New Aluminum Designs for CNC at Glen-L

Steel and aluminum boatbuilding. See: "Boatbuilding Methods", in left-hand column of the Home page, for information about alloys.

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Kevin Morin
Posts: 636
Joined: Thu Jan 24, 2008 11:36 am
Location: Kenai, Alaska

Re: New Aluminum Designs for CNC at Glen-L

Postby Kevin Morin » Fri Nov 20, 2015 2:27 pm

Chip938, yes I'm very interested (to a fault) in metal boats. The terms used are sometimes left over from hundreds of years of wooden sailing ships, and have little or no connection to modern life an boats; fo'c'sle or forecastle I think comes from nearly medieval sailing ships where the soldiers fought at the bow? The term gun'wale was where the cannon lined up behind a short 'bulwark' not sure on that term... so I'm sorry to be confusing.

Gayle provided a link to a page here on the Glen-L Site with terminology and there are some very good articles by Mr. Hankinson (sp??) about metal one-off skiffs that help with diagrams of the details of construction too.

I'd be happy to revisit any of posts I've made, just use the quote function or cut and paste the line we'll be clarifying and I'll see if I can find a picture or reword what I've written so my ideas are more clearly understandable. I don't mean to be "talking inside Baseball" resulting in confusion, so anytime I post, I have absolutely no problem going back to help make the point more clear.

As to balancing the boat by changing design; yes you could do that, so the designer needs to be included in the changes if you propose them. But... another factor in boat's this size is that two grown men (I'll use me for example) standing at the stern of a boat versus in the bow, is 500 lb shift in balance!!!! And this boat, the SportFisher, will tolerate that shift in wt, so a little addition here and there (within designer agreed limits) is not exactly going to ruin this hull's ability to plane!

In fact stretching these hulls improves their ability to plane in most cases.

Please let me know what could be cleared up, stated differently, made easier by adding synonyms (perhaps?) or other improvements I could help make to the posts?

Cheers,
Kevin Morin
Kenai, AK
Kevin Morin

JaTro
Posts: 23
Joined: Sun Mar 22, 2015 1:34 pm
Location: Praha, CZ, Europe

Re: New Aluminum Designs for CNC at Glen-L

Postby JaTro » Sat Mar 26, 2016 4:47 am

Splendid step into 21st century for GlenL.

Really good idea. Now we need some new designs in steel:-)
Considering popularity of retrolook and nostalgia last days, i believe there is chance
designs as Elco 26 and similar derivatives will be nice addition to quite popular
tugs and trawlers on inland waters.
See below examples on attached links.
http://www.bootsmanufaktur.com/bootsmar ... ker-neubau
http://www.bootsmanufaktur.com/bootsmar ... backdecker
http://www.bootsmanufaktur.com/bootsmar ... ecker-argo
http://www.bootsmanufaktur.com/bootsmar ... t/adelheid
http://www.bootsmanufaktur.com/bootsmar ... iff-thorum

Arent their curves and shapes beautiful? I did checked every corner of internet
and didnt found any offer, just in plywod.

Kevin Morin
Posts: 636
Joined: Thu Jan 24, 2008 11:36 am
Location: Kenai, Alaska

Re: New Aluminum Designs for CNC at Glen-L

Postby Kevin Morin » Sun Mar 27, 2016 2:34 pm

JaTro, Holland (not sure of the real name for the Nethterlands?) has a resident skill and knowledge set among its metal workers that seems to have fostered a round bilge form, steel building industry for small boats? I've seen several series of designs shown online, of very clean hulls with both true wine glass and round or curved bilge forms that are built with regularity- they're common on the canals and waterways there.

What we don't have as widely in the US, is the widely held knowledge of metal working skills needed to build boats. Surely there are many yards that produce fine yachts in metal in the US; however the small boat building market for welded metal seems confined to planing hulls? The nice looking older style boats don't seem popular in the US with the exception of a fairly small niche market of those who's ideas for boats are more nostalgic- than go fast?

Perhaps this boat design impact on the market is generational- where younger boat buyers want to go fast? and only the older generation seem willing to consider designs with cruising speed performance?

Thanks for the links- I enjoyed looking at those designs. Are those designs available for sale in English, with Imperial dimensional drawings and scantlings?

Cheers,
Kevin Morin
Kenai, AK
Kevin Morin

JaTro
Posts: 23
Joined: Sun Mar 22, 2015 1:34 pm
Location: Praha, CZ, Europe

Re: New Aluminum Designs for CNC at Glen-L

Postby JaTro » Mon Mar 28, 2016 3:27 am

Hi Kevin,

Considering dutch approach to thrift (outclassing Scotts:-) they utilized most ecnomical variant, thats for sure.
What is even more valid today in the age of epoxy coatings for steel. I guess resistence stems from old prejudices.
Welders are evrywhere, i guess main problem is lack of plans (sorry for lobbying again:-) because where is offer,
demand will arise!!! Population is aging and you see that small slow tugs and trawlers are popular even in US.
And these backdeckers definitely offer more living space at same length then tugs.
But thats what Glen-L company should consider, maybe they can make a poll between subscribers and fans on forum.
As i understand they are becoming rather plan broker company these days, i am just giving suggestions what i will like
to see next.

Regardings plans in UK, i found once in past some NA offering similar, even seaworthy boat but cannot remeber his name or site.
The site from Berlin is offering newbuild boats per old plans (not sure if they rivet them or weld)
This company is offering kit. http://www.bootswerftschmidt.com/Motoryachts.3.html
More pictures from Netherland at https://www.oudeglorie.nl/schepen-pagina/fotoboek/
Some other old plans at http://www.madlenkapluje.cz/emporium/de ... odni-plany
Personally i really like lines of this boat http://starelode.cz/index.php/forum/22- ... ker-erasim
And regarding speed, this hull can do 25 knots http://www.bootsmanufaktur.com/bootsmar ... ahre-liebe
(with proper engine:-)


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