Hoverup
Elite Veteran
Location: Gulf Coast
| Right now the only source of 48p pinions that are the correct length to drive the main spur and crown T/R gear is Protech in Belgium. They are a distributor and you may be able to order what you need from Midland Helicopters in the UK. An alternative is to buy 2 shorter pinions and stack them to do the job from Hobby Lobby, ncphobbies.com or sheldonshobbies.com
You will need to verify the shaft diameter on your Hacker B 20 22S. The older versions had 2.3mm dia. shafting and the newer ones can be had with 2mm dia. shafting.
If you have the 2.3mm shaft then you may chose to use the 10t pinion that comes on the stock brushed motor. Be aware it's a bear to remove this pinion.
Cheers - Boyd
AMA80393
IRCHA 3355
Major USAF
Retired
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