[TheForge] costs of ownership question

[Ron Childers]

Sounds like the old drone target engines designed for limited life used
on a tether of half inch nylon line. These were gas powered but if
rebuilt correctly some of the guys powered ultra lights with them. This
was in the late '70's & early '80's. @ Egland AFB
..
-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of terry l. ridder
Sent: Tuesday, September 11, 2012 6:45 AM
To: Blacksmithing List Sponsored by ABANA
Subject: Re: [TheForge] costs of ownership question

hello ron;

On Tue, 11 Sep 2012, Ron Childers wrote:

>
> Only 500 hours for a diesel is ridiculous;
>

500 hours.

>
> Did you mean 50,000?
>

No.

>
> What kind is it?
>

they are some southeast asian make during the late 40s or early 50s.
WWII vintage. they could be newer just that era of design.

we normally can get parts for them from either south korea, japan, or
taiwan.

the oddest suggestion that i have heard so far was from an old marine
mechanic; that the auxilary diesel engines are located in a higher than
normal magnetic field perhaps due to parts of the ship being magnetized
over the years.

the piston moving in the magnetic field is generating it's own magnetic
field and currents. which is causing the piston rods to bow ever so
slightly. this slight bow in the piston rods is causing the cast iron
sleeves to wear out-of-round. the old marine mechanic suggested that i
have the entire ship degaussed. needless to say that is not going to
happen anytime soon. degaussing a ship is not cheap by any standard.

the longer the piston rod the more the rod would have the ability to
bow.

this old marine mechanic suggested that if possible rotate the mounting
of just one of the engines 90 degrees and see if the wear on the cast
iron sleeve also rotates 90 degrees. he said that would point to
external magnetic fields causing the excessive wear on the engines.

>
>

--
terry l. ridder ><>
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