This bearing combination also applies to the Multiplex-Funcopter, model #21 3001-AK, #26 3001-RR. Application is
Main rotor shaft; 2x 5-11-4mm bearings
Tail rotor shaft; 1x 5-11-4mm bearing & 1x 7-13-4mm bearing.
(Same application as the corona 120M)
Also,the funcopter Swashplate bearing is a 15-21-4mm bearing.
I just purchased bearings for my corona 120M (electric motor)
didn't buy H36-10. Instead I'm trying a bigger bearing (MR685-2GS) on the Main rotor shaft bearing that supports the main drive gear. I hope it works. Boca has great products at an excellent price.