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Old Koreelah

Ground effect craft in Darwin

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Posted (edited)

His rig raises more questions than it answers. What happens when it breaks down on a huge tidal mudflat, inhabited by 4M crocs? What's to stop a 4M croc climbing aboard, when he's broken down? (they snatch people out of tinnies on the water).

How does he get rescued? The only safe way is a chopper. But does Darwin have any dedicated chopper rescue service? Careflight, maybe? A breakdown could turn into a pretty expensive outing.

 

I'm surprised the NT has no recreational boating registration - nor it appears, any form of licensing for watercraft use. Talk about a casual approach. Looks like a good place to become Crime Central, for knocking off boats.

I can recall, many years ago (must have been about '92 or '93, I had reason to get a Kenworth fibreglass truck bonnet repaired. I went to a local (Cannington, W.A.) boatbuilder, who specialised in fibreglass repairs as well as boat building.

He was a good operator, and when in his office, I noticed a huge pile of boat photos on his office wall. I said, "I guess these are all your repair or construction jobs, are they?".

He replied, "No, they're all photos of stolen boats that the Police send me, to keep an eye open for!". All these boats were registered, too.

Most were stolen from the East Coast, and quite a few were finally found in W.A. Some of them were big boats, too.

Edited by onetrack

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Posted (edited)

I'd rate it as a hovercraft, because it appears to run on a cushion of air - but I wouldn't rate it a "ground-effect craft", which to me, is a craft that actually leaves the ground and flies - even though it's only using ground effect for lift, not aeronautical lift.

 

EDIT - Hang on, I'm confused now - I just watched the video above, and that rig he's got in the video, is a ground-effect craft. But - I watched some of his earlier videos, and he had a completely different rig, a hovercraft, in them?

 

https://www.hovercrafter.com/index.php/topendhover/1456-the-first-test-run

 

 

Edited by onetrack

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3 hours ago, onetrack said:

...He replied, "No, they're all photos of stolen boats that the Police send me, to keep an eye open for!". All these boats were registered, too.

Most were stolen from the East Coast, and quite a few were finally found in W.A. Some of them were big boats, too.

Anyone wanting a cheap boat should go to this place: it's like Pittwater, but many, maybe most of these yachts are abandoned. Some have sank and most are covered in bird crap, etc. 

 

When people lost their jobs and relocated, many thought it was cheaper to leave the boat behind. I know one bloke who spend more than it's market value shipping his (via barge, truck, etc.) to Tassie.

 

 

image.jpeg

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Brother just got a 23 foot yacht in usable condition just needs a bottom clean. 

 

In harbour but will move to pittwater. 

 

Grand cost including 5 HP outboard and tender......

 

$100.

 

Boats can be incredibly cheap if you shop well. 

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My little boats are NOT boat-coded.

Who believes drilling a couple of holes, to fasten an aluminum ID plate with PULL rivets,. is a good idea, in a salt environment !.

LAW states I can't sell without "boat-code" but, I know I CAN give it away !

Up your's Bureaucrats.

spacesailor 

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With the skirt its a 'hovercraft'; with a wing only (no skirt or engine pushing air down) it would be a vessel that is know as a 'WIG'  (wing in ground effect vessel) (They had them operating out of Cairns in the late 90's.  They stalled at about 50 kts.  A mate who was a a test master told me about when one he was trialling stalled and the belly flop shook him up a bit.)  They were 8 and 14 pax sizes and target was PRT type seating numbers with a 4 hour trip Brisbane to Mackay and capable of operating in 3 meter seas and to compete with airline services.  Never succeeded.

 

This guys latest design evolution is a hybrid hovercraft / WIG.  

 

I'll leave the name to the designer / regulators so a novel craft at this stage.

 

Cheers

 

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Ekranoplane was another name for them. The hovercraft has a skirt and relies on high air pressure within the confines of the skirt to lift the body of the vessel. they used them years ago in England for cross channel ferries. I don't know what the fuel consumption was, but the noise was horrendous. A friend of mine worked on the Cairns vessels and I believe he has the design rights, but nothing ever came from them.

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6 hours ago, Yenn said:

Ekranoplane was another name for them. The hovercraft has a skirt and relies on high air pressure within the confines of the skirt to lift the body of the vessel. they used them years ago in England for cross channel ferries. I don't know what the fuel consumption was, but the noise was horrendous. A friend of mine worked on the Cairns vessels and I believe he has the design rights, but nothing ever came from them.

Yenn, it's without the 'e'. Ekranoplan is the Russian term for ground effect vehicle. If you get on Google Earth or Google maps satellite view and go to Kaspiysk in the Caspian Sea, zoom in on the harbour and you can see it there in dry dock.

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Posted (edited)
Quote

they used them years ago in England for cross channel ferries

Not quite right. They were (and still are) used to cross the Solent between Portsmouth and the Isle of Wight. They've been in operation since 1965. These hovercraft are 78 seaters.

 

https://www.hovertravel.co.uk/about-hovertravel.php

 

 

 

Edited by onetrack

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Posted (edited)
10 hours ago, onetrack said:

Not quite right. They were (and still are) used to cross the Solent between Portsmouth and the Isle of Wight. They've been in operation since 1965. These hovercraft are 78 seaters.

 

https://www.hovertravel.co.uk/about-hovertravel.php

 

 

 

Actually, Yenn is quite right. I travelled on them between Dover and Calais dozens of times. They operated that route for thirty years -

 

Hovercraft end 30 years of cross-channel journeys - Telegraph

Edited by Head in the clouds
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I knew I was correct. I saw and heard them. Back in the good old days I used to go to Ryde in the Isle of Wight on a steam paddle steamer. The engine room looked wonderful to a young bloke like me, much nicer than the other ferry which went to Cowes, it was a screw driven ship, not sure if it was coal or oil fired.

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Thanks for the correction, men. My apologies, Yenn. I didn't know about the Cross-Channel hovercraft, I only knew about the ones across the Solent. You learn something new every day.

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I noticed that just before start-up they rotated to aim forward.

Perhaps scooping air into the skirts while at speed to reduce fan costs?

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On 4/12/2019 at 6:46 PM, onetrack said:

Thanks for the correction, men. My apologies, Yenn. I didn't know about the Cross-Channel hovercraft, I only knew about the ones across the Solent. You learn something new every day.

These were the cross-channel hovercraft, vastly larger than the ones that cross the Solent - the SRN4, the largest hovercraft ever built

 

Even so, it was a rough and uncomfortable ride when the seas were anything over about 3m.

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