[PSUBS-MAILIST] SeaQuestor progress

Mon May 6 02:47:45 EDT 2019

Hi Rick, here are photos of the hot wire rig I built. Parts are 300w
computer power supply, use 5v output wire. Two j boxes, one std outlet to
be wired as 5v. Second j box has variable control. Two std two wire
extension cords, i used 12ft., 1 inch pvc pipe, sweeps, and caps. 4
eyebolts with nylock and std nuts. Nicrome wire. I built my large bow to be
able to cut 36"  x 12" deep foam blocks, the two hand held wands i use 24"
wire. The hand held rig runs hotter and cuts faster. The large rig cuts 48"
in about 4 min.  I did not put a bow tightner and so it cuts with slight
arc as it cuts, nothing that has caused any issues with straightness. For
straight edges i used two drywall squares which are 48" long, and with a
couple of 3" screws they are held to the foam,  and i draw the hotwire
against them. It works pretty slick. All of the foam pieces i have cut have
been done with these two rigs. Total cost, less than $30. Built in about an
hour. Have fun.
David

On Sun, May 5, 2019, 12:19 PM Rick Patton via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Thanks David.
> Rick
>
> On Sat, May 4, 2019 at 6:14 PM David Colombo via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> Hi Rick, I'll send pictures and notes tomorrow on my rig.
>> David
>>
>> On Sat, May 4, 2019, 8:25 PM Rick Patton via Personal_Submersibles <
>> personal_submersibles at psubs.org> wrote:
>>
>>> Looking good Dave! I have yet to form my styrofoam block but it's my
>>> next hurdle. I think you explained how you made your hot wire but I can't
>>> find the thread. Would love to know how you did it or let me know what date
>>> you sent it and I'll try and find it in the archives. I have a welding
>>> machine but it may be too much oomph even on it's lowest setting to cut
>>> without setting the styrofoam on fire.
>>> Rick
>>>
>>> On Fri, May 3, 2019 at 11:09 PM hank pronk via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>>> Dave, pretty clever using tin foil.
>>>> Hank
>>>>
>>>> On Friday, May 3, 2019, 9:02:41 PM MDT, David Colombo via
>>>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>>
>>>>
>>>> Hi Guys, working on the first inner mold form for the ballast tank
>>>> today. Sliced the foam to 1/4" sheets, and trapazoid shapes to sit over
>>>> each of the tribs. Then tapped it into place and then spray glued and
>>>> tinfoil applied to protect the foam. Tomorrow a couple of coats of wax and
>>>> then the first layer of matt glass. The inner shell will be attached to the
>>>> exoskeleton to create the ballast tanks. Plan is 4 total, two aft and two
>>>> adjacent to the rear pilot.  Now that i got the form work dialed in, three
>>>> more to go.
>>>>
>>>> David
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