Bolger Micro Trawler
Doug
major factor in that design to provide standing room for the pilot in
the wheelhouse? I assume the pilot would stand in that wide keel
section...or is the hull just engineered this way? Wierdest thing I've
ever seen...but I kinda like that boat. Seems like it would be hard to
turn with that wide, sharp-edged keel section though...anyone know?
And that boat planes and goes 25mph?? Very interesting design...can
anyone tell me how it works and why it is the way it is? Thanks.
Doug
cbetts
designed a lot (20? 50?) of boats using it. There are a few things going
on:
On smooth water, the boat planes on the keel, with minimal power, and the
rest of the hull clear of the water. Very little wetted surface, sort of
like an outboard motor on a waterski.
In a chop, the cutwater provides some buoyancy way out front. The narrow
profile slices into the wave, and gradually lifts the boat, with little
slamming. The upper hull provides immense buoyancy should you run into
something a little bigger.
The straight, narrow keel provides sure tracking regardless of conditions.
Difficult to turn? well, it may not do well in a high speed slalom...
At rest, the wide upper hull is immerse a couple inches, providing a
rock-solid platform.
Bolger has taken one-off amateur design to its logical extremes. Plywood is
an ideal one-off material, so why not make the best of it boxiness! Want to
see a really radical version of this approach? Watervan, at
http://photos.groups.yahoo.com/group/Bolger2/lst
Check out the Bolger message board;
http://groups.yahoo.com/group/bolger/messages ; you may need to register
with Yahoo.
--
Curtis
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"Doug" <tumbl...@msn.com> wrote in message
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Al
> http://photos.groups.yahoo.com/group/Bolger2/lst
bloody hell!!
is that thing stable in anything other than a flat calm? it looks like
a watergoing caravan, and my experience of caravans is that they're only
stable when you've got each corner supported... interesting concept
though... I'd be really intrigued to take a trip in her...
Al
Doug
Thanks for the informative reply...what a great design. BTW, remember
when I said the MT hull was the wierdest thing I'd ever seen? Well,
that was before I looked at the Watervan! Seriously though, that
Watervan is actually the coolest looking houseboat I've ever seen.
Doug
Backyard Renegade
>
> Bolger has taken one-off amateur design to its logical extremes. Plywood is
> an ideal one-off material, so why not make the best of it boxiness! Want to
> see a really radical version of this approach? Watervan, at
> http://photos.groups.yahoo.com/group/Bolger2/lst
>
>
Scotty
Brian
actually like that water van! Nothing else like it that I've ever seen, but
it looks like the ultimate "camp on the water" vehicle. I almost wish I had
one! It's a new concept in boat design and basically fills the role of a
camper, but it floats .... go camping the in the 'camper' on a trailer, or
put it in the water and camp on the anchor! Kewl!
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"cbetts" <curtisbet...@mediaone.net> wrote in message
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P.C.
"Brian" <bria...@credenceNSvisionNS.com> skrev i en meddelelse
news:J2wa8.49784$Pz4.272395@rwcrnsc53...
> Always one to complain about Boldger Boxiness and lack of aesthetics, I
> actually like that water van! Nothing else like it that I've ever seen, but
> it looks like the ultimate "camp on the water" vehicle. I almost wish I had
> one! It's a new concept in boat design and basically fills the role of a
> camper, but it floats .... go camping the in the 'camper' on a trailer, or
> put it in the water and camp on the anchor! Kewl!
You are quite right ; you wake up, and think " now it's rush hour on the camp
yard tóilet", so you rush out the door ,,,,,,,
Anyway one tiny doubt ; this _is_ a camper, then pulled behind what ?
P.C.
cbetts
> P.C.
I'd get a new, full-sized, streamlined van, rigged with captain's seats for
the whole family, bunks in the back (maybe a solid, soundproof partition
just behind the front seats). Fancy graphics. Then, vary the boat's profile
a bit to match the van's, and paint with complementary graphics - maybe a
mural, spanning both vehicles.
Drive cross country - when you're on the road, parents get the master
bedroom (aft end of the boat) and the kids sleep in the van (with the TV).
Drive to the ramp anywhere along the way. Just have to convert the dinette
to berths when the kids are aboard overnight.
P.C.
"cbetts" <curtisbet...@mediaone.net> skrev i en meddelelse
news:Fxxa8.822$TU4.5...@typhoon.ne.ipsvc.net...
