Tiger Props have more thrust than Xoars

[Quinton]

I was a bit bored with all this bad weather lately, so decided to do a few tests on my props.
The motors I was using were MT3515-15 which are rated for 900W and 30A, (link below) I used a thrust meter, and measured the other things using a pretty good watt meter
Interesting to see how the 15x5 props compared of the Xoar and T-motor props.

I was very surprised at the 16" T-motor props at 100% as on their site they say 2830g Thrust @100%.
Ill have to retest that one again sometime, when the neighbours aren't in but it is what I seen.
Was thinking if it would be possible to try out 17" props, ecalc doesnt like the idea, but then again it looks possible from these tests..any thoughts?

http://www.rctigermotor.com/html/2013/Professional_0912/50.html

T-Motor 15x5 Props

25% 25.6W 1.11A 270g Thrust
50% 95W 4.2A 900g Thrust
75% 315W 14.0A 2000g Thrust
100% 480W 21.23A 2800g Thrust

Xoar 15x5 Props

25% 24.4W 1.05A 180g Thrust
50% 86W 3.75A 595g Thrust
75% 293W 13.11A 1600g Thrust
100% 434W 19.8A 2430g Thrust


T-Motor 16x5.4 Props

25% 25.5W 1.11A 355g Thrust
50% 110W 4.8A 1060g Thrust
75% 350W 15.3A 2370g Thrust
100% 536W 24.3A 3200g Thrust

 

[yeehaanow]

That's pretty incredible. Thanks for testing. I'm going to have to get some of those!

 

[maxwelltub]

Once I went tiger props I never used anything else. I use the direct to motor mounting method so you lose any vibration from the prop adapter. The other thing that strikes me is the profile. The Tiger props have such a smaller profile that the just look like they would work better. Perhaps in this case they spin faster because they are more stream line. Thanks for the test in any event.

 

[jfro]

T-Motor 16x5.4 Props

25% 25.5W 1.11A 355g Thrust
50% 110W 4.8A 1060g Thrust
75% 350W 15.3A 2370g Thrust
100% 536W 24.3A 3200g Thrust[/QUOTE]

Based on 24.3 appearing to be your max Amps, would you be comfortable running the motors on 30amp ESC's as opposed to 40amps?

 

[Quinton]

T-Motor 16x5.4 Props

25% 25.5W 1.11A 355g Thrust
50% 110W 4.8A 1060g Thrust
75% 350W 15.3A 2370g Thrust
100% 536W 24.3A 3200g Thrust

Based on 24.3 appearing to be your max Amps, would you be comfortable running the motors on 30amp ESC's as opposed to 40amps?

I am no expert on what setups to use, and I do not know what people consider a comfortable gap, but the motor rating is for 30A/900W so you maybe could.
I was using 40A ESCs on the test, and after the tests they were warm to touch, (The motors were cool) but that is expected as there is no "air flow" flowing over them on the bench.
Maybe someone with more knowledge of safety margins could give their thoughts.

Would be good if a group of us could all get together and throw in some money to buy different parts, to do these kinds of tests so we know exactly what we are working with, and what happens when you push things.
Most of us seem to be relying on what everybody else is doing, as its not giving them any problems.

I would LOVE to know this sort of information with for example U5 Tiger Motors, and Kopterworx KW11, is there really any difference.

 

[Lanzar]

Hello,

xoar and tiger prop re 2 differetthing. Xoar is normal prop and tiger is slow fly prop. Ofcorse slow fly have more trust. But motors Will heat a lot in 25 deg celsius. And you Will burn the 30 amp esc.

 

[Quinton]

Hello,

xoar and tiger prop re 2 differetthing. Xoar is normal prop and tiger is slow fly prop. Ofcorse slow fly have more trust. But motors Will heat a lot in 25 deg celsius. And you Will burn the 30 amp esc.

Thanks for chipping in Lanzar, would love to know what "is" considered safe ratio when choosing motors/ESCs and where do you find information on what a props speed limit is, information that is not easily available as far as Im aware..

This is the thing you see, how are ESCs rated there does not seem to be a good standard.
There is a LOT to consider, like what props you use, air temperature, how much cooling you have.
I'm away to do some reading on slow fly/electric props now, so I can arm myself with more information on things that "can" go wrong.

One good thing though about living in the UK, we would never get 25 degree celsius in the first place