First of all thanks to Gerardo for the sharing the video.
@bratwurst Let’s separate show facts from (wild and potentially misleading) interpretations.
In the video Gerardo post a bunch of things are show:
- He is using a VESC based architecture ESC and another video suggests the ESC is using the VESC 6 architecture
- He is using the VESC tool
- He is using the MAD M50C35 34KV (like the SP140 does)
- He has a proper test bench that looks safe to operate
- Without load his battery delivers around 71 Volt
- The video does show that a VESC based controller can drive the M50C35 to a certain degree (not stating anything about max values or details about the controller itself)
- The main power draw from the battery shown in the video is 167A @ 67 Volt => 11.2 kW (1:02).
- He runs the engine up to 2233 RPM (1:23), (around 66 Volt * 34 under load)
There is no statement about:
- the archivable max RPM
- the archivable continuous output power
- any power values delivered at the engine shaft - all displayed kW are from the battery (check out the other videos he posted to get more details about the setup)
- the efficiency of the VESC architecture vs. the ADP ESC
- the VESC implementation details, Firmware or settings used (that can make a huge difference!)
If you do have any detailed measurements you can share, then many folks here would be interested to see them.
For me personally running though example math on a bunch of approximations does not help a lot.
I hope Gerardo will share more details on the settings he used and on the maximum archivable values with the VESC setup, especially when pushing it more towards the maximum boundaries.
From first hand experience I can tell that pushing this motor with a VESC 100/250 (FW 5.03) beyond 10kW is rather tricky and does get expensive and dangerous really quickly and without any pre-warning!
As of today my advice is NOT to drive a large outrunner motor (with a high pole count) with a VESC based ESC. The new VESC 100/500 may change it, but this is to be proven.
Of course running far away from the maximums is rather easy to showcase, but our EPPG use case is asking for maximum efficiency and does need peak power in some flight situations.
Stay safe folks & always happy landings!