Author Topic: Switching an old model question (Maple motor mounts) (Read 1442 times)

Bill Little · « **on:** September 14, 2012, 03:07:52 PM »

OK, Guys, how have y'all gone about removing the maple motor mounts?

Then what do you do to mount the elec. motor?

Thanks!

BIG Bear
RNMM/AMM

Bob Hunt · « **Reply #1 on:** September 14, 2012, 03:30:30 PM »

Hi Bill:

I just use a Permagrit drum sander, put on a mask and have at it. The smell is awful and the dust is a pain, but it only takes about 10 minutes to remove the maple mounts.

I'm attaching a few photos here that make up an essay of sorts without words showing the process. Note that the first couple depict the early setup that had a rear bearing support for the front mounted motor. We found that not necessary...

Later - Bob

Bob Hunt · « **Reply #2 on:** September 14, 2012, 03:34:28 PM »

Here are a few more photos that may help...

Bob

Brett Buck · « **Reply #3 on:** September 14, 2012, 05:22:59 PM »

Quote from: Bob Hunt on September 14, 2012, 03:30:30 PM

I just use a Permagrit drum sander, put on a mask and have at it. The smell is awful and the dust is a pain, but it only takes about 10 minutes to remove the maple mounts.

That Permagrit sander is great! Much much better than the old sandpaper cylinders - eats through maple like a hot knife through butter. Emphasis on "hot", but it doesn't get as hot and burn the wood as badly as the sandpaper.

I have a wide array of the permagrit tools, I don't know how we managed without them.

Brett

Allan Perret · « **Reply #4 on:** September 20, 2012, 09:21:13 AM »

Permagrit drum sander ? Is this something used in a Dremel tool ? What is a good source for these ?

Crist Rigotti · « **Reply #5 on:** September 20, 2012, 09:32:39 AM »

Quote from: Allan Perret on September 20, 2012, 09:21:13 AM

Permagrit drum sander ? Is this something used in a Dremel tool ? What is a good source for these ?

http://www.permagrit.com/product.php?cPath=68&products_id=243

http://shopbvmjets.com/zencart/index.php?main_page=index&cPath=65_70&zenid=3lgkle6l2nb66cb1evla2blnk3

Bill Little · « **Reply #6 on:** September 20, 2012, 11:53:58 AM »

A big thank you to Bob and all. I will go about getting some more of the PermaGrit sanding drums, etc,.

What is the recommended firewall thickness for the front mount? This is for a ".35-.40" equivalent electric system.

Thanks, again!
Bill

Andrew Borgogna · « **Reply #7 on:** September 20, 2012, 12:26:43 PM »

I use 1/4" for anything over a .40 size motor, some will say it's overkill but I have never had a failure.
Andy

Bill Little · « **Reply #8 on:** September 20, 2012, 12:30:23 PM »

Quote from: Andrew Borgogna on September 20, 2012, 12:26:43 PM

I use 1/4" for anything over a .40 size motor, some will say it's overkill but I have never had a failure.
Andy

Thanks, Andy!

The only electric "system" I now have is a front mount motor. Guess I just need to make a really *thick* nose ring.

BIG Bear
RNMM/AMM

Tim Wescott · « **Reply #9 on:** September 20, 2012, 01:45:24 PM »

Quote from: Bill Little on September 20, 2012, 11:53:58 AM

A big thank you to Bob and all. I will go about getting some more of the PermaGrit sanding drums, etc,.

What is the recommended firewall thickness for the front mount? This is for a ".35-.40" equivalent electric system.

Bob Hunt has some really cool-looking fiberglass/epoxy motor mounts. It's 1/8" and predrilled for the motor: all you need to do is get it attached solidly to your airframe.

Bill Little · « **Reply #10 on:** September 20, 2012, 02:28:22 PM »

Quote from: Tim Wescott on September 20, 2012, 01:45:24 PM

Bob Hunt has some really cool-looking fiberglass/epoxy motor mounts. It's 1/8" and predrilled for the motor: all you need to do is get it attached solidly to your airframe.

Thanks for the info, Tim. I'll have to get with Bob as to just what I need to do.

BIG Bear
RNMM/AMM

Andrew Borgogna · « **Reply #11 on:** September 20, 2012, 11:00:14 PM »

Hi Bill
Bob Hunt does have some very nice motor mounts for front mounting. Depending on what kind of motor you have you may be able to reverse the prop shaft in the bell and rear mount the motor. The motor pictured in the PT-19 was originally a front mount that I reversed. What type of motor do you have?
Andy

Bill Little · « **Reply #12 on:** September 23, 2012, 03:00:30 PM »

Hi Andy,

The motor is an Arrowind (came in Brodak Super Clown package) and is a front mount as is.

Thanks!
Bill

Author Topic: Switching an old model question (Maple motor mounts) (Read 1442 times)

Bill Little

Switching an old model question (Maple motor mounts)

Bob Hunt

Re: Switching an old model question (Maple motor mounts)

Bob Hunt

Re: Switching an old model question (Maple motor mounts)

Brett Buck

Re: Switching an old model question (Maple motor mounts)

Allan Perret

Re: Switching an old model question (Maple motor mounts)

Crist Rigotti

Re: Switching an old model question (Maple motor mounts)

Bill Little

Re: Switching an old model question (Maple motor mounts)

Andrew Borgogna

Re: Switching an old model question (Maple motor mounts)

Bill Little

Re: Switching an old model question (Maple motor mounts)

Tim Wescott

Re: Switching an old model question (Maple motor mounts)

Bill Little

Re: Switching an old model question (Maple motor mounts)

Andrew Borgogna

Re: Switching an old model question (Maple motor mounts)

Bill Little

Re: Switching an old model question (Maple motor mounts)