Here is the first set of results for my coaxial benchmarks. A little bit of explanation:
The column called "9x47 Coaxial benchmark" are the real test result for 2 motors in coaxial configuration.
The column called "9x47 Coaxial theoretical" is the sum of 1 x 9x47 pull and 1 x 9x47. I added this column the check the % difference between the coaxial real benchmark results and what theoretical would be possible with 2 coaxial motors if there was no efficiency loss.
The column called "9x47 pull x2" is to compare the difference with 2 pull motors side by side.
The column called "9x47 push x2" is to compare the difference with 2 push motors side by side.
For my Y6 project I need 225 grams of thrust per motor. That is 450grams of thrust per pair. At 450 grams of thrust there is ~9% efficiency loss between the real benchmark and the theoretical value.
|9x47 Coaxial benchmark
|9x47 Coaxial theoretical
(lower is better)