Slashdot Mirror


What Happened To Passenger Hovercraft? (bbc.com)

An anonymous reader writes: Although much has been written about hoverboards lately, hovercraft have largely faded from public imagination, BBC News reports. The Bond-esque 1960s sensation proved too noisy to roam inland rivers regularly, while too small to compete at sea with a new generation of conventional mega-ferries and high-speed car-carrying catamarans. Military aside, only a 10-minute English route and a Sino-Russian river border crossing keep hopes air-cushioned nowadays, while civilian operators wait for electric propulsion to become practical, aiming to reduce airplane-like noise levels and excessive fuel costs with new technology.

69 comments

  1. Missing Option: Everglades. by Ann+O'Nymous-Coward · · Score: 1

    I'm a Florida tourist, you insensitive clod!

    1. Re:Missing Option: Everglades. by Penguinisto · · Score: 1

      Err, those are typically not hovercraft, but airboats, which work a wee bit differently.

      (...though I can see the appeal of a hovercraft in mega-swampy areas like the Everglades...)

      --
      Quo usque tandem abutere, Nimbus, patientia nostra?
    2. Re:Missing Option: Everglades. by swb · · Score: 4, Interesting

      Airboats are still incredibly noisy.

      I rode on one in Louisiana and IIRC it was basically a flat bottomed aluminum boat with a Chevy 454 V8 bolted to a stand in the boat with an actual airplane propeller attached. We all wore shooting muffs.

      It was a pretty fun ride, though. On wide expanses of water, I'd swear it didn't turn per se, but sort of turned sideways until you'd built up enough thrust in the new direction to stop going the old direction. And it worked in water so shallow I couldn't believe it was floating by any definition. We sort of stopped in one shallow spot and I asked the guy "What happens if it gets stuck?" And he said "Well, we have to get out and push" which was fine, other than the 6 alligators I could count within about a 30 foot radius of the boat.

      The whole experience had a touch of "Southern Comfort" (IMDB it) to it. We called a tourist place looking for a ride and the operator said it was out of season for him, but he said something like "Call Pierre Thibideaux, he'll probably take you out" and sure enough we drove to some remote spot on the bayou and this guy with a French accent was waiting with an airboat. Great guy, but of course having seen "Southern Comfort" I was a little worried where we might end up.

    3. Re:Missing Option: Everglades. by Anonymous Coward · · Score: 1

      Hey, that reminds me of "Southern Comfort"... have you seen it?

    4. Re:Missing Option: Everglades. by PopeRatzo · · Score: 1

      I'm a Florida tourist, you insensitive clod!

      Thank god. I was hoping someone would mention Florida so I could post this:

      http://www.rawstory.com/2015/1...

      --
      You are welcome on my lawn.
    5. Re:Missing Option: Everglades. by shadowrat · · Score: 1

      i guess part of the problem with hovercraft is they are kind of fragile. the everglades is loaded with stumps hidden among the sawgrass that will tear the hovercraft's skirt open, then pffft your air cushion is leaking out and you are sinking.

    6. Re:Missing Option: Everglades. by Anonymous Coward · · Score: 0

      And then you find that stump has teeth, and is mighty pissed you just ran it over...

    7. Re:Missing Option: Everglades. by oobayly · · Score: 1

      Our office did hovercrafting for our Christmas outing/dinner - these kind of single seater hovercrafts. They were far more physically demanding than any of us imagined. Like you say, when you turned them, the just kept going the same direction, but at right angles to the direction of travel. The trick was to lean into the turn and use the friction of the skirt to change the direction of travel. You basically knelt in the them and used your weight to steer.

  2. I blame SeaSpray. by xxxJonBoyxxx · · Score: 1

    I blame SeaSpray.

  3. Used to be fairly common... by Anonymous Coward · · Score: 0

    Around the early 1990s, I test drove a hovercraft that was selling for about $10k. With the salesperson, I got it easily up to 70mph (what the caliberated radar gun clocked it on, when running down a closed road), and because it used foam in fiberglass for the main body work, when the engine was off... it floated, and was usable for fishing.

    It was a fun, though loud ride. With modern batteries and electric motors, I'd expect the only noise to be the fan, so a modern version would be a lot quieter.

