300/440/550 unmanned 550 top speed

[Lake Erie Monster]

does anyone have any idea how fast a fairly stock 550 could go if it weren't berdened with the weight of a rider

 

[Conquistador]

I'll need a donor 550, a radar gun, and an open river & I'll get back to you :icon16:

 

[tightithrash]

why does it matter? it will never happen......

 

[special fx]

I've seen it happen..... Unmanned, it porposed very badly and kept top speed down. It finally ran aground and ran out of the water WFO until it seized.

 

[Lake Erie Monster]

looks like ill be adding a trim system to the list.

 

[tightithrash]

well i mean it wont achieve the speed it will travel unmanned with a man on it.

ask fox about his unmanned experience........

 

[butti]

are you making a big rc jetski!?

 

[ColeW]

without a man on it i think it would just skip and not hook at all......................prolly pretty slow

 

[Lake Erie Monster]

i may be buying a 550 and yes i plan to make it rc. first i plan to install all the servos and a reverse/neutral and test my proof of concept. then im going to fashion it to look like some sort of speed boat, probably a cigarette boat.

 

[SkiNaked]

i may be buying a 550 and yes i plan to make it rc. first i plan to install all the servos and a reverse/neutral and test my proof of concept. then im going to fashion it to look like some sort of speed boat, probably a cigarette boat.

How are you going to get a reverse in it? You going to build some kind of gear box?

 

[butti]

build your own hull and use the 550 driveline.scale up a wooden hydro kit and you could build a 100mph 1/4 scale machine!

 

[motoman96]

well jeff jacobs was clocked at 57mph on his race ski, but without a rider it will just porpoise an loose any momentum

 

[Lake Erie Monster]

How are you going to get a reverse in it? You going to build some kind of gear box?

the same principal as my seadoo.

this will just a be a proof of concept, i plan to build something more serious after i gather info off this

 

[OCD Solutions]

It shouldn't be that hard to add enough ballast to keep it hooked up but yet keep it light enough to go fast still. If speed is a desire and no rider will ever be on it then junk the jet and go V-prop, You would have to rethink reverse but it may give you more options in the long run with gear boxes.

You should see if you can find one of these and replace the rope control with a RC Controller.http://www.gizmag.com/go/1736/picture/1940/

 

[njfl]

Ballast is one possibility to aid with the porpoising. Another possibility is to build an adjustable, extended ride plate and play around with the length. I think that is what you were alluding to with the trim system. If you can do it with a ride plate or ballast, I'd opt for that (less servos needed).

Cool idea. Just make sure you stay within range of the controller so it doesn't take off into someone's boat on you.

 

[Lake Erie Monster]

absolute speed isn't a big deal, id just like to see it work

 

[Laserman]

MY JS550 went fast enough when the throttle cable got pinched...

Fast enought to crush the front of the ski against a dock, and smash the handlepole and the hood.

She ran fast and straight. no porposing about it.

She ran like a suicide bomber late for an appointment in hell....

I had the 650 motor and a Westcoast over-sized gas tank, so that changes the weight distribution from stock.

A JS550 would make an incredible RC cigiarette boat!

It could also pull a tube with a cooler!

 

[Lake Erie Monster]

or pull a tube with a kegerator...
the id like the be able to make the trim adjustable from the controler so i could do a little freestyle with it

 

[WRX Dave]

Some servo-controlled trim tabs should keep it level.

 

[Lake Erie Monster]

or pull a tube with a kegerator...
the id like the be able to make the trim adjustable from the controler so i could do a little freestyle with it

serious grammer there..... my bad