Cranes

GJ0KYZ · 27 November 2010, 13:24

Does anyone have any experience with cranes aboard ribs? I'm thinking of larger craft fitted with small knuckle cranes like those made by Maxilift. I was wondering how these affected handling when underway and when loading equipment aboard.

martini · 27 November 2010, 13:34

What sort of weight/reach are you thinking? I'm trying to guess what you're plotting to do here but nothing springs to mind!

Big rib down to the estuaries then crane the jetski in for the shallow bit?!

GJ0KYZ · 27 November 2010, 16:28

Quote:

Originally Posted by martini

What sort of weight/reach are you thinking? I'm trying to guess what you're plotting to do here but nothing springs to mind!

Big rib down to the estuaries then crane the jetski in for the shallow bit?!

That's it in a nutshell. Jetskiing to France, even when supported by a rib, would be something you'd do only on the calmest of days but if I got a bigger boat (e.g., a Ribcraft 10.5 or 12m) with a crane and a cradle then the ski could go in the boat and I could unload it in Granville and then Bob's your uncle - more power and more glory.

A friend of mine came around this afternoon to deliver some firewood and his truck had a Maxilift crane that could lift over a tonne but which was really small and only weighed 350kg itself. Posh jet skis weigh about 480kg so obviously you'd need a big rib. Santa, are you reading this??

gotchiguy · 27 November 2010, 16:36

Quote:

Originally Posted by GJ0KYZ

That's it in a nutshell. Jetskiing to France, even when supported by a rib, would be something you'd do only on the calmest of days but if I got a bigger boat (e.g., a Ribcraft 10.5 or 12m) with a crane and a cradle then the ski could go in the boat and I could unload it in Granville and then Bob's your uncle - more power and more glory.

A friend of mine came around this afternoon to deliver some firewood and his truck had a Maxilift crane that could lift over a tonne but which was really small and only weighed 350kg itself. Posh jet skis weigh about 480kg so obviously you'd need a big rib. Santa, are you reading this??

No need, just get one of these (or an adaptation on the idea).

Essentially a large rib with an inboard but instead of a swim platform it has a cradle for a jetski

You could even fit it with jet propulsion so you could already get extremely close and then just reverse the jetski off the back

I remember reading the article in rib int a few months back

http://www.ribmagazine.com/site/inde...=997&Itemid=84

Erin · 27 November 2010, 16:39

Didn't Richard Whatshisname have a crane on board his Aluminium rib/boat/thing with the 4 outboards to load and unload his quads and motorbikes when he took them from Jersey to France. Perhaps he'd be able to offer some advice.

GJ0KYZ · 27 November 2010, 16:59

Quote:

Originally Posted by Erin

Didn't Richard Whatshisname have a crane on board his Aluminium rib/boat/thing with the 4 outboards to load and unload his quads and motorbikes when he took them from Jersey to France. Perhaps he'd be able to offer some advice.

Yes he did; where is he now by the way? I haven't seen his boat for ages. The idea would be that the jet ski cradle would bolt to the deck and so be removable allowing me to crane a motorbike onboard when need be. All this will be taking place after I win the Christmas lottery of course. Incidently, has anyone ventured out today? It's blo*dy freezing. My poor sponsons will have shrivelled up in this weather.

martini · 27 November 2010, 19:44

I've had similar thoughts but with taking my Zodiac on the big boat for inshore exploration. But rather than using a crane I was going along the lines of a ramp at the back. Got the idea from seawork where I took out the zodiac hurricane Mach II European demo boat. Just had a pair of runners that went over the engine box down to the swim platform with a winch to pull the sib up. Great idea, would work well for your application but needs to be an inboard powered mothership obviously.

gotchiguy · 27 November 2010, 20:01

Quote:

Originally Posted by martini

I've had similar thoughts but with taking my Zodiac on the big boat for inshore exploration. But rather than using a crane I was going along the lines of a ramp at the back. Got the idea from seawork where I took out the zodiac hurricane Mach II European demo boat. Just had a pair of runners that went over the engine box down to the swim platform with a winch to pull the sib up. Great idea, would work well for your application but needs to be an inboard powered mothership obviously.

