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20 years ago now but a friend from Merseyside twice owned one over a three year period and was part of a 'club' which had something of a rolling membership. Once you'd totted-up enough points to lose your motorbike/car licence you bought a jet ski and played on that for the summer, then when you got your road licence back again, you sold-on the jet-ski to whomever had collected enough points to get a ban.... the ones I've seen are usually ridden by middle aged men not youngsters...
Be some strange physics if true....
Didnt the leander class have a great party trick in that it could stop within its own length if needed?
Leander class Frigate.................lovely handling, much better than the later type 22 and 23There's always been idiots around on fast moving craft. I still remember the day some years ago one cut across and had an engine failure immediately in front of us in the channel just south of the Hoe whilst exiting Plymouth. Rather stupid given we were a Leander class frigate, from the bridge wing I could hear the passengers screams, fortunately our skipper was a good ship handler and had his wits about him, not many would have gone full astern in that location and avoided a collision.
Be some strange physics if true.
Power is steam turbines, shafts and props. Displacement about 2600 tons. 110m long.
So at 28kts = 14.4 m/s it's covering its own length in about 7.6 seconds.
I can't see any marine propulsion system known to man, including the mythical caterpillar drive in Red Oktober, being able to stop 2800 tons in 7 seconds by reversing the thrust on some ancient props powered by steam turbines that take 2 minutes to spin down.
Sorry I think this is probably wrong...
Maybe if it hit a breakwater? Would work once I guess.
OK so maybe a bit of an exaggeration, but even at 10 kts I'm doubtful. That's 22 seconds. 0.6g.The Leander would not be doing 28 kn in the channel exiting Plymouth, more like 10 to 12 kn
The steam turbines do not take 2 minutes to run down. Even the gas turbines with reversing gearboxes
don't take more than 10 to 15 seconds from full ahead to full astern.
The steam supply feed into turbine is reversed and the reverse propulsion is available in a few seconds.
The problem they have is going from ahead to stop as the engineers have to get rid of steam
pressure and the build back up for drive again when needed.
Going from ahead immediately to astern uses the same steam but just fed into the turbine the other way,
and is much quicker to react.
Stopping in its own length would be possible from 10 kn or so but not at 28.
I much preferred my Leander steam to T22 gas turbine days. I don't know about the physics but we slowed enough not to hit it, allow it to restart its outboard and move on. And yes we'd have been doing 10knots or thereabouts, 28 would probably have put us into the speeding category and a telling off from QHM.
That'd be some sightScala,you are probably right (can't argue with physics), a ship length is a pretty quick. But I cant remember
it being a lot more. I only did a week navigation training on the Leander, before going to
navigate a type 42 destroyer. It would be safe to say if that same boat had
pulled across the bow of a 42, it may not have survived!!
And of course responsibly is subjective. I think Yachties sailing around zig zagging all over the place (I think they call it tacking) when they have a perfectly good engine they could use and go in a straight line is being irresponsible.I and I'm sure the overwhelming majority would agree with you, the key word though is 'responsibly'
Are you for real?...
I think Yachties sailing around zig zagging all over the place (I think they call it tacking) when they have a perfectly good engine they could use and go in a straight line is being irresponsible.
Tacking of course was used when boats did not have engines and had no other option.... Now there is another option some still like to tack all over the place and expect others to avoid them. Must be some sort of regression thing