> Drive cross country - when you're on the road, parents get the master
> bedroom (aft end of the boat) and the kids sleep in the van (with the TV).
> Drive to the ramp anywhere along the way. Just have to convert the dinette
> to berths when the kids are aboard overnight.
Anything you like, experience will guide the road ;))
Please, then why not make it so it fit in space, these day's compute graphics
almost _compleatly_ replace reality ;))
Anyway if you want one, you can use 3D-Honeycomb for structure ,I checked my own
North sea Trawler, a 17 meter, and cut it down to 5 meters ; making a solid
vertical ballast, and an even higher floor will provide a dry place anyway,
still even in a lake, you must considder how deep the water shuld be for a
particular boat. Anyway here are a few I checked, they all are exactly 5 meter
long ; Tug for a Camper maby ;))
http://d1o111.dk.telia.net/~u139600113/wrl/trawler1.jpg
http://d1o111.dk.telia.net/~u139600113/wrl/trawler2.jpg
http://d1o111.dk.telia.net/~u139600113/wrl/trawler3.jpg
http://d1o111.dk.telia.net/~u139600113/wrl/trawler4.jpg
http://d1o111.dk.telia.net/~u139600113/wrl/trawler4a.jpg
P.C.
cbetts
I'm not sure how you would build the honeycomb structure. Looks like a lot
of work :-p
Also, any estimate of the speed? Looks like it would go nicely with a six
horsepower. But could it go more than, say 10 kts with ANY amount of power?
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"P.C." <per.c...@privat.dk> wrote in message
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P.C.
"cbetts" <curtisbet...@mediaone.net> skrev i en meddelelse
news:JAMa8.1100$TU4.1...@typhoon.ne.ipsvc.net...
> Nice design software.
>
> I'm not sure how you would build the honeycomb structure. Looks like a lot
> of work :-p
>
> Also, any estimate of the speed? Looks like it would go nicely with a six
> horsepower. But could it go more than, say 10 kts with ANY amount of power?
It's much easyer than you would think ; please consider that this graphic, is
acturly a downscaled hull , so you don't need all these frames.
The main issue with this method is, that you cut each frame in ply or any other
sheet material, and when you have cut all frames, and assembled then with the
simple notches that you cut with the frames, you have this framework, that make
it that much easyer to place the panels.
Also you can be quite sure, that you _will_ get the resutl you want, and the
hull will be strong as a rock. Then please exchouse that I can't point to any
detail about how a 5 meter version will perform. But with the experience
gathered from many years of boat building and boat design, I think that this
will make a very cosy little Trawler ; unable to sink if the mesh are filled
with a mix of foam and emty plastic bottles, and unable to sink when the inside
paneling reach above the water line. ------- Then you could with that small a
boat, make a simple outboard well.
Anyway this drawing been laying ariund for years, so if anyone want so, I could
easyli upload a version with fewer frames and a few calculations about stability
to http://groups.yahoo.com/group/Cyber-Boat-Longboat-5meter/
Here you se another 5 meter, but please check the files section, as there are a
new framework for that particular design in 16 mm ply, ------- still there are
an easy way to make these into 9 mm ply frames.
P.C.
P.C.
"cbetts" <curtisbet...@mediaone.net> skrev i en meddelelse
news:JAMa8.1100$TU4.1...@typhoon.ne.ipsvc.net...
> Nice design software.
>
> I'm not sure how you would build the honeycomb structure. Looks like a lot
> of work :-p
Not compared with the trouble holding big panels in place, while securing with
end-wood nails and fast setting Epoxy. ------ Realy it is _very_ much easyer, to
assemble a stable framework, and nice to know, that when finished, it will be
strong as a rock, not shivering like gel, untill you place a few frames and hope
you don't move center of the forces ,to where they will break the hull open.
------- Also fitting two set of hull panels, make you use thinner panels and
enable you to fill the framework with foam ;
http://d1o111.dk.telia.net/~u139600113/wrl/Trawler-dbl-2.jpg
http://d1o111.dk.telia.net/~u139600113/wrl/Trawler-dbl-3.jpg
Still if you complain this to be very different from the tradisional building
methods, you use in wooden boatbuilding ,you are quite right ;
http://d1o111.dk.telia.net/~u139600113/wrl/ribs.jpg
But with this method, you can make the framework for _any_ hull, still Im'e not
doing that just for _any_ hull, only for the ones I know to be designed with
care or develobed by time.
P.C.
http://groups.yahoo.com/group/Cyber-Boat-Longboat-5meter/