Navy ship... Emergency stop
- Thread starter Nauti Fox
- Start date
Bandit
Well-Known Member
I was on Condor 10 a 74m wavepiercing catamaran built by Incat in Tasmania. We did a crash stop trial when she was in service Ci to UK a full load of cars about 90 and 500 + passengers.
Full speed 36 knots to stop about 1.5 boat lengths so about 110 metres its very impressive, all passengers were asked to sit down first.
The Diesels on this boat stay at cruising RPM and the reversing bucket just comes over the jet nozzle and reverses the water flow. Its also very smooth.
Most boats cant stop in anywhere near that distance.
Full speed 36 knots to stop about 1.5 boat lengths so about 110 metres its very impressive, all passengers were asked to sit down first.
The Diesels on this boat stay at cruising RPM and the reversing bucket just comes over the jet nozzle and reverses the water flow. Its also very smooth.
Most boats cant stop in anywhere near that distance.
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longjohnsilver
Well-Known Member
Very impressive, shame they weren’t also filming from a drone overhead.
Ian h
Well-Known Member
This looks like fun , Jet drives again
ShaneAtSea
Well-Known Member
Ive got a friend in the navy and he told me the most incredible thing he ever experienced was on a aircraft carrier that does full speed turns at 30 knots 
Greg2
Well-Known Member
Done quite a bit of time on a Redbay 12m cabin rib with twin Hamilton water jets and she will do just over 40 knots. When we trialled her putting the buckets in astern at full chat was little short of incredible! Holding on was key! ?
Dino
Well-Known Member
I remember reading that when one of the big jet ski companies got into building those small jet boats, they started fitting them with very powerful engines. On one of the sea trials they dropped the bucket at full revs and the boat went 15ft under water, then was catapulted 20 back in the water. From then on the fitted a rev limiter to the reverse lever.
Hot Property
Well-Known Member
Ive got a friend in the navy and he told me the most incredible thing he ever experienced was on a aircraft carrier that does full speed turns at 30 knots
The Royal Navy normally chooses to do a manouvre like that when everyone is sitting down for lunch.......
springer
Well-Known Member
Type 42 Class Destroyers able to "crash stop" from 30Kt to standstill in 1.5 x ships length, approx 700 feet! 2 off 56.000 Hp Olympus gas turbines wound down from full chat, 2 of 5 blade CP prop from full ahead to full astern then pour in the fuel and keep clear of the wake trying to drown the Lynx helo in the hanger. Type 21 Amazon class had same machinery but weighed about 30% less than Type 42 and thus was even more impressive. For all those worried about fuel consumption, each Olympus at full power would burn just over 1 metric tonne of fuel per hour.
Greg2
Well-Known Member
I served on a 42 and remember the performance when switching from Tynes to Olympus! ?
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LBRodders
Well-Known Member
^^ skimmer dits ?
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john_morris_uk
Well-Known Member
But you couldn’t run both engines at max for long as the fuel scrubbers couldn’t keep up with the demand from the Olympus gas turbines! Sprinting only IIRC.
The rising whistling noise from the funnel etc as you push the levers towards max is a very evocative sound.
john_morris_uk
Well-Known Member
Careful or we’ll start talking about runs ashore. (The ones most submariners don’t ever get unless you count Faslane or Guz... and not even Guz nowadays I believe?)
LBRodders
Well-Known Member
Ashamed to say that I served my time, 2 x 42s and a CVS before turning to sundodging.
For a bomber queen I did remarkably well, more runs ashore than patrols!
Greg2
Well-Known Member
Not sure I would count Faslane as a run ashore - went there for R&R when on a NI patrol boat and there wasn’t much to commend it - Helensburgh was particularly dismal if memory serves. Guz is a shadow of its former self - the Strip doesn’t really exist now ☹
springer
Well-Known Member
Diamond Lils anyone? Only those in the know will get the reference
Gibeltarik
Well-Known Member
Stretched Type 22 - same machinery. Leaving Kiel - compulsory pilot embarked - Captain showing off full power performance before dropping the pilot. Demonstrated crash stop - we stopped forward motion but slewed to port and continued sideways towards pilot cutter! Somehow it was the Engineer Officer's fault that we frightened the pilot cutter!
Mr Googler
Well-Known Member
I like the bloke on the right putting his hood up so he doesn’t get wet ???
john_morris_uk
Well-Known Member
They don’t seem to notice/care that they leave a trail of life preservers behind.
john_morris_uk
Well-Known Member
I lived in Helensborough for a couple of years in 2013-14 and really enjoyed my time there. It had improved dramatically since I first visited in the early 90’s.