Re: [PSUBS-MAILIST] Phone # for Mine sweeper hulls

[MerlinSub@t-online.de (Carsten Standfuß)]

Hi Gene - ..after 50 years.. ? They are from 1951 ? .. 

No real idear about removing the glue - maybe sand- or glas blasting ? 

Maybe heat is one way but .. 

Some special firms here blasting with frozen CO2 - primilery
to prevent to remove later so much old dirty waste sand. But also 
to make for examle the old painting on a structure very cold and "hard"
so it could easy remove without to dammage the surface below. 
Maybe this process would make the glue also very hard and easy to
remove. 

Another idear is simillar - carry the both half hulls in a coldstore
lorry
to a sandblasting firm far away - keep the termostat regulator down to
the cold end and if you arrived on the firm - work quickly. 

Or carry the Hull to Dale's place next winter.. the job can be done than 
just outside .. 

see you and good luck with you project - Carsten


HUNTR2@aol.com schrieb:
> 
> A chap "down under" wanted the phone # for the place that sells the
> mine
> sweepers.  It is Lague Sales,  Robert Lague   209-825-2582.   I think
> he
> wants $250 each.  If you work out a deal with him to ship one to you,
> I'd be
> glad to go and pick out one for you.  (Just to make sure you get the
> best of
> the pile).  Some of them have some pretty deep marring where they were
> 
> dragged on the sand.  I'd look for one with no damage.
> 
> I cut one in half the other day and took out the foam blocks.  They
> weigh 600
> lbs, total, without the foam.  Did the math calcs to estimate how much
> it
> would displace.  Figured to be 4400 lbs on paper.   After I cut it at
> "station 10", I stood each half on a large scale and filled them with
> water.
> The front 10ft. weighed in at 3200 lbs and the tail (8'10") weighed
> 1100 full
> of water.  Total weight =  4300 lbs.  The first 14" of the nose is
> sealed
> from the rest and did not fill with water.  I don't know if it is full
> of
> foam or just empty.  There is a 4 inch steel tube across the inside at
> 
> station 6.  There is a glue substance (very sticky yet after 50 years)
> on
> parts of the inside, apparently to hold the foam in place during
> assembly.
> Tested acetone, alcohol, gasoline, detergent, and tolulene.  Only
> tolulene
> will cut the glue and then only with scrubbing.  Heat softens it so I
> used a
> heated pressure washer to get alot of it out but that was a VERY slow
> and hot
> process.    I'm not willing to climb inside with a gallon of tolulene
> and
> start scrubbing away.
> Any suggestions?
> Gene