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Old Mar 15, 2009, 11:07 AM
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Chattanooga, Tennessee, United States
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Mini-Review
Turnigy C3530-1100 (~1075Kv)

Mini-Review - Turnigy C3530-1100 (~1075Kv)

The last of the motors lent to me by Steve Atchinson (Butch777). This gold Turnigy C3530-1050 is said, by Hobby-City, to be most efficient at 10A-15A, but no max. current draw is given. Strangely, H-C over-stated the weight - with the supplied connectors I made it only 73g, not 77g.

Reading the reviews one wonders who is writing them, what sort of measuring devices (and math skills) they have, and what their definitions of "barely warm" can be. It seems to me that the typical user (abuser) is pushing this motor far too hard, with props which are far too big for it. Let me share some of the weirdness: With a 10x5 guys are stating that it draws, variously, 15A, 19A, 22A - the guy running the 22A said it got to 70C in 4 minutes of mixed flying. Another guy using a 10x6 measured 20A/240W and said "good cooling is a must". A 10x7 was variously quoted as 16A/220W on 3s (13.75v for 3s?), 25A/250W ("not even warm") and 24A/303W (12.6v for 3s?, "80C after 4 minutes of mixed flying"). An 11x4.7 APC SF drew "22A-23A max" and "30A-40A", yet a 10x8x4 drew only 23A/197W (8.56v for 3s?). A 12x6 drew, variously, 25A/250W, 27A/270W, 30A ("barely warm") and 38A/400W!

After running some no-loads, I tried 8x4 through 11x7 GWS HD. Since the 11x7 was obviously too big, yet the 10x6 was not pushing it too hard, I then tried a 10x6x3 GWS HD.

The 10x6 GWS HD drew 16.05A/172W @ 10.7v, and the motor did not get much more than warm. Over 32oz thrust @ 47mph is not too bad. The 11x7 GWS HD was too much for it - even though it drew only a little over 20A the motor could not hold rpm and amp draw, and got hot (~75C) fast - the 10x6 x3 GWS HD seems to be a good compromise for getting as much as one can without over-doing it - 36oz @ 43mph from 19.10A/203W.

Cheers, Phil
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Old Mar 15, 2009, 11:30 AM
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Des Moines IA
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http://www.rcgroups.com/forums/attac...mentid=2400695 Does that prop look bent to you? must be an optical illusion. Robert
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Old Mar 15, 2009, 12:18 PM
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Remember it will look odd 'cos it's on backward, as a pusher.
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Old Mar 15, 2009, 11:41 PM
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Livermore, CA
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Hey Doc,
How does this motor hold up against the Turnigy 3530 Sk black and silver outrunner you tested a while back?? Any pros or cons??
And do you think the SK is worth the extra money? Thanks, Butch
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Old Mar 16, 2009, 12:11 AM
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if you still have the setup handy, would you be so kind to try a APC 11x5.5E?
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Old Mar 16, 2009, 04:06 AM
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I have this flying on apc 10x7. We did meter it and on a fresh, but not especially good, 3s pack it was around 20A.
I personally found it an excellent motor, I suspect that unloading will drop the current a lot and an 11x5.5 is on, but would be wary of static testing with that.

Also the efficiency starts to roll off a lot I suspect..if you really want much over 200W, pick a bigger motor.

In my head, this is a 200W/20A motor. Runs best on 3s or 4s. Or if you want to swing very large props slow, 2s, but the power will be less..about 150W at best.
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Old Mar 16, 2009, 01:51 PM
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It seems we agree to agree, Vintage! Why some of these idiots who post "reviews on H-C think they can run 12x6 at 300W-400W I have no clue (and neither do they!). I will try the 11x5.5 APC E just for the heck of it... if that unloads a fair bit in the air, then it would be fine. I did put ?20A max for a reason, and the 10x6x3 got it as close as one can expect to that point (19.10A/203W).
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Old Mar 16, 2009, 02:18 PM
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San Jose, California
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Quote:
Originally Posted by Dr Kiwi
It seems we agree to agree, Vintage! Why some of these idiots who post "reviews on H-C think they can run 12x6 at 300W-400W I have no clue (and neither do they!). I will try the 11x5.5 APC E just for the heck of it... if that unloads a fair bit in the air, then it would be fine. I did put ?20A max for a reason, and the 10x6x3 got it as close as one can expect to that point (19.10A/203W).
Yes 12x6 would be pushing it. I've tried it on 12x6 and that motor would get really hot and smelled after just 10 secs of WOT.

I'm asking because I was running that on 11x5.5 and it does fly fairly well, but back then I didn't have an ampmeter...and have since sold the motor. Now I'm thinking about buying the motor again and using it on 11x5.5

thanks.
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Old Mar 16, 2009, 02:49 PM
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To be honest, if I wanted an 11x5.5 or 11x7 I'd got to the 3536 instead: chances are you could use a smaller battery for the same duration as the efficiency would be better.
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Old Mar 16, 2009, 02:54 PM
myp
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I have this motor on my SA Groove. It draws 21A static WOT with the GWS 10x5 HD. Power was supplied by a fresh set of 25C Xcite 1800 battery. The difference with Dr Kiwi's #s can probably be attributed to the (infamous) Kv variance of HC motors. I did try an APC 11x5.5 on the Groove. It drew 24A static WOT. In the air, I could not tell the difference from the GWS 10x6 (... I am still learning). It did seemed a little easier to hover the Groove probably due to more thrust provided at lower rpm by the 11 in prop.
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Old Mar 16, 2009, 03:01 PM
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21A with a 10x6 GWS HD - maybe your pack was delivering close to 12v at the outset...but I doubt that even that would increase amp draw from 16A to 21A.... or, as you say, your motor might be higher Kv... who knows!
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Old Mar 16, 2009, 03:15 PM
Dude, I do fly all day long!
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San Jose, California
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Quote:
Originally Posted by myp
I have this motor on my SA Groove. It draws 21A static WOT with the GWS 10x5 HD. Power was supplied by a fresh set of 25C Xcite 1800 battery. The difference with Dr Kiwi's #s can probably be attributed to the (infamous) Kv variance of HC motors. I did try an APC 11x5.5 on the Groove. It drew 24A static WOT. In the air, I could not tell the difference from the GWS 10x6 (... I am still learning). It did seemed a little easier to hover the Groove probably due to more thrust provided at lower rpm by the 11 in prop.

I'd love to use the 10x6, but the plane I'm putting this on has a huge cowl and pretty much a 10x6 dosn't push any air.
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Old Mar 16, 2009, 03:22 PM
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You need a lower Kv motor so that you can run a 12"-13" prop.
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Old Mar 16, 2009, 03:31 PM
Dude, I do fly all day long!
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San Jose, California
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Quote:
Originally Posted by Dr Kiwi
You need a lower Kv motor so that you can run a 12"-13" prop.

Well, I'm trying to find the right balance...I don't want to go too low on KV, since I want to go fast, but at the same time want to save on weight as well as good amp draw.

I would guess that on 11x5.5 it's going to hit 20-23 amps somewhere and onloading in the air might be ok.
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Old Mar 16, 2009, 03:33 PM
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It wont be fast on an 11x5.5.

Want more like a 10x10, but in reality, you want a bigger motor.
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