stunthanger.com

Electric Stunt => Gettin all AMP'ed up! => Topic started by: Leo Mehl on April 05, 2012, 10:24:03 AM

Title: Mounting Ideas For Hacker 35 motor
Post by: Leo Mehl on April 05, 2012, 10:24:03 AM

Can someone show me how to mount motor on a profile and a full body Plane. Your no1 dummy on this subject. Leo

Title: Re: Mounting Ideas For Hacker 35 motor
Post by: Tim Wescott on April 05, 2012, 11:08:51 AM

There's lots of pictures out there on folks that have done this.  Go through the "List your setup" thread and you'll see lots and lots of ways to do this.

• Leave out the motor bearers, put in doublers and a strong firewall, mount to the firewall
• Keep fuselage strength all the way to the spinner ring, mount to the spinner ring
• Hog out the bearers for motor clearance, mount the motor to aluminum angle.  Using one just doesn't look strong enough to me: most people that do this must agree because they use them fore and aft, with a bearing mounted on the plate on the bell side of the motor.  Get everything mocked up and aligned, then glue that bearings outer race to its angle with epoxy.

Square corners put a tremendous load on the motor bearings because of gyroscopic effect, so there's quite a few mounting schemes that feature an extra bearing outboard of the bell, to support the shaft.  Bob Hunt mentioned this in his CL Stunt column a couple of years ago: his motor was eating bearings until he added the support to the front of the motor (which was rear mounted).  On the other hand, folks here have reported no problems with just mounting the motor on one end: I think that the high-end motor manufacturers have wised up to the needs of the 3-D RC folks (who put some pretty severe gyroscopic stress on their bearings, too), and have beefed up their motors.

Last fall's (or maybe this winter's) issue of Stunt News showed Tom Morris's method, which is a refined "hog out and make brackets" approach.

Title: Re: Mounting Ideas For Hacker 35 motor
Post by: bob branch on April 05, 2012, 11:34:30 AM

The method I show in both the T-Rex and SV-11 threads here on the electric forum show one method for mounting motors in full fuse planes, one removing motor bearers and one without. The C-14 build thread here in the electric forum shows a profile mount. There are many other methods you will find in other build threads.

bob branch

Title: Re: Mounting Ideas For Hacker 35 motor
Post by: Dennis Toth on April 06, 2012, 03:13:54 PM

Leo,
Contact Tom Morris, he has some excellent mounts for front mounting on profiles. He also has the setup for adding a rear external bearing also.

Best,        DennisT