Ok fine, just ignore me

Quote:

Originally Posted by gotchiguy

Essentially a large rib with an inboard but instead of a swim platform it has a cradle for a jetski

You could even fit it with jet propulsion so you could already get extremely close and then just reverse the jetski off the back

I remember reading the article in rib int a few months back

http://www.ribmagazine.com/site/inde...=997&Itemid=84

martini · 27 November 2010, 20:11

Quote:

Originally Posted by gotchiguy

Ok fine, just ignore me

Sorry I'm out using the iPhone, link was taking forever so I gave up!

Erin · 27 November 2010, 20:13

I remember now - it was Gilpin. Link to pdf attached. No sign of a crane though but haven't read it all.

http://www.marinekits.com/downloads....n=press&id=156

gotchiguy · 27 November 2010, 20:36

Quote:

Originally Posted by martini

Sorry I'm out using the iPhone, link was taking forever so I gave up!

Well I'm in detention using the iPhone

willk · 27 November 2010, 20:48

Quote:

Originally Posted by gotchiguy

Well I'm in detention using the iPhone

Richly deserved, no doubt, whatever about the phone...

gotchiguy · 27 November 2010, 20:55

Quote:

Originally Posted by willk

Richly deserved, no doubt, whatever about the phone...

A hand-me-down.

I do not need, nor want a phone of such standard for myself, but, thanks to two parents with regular business upgrades, I do not complain when the old ones are passed down.

I may be very privileged, but I'm not spoilt.

GJ0KYZ · 27 November 2010, 21:17

The Zodiac launching platform is an interesting idea and would appear ideal for sibs. However, I don't think it would work with a PWC that weighs 500kg. You might just be able to winch it aboard but you'd never get it back in again. At least with a crane you could get a bike or a quad on the boat if need be. Out of interest, does anyone know how much those Zodiac Mach IIs cost, or how much a Ribcraft 12m costs for that matter?

gotchiguy · 27 November 2010, 21:23

Quote:

Originally Posted by GJ0KYZ

The Zodiac launching platform is an interesting idea and would appear ideal for sibs. However, I don't think it would work with a PWC that weighs 500kg. You might just be able to winch it aboard but you'd never get it back in again. At least with a crane you could get a bike or a quad on the boat if need be. Out of interest, does anyone know how much those Zodiac Mach IIs cost, or how much a Ribcraft 12m costs for that matter?

Zodiac Hurricane Mach II - at least $250,000 I would have thought

Ribcraft 12m - at least £100,000 bearing in mind the prices of Redbays of the same size

willk · 27 November 2010, 21:31

Quote:

Originally Posted by gotchiguy

Ribcraft 12m - at least £100,000 bearing in mind the prices of Redbays of the same size

...which run from £150k-£200k

Quality - it's hard to put a Value on it

martini · 27 November 2010, 21:33

Quote:

Originally Posted by gotchiguy

Zodiac Hurricane Mach II - at least $250,000 I would have thought

And the rest. The european demo as shown in your link was half a million pound

gotchiguy · 27 November 2010, 21:46

I was only trying to help make it sound a little more attainable

spartacus · 28 November 2010, 09:25

Here's details of Rayglass's Protector RIB (jetski propulsion).
http://www.rayglass.co.nz/admin/docu...csheet2010.pdf

gotchiguy · 28 November 2010, 09:39

Quote:

Originally Posted by spartacus

Here's details of Rayglass's Protector RIB (jetski propulsion).
http://www.rayglass.co.nz/admin/docu...csheet2010.pdf

Waaaaaay too practical.

Incidentally, you remember our little disagreement over the little flap at the nose of the pro? Well there's a new hypalon 470 at our boat yard that has had the flap ripped off. The tubes are under so much tension with the air inside that the bottom of the tube is a good 3 inches above the fibreglass. Obviously the boat cannot go out as it is, but with just the main body of the flap (sans strap) I reckon it would be fine. I'll get a pic when were next out there