I recently built a little backyard ripper around a Crazybee X on a 78mm frame, using 1102 13500kv motors with Gemfan 2023 props.  It was flying fine for a while but in the middle of maybe its sixth or seventh flight it did a death spiral and now one of the ESCs appears to be done - I've swapped in a new motor but it still doesn't spin.  I wasn't doing anything particularly demanding at the time it did the spiral, the OSD indicates I was drawing about 8 amps at the time.  I'm wondering if this is just bad luck, or is this motor/prop combo too demanding for the board's 5-amp ESCs.  Should I just replace the board, or do I need to reduce the kv of the motors?

Without any accurate motor test charts running these motors on 1s using the exact prop combination it will be hard to guess the actual amp draw and how you will size the ESC's accordingly.

One chart I did find was:


Please note these are using a different set of props and it seems the tests were done on more of a 2s voltage setup. But we can see the high amp draw which on 1S might be even higher.

The CrazyBee X is only rated upto 5A continuous peak 6A (3 seconds): http://www.happymodel.cn/index.php/2020/...toothpick/

Assuming you have the correct current meter scale set to 1175 the high amps on the OSD maybe fairly true and the ESC's are unable to handle the continuous high amp draw.

I am not even going to mention that the CrazyBee AIO boards are a hit and miss in terms of reliability. 

I would suggest you get a good 1S AIO capable of handling higher amps if you plan on flying such a motor/prop combination.

Thanks much for your response @kafie1980.  I have to admit I'm a little out of my depths in terms of matching up ESCs/motors/props.  I was actually following Nick Burns' build on the TKS Rocket Racer frame, but he used 10000kv motors.  Those weren't available when I went to order parts, so I thought I'd give the 13500s a go.  I see now that in the discussion thread accompanying the video above, someone asked about using the 13500s and Nick said he was concerned that the ESCs on the Crazybee X board might not be able to handle the amp draw; it appears that I've now validated his concerns   

Since the board is trashed but the motors are still good, I think I'm just going to upgrade the board to the Crazybee F4 Pro V3 with its 10-amp ESCs, add a VTX and call it good.  Lesson learned...

Thanks again for your help!