how about a combo PWC & motorcycle?

i can't believe someone hasn't refed the SeaLegs

http://www.sealegs.com/

I'd like to see this a the smallest existing RIB format, like an 8 or 9 footer.

Hopefully with detachable road gear.

 

sea legs are only good for parking on the beach and the price is around 80,000 for a dinghy, a bit high i think.

 

$80K and only goes 10mph for 10min? yipes.

I was thinking of one of those high end integrated water jet RIBs with the same motor driving wheels either electrically or via toothed belts, even if that required some down gearing inside sealed hubs.

I've operated fully electric man-lifts and the wheel/hubs seem to have plenty of torque(though quite heavy).

 

thread is still alive and well and i think even this combo idea allready needs a Statement Of Requirements
that electric sinclair trike was only max 30 km on land, you could peddle assist it, diesel allready € 1.40 the litre here but can do too
thing was to low on the road to make it save and as said before it had some regulation issues, showed it as trike sample
but you guy's want to see this amphibian fast, if not very fast i understand, go on land for parking or drive home in/on or what?
i was more thinking of it as dinghy ship shore and to shop/town traffic, it wont exell in eighter mode but would be slow and handy
but for going fast.. you know how "they" drive snowmobiles in the lake at 40 km hr rite? 4 wheel drive jeeps do that too so..
why cant a 2 wheel drive motorbike with wide heavy cupped tires do that trick at say 50/60 km hr as well? that is fast, what do you think
below first very rough and dirty 2 min 4kb slow trike combo sketch with paddle wheels and front rudder

 

Yip, how about two wheeled motorcycle with tires with cups

on either side of the wheel(probably not the tire, so you can use off the shelf tires....custom tires would be a concept-killer IMO).

Maybe add the cups to existing MC wheels. This concept would require a 2WD motorcycle, which only a few have ever been made of any sort (that burly low speed off road of the 1960-70s and I can't think of any others).

This wouldn't be for everyone, needless to say. More of a stunt bike.


For real use I'm leaning toward LIGHTWEIGHT SOT/recumbent OR HEAVYWEIGHT standard(older, smallish...900cc?) PWC with two jets and slightly modified but understood motorcycle suspension as in the pic I posted.


As far as Statement Of Requirements, I'm only interested in 'true amphibs' that can go from land to water, and back again, etc as a unit, without leaving parts behind anywhere.

If the Lightweight can't make it up a steep ramp hauling two big passengers, that would be OK. If it can cruise like a underpowered moped that would be fine.

The Heavyweight should be able to do that no problem with around 900cc and the right gearing. The Heavyweight should be able to cruise like an overloaded large scooter, or maybe like a touring bike with underinflated tires, but should be HWY capable.

Both should be able to 'bump and connect' to the mothership securely for easy boarding, towing and use as backup motor.

 

found this on 2 wheel drive bikes:

some of my SOR thoughts.. yet any SOR does restrict our fantasy allready eh.. but yes lets go “moped” thats exactly the speed boats like so much :-( but feel your rite . maybe a month back i was googling up snowtrackbelts and noticed their profiles varied considerable as i'm interested in amfibies and what may drive them. Years back posted here the idea of having James Bond run a tank on water (those things that shoot in wartimes) made from keflar and carbon, running on water with belts ofcourse. To the point for possibly a new trillseeker toy, think heavy terrain of the shelf tires would do fine but glad to hear you like the paddlewheel too witch dont necesarily has to be slow. “This concept would require a 2WD motorcycle, which only a few have ever been made of any sort" i googled “new trilseeker toy” to see if such a bike doesnt allready exist but got pages of sex, what a world
http://images.machinedesign.com/images/archive/stf1newjpg_00000039089.jpg
Ok, i found a bike http://machinedesign.com/article/all-wheel-drive-bike-1108

and something like this may be able to do the trick allready http://www.motivation-tools.com/adventures/darien_gap.htm this one is also 2 say 4 wheel drive, perhaps place paddlewheels in between? http://www.tuvie.com/wp-content/uploads/dodge-tomahawk3.jpg and when something funny comes out of this -still have to take a better look at your ideas and drawing- lets enter our efforts into http://www.boatdesign.net/forums/bo...oating-design-competition-38639-new-post.html who knows what comes of it ok? What you mean with lichtweight “SOT”? O ya, baby sidewheel amas? Hollow fload wheels etc etc... but rite now the sun is out and so am i, so later more okay?

 

Google "swamp buggies" and "marsh buggies" - have fun!

I think Rokon makes (made?) a 2wd bike.

 

This concept would work in the cold climates:

http://www.youtube.com/watch?v=zBjlSJf4274

Just adapt the design to a pontoon boat, powered by a diesel with closed-loop cooling system. You could also consider it a hybrid propeller/paddlewheel. With enough power, it would work on land without snow, also...

I believe the Russians made similar machines in military style during the cold war.

 

that golden oldie i alway's remembered out of an popular mechanics magazine from.. i wasnt even 10 so say.. 1955?
saw a couch going all directions on mtv recently using the same principle thinking wow again but also friction friction
but rite, what are we doing but having fun
edit: propeller/paddlewheel reminded me of http://www.rexresearch.com/boats/1boat.htm

 

whatdoyaknow, reading this tread back now also see http://www.boatdesign.net/forums/open-discussion/trying-live-egg-39351-5.html#post486160
am sketching a drive on camper flatboat with similar set-up as well

 

I always felt 4x4 pickup, lumber racks and pontoons the rotate down

would be workable, and cheap and simple if done right.

Naturally, the pontoons would include some means of powering a water propulsion of some sort that would be powered by truck's tires.

Might be a little tricky getting the displacement/water-level-at-truck's-running-gear equation right, if for use on otherwise mostly stock truck.

Might need to lift/dip pontoons on entry exit.

Maybe 4x2 would be OK.

 

Take a look at the Porta-Bote. A 14 footer that weighs 96lbs and folds flat. Use it to ferry a bicycle ashore, chain it to some railings, do the shopping and reverse the process. :idea:

http://portabote.com/

Well-----it's an idea. Take a look at the videos.

 

Have you seen the Top Gear UK amphibious car episodes? Jeremy Clarkson created something very similar, the "Toybota." The first one he made flipped over, but the second with fold down pontoons crossed the English channel. Also, the Vietnam road trip special had James, Jeremy, and Richard convert their scooters into PWC in order to get to a bar that was accessible only by water.

 

Peri and MMonkey, that Porta boat was a hull I was considering as amphib starting

point, but as True Amphib(that doesn't leave parts of itself behind on land or sea) similar to SeaLegs, but maybe using mountain bike tires....just because I hear the hull material is very tough and forgiving. Is there any reason you can think of they aren't more popular and why RIB or RIB shaped inflatables are far more popular?

I haven't seen the Toyaboat, but I got the idea from Cuban refugee attempts with 55gal barrels ganged up for pontoons on a truck.

Lets remember we ONLY SEE THE ONES THAT FAILED AND GOT ON THE NEWS(lol). I bet somewhere in a Miami garage there sits a '57 Chevy wagon that made the trip in under 2 hours on plaining pontoons, after a dash through Havana streets to the water at 100mph.

 

When I was a kid I had an old VW bug. I pluged up the heater vents in the car. It was bajaed, front cut off and fenders cut higher with larger tires and a stinger exhaust. I'd drive it down the road, go down the banks, go in the river and float from sand bar to sand bar reving the engine spinning the tires to propell myself through the water. Got stuck trying to get out a few times, but I'd just get out, move the front end over and try again...always made it!