Brushed DC Motor Tests

An analysis of brushed DC motors and propellers used in model aircraft and vehicles. The purpose of this repository is to collect information about the performance of DC motors so that hobbyists and creators can design better vehicles. Included in this repository is a spreadsheet with 9 different motors tested against a number of different propellers. In each test a recording of the max thrust, voltage, amperes, and decibels is made. You can use the information to find the best brushed DC motor and propeller for your needs. Also included in this repository are a set of models that were used to build a thrust test stand for small brushed DC motors.

Creators

Victor G. Brusca
Carlo Bruscani

Brushed DC Motors Tested

1. 6.0mm x 14.0mm w 0.8mm shaft, ~48K
   
2. 7.0mm x 16.0mm w 0.8mm shaft, ~11K, Geared
   
3. 7.0mm x 16.0mm w 0.8mm shaft, ~64K
   
4. 7.0mm x 16.0mm w 1.0mm shaft, ~48K
   
5. 7.0mm x 20.0mm w 1.0mm shaft, ~64K
   
6. 7.0mm x 20.0mm w 1.0mm shaft, ~64K
   
7. 7.0mm x 20.0mm w 1.0mm shaft, ~64K
   
8. 8.0mm x 16.0mm w 0.8mm shaft, ~55K
   
9. 8.0mm x 16.0mm w 1.0mm shaft, ~64K
   
10. 8.5mm x 20.0mm w 1.0mm shaft, ~55K
    

Propellers Tested

0. 40mm wide, transparent gray 2 flat sharp 1mm shaft
   
1. 41mm wide, transparent red 3 flat sharp 1mm shaft
   
2. 46mm wide, blue 2 none rounded 1mm shaft
   
3. 55mm wide, red 2 rounded rounded 1mm shaft
   
4. 55mm wide, black 2 flat squared 1mm shaft
   
5. 66mm wide, clear 2 flat squared 1mm shaft
   
6. 76.3mm wide, transparent orange 2 flat sharp 1mm shaft
   
7. 76.3mm wide, black 2 rounded squared 1mm shaft
   
8. 77mm wide, black 2 rounded sharp 1mm shaft
   
9. 46mm wide, black 2 flat rounded 0.8mm shaft
   
10. 46mm wide, black 2 rounded rounded 0.8mm shaft
    
11. 31mm wide, transparent gray 3 flat squared 0.8mm shaft
    
12. 31mm wide, transparent purple 4 flat squared 0.8mm shaft
    
13. 140mm wide, black 2 none rounded 1mm shaft
    

Test Stand Models

Included are the original CAD files for the brushed DC motor test stands. There are three different pressure arms, for putting pressure on a scale at different heights, included. There are also four motor holders of varying sizes included. The stand can be assembled and disassembled many times over and supports movement in both the pull and push directions. Not every motore has it's own perfect motore holder so find the closest match and use a bit of tape to secure the motor. You should also always secure the wires to help prevent motor twist up and wire damage in the case of motor holder slippage.

Top 10 Non-geared Results

Motor Name	Propeller Name	Max Thrust(g)	Amps(A)	Score(Max Thrust / Amps)
0: 7x16 w 1mm shaft	46mm wide blue 2 none rounded 1mm shaft	12	0.7	17.14
0: 7x16 w 1mm shaft	76.3mm wide black 2 rounded squared 1mm shaft	16	1.1	14.55
0: 7x16 w 1mm shaft	55mm wide red 2 rounded rounded 1mm shaft	13	0.9	14.44
0: 7x16 w 1mm shaft	40mm wide transparent gray 2 flat sharp 1mm shaft	10	0.7	14.29
0: 7x16 w 1mm shaft	66mm wide clear 2 flat squared 1mm shaft	14	1.0	14.00
6: 7x20 w 1mm shaft	46mm wide blue 2 none rounded 1mm shaft	20	1.5	13.33
8: 8x16 w 0.8mm shaft	46mm wide black 2 rounded rounded 0.8mm shaft	20	1.5	13.33
0: 7x16 w 1mm shaft	41mm wide transparent red 3 flat sharp 1mm shaft	12	0.9	13.33
2: 8.5x20 w 1mm shaft	40mm wide transparent gray 2 flat sharp 1mm shaft	21	1.6	13.13
0: 7x16 w 1mm shaft	55mm wide black 2 flat squared 1mm shaft	13	1.0	13.00

Top 2 Motor/Propeller by Score, Max Thrust, and Amps

Motor Name	Propeller Name	Max Thrust(g)	Amps(A)	Score(Max Thrust / Amps)
1: 7x16 w 0.8mm shaft	31mm wide transparent gray 3 flat squared 0.8mm shaft	15	1.4	10.71
8: 8x16 w 0.8mm shaft	31mm wide transparent gray 3 flat squared 0.8mm shaft	10	0.8	12.50
2: 8.5x20 w 1mm shaft	40mm wide transparent gray 2 flat sharp 1mm shaft	21	1.6	13.13
3: 7x20 w 1mm shaft	40mm wide transparent gray 2 flat sharp 1mm shaft	17	1.6	10.63
9: 7x20 w 1mm shaft	40mm wide transparent gray 2 flat sharp 1mm shaft	16	1.4	11.43
5: 6x14 w 0.8mm shaft	46mm wide black 2 flat rounded 0.8mm shaft	10	1.3	7.70
1: 7x16 w 0.8mm shaft	46mm wide black 2 rounded rounded 0.8mm shaft	22	1.7	12.94
5: 6x14 w 0.8mm shaft	46mm wide black 2 rounded rounded 0.8mm shaft	10	1.3	7.69
8: 8x16 w 0.8mm shaft	46mm wide black 2 rounded rounded 0.8mm shaft	20	1.5	13.33
0: 7x16 w 1mm shaft	46mm wide blue 2 none rounded 1mm shaft	12	0.7	17.14
6: 7x20 w 1mm shaft	46mm wide blue 2 none rounded 1mm shaft	20	1.5	13.33
7: 8x16 w 1mm shaft	46mm wide blue 2 none rounded 1mm shaft	20	1.9	10.53
2: 8.5x20 w 1mm shaft	55mm wide red 2 rounded rounded 1mm shaft	26	2.0	13.00
6: 7x20 w 1mm shaft	55mm wide red 2 rounded rounded 1mm shaft	21	1.7	12.35
7: 8x16 w 1mm shaft	55mm wide red 2 rounded rounded 1mm shaft	24	2.2	10.92
9: 7x20 w 1mm shaft	55mm wide red 2 rounded rounded 1mm shaft	20	1.7	11.76
3: 7x20 w 1mm shaft	66mm wide clear 2 flat squared 1mm shaft	24	2.1	11.43
0: 7x16 w 1mm shaft	76.3mm wide black 2 rounded squared 1mm shaft	16	1.1	14.55

Demo of Thrust Test Stand in Use

Enjoy!!