non-marine engine powered boats

"MonkeePuzzle" (monkeypuzzle) 09/19/2017 at 11:46 • Filed to: None

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my father is on a bicycle tour of Vietnam and Cambodia, his engineer’s eye caught some interesting boat power:

“All of these photos are of a style of boat power where a conventional engine, of varying sizes, is mounted on a pivot with a long drive shaft that runs a propeller. Steering is done by pivoting the whole arrangement. The shafts are so long to both reach the water and to balance the engine so that it it relatively easy to handle.”

one in action

A regular car engine- The motor and the shaft (heavy steel) are almost in balance so that one person can move it around.

Some are air cooled and others are water cooled, as is this one and you can see the water pipes on the drive shaft because they have no radiator.

The scoop behind the propeller is how the water is picked up and forced through the motor

A close up of a boat selling us coffee and other goodies

A sequence showing how they steer the boat

A sequence showing how they steer the boat

A sequence showing how they steer the boat

MasterMario - Keeper of the V8s > MonkeePuzzle 09/19/2017 at 12:01

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Another advantage these have is they allow for an extremely shallow draft

Demon-Xanth knows how to operate a street. > MonkeePuzzle 09/19/2017 at 12:01

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I’ve seen those on shows, they’re quite useful with logs and sandbars since you can tilt the propeller around to get in the water rather than having it as a solid point on the back of the boat.

RamblinRover Luxury-Yacht > MonkeePuzzle 09/19/2017 at 12:02

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I take it you haven’t watched The Man with the Golden Gun recently?

TheRealBicycleBuck > MonkeePuzzle 09/19/2017 at 12:03

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Those are called longtails, surface drives, or mud drives here in Louisiana. For those who want a shorter tail, they have a belt-driven version called a gator tail.

MonkeePuzzle > Demon-Xanth knows how to operate a street. 09/19/2017 at 12:06

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yeah, I suspect they are extremely versatile

MonkeePuzzle > MasterMario - Keeper of the V8s 09/19/2017 at 12:08

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yeah, infinitely variable while the prop angle would remain fairly usable still.

If only EssExTee could be so grossly incandescent > MonkeePuzzle 09/19/2017 at 12:38

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They’re just running dirty river water through the engine without filtering out the fishies?

MonkeePuzzle > If only EssExTee could be so grossly incandescent 09/19/2017 at 12:39

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the fish swallow the engine’s heat, and spit it out in the river, then return to the engine to begin the cycle all over again...

vondon302 > MonkeePuzzle 09/19/2017 at 12:42

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The ones in Thailand are pretty damn fast too.

Chariotoflove > MonkeePuzzle 09/19/2017 at 12:43

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The engines are cool. But what I can’t stop thinking is “don’t fall in that water, or you won’t make it out alive (or live long after, anyway).”

If only EssExTee could be so grossly incandescent > MonkeePuzzle 09/19/2017 at 12:47

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Seriously though, look at that water. That silt must cause buildup and blockages in the coolant channels.

MonkeePuzzle > If only EssExTee could be so grossly incandescent 09/19/2017 at 13:13

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suspect the engines are on their 9th life anyway. maybe a weekly teardown and rebuild is just expected

MonkeePuzzle > Chariotoflove 09/19/2017 at 13:24

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[after watching Furlong jumping to the river]

Victor Vacendak: you drink any of that, I’ll be out of a job

Mini Guy- Now has a 4Runner > MonkeePuzzle 09/19/2017 at 13:41

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Im just gonna say it: if you put a hayabusa engine in that, hoooolllleeeee crap

jasmits > MonkeePuzzle 09/19/2017 at 13:49

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So how long till someone does one with an LS?

EngineerWithTools > MonkeePuzzle 09/19/2017 at 14:19

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In their fully-developed, race form...

gmporschenut also a fan of hondas > MonkeePuzzle 09/19/2017 at 21:08

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i imagine they must go through a crazy number of props.

Gerry197 > MonkeePuzzle 09/20/2017 at 14:25

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The water pick-up for cooling is very similar to how fast electric RC boats cool their brushless motors and electronics.