REM37BY a Disappointment

[mhorowit]

In the first picture are shown the REM37BY and REM40E.
In the second, the 37BY in shown installed in the front cylinder and the 40E in the rear.
In my ship at least, you can’t latch down the cowling without feeling the bump left by either bent sparkplug wire.
We did finally button her down with the 37BY in the rear cylinder and the original ceramic plug in the front.
For those who have installed the 37BY, any secret? – Mike

[crispy critter]

Re: REM37BY a Disappointment

Mike,
You have to use the 37BY on all the top cylinders and cowl bumps over the front 2 plugs.It won't work any other way unless you use the cans around the ceramic plugs.

[mhorowit]

Re: REM37BY a Disappointment

Kevin - I was led to believe the shorter plugs would preclude the use of cowl bumps for the forward most cylinders.
Let's see if anyone has had a similar experience or has had success. - Mike

[flyguy]

Re: REM37BY a Disappointment

Mike,
Thanks for checking out the BY fit. Confirms what I was starting to guess. I have "cans" on all the top plugs and they just barely fit on the front two. I use rubber pads on the cowling on the front two cylinders or the cans will eat through where they touch.
But all is not a loss. I'm going to order 2 BY's and install them on the back two for better shielding and stay with the "cans" on the front.
The threaded caps for the cans are loose in the threads so I have to find a way to get good continuity there.
I have new harnesses, but the ferrules won't tighten down properly because the flanges are .035 too small and go down inside the can threaded fitting and the mag fitting. Don't buy the ACS harnesses from Aircraft Spruce if you have Eisemann mags. They will not tighten down on the mag connectors OR the "cans." Haven't tried them on shielded plugs yet. (doesn't matter, they won't work on the mag end, anyway.) Have to buy new harnesses now. Maybe I can get some made up using the spiral wire. I'm going to kill this radio noise one way or the other!
Do you have any "cans" you can use?
Using the colder plugs on top should work ok as it is the bottom ones that always load up.
Darryl

[jgerard]

Re: REM37BY a Disappointment

use aluminum foil to build up the threads before buying a new harness

Jason
n43643

[mhorowit]

Re: REM37BY a Disappointment

Mike,
Do you have any "cans" you can use?
Darryl

No, but I see plans for building some in the Tcraft newsletter. That will give me an excuse to learn to braze.

I see Jason has an idea using tinfoil. The idea of something malleable between the two thread is interesting, although I don't know that tinfoil is the way to go; maybe it's just too novel for me to accept at face value;may work perfectly!

I had a problem with fitting the harness to my Bendix mags; turned out the threads on the mag had lots of gunk on them and I was unable to tighten them down by hand and didn't want to use a plier for fear of splitting the aluminum harness fitting. A wire brush solved the problem. But that was the opposite problem you're having.

- Mike

[crispy critter]

Re: REM37BY a Disappointment

Darryl and Mike,
I have an idea that may solve the problem for you both.Why don't you trade 2 for 2.Mike,you trade your front 2 to use in Darryls back 2 and Darryl can trade his back 2(with cans)to use in Mikes front 2...........Does that make any sense that you can understand or am I having another blonde moment?

[mhorowit]

Re: REM37BY a Disappointment

Kevin - I only bought two short plugs, thinking I could get away with standard size shiedded plugs in the back. The short plugs are now in position on the back cylinders- Mike

But Darryl - if you want to sell two 'cans' I'm in the market - Mike

[flyguy]

Re: REM37BY a Disappointment

Kevin,
Thanks for the suggestion, but my threads are passably ok, the nuts tighten down all the way. It is just that the metal piece inside that is crimped to the shield has too small a diameter on their bottom flange. They don't compress against the top of the mag or plug connector, but rather go down inside so they are loose enough to wiggle around even with the nuts tightened down.
But you did give me an idea, I may be able to make a packing gland out of rolled up foil that will be durable enough and take up the space. I've tried aluminum wire and that didn't work.

Mike,
I better hang on to the cans I have, as they are in pretty old and may break in some way. I might have to switch back to cans for all four if the plugs don't work out.
My buddy here has a batch of Aerocoupe parts (lots) and I know those cans were used on some of them. I'll see if he has any.
Darryl

[jgerard]

Re: REM37BY a Disappointment

Darryl, does your buddy with the Aerocoupe parts have any cowl bumps for sale? I would be interested in a pair of used ones.

Jason
N43643

[crispy critter]

Re: REM37BY a Disappointment

Mike,
I have a few used 37BY plugs that are in good condition.You can have a couple if it helps any.
Jason,
You can buy the ercoupe bumps from Aircraft Spruce.I just wish I knew where to find the new tear drop bumps that I see on so many T-crafts.

[Don Eide]

Re: REM37BY a Disappointment

Kevin,

Approximately what size are these tear drop covers?
There is a tear drop cover that is used on the bottom of the boot cowl on
J-3 Cubs to cover a protrusion from I think the heel brakes.
It's 1/2 deep by 1 3/4 x 4 1/2. Do you think it might work?

Don

[Carl Ellis]

Re: REM37BY a Disappointment

Darryl, does your buddy with the Aerocoupe parts have any cowl bumps for sale? I would be interested in a pair of used ones.

Jason
N43643

Jason -

I have a spare set of bumps that are very similar to those on my F-19. I believe they are made out of fiberglass. If I can find them I would be happy to lend them to you to reproduce.

If you are interested I can take a picture for you to confirm.

- Carl -

[mhorowit]

Re: REM37BY a Disappointment

Carl - can you briefly describe the process of reproducing a part from a part?
I may want to try doing that with the fiberglass thing that goes around the air filter.- Mike

[mhorowit]

Re: REM37BY a Disappointment

Mike,
I have a few used 37BY plugs that are in good condition.You can have a couple if it helps any.
.

Thanks for the offer. I'm probably going to be in the market for the older ceramic plugs (C-26/M41E) if my A&P doesn't have them.

And I'll get a chance to learn how to braze. - Mike