{"id":311,"date":"2016-12-18T17:32:19","date_gmt":"2016-12-18T17:32:19","guid":{"rendered":"http:\/\/kmbcmodelboatclub.com\/?page_id=311"},"modified":"2016-12-20T08:18:27","modified_gmt":"2016-12-20T08:18:27","slug":"motors-and-batteries","status":"publish","type":"page","link":"https:\/\/kmbcmodelboatclub.com\/index.php\/the-knowledge\/motors-and-batteries\/","title":{"rendered":"Motors and Batteries"},"content":{"rendered":"

BRUSHLESS MOTORS<\/u><\/p>\n

As mentioned during my presentation, my notes are primarily to help you select, install and operate a brushless motor suited to your application \u2013 a quick search via Google will find many articles on the operating principles, perhaps even too much information !<\/p>\n

Motor Types + Specifications :<\/em><\/p>\n

Outrunner<\/em> \u2013 identified by the outer casing containing magnets rotating around the electronic stators or poles are they are often termed. Designed originally for aero\/heli use with an integral cooling fan and the drive shaft typically exiting through the mounting face (if the motor shaft exists the other side then just turn the motor around on the bracket as shown in the photo below)<\/p>\n

\"\"<\/p>\n

Inrunne<\/em>r \u2013 identified by the outer casing being static which houses the electronic stators with the magnets being attached to the inner rotating drive shaft. Suited to boat operation providing a water cooling jacket or coil is fitted around the casing as there is no provision for fan cooling<\/p>\n

Similarly east to install<\/p>\n

\"\"<\/p>\n

Pros and Cons<\/em> :<\/p>\n

#\u00a0 Outrunners have more torque due to the increased distance from the drive shaft to the magnets ie \u00a0greater leverage is applied to the moving member (if you recall a bit of your schoolboy physics!)<\/p>\n

# Inrunners are quieter but many boaters like myself find the turbine like howl of a well installed Outrunner at speed addictive\u2026.<\/p>\n

In a twin or triple installation each brushless motor requires its own speed controller, so factor the cost and space needed when planning your power set up, control being via either multiple recievers (unusual and costly) or simply placing one or re more Y leads between the receiver each speed controller to link each to the receiver throttle signal<\/p>\n

Motor Selection<\/u><\/em><\/p>\n

I have tried here to compare some types of brushed motors most members will be familiar with and indicate a brushless equivalent providing the similar – or ususally significantly more power and\/or lower battery power consumption \u2013 to take its place<\/p>\n

The key pieces of info you need to look at when selecting a brushless motor are its dimensions and \u00a0KV rating :<\/p>\n