Not to mention Ice, drag, exposed wiring, not that many amps, and being a
tad bit overpriced.
Greg Ward
Legacy 20B, N178RG Still around and in progress......

----- Original Message -----
From: "Ernest Christley" <echristley@nc.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, January 30, 2011 7:37 PM
Subject: [FlyRotary] Re: Back up air turbine

 

 

I use model airplane electric motors that cost under $30.00. They are rated at 50 amps with burst current to

60 amps. The shaft fits a wide selection of propellers a $4.00 each. They are brushless so nearly no electrical noise and the windings are fixed. The outer case has rows of very powerful magnets that spin in ball bearings around the wound pole pieces.

 

 

This is the size I use and this will pull a 7 pound model very well.

 

The KV rating is actually how many revs you get for each volt applied.

 

Model builders around the world have performed billions of hours life tests including deep dive shock testing into

the earth, and these things hold up. Originally designed as disc drive power for every computer, which has to be electrically noise free (no brush arcing).

Weight is 12 ozs.

 

Lynn E. Hanover