Design for a electric outboard for an inflatable.

[Ari]

Hallo Hansp77..
Maybe you should look at you problem from different angle.. maybe you are using wrong boat..inflatable without engine are no good for this job.. get rid of the inflatable..use something that can be paddle manually..very small size girls in properly design row boat (Jelutong timber dug out canoe..!)can row for hours..in a lake without sweating..

[timplett]

If making your own electric outboard is the way you want to go, look into cordless electric drills. I couldn't tell you how long they would last, but the cheaper drills also have cheaper batteries, and so if you had a few batteries along you could just pop a new one in when one died. Also a lot of them have gear reductions, although perhaps not reduce enough, and speed control would be possible simply by how hard you squeeze the trigger.

[Frosty]

Timplett-- Now theres a point-- you might have some thing there,--Mmm a battery drill??.

But what about a normal electric drill on a long tail, You would need a long wire, How far is your boat out you say? You could even float the wire on little polystyrene floats. You had better make sure the wire was long enough or the plug would come out and you would be stranded. But wait you could save on electric on the way back just pull on the wire.

Hang on a minute you got me thinking now. Extend a halyard from the top of the mast to the shore then simply pull yourself out and back. Taking it from the top of the mast would mean that the boat could swing on its moorings without getting tangled in stuff.

Doctor--- I think I need some more pills.

[timplett]

The halyard would work assuming to other boat traffic, which unless its a private bay or something. is unlikely, and I don't know if pulling yourself hand over hand is much better than rowing. A zip line on the other hand...

[Frosty]

Cant row,-- rubber dinghy --we all know what they are like to row!! Thats why Hansp was asking for advice on miniture sofisticated marine propulsion systems, or ( weed whackers).

Actually he wouldnt need to haul back if he took with him a bungy jump rope attached to shore,. when he was ready to leave just crank in on the cord untill really tight and release!!!! may even break speed records?

[hansp77]

Cordless drill idea sounds interesting (if slightly improbable)-
It would probably need a damn lot of batteries though- 1.6Km there and back.
The beauty and cheek of this idea is that the hardware superstores that sell these powertools (in this country Bunnings) who I have a love/HATE relationship with usually sell these things with one to two year warranties. If you give these tools any decent amount of use, they are garrenteed to die within the warrentte period, thus, you get a perpetually replaced tool.
They do of course say that the warrantee is voided if the tool is used for a professional or trade purposes- but they don't say anything about it being used as a marine outboard longtail!

Other than that I have thought about a human powered prop, but I think it would be too hard to use this on a inflatable.

Ari's suggestion of getting a real boat, which has been sugested before, is probably the best,
I am keeping my eye out for a cheap tender or pram, but as yet, haven't found one.
If I can't decide on a propulsion for the inflatable, and haven't found a real boat to buy (cheap), then I will probably just build one.

Hans,

[alexlebrit]

Hnas I wasn't suggesting you actually pedal your inflatable, I think building in solid structures to enable you to do this would be too hard.

What I was suggesting was using the basic build technique and putting a motor at the top instead of your feet. It gets the motor up in the dry for a start, and the rest of the things used are simple enough to get hold of and not that expensive.

You'd still need a motor though. I'm wondering, how sunny is it there? How long will the boat be sat in the sun? I'm wondering about using a decent 12V battery and your wiper motor,but with one of those solar chargers you can get to keep your car battery topped up. If your boat's going to spend a fair bit of time in the sun, then you could use that as a way to top up your battery too.

[Frosty]

You know after all said and done there is a light appearing at the end of the tunnel. This glimmer is in actuall fact the ubiquotous outboard. This conversation has revealed but one thing, the simplicity and convenience of this simple device.
Even here where I am these little gems of simple propulsion are discarded like sweety wrappers. Its not long since I saw a Honda 2 HP 4 stroke in the bin. I retrived it and it ran but needed a new carb. I saw an aquantance of mine discard his Suzuki 2.5,-- he said it runs ok but the commpression is low and the saddle is loose.
Im sure it must be even easier in Aus to aquire one of these disposable devices.
Getting those 2.5's to work is absalute childs play.

[Ari]

Originally Posted by jack frost

You know after all said and done there is a light appearing at the end of the tunnel. Getting those 2.5's to work is absalute childs play.

2 hp is what he needs ..I had used 2hp on my car topper for fishing in the river..4hp Sea gull..for my wooden sampan, whole engine made of brass or is it copper ?

[m3001]

Hi friends

in macro
http://www.youtube.com/watch?v=aIFFPdzM_Rc

First test
http://www.youtube.com/watch?v=0Fro4zARW_Y

full support
http://www.youtube.com/watch?v=MD2osWr0HNA