    Seems like anything transportation related that isn't a Prius add-on or bicycle accessory gets tossed out to pasture these days. My neighbor has a mid-1960s convertible with doors that have tight seals... and it can drive right into the lake without a second thought. It is almost 45 years later... flying cars won't happen... but a floating car would be nice.

  4. Love riding hovercraft by Anonymous Coward · · Score: 1

    I have fond memories as a teenager riding the hovercraft from Southampton to the Isle of Wight and back for summer holiday fun. Fun, fun, fun. If one was stood aft upon take off, the spray generated by the fans was enormous and you received a good soaking, which was pleasant on a warm summer day. It would douse your fags, though...

    1. Re:Love riding hovercraft by Anonymous Coward · · Score: 0

      ... the spray generated by the fans was enormous and you received a good soaking, which was pleasant on a warm summer day. It would douse your fags, though...

      Yeah, well they were probably flaming anyway.

    2. Re: Love riding hovercraft by Anonymous Coward · · Score: 0

      There are still operate daily https://youtu.be/TIA0IsPzLrI

    3. Re:Love riding hovercraft by Anonymous Coward · · Score: 0

      Safest form of flying.

  5. Full of eels by spaceyhackerlady · · Score: 5, Funny

    Never a good start...

    1. Re:Full of eels by Anonymous Coward · · Score: 0

      I came for this comment.

    2. Re:Full of eels by WarrenBurstein9091 · · Score: 1

      I've lost my English-Hungarian phrasebook, so are the eels piloting the hovercraft, are they passengers, or cargo?

  6. the other boats got better by turkeydance · · Score: 1

    and relatively cheaper per transported cargo.

    1. Re:the other boats got better by ColdWetDog · · Score: 1

      About a decade ago, a local boat builder / operator bought a 60 foot commercial hovercraft to make 80 - 90 mile runs between various small towns. It was hoped it would be less expensive and much faster than the Alaska State Ferries. Was basically a flop. The thing kept breaking down - and this was with a group of people that were capable of building 100 foot aluminum boats. It was noisy. The ride was rough. It was expensive and basically had no cargo capacity.

      Plain ol boats won out....

      --
      Faster! Faster! Faster would be better!
    2. Re:the other boats got better by Panoptes · · Score: 2

      Perhaps the main reason the hovercraft never took off is a more prosaic one - limited ability to operate in bad weather and rough seas. I have happy memories of sitting in an ever-lengthening queue in an English Channel ferry port for the best part of a day because of high winds and wave heights.

    3. Re:the other boats got better by Errol+backfiring · · Score: 1

      And faster. A hovercraft used to be one of the fastest means of transport over water. The hovercraft I know (the one across the channel) is effectively replaced by a large catamaran. This catamaran is much faster than the regular ferry and can transport more cargo than the hovercraft.

      --
      Nae king! Nae laird! Nae yurrupiean pressedent! We willna be fooled again!
    4. Re:the other boats got better by trigpoint · · Score: 1

      That was a while ago, The cross channel catamarans have long gone too, replaced by a train. I believe catamarans still operate on the Irish Sea though.

    5. Re:the other boats got better by tehcyder · · Score: 2

      The cross channel catamarans have long gone too, replaced by a train.

      What they make floating trains now? Where does the track go? Huh?

      --
      To have a right to do a thing is not at all the same as to be right in doing it
    6. Re:the other boats got better by nukenerd · · Score: 1

      The cross channel catamarans have long gone too, replaced by a train.

      What they make floating trains now? Where does the track go? Huh?

      In a tunnel.

  7. That's silly. by Type44Q · · Score: 5, Interesting

    What happened to passenger hovercraft? That's obvious; the flexibility they provide (amphibious, require little infrastructure) obviously doesn't offset their inherent disadvantages (lack of carrying capacity, poor fuel efficiency, etc) except for military applications. What I want to know is what happened to the hydrofoil? I got to ride on one from H.K. to Macao at a very young age; I remember being mildly disturbed at the speeds we were traveling at... I've never heard a peep about them, however.

    1. Re:That's silly. by Type44Q · · Score: 1

      Deciding to answer my own question, I came up with this; who'd have figured?!

