ESC: Turnigy Plush 25 A
Motor: RCTimer BC2836-11
Prop: Graupner 11x5 Elektro-Prop
Battery: Zippy Flightmax 5000 mAh 15C 4s

Averaged at about 125 W/kg.

Please, anybody tell me how many max thrust I can get from this motor on 3s?
Or anybody had graphs with 3s, not 4s? Thanks.

are you going to test with other prop`s 10.4.5 or 12x4.5.
3s is Wat the most use.

Hi, no, sorry, I don't have any 3s power units available. Or other props. The best I can do is hook it up to a car battery (close enough to 3s), but that would skew the results because of their low internal resistance (voltage wouldn't drop visibly), rendering the experiment useless.

So 8 of these will lift 12.8 lbs max? Not to bad.

When considering head-room however, and the fact that these motors would be at 100% to lift the given amount of 12.8 lbs, they could not function on a multi-copter at this capacity correct? So if staying with a target weight lift of 13 lbs the BC3536-9 910kv motors would be a better solution correct? Or have a BC3530 rewound to 700kv and run at 4s? I am considering this solution but need input from those more experienced.

8 would lift 15 lbs easily, they are 200W motors and I brought them to only 108 W (750 g). I couldn't go higher otherwise my 10A amp-meter would go poof :-)

Originally Posted by tori3

8 would lift 15 lbs easily, they are 200W motors and I brought them to only 108 W (750 g). I couldn't go higher otherwise my 10A amp-meter would go poof :-)

REALLY? Thats very interesting news. I was just about to pull the trigger on 70 amp esc's and 3548 motors at 150 grams each. I need to look into this more.

Yes, really from looking at the graph the thrust-power relationship is nearly linear. You can estimate that top thrust would be around double the 100W value, that is around 3 lbs (1.5 kg). That times 8 and you get 24 lbs and 1.6 kW (110ish A).

Of course that's just a rough estimate, so take it with an appropriately large grain of salt

I am also testing this motor with different props, as you can see from the picture, the 10x4.5 comes close to Graupner , but the APC 12x3.8 is not very efficient on this motor.
I use mystery blue series 30A ESC

Originally Posted by krial

I am also testing this motor with different props, as you can see from the picture, the 10x4.5 comes close to Graupner , but the APC 12x3.8 is not very efficient on this motor.
I use mystery blue series 30A ESC

can you show the data for the 12x38?

I have 4 of these motors spare (28-36 750kv) 5 minutes test use only

£8 each UK

I dont have equipment to log data, so I film the test run, the above picture shows both props, 10x45(top) 12x38(bottom).

Originally Posted by krial

I dont have equipment to log data, so I film the test run, the above picture shows both props, 10x45(top) 12x38(bottom).

ok thanks, I was not sure what props the picture was for, I missed the title of the picture
.


cheers

Josh

Since HK just released some NTM motors that are perfect for quads, someone needs to test them out. Slightly smaller than the RCTimer motors but I think the quality will be higher, as well as efficiency.

http://www.hobbyking.com/hobbyking/s...uct=16229&pb=1

I can't speak for someone elses setup but I get 992.2g thrust at 12.4V 18.2A with 2830 750kv motor spinning APC12x3.8 prop. It is not the same motor but usually a set rpm for a given prop produces close to same thrust not taking efficiency into account.