Oooff

My best experience was with HK 2848 2650kv motors (basically rs390-size) in original Taigen 1:3 gearboxes in a Bulldog. 11.1v LiPo... and watch it fly and spit parts allover the place. Indeed a laugh a minute, seeing a tank go like the retro tank-monstertrucks of the 80’s. Sadly, HobbyKing no longer seems to sell those. They were great. One of them is now happily sitting in my Skidoo-MX Snowmobile. Tried 2840 sized 2200kv 12-pole outrunners too. However, they ripped the gearboxes themselves from the chassis.. ooops.. a bit too much torque, I guess.

The biggest problem, oddly enough, was finding affordable 10-tooth 48p pinions drilled for 3.12mm.

In the end, I believe that even for us tankers, brushless will be the way to go. I’ve been eying the DKLM gearboxes for my Leo for some time. Your experiments pulled me over the line. Plan is to stick cheap 3650 sensored motors in them, and go for 21.5-turns. Should do about 2000kv. Loverly fast for the Leo.