    2. Re:That's silly. by Thud457 · · Score: 1

      hydrofoils?!
      pish posh.
      whatever happened to wing-in-ground effect craft? They could be quite large with a correspondingly large cargo capacity.

      --

      the preceding comment is my own and in no way reflects the opinion of the Joint Chiefs of Staff

    3. Re:That's silly. by Type44Q · · Score: 1

      whatever happened to wing-in-ground effect craft?

      I seem to recall Hubertus Bigend resurrecting one... ;)

    4. Re:That's silly. by hawguy · · Score: 3, Interesting

      What happened to passenger hovercraft? That's obvious; the flexibility they provide (amphibious, require little infrastructure) obviously doesn't offset their inherent disadvantages (lack of carrying capacity, poor fuel efficiency, etc) except for military applications. What I want to know is what happened to the hydrofoil? I got to ride on one from H.K. to Macao at a very young age; I remember being mildly disturbed at the speeds we were traveling at... I've never heard a peep about them, however.

      Turns out they have their own disadvantages. Seasickness and reliability were a big problem with the last attempt to provide hydrofoil service in Hawaii... though it's been over 30 years since then, so maybe they are better now. Even fast catamarans couldn't succeed in Hawaii, though I think their problems were more political than technical.

      http://beatofhawaii.com/hawaii...

    5. Re:That's silly. by Casper0082 · · Score: 1

      They still exist and I rode one a couple of years ago. It feels just like being on a plane.
      https://www.turbojet.com.hk/en...

    6. Re:That's silly. by myrdos2 · · Score: 1

      Also cool are the planes that flew a few feet above the water to take advantage of the ground effect. Caspian Sea Monster

      I understand they were discontinued because standard jet planes encounter less air resistance at 30,000 feet and actually end up using less fuel.

    7. Re:That's silly. by Dereck1701 · · Score: 2

      Hydrofoils never caught on because with the technology of the day unless you were traveling stupid proof route, in fairly nice weather with a pretty decent depth they were extremely dangerous. Hit a sand bar or a whale or some other fairly solid object and your ship takes a nose dive at 50 knots. That could (perhaps should) change today with GPS, sonar, radar & computer systems which could nowadays decrease the chances of such incidents or at least blunt their impact but there are still cost/maintenance issues involved with them. More widespread usage could eventually solve these issues (economies of scale & greater production competition) but it'll probably take time especially in as conservative of an environment as maritime travel.

    8. Re:That's silly. by Anonymous Coward · · Score: 0

      I took a hydrofoil between Bratislava and Vienna about a year ago.
      Also, check out Ekranoplan - http://wiki.vostokwatches.eu/ekranoplan.html

    9. Re:That's silly. by Anonymous Coward · · Score: 0

      Hydrofoils are pretty expensive to maintain and build compared to conventional seacraft. They also tend to chop up sea life with submerged, high speed blades plowing through the water.

      Fast is also a problem. They're often /too/ fast and present a danger in heavily trafficked waterways, which limits their use.

      It's a tough niche to exist in. In many cases it's not much more expensive to fly, and flying heck of a lot faster.

    10. Re:That's silly. by pz · · Score: 1

      There is regularly scheduled hydrofoil service between Athens and a handful of Greek islands. The ride is fast, but a little noisy. The boats are disturbingly powerful for their size. Being on one of them is the only time I've felt jerk (the time derivative of acceleration) in anything larger than a small motorboat. They are also very sensitive to water conditions ---you don't want to ride in them when it isn't nice and calm.

      info -- http://www.aegeanflyingdolphin...

      video of a Flying Dolphin approaching port -- https://www.youtube.com/watch?...

      --

      Put my fist through my alarm clock with its ding-dong death inside my ear. - The Blackjacks.
    11. Re:That's silly. by Anonymous Coward · · Score: 0

      I seem to remember for one particular hydrofoil implementation (this was actual commercial service somewhere on the East Coat), they had problems with cracks developing in the foils themselves.

      This makes sense when you think about it. The foils take the weight of the entire hydrofoil. They are small because the whole point of a hydrofoil is to reduce the contact with the water. At speed the only part of the boat touching the water is perhaps 4 hydrofoils and a propeller. There is a huge amount of force being applied to those foils, and for a passenger ferry hydrofoil capable of carrying cars the loading on each foil can easily be tens (hundreds?) of tons.

