[PSUBS-MAILIST] DSV Aquatic update

[Cliff Redus via Personal_Submersibles]

Progress!  Good to see the boat on the new trailer.  Where are you going to
do the makeover on the boat?

Best Regards

Cliff

On Tue, May 29, 2018 at 10:06 AM, Jon Wallace via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Moved the submarine yesterday (Monday 5/28) from the original 1979 steel
> trailer to the new aluminum trailer.  Working alone, it took me 8 hours to
> build the gantry, lift the sub, and swap out the trailers.  No issues
> however and it all went pretty smoothly.  I have to admit I was a bit
> nervous about lifting the sub on wood beams, but I had used an online
> calculator (http://forestryforum.com/members/donp/beamclc_ctrpointload.htm
> )
> to determine timber sizes and it turned out to be accurate.  If there was
> any deflection in the beams it certainly was not noticeable to the naked
> eye.
>
> The submarine is completely stripped and is as light as it is ever going
> to get.  I have no idea what the actual weight is but I calculated
> approximately 2500 pounds based upon the amount of steel in the various
> parts (main cylinder, heads, conning tower, battery pods, etc).  I decided
> to split that weight between two beams rather than just one so I could use
> lighter material.  Each beam was created from laminating two 2x10x10 full
> dimensional planks purchased from a local saw mill which provided a full
> 4x10x10 beam.  Posts were created by laminating two 2x6x10 planks together
> to provide full 4x6x10 material.  Lots of bracing here, there, and
> everywhere.  Looks ugly, but is very solid.
>
> I used two 2-ton "come along" manual winches attached to the fore and aft
> lifting rings then lifted/lowered equally between the two winches.  Once
> free hanging, the sub did sway a bit since I had to lean on it to get to
> the winches.  This also made me nervous since too much swaying could bring
> the gantry down but I was easily able to counter and damper the small
> sway.  I probably would not have done this on a windy day.
>
> The old and new trailers are the same height so I only needed to lift the
> sub about four inches so that it was free of the c-channel that it rests
> inside.  Then it was simply a matter of pulling the old trailer out from
> underneath, backing the new trailer underneath with proper placement, then
> lowering the sub back down.  Happy to have the sub on a road worthy trailer
> now.
>
> Videos uploaded for your viewing pleasure
>
> Episode 3 - Trailer Swap - https://www.youtube.com/watch?v=FLbbFUlKHkU
>
> Episode 2 - More Trailer Mods - https://www.youtube.com/
> watch?v=e4d0nzWIgYo
>
> Episode 1 - Fender Repair - https://www.youtube.com/watch?v=zh3d5BI1vig
>
>
>
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>
>
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