River / House Boat Design Exercise.

wrong one - lets try again - that's better

 

Why use a pointed bow on a Micro ? a Garvey shape is plenty seaworthy, gives more interior volume and avoids the big overhangs forward.

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perhaps a Punt or Sampan hull would also work

 

good one michael pierzga
definately food for thought - I will do drawings for it and see what the resistance value are - I am curious.

By the way,

To all the guys
Would you build a houseboat / weekend cottage like this :-

A - as a mono maybe as per above examples

or

B - as a pontoon boat / catamaran

I prefer a mono - when the question came up my answer was low profile - is less windresistance and low centre of gravity. I am just not crazy about pontoon boats, to me its a flippen raft, with a Winnebago on top of a flat deck.

What does the forum think?

 

If I had it to do over, I'd be all over a landing barge that I could drive a Winnebego on and off.

 

I works just as well
more or less the same resistance values
definately easier to build

but what about the looks - in my country they have never seen any Garvey hulls
I simply dont know - so cant comment on looks.
I can drop the stern further - will do those drawings tomorrow - same stern as the previous drawing - so that you can still put a cover board over the engine for noise reduction

 

Garvey is really easy to develop and will save many hours of work.

 

I like the Garvey shape.

The secret will be to accurately determine how much the finished Micro houseboat... with its water tank, BBQ, Batteries, Coolers full of beer, will weigh. Then get the hull volume and weight distribution correct .

They have been building Sampan houseboats for a few thousand years. Might be worthwhile to do some googling and investigate the Sampan shape. Its more elegant than a Garvey and better suited to low power because you need not worry about overloading with Beer and immersing the transom. . Sometimes they are referred to as Punts.

Try Sampan Houseboat or Kerala Lakes Houseboat or Punt Houseboat with google images.

 

Maine, why are you using so much rocker?

 

My idea is to get the stern clear of the water
unfortunately with a Garvey - the bow is also clear
so I end up with a lot of rocker to get the displacement of 3000 kgs.

of course with a submerged bow that cuts thru the water the rocker is considerably less

power boats that I have observed with the "tail dragging" are almost "squatting" with the stern submerged, even at very low speeds.
So the main criteria is - fuel efficiency at 6 knots.

 

I have never been on a Garvey - so I am moving into something here that worries me and so would always gravitate to something that I know reasonably well and that is mono sailboat hulls.

I could flatten the Garvey hull and see then.

 

Oh well this has been interesting.
This garvey hull has now been tweaked a bit more and looking like it could play the part.

Still around 3000kgs displacment and still around 2kw @ 6knots with a draft of 350mm. 6.5m overall and beam of 2.6m.
hull side panels can be cut from standard sheets that are 4' (1.2m) wide
so reasonable cutting with reasonable waste
I got the rocker a bit flatter but the general ideas are still there.

The garvey hull should get serious consideration for this kind of vessel.

Now the bad news for South Africans
R 20k for marine-ply
R 20k for epoxy and glass
R 20k for a Parson 25hp fourstroke
R 40k for all the rest, batteries solarpanels and and and - NO TRAILER INCLUDED
So for a R 100k you have got a "River boat"
Working from home and GOING FOR IT over weekends and evenings anywhere between a year OR TWO.

So for all the other folks we are looking here in South Africa at around US$ 11 000

Admittedly it is a lot of money, but when you see what the costs are of weekend cottages and the upkeep thereof - this is cheap.
Even camping today with a caravan is crazy expensive.

Enjoy - this was fun - nice bit of distraction from the daily bump and grind.

 

Boat around 1700 kgs (my micro 5m x 2.3m is 450kgs empty)
Payload approx 1300 kgs
so 3000 kgs is within the parameters that what we have in the harbor.

 

Well you may think that my Riverboat is fugly

check this one out

http://www.youtube.com/watch?v=iujG1ad1hYA

the captain cant see where he's goin - and when he's goin he aint gonna stop

 

I would say that placing the cabin in the middle would reduce useable cockpit size. In this configuration your boat would have two small "outdoors" areas -- one aft and one fore. If I would try to maximize my efforts and useable area I would have only one area for the cockpit, either aft or fore. The minimum size would be just about enough to stretch full height under the sun on a bench, i.e. about 6'6" or a bit bigger.

 

Hi kvsgkvng
the main attraction in this case is specifically the forward deck where you can put two deck chairs and watch the scenery go by.
the aft deck is basically just a space to stand when docking and getting on and off the boat

the most important feature is the front deck, so that you can get away from the engine sounds - even a fourstroke at 2000 rpm under a solid cover is noisy. With a boat like this at 6 knots you wont hear the engine at all up front.

HOWEVER I know that every fisherman out there would want as little front deck as possible and maximum aft deck.

The basic change that I made with this design is to lengthen the cabin by 0.6m and shorten the boat (front deck 2m) - to a total of 6.5m