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by Kevin Morin
Sat Jun 26, 2021 1:31 pm
Forum: Design Modifications
Topic: Bolero Modifications
Replies: 1
Views: 831

Re: Bolero Modifications

BG2k On the last page of the catalog's review of the plans for this Glen-L design there's a somewhat modified version of the boat. This shows a multi-tone brown paint job and a cabin running all the way forward. So to answer your first question it appears someone has already changed the design to ex...
by Kevin Morin
Thu Jun 24, 2021 1:07 pm
Forum: Design Modifications
Topic: Operating Little Hunk with tiller outboard
Replies: 3
Views: 479

Re: Operating Little Hunk with tiller outboard

Muskie, If the chines of the original lines of the Little Hunk are parallel aft of the widest point (?) then she won't squat much. Even if the frames were stretched out a few inches each - those two chine lines would remain parallel so the wake would leave the hull in more of less straight lines. Th...
by Kevin Morin
Sun Jun 13, 2021 3:04 pm
Forum: Design Modifications
Topic: Modern Hard Top? Any body build one yet
Replies: 8
Views: 1261

Re: Modern Hard Top? Any body build one yet

Ryan, here are some notes regarding Sk'UP technique for hulls just as background. You can use the Sandbox tool to 'curve loft' a set of keel to chine and chine to shear lines giving the surfaces an easier approximation of the surfaces- with triangulation but then; by using Soften the entire Group ca...
by Kevin Morin
Fri Jun 11, 2021 9:46 am
Forum: Design Modifications
Topic: Modern Hard Top? Any body build one yet
Replies: 8
Views: 1261

Re: Modern Hard Top? Any body build one yet

riplash, hoodman, Looking at the Calypso design page and noting the flying bridge seems to imply the design modification of a non-crew occupied space like the models in your OP would be possible w/o radically changing the design's stability? I think the key to any design you come up with would be to...
by Kevin Morin
Tue Apr 13, 2021 6:10 pm
Forum: Design Modifications
Topic: Possible Steel Jet Setter?
Replies: 8
Views: 3889

Re: Possible Steel Jet Setter?

e'tug, glad you 'rested your case'; it will be interesting to see your steel welded jet boat. I did address every single point you made- and countered them and you seem (IMO) the one who misses what's been posted? For a fact, two boats of equal strength aluminium will be lighter by 33% as I've alrea...
by Kevin Morin
Tue Apr 06, 2021 9:53 pm
Forum: Design Modifications
Topic: Possible Steel Jet Setter?
Replies: 8
Views: 3889

Re: Possible Steel Jet Setter?

Kens, with the current models of both circular saws and jig saws, cutting thin steel is pretty easy- not quite as easy as plywood but... coming very close. And cutting small steel pipes, angles, or rectangular tube with slow speed (1300-1400 rpm) cut off saws is very nice! I bought one after using t...
by Kevin Morin
Mon Apr 05, 2021 10:07 pm
Forum: Design Modifications
Topic: Possible Steel Jet Setter?
Replies: 8
Views: 3889

Re: Possible Steel Jet Setter?

E'tug, couple of points that are not mentioned yet. There is a rule of thumb in boat building that aluminium is roughly half the strength of steel at one-third the weight . This means that an aluminium vessel can be built at an equal strength that is only two-thirds the weight of ANY comparable stre...
by Kevin Morin
Sat Apr 03, 2021 1:34 pm
Forum: Design Modifications
Topic: Possible Steel Jet Setter?
Replies: 8
Views: 3889

Re: Possible Steel Jet Setter?

electric tug, My post is to mention the other side of welded aluminium boats, compared to welded steel boats. There are other points of view and there are some very strong market forces that reveal why the difference in the two metals' properties results in a huge market for aluminium boats- both fo...
by Kevin Morin
Thu Mar 25, 2021 10:18 am
Forum: Design Modifications
Topic: Sheeting with aluminum
Replies: 2
Views: 908

Re: Sheeting with aluminum

Brian, there are several metal skin to wood frame matters that will make your project difficult to engineer and build. As Roberta notes, the first issue, regardless of the scantlings of either material will be the issue of developed surfaces. Sheet metal/plate will not cold form to compound curves. ...
by Kevin Morin
Thu Mar 11, 2021 12:56 pm
Forum: Metal
Topic: Stern Designs for Outboard Powered Boats
Replies: 23
Views: 28307

Re: Stern Designs for Outboard Powered Boats

Kens,
the finished rowing dory is shown in a slip as the top photo in the last post above.

I have not used the boat for years, due to health and it sits in a shed waiting someone with more energy and health to use her! She's just an open row boat, not powered.

Cheers,
Kevin Morin
Kenai, AK
by Kevin Morin
Sat Feb 27, 2021 3:21 pm
Forum: Electric Power
Topic: Electric Longboard - Practicing Techniques!
Replies: 8
Views: 6675

Re: Electric Longboard - Practicing Techniques!

18shamic, totally got me with that header/topic name! I was thinking - OK! someone has built a vibrating long board sander that isn't air powered! I have a couple of the pneumatic long boards for sanding and fairing fairly large slightly curved surfaces but the compressor needed is often more than I...
by Kevin Morin
Wed Dec 23, 2020 6:36 pm
Forum: Metal
Topic: aluminum framing choices for floating docs and gangway
Replies: 14
Views: 4018

Re: aluminum framing choices for floating docs and gangway

North, glad that you found some lower cost extrusions that may serve in your projects. It is kind of important for you to note that if someone were to have spent time replying to your request for 'help' in defining scantlings? Their entire contribution would evaporate as you've moved to a 150% chang...
by Kevin Morin
Sat Dec 05, 2020 5:38 pm
Forum: Metal
Topic: aluminum framing choices for floating docs and gangway
Replies: 14
Views: 4018

Re: aluminum framing choices for floating docs and gangway

North, hopefully this image will post and do the 1000 words thing about explanation? https://hosting.photobucket.com/albums/oo273/kevinmorin_photo/25footer/.highres/4thofJuly021.jpg I looked for elements of docks in my photos but didn't find to many. This one does however have one that explains the ...
by Kevin Morin
Sat Dec 05, 2020 1:34 pm
Forum: Metal
Topic: aluminum framing choices for floating docs and gangway
Replies: 14
Views: 4018

Re: aluminum framing choices for floating docs and gangway

North, in most of my dock walk ways, I made the tide adjusting ramps a truss of the handrail and deck. That is I designed and fabbed a trussed 'U' where the walking deck was the bottom of the U and the two handrails the actual trussed frames of the two vertical sides. Here, in SC AK our tides are av...
by Kevin Morin
Sat Dec 05, 2020 1:17 pm
Forum: Metal
Topic: aluminum framing choices for floating docs and gangway
Replies: 14
Views: 4018

Re: aluminum framing choices for floating docs and gangway

North, one direction of the loads (up and down) are being sustained by the individual section modulus of the individual pieces of extrusion. The other direction, horizontal or wind and wave load is being supported by a truss- that is the matrix of welded elements the full width of the dock, walk way...

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