      Of course you can change the engineering and address the problem. The thing is though, build volumes are so low that these are basically one-off custom orders, every time. Every customer is the lead tester and prototype sponsor for their hydrofoil.

    12. Re:That's silly. by aaarrrgggh · · Score: 1

      I did HK-Macau one way on hovercraft and one way on hydrofoil. Victoria Harbor is one place where arguably the hovercraft is a better solution, given the amount of submerged and semi-submerged debris in the water. I believe there was an accident recently when a hydrofoil hit something, forget if there were casualties or not.

      Hydrofoils have come a long way though; look at what they do with sailboats now!

    13. Re:That's silly. by Anonymous Coward · · Score: 0

      That wasn't the problem I heard of. The trouble with ground effect aircraft is waves. The waves mess with the separation between the plane and the water; unless you have fairly calm water you cannot depend upon the air cushion that is the big benefit of the ground effect.

      The options are to fly higher and lose most of the ground effect. Or stay low and, I imagine, endure a pretty rough ride with waves and spray actually touching the plane.

      The really frightening possibility is rogue waves. Since waves can reinforce each other's amplitude, a rogue wave can potentially down a ground effect aircraft.

    14. Re:That's silly. by Solandri · · Score: 2

      What happened to passenger hovercraft? That's obvious; the flexibility they provide (amphibious, require little infrastructure) obviously doesn't offset their inherent disadvantages (lack of carrying capacity, poor fuel efficiency, etc) except for military applications.

      As this is /., I'll get into some of the technical details. The resistance a hovercraft encounters is basically energy transferred to the water and dissipated as waves. The slower the hovercraft is moving, the greater this wave resistance. It's greatest when the hovercraft is stationary - in that mode the air cushion is displacing a volume of water equivalent to the vehicle weight, just like a displacement hull ship. As it speeds up, this wave resistance decreases. Basically each "block" of water experiences the weight of the air cushion for less time the faster the hovercraft is moving. So the faster the hovercraft is moving, the less time there is for each "block" of water to start accelerating downwards, the less it moves, and the less wave resistance there is. At extremely high speeds, there's practically no wave resistance - just like a planing hull except without the friction between the hull and water.

      As it turns out, for most commercial ship sizes and speed regimes, the hovercraft doesn't have much if any advantage over a fast catamaran or even a planing hull. But because it's basically an aircraft (and generates thrust via the air), it's a lot more expensive to operate. At extremely high speeds (50-100 knots) the hovercraft is more efficient (albeit still using more energy than traveling at slower speeds). But it's pretty much only the military who really wants ships which can go that fast. (At even higher speeds you're better off with a WIG - wing in ground effect vehicles - which are even more like an airplane.)

      What I want to know is what happened to the hydrofoil? I got to ride on one from H.K. to Macao at a very young age; I remember being mildly disturbed at the speeds we were traveling at... I've never heard a peep about them, however.

      Cost of construction, maintenance, and operation. Like with the hovercraft, it's basically an aircraft. The one you rode from HK to Macau was probably a Kawasaki jetfoil. It was originally designed by Boeing, and licensed to Kawasaki when they couldn't sell any in the U.S. In terms of construction, it's basically an airplane in the shape of a ship (lightweight aluminum construction).

      A displacement hull and even most catamarans are dirt simple to build and maintain and don't really care how much weight you load onto them (less true for catamarans). Hydrofoils, like hovercraft and aircraft, are extremely weight-sensitive. That pretty much limits them to carrying passengers. And the higher construction and maintenance costs means their ticket prices are only sustainable on extremely lucrative routes, like people traveling from Hong Kong to Macau to gamble.

      There's just not much of a market space between a 30 knot conventional ferry and a 200 knot turboprop aircraft. If you want cheap, the ferry is considerably cheaper. If you're willing to pay more, the turboprop will almost always get you there a lot quicker for just a little more cost.

    15. Re:That's silly. by Knuckles · · Score: 1
      --
      "When I first heard Daydream Nation it quite frankly scared the living shit out of me." -- Matthew Stearns
    16. Re:That's silly. by Anonymous Coward · · Score: 0

      What I want to know is what happened to the hydrofoil?

