Author Topic: NoblARF Motor Mounts (Read 5235 times)

Garf · « **on:** February 09, 2012, 07:59:47 PM »

Is it possible to remove and replace the motor mounts on a NoblARF? I totally destroyed the first one trying to remove the mounts.

Andrew Hathaway · « **Reply #1 on:** February 09, 2012, 08:36:45 PM »

They'll come out with enough persuasion. Mileage may vary.

http://stunthanger.com/smf/index.php?topic=372.0

Bill Heher · « **Reply #2 on:** February 10, 2012, 06:58:54 PM »

Or cut them off flush with the firewall and use a R/C style motor mount.

Chris Wilson · « **Reply #3 on:** February 13, 2012, 05:56:33 PM »

Or simply leave the stock mounts in place and use some lightweight aluminum angle acting as motor pads along the bearers and then turning 90º down the firewall.
This will make that suspect mount stiffer than a week old corpse and the only down side is that it will lower the engine fractionally.

The same technique can be employed above the bearers also for very little added weight.

This should beat the heck out of digging those bearers out!

Cheers.

wwwarbird · « **Reply #4 on:** February 14, 2012, 10:52:41 PM »

Garf,

Here are some thoughts and ideas...

http://stunthanger.com/smf/index.php?topic=23689.0

Phil Spillman · « **Reply #5 on:** March 04, 2012, 03:17:23 PM »

I too used the RC Mount type of solution and have been quite pleased with my results! Last Sunday i flew this plane with a Brodak .40 up front for 10 flights! It tracked just as well as ever before with no noted extraordinary vibration! Beats all the work of digging out the old wood! I cut the broken old mounts flush with the front fire wall then added 1/8 five ply aircraft plywood front and back using epoxy glue, slow set, followed with 3/8"
triangle balsa braces behind the second ply wood doubler. I used blind nuts to attach the RC mount. Mine just happened to be a Tower adjustable model.

Phil Spillman

Garf · « **Reply #6 on:** January 22, 2013, 09:26:08 PM »

I am completing the first of 2 NoblARF's to get new motor mounts. I use a cutting disc to cut thru the fuselage side to the motor mount. Then use a vice grip to rip the mount out. After a new mount is fitted, I cut a piece of plywood for a doubler and epoxy the new mount and doubler in place. Looks good.

Garf · « **Reply #7 on:** March 10, 2013, 09:47:23 PM »

Both NoblARF's are flying. NoblARF #2 needs some trimming and the EVO 36 needs to be tamed down a little.

Doug Burright · « **Reply #8 on:** April 17, 2013, 11:48:53 PM »

My Top Flite Nobler crashed due to the elevator clevis pin coming out of the clevis. When the pin slid out of the clevis, it fell off of the elevator horn, and no pitch control was available. Awful, awful ARF hardware in that one. Flap and elevator joiner/horns were poorly soldered, also. Just a real disappointment for a Top Flite product to have such inferior hardware in the model.

Geoff Goodworth · « **Reply #9 on:** April 20, 2013, 02:05:53 AM »

Ty, I thought the mounts were a bit sodt on my Brodak Oriental so I left the threaded inserts very slightly proud of the wood and sanded them back flush.

The engine is bolted down hard onto the inserts—none of that sinking feeling.

Garf · « **Reply #10 on:** April 24, 2013, 06:18:34 PM »

Quote from: Garf on January 22, 2013, 09:26:08 PM

I am completing the first of 2 NoblARF's to get new motor mounts. I use a cutting disc to cut thru the fuselage side to the motor mount. Then use a vice grip to rip the mount out. After a new mount is fitted, I cut a piece of plywood for a doubler and epoxy the new mount and doubler in place. Looks good.

The mounts in NoblARF#2 has been crash tested. The same type of crash that broke the original mounts didn't bother the replacements.

Garf · « **Reply #11 on:** December 09, 2013, 05:26:45 PM »

The controls in the NoblARF #2 have been changing. I held the flaps in neutral and the leadout length is very uneven. also when the flaps are held in neural, the elevators are slightly down. I need to get to the bellcrank to fix this but the bellcrank is under the fuselage. This will be major surgery, so I think I would be better off to slice the fuselage off and turn this into a profile.

afml · « **Reply #12 on:** December 10, 2013, 07:26:11 PM »

Hmmmm......
Did notice that 'Both NoblARF's' were sitting atop the trash can.....
Hope all turns out well!
One pic has a piece of tubing, running from the muffler, wwaayyyy down the fuselage to???
Tom Dixon did a few mods to his and it flew quite well.
"Tight Lines!"

Wes

Garf · « **Reply #13 on:** December 12, 2013, 09:28:18 PM »

NoblARF#2 has been shelved till I get some other repairs done. #2 requires major surgery.

Garf · « **Reply #14 on:** December 15, 2013, 12:45:56 PM »

Quote from: afml on December 10, 2013, 07:26:11 PM

One pic has a piece of tubing, running from the muffler, wwaayyyy down the fuselage to???
"Tight Lines!"
Wes

That is the overflow fitting. This is what happens when not enough planning is used.

Garf · « **Reply #15 on:** December 15, 2013, 01:01:03 PM »

Quote from: afml on December 10, 2013, 07:26:11 PM

Hmmmm......
Did notice that 'Both NoblARF's' were sitting atop the trash can.....
"Tight Lines!"
Wes

That happens to be the best spot to take pics as far as light goes.

afml · « **Reply #16 on:** December 15, 2013, 03:02:34 PM »

Thanks for the pics!
Explains a lot.
Really like the Bulkhead Fittings.
Keep us posted on your progress.
You previously mentioned the Evo 36 needed to be 'tamed down' a bit.
How did you accomplish this?

Thanks again for the explanation & the pics!
"Tight Lines!"

Wes

Garf · « **Reply #17 on:** January 05, 2014, 08:18:12 PM »

Quote from: afml on December 15, 2013, 03:02:34 PM

You previously mentioned the Evo 36 needed to be 'tamed down' a bit.
How did you accomplish this?

Thanks again for the explanation & the pics!
"Tight Lines!"
Wes

I changed it for an OS 35S ABC.

Garf · « **Reply #18 on:** January 05, 2014, 08:23:05 PM »

I managed to break the heavy duty replacement motor mounts today. I doubt that I will be able to replace the mounts a second time.

55chevr · « **Reply #19 on:** January 05, 2014, 08:47:36 PM »

Make a profile fuselage and it will fly again.

Joe

Tim Redelman · « **Reply #20 on:** January 10, 2014, 11:35:10 PM »

This is how I did mine. 43 oz's with Brodak 40

Tim