Thorp Air Command - T18.net
http://t18.net/thorpforum/

How to hang an engine
http://t18.net/thorpforum/viewtopic.php?f=35&t=7191		 Page 3 of 3
Author:  dickwolff [ Fri Aug 30, 2013 12:11 pm ]
Post subject:  Re: How to hang an engine
I used the Aircraft Spruce Heavy Duty homebuilders mounts, and I also used an Armstrong torque wrench with the clicking elbow.

The pads on my mount are a little off, which made the process even worse. In addition to patience, muscle, and cussing, I used a "bullet" from Avery Tools and a drift I made out of 1/4 x 1" aluminum. I used the drift to "pop" the pucks into place in the mount with a light hammer tap from the side. Worked well.

You can make a bullet out of a 7/16 bolt from the Thorp T18 department at the Home Depot. (Don't use the ones from the S18 department; they're too wide.)

D
Author:  bfinney [ Fri Aug 30, 2013 12:43 pm ]
Post subject:  Re: How to hang an engine
That's what I used on my aircraft, just looked at the invoice and at the time they were $285 for a set, 8/09. As for installing them I had my A&P do it at annual time. He has a niffty device that holds the prop in a cradle with a hydraulic jack under it, snug it up loosen up the top bolts let the front of the engine down a bit and presto chango the top is done reverse for the bottom.
Author:  Fraser MacPhee [ Fri Aug 30, 2013 3:08 pm ]
Post subject:  Re: How to hang an engine
Well, they are on and it improved the cowl alignment a bit, but not near what I'd hoped, so am gonna shim them in a few days.

Lee....here is what I put on - they are "very similar" to the Lord J7402-5s that were on there. Note the price.

http://www.aircraftspruce.com/catalog/e ... afocal.php
Author:  Bill Williams [ Fri Aug 30, 2013 3:20 pm ]
Post subject:  Re: How to hang an engine
Some mounts have one half harder than the other. The hard one goes on the back side of the mount on top and the other hard half goes between to case and mount on the bottom. Sometimes you have to shim with washers.
Author:  fytrplt [ Fri Aug 30, 2013 8:23 pm ]
Post subject:  Re: How to hang an engine
My set up has two aluminum washers under each of the bottom mounts. This cured the apparent sag. New mounts will sag about 1/4" in the first hundred hours. Ask how I know at our next face-to-face.
Author:  Fraser MacPhee [ Fri Aug 30, 2013 9:54 pm ]
Post subject:  Re: How to hang an engine
Well, the immediate impetus to change them was the alternator boring a hole through the bottom cowl - I'm sagging down and to the right...???....I'm reluctant to pull those bolts again as that was a headache (good idea about the bullet Dick - I used a long AN-5 as an aul(S) and align it for the AN-7) and just might notch the washers and just loosen and slide them in. I took an hour a corner with an engine hoist to get them in and torqued to 38 foot pounds. Will wait a few days (as all elastomers if I remember correctly have a relatively high creep coefficient) and re-torque the bottom to 38 foot pounds and the top to 40 foot pounds, unless advised otherwise.
Author:  fytrplt [ Sat Aug 31, 2013 8:12 am ]
Post subject:  Re: How to hang an engine
My solution to the alternator wear-thru was to "borrow" a large metal spoon from my wife's kitchen inventory and mold a teardrop shape out of fiberglass. This was epoxied over the offending hole and smoothed in. A little paint and "voila!" The hard part was getting the spoon cleaned and replaced in the kitchen inventory without notice.
Author:  Fraser MacPhee [ Sat Aug 31, 2013 8:14 am ]
Post subject:  Re: How to hang an engine
NAUGHTY!!!
Author:  Rich Brazell [ Sat Aug 31, 2013 4:33 pm ]
Post subject:  Re: How to hang an engine
Bob's idea was what I was going to suggest , except go to the 99 cent store and buy the spoon and when you are done take it back for a refund ! ;) BOOM !

RB O:-)
Author:  James Grahn [ Sat Aug 31, 2013 11:16 pm ]
Post subject:  Re: How to hang an engine
I used a golf ball. Worked fine but needed smoothing on the outside.
Cubes
Author:  Fraser MacPhee [ Sun Sep 01, 2013 8:18 am ]
Post subject:  Re: How to hang an engine
You should have left the (golf ball) dimples on that dimple......coulda gained a knot or two.....though your plane would probably have a slice in it.
Author:  James Grahn [ Mon Sep 02, 2013 10:15 am ]
Post subject:  Re: How to hang an engine
Oh it slices!
Page 3 of 3 All times are UTC - 6 hours [ DST ]
Powered by phpBB® Forum Software © phpBB Group
https://www.phpbb.com/