      They're still around. I went to Russia this Summer and took one from St. Petersburg to Peterhof. But even Wikipedia has some of the disadvantages of hydrofoils, so I guess they mostly go the same way of the hovercraft.

  8. Tom Scott explains by Anonymous Coward · · Score: 4, Informative

    Great video describing the downturn of the hovercraft and concorde etc - https://www.youtube.com/watch?v=eYH1lPm41-0

  9. Did it, once. by pubwvj · · Score: 4, Informative

    I rode on a hovercraft once - over the English channel from France to England. It was an interesting experience. Not worth repeating. It was extremely noisy. I would rather take a slower route.

    1. Re:Did it, once. by Anonymous Coward · · Score: 2, Interesting

      I did too - I loved it. And we took our car too. An hour after disembarking, the car stopped and wouldn't restart ... and then it did. And then it stopped. And started again.

      Then later in the day, it recovered and all was well for the rest of the holiday. We figured the fuel tank had been shaken and stirred, and all the crap in there had decided to take a holiday down the fuel pipe to visit the engine...

    2. Re:Did it, once. by grahamsz · · Score: 1

      I thought it was great and would love to do it again. Certainly a lot bumpier than the turbo jet that runs between Hong Kong and Macau - that just felt like a really fast ferry.

  10. it was price versus use by Anonymous Coward · · Score: 0

    My stepdad used to work for a company called Hoverstar USA down in Florida.

    The hovercrafts then used fiberglass bodies and 440cc yamaha smowmobile engines. Fun things to tool around in.

    We used to take them out into the Jensen Beach causeway (I was around 11 at the time, so about 30 years ago) and go wingin' around on 'em. They were nice because one person could take it out, go scubaing, and climb back in the thing from the water without tipping over with full gear on.

    They'd go 50MPH on water, sand, snow, whichever. Fun toys.

    However, they weren't street legalable, at least then, and were in the $8-12,000 range to start.

    Sure were fun toys though. DO a GIS for the company name and you can see them. I used to help work on those!

  11. obvious by Anonymous Coward · · Score: 0

    They sink when the power fails.

    1. Re:obvious by Anonymous Coward · · Score: 0

      Obviously, because sealing up a cavity on the bottom that they could use for buoyancy would just be impossible.

    2. Re:obvious by sunderland56 · · Score: 1

      They sink when the power fails.

      That isn't stopping the incredible growth in the marketplace for drones.

      I'd expect a personal drone (i.e. one that can carry you as a payload) to be available way way before a personal hovercraft. Just watch out for the rotating knives.

    3. Re:obvious by hackertourist · · Score: 1

      Personal hovercraft have been available for decades now. They're mostly used as toys because they have lousy directional control: only a rudder in the propwash, unlike large hovercraft which usually have vectored thrust at several points.

    4. Re:obvious by ledow · · Score: 1

      What you just made is called a boat. So why piss about floating that boat on a cushion of air when you could have just pointed that fan behind you and got a faster boat.

      This is exactly the problem with hovercraft. Especially cargo-carrying. If you have to be bouyant enough to cope if the power fails, it's cheaper to let the power fail and be a boat instead.

  12. Waiting for electric propulsion? by gestalt_n_pepper · · Score: 1

    ...while civilian operators wait for electric propulsion to become practical

    I expect they'll have a long, long wait.

    --
    Please do not read this sig. Thank you.
    1. Re:Waiting for electric propulsion? by tomhath · · Score: 1

      Especially when they find out the noise is from the turbines, not the engines.

  13. Are you kidding me? by rsilvergun · · Score: 1

    have you seen the price of eel? I'm all in favor of a hovercraft full of 'em.

    --
    Hi! I make Firefox Plug-ins. Check 'em out @ https://addons.mozilla.org/en-US/firefox/addon/youtube-mp3-podcaster/
  14. Re: That's silly by Anonymous Coward · · Score: 0

    Have a look at the America's Cup AC72 foiling catamarans. They can sail downwind up to 2.8 times faster than the wind is blowing.

  15. truck-boat-hovercraft-truck by PopeRatzo · · Score: 1

    Do not touch the trim.

    https://youtu.be/uByeEObHaBA

    --
    You are welcome on my lawn.
  16. Hong Kong hovercraft by dtmos · · Score: 1

    In the early 1990s one could travel between Hong Kong and Kowloon by hovercraft. It was an interesting change of pace, but I could see how it couldn't compete against the Star Ferry.

