbout.
HS=1800rpm.
BL,

How does the heli run on 1800rpm headspeed? Is it enough for loops and rolls, inverted hover etc? What size batts do you run and what run times do you get?

Regards

Paul.

[Timmey]

With the stock 850kv motor and pitch of 9deg, I have 18A in the hover and 51A on climbout.
HS=1800rpm.

Sorry but that cant't be.

[Backfired]

Does anyone in the states sell the Z20 or Z30?

[kgfly]

http://www.tppacks.com but he doesn't list the Z80-980KV and seems to be always out of stock of almost all the other ZPower motors :dontknow

[bstock]

I looked every where in the US for a z20-980 motor... and I couldn't find one.

[erbrou]

I looked every where in the US for a z20-980 motor... and I couldn't find one.Take a look: http://flying-hobby.com/catalog/product_info.php?cPath=18_76&products_id=1018 . I have ordered mine there, shipping was very fast.

[BL]

BL,

How does the heli run on 1800rpm headspeed? Is it enough for loops and rolls, inverted hover etc? What size batts do you run and what run times do you get?

Regards

Paul.

It's enough for mild 3D, just nice to do loops, rolls and more than enough for inverter hover. But it bogged a lot during tic toc.

4.5min with 2200mAh lipo.

[BL]

Sorry but that cant't be.

Here attached with the eagletree captured at 100% throttle and it shows 20A at hover.

I didn't save the 18A hover with 85% throttle.