  17. Jackie Chan happened by GoodNewsJimDotCom · · Score: 1

    As long as this world has Lamborghinis and Jackie Chan, it is not a safe world for hovercraft.

  18. Re:Very useful by ShanghaiBill · · Score: 1

    The U.S. Marines are making great use of them.

    There are a number of military advantages to hovercraft that don't apply to civilian applications:
    1. They can move up onto the beach
    2. They can move over coral reefs and submerged obstacles
    3. They can move over minefields (the pressure is too dispersed to detonate them)
    But there are also drawbacks:
    1. They are expensive
    2. They require a lot of maintenance
    3. They have a lot of downtime
    4. They are difficult to operate
    5. They are dangerous: they can drift sideways in a turn, and they don't stop quickly.

    Semper Fi

  19. Air Rider Hovercraft by Anonymous Coward · · Score: 0

    There is a company called Air Rider that makes personal hovercraft in Parry Sound. There are lots of small islands in the area that are hard to get to in the winter time. A lot more people are living there full time and use hover craft to travel across the ice in the winter. The other option is to run your skidoo really fast over the ice and hope you don't sink.

  20. Re: Very useful by Anonymous Coward · · Score: 0

    I thought those last five points were also military advantages. :-) :-) :-)

  21. is by Anonymous Coward · · Score: 0

    full of eels?

  22. Economy happened... by Anonymous Coward · · Score: 0

    Just like SST... and when there is no option people choose the only option.

    A Hovercraft is not as economical as a boat and the speed of catamaran ferries is now about 65 km/h, yes a Hovercraft can go MUCH faster but they rarely do so the idea is dead wherever a boat can be used.

  23. Capital Letters anyone? by gsslay · · Score: 2

    What kind of world has it become that "Bond-esque" gets a capital letter, but English and Sino-Russian don't?

  24. Hovercraft by ledow · · Score: 1

    Hovercraft have to LIFT their cargo. It's a stupendous waste of energy compared to other methods (floating their cargo, etc.). Only aircraft, hovercraft and things like cranes actually are required to lift their cargo and all take huge amounts of engineering and energy to do so.

    For a quick sojourn across some water, it's a pointless waste of time and effort to lift the load up and then move it around, by blowing air at the floor - no matter how you skirt it. Helicopters are the only equivalent but they have low weight limits in comparison to everything else for the same reasons - they have to push air down with more energy than their load takes to lift directly.

    As such, I'm not surprised that boats (where you just have to design to have enough bouyancy to counter-balance the load, and then enough energy to slide forward a little) are surpassing hovercraft.

    Hovercraft's only advantage is to be able to seamlessly switch between sea and (relatively flat and open) land. Going beach-to-beach, that's an advantage, but that's quite a rare circumstance - you can't drop off tourist cars to a beach, for example, even between England and France (hell, the English side is mostly sheer cliff-face). And, let's face it, a duck-bus (amphibious vehicle) can do that too and they're dead in the water (sorry) as well.

    Hovercraft are for niche transport, not anything common, heavy, en-masse, or sustained. I'm not surprised they're dying out.

    Electric motors aren't going to save them either. That requires huge weights of batteries which are going to weigh more than their current fuel + engine to provide equivalent power. And, as such, play against their biggest weakness of having to lift their load up before they can move about.

  25. More PoowwwerrrrRRR!! by ripvlan · · Score: 1

    The ex-Top Gear hosts showed their excitement for the craft by attempting to Revive it with better technology (portable Van for commuters) - and in a later episode a race though a city.

    Although - they may have crushed any hopes that the technology would catch on by mocking the noise & mess they create in front of a "high-class" restaurant.

    While driving in the race Clarkson indirectly showed how dangerous the craft can be - tight turns and short stops were impossible. Of course his buffoonery amplified the problems.

  26. you answered your own question by Anonymous Coward · · Score: 0

    THEY ARE LOUD AS HELL

  27. What happened to the hydrofoil? by Anonymous Coward · · Score: 0

    You _have_ been watching the America's cup haven't you? Sailboats at 50MPH... And there are lots of services listed on Wikipedia.