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Juan Carlos / Canberra Class LHD

This is a discussion on Juan Carlos / Canberra Class LHD within the Navy & Maritime forum, part of the Global Defense & Military category; Originally Posted by KiwiRob There's a difference between the class design and the working drawings to actually build it. So ...


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Old March 8th, 2017   #556
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There's a difference between the class design and the working drawings to actually build it. So I doubt anyone has done the working drawings.
Thanks for pointing that out, I had no idea at all, really, totally clueless !!!

I really think some need to pull their collective heads in on not just this thread but the forum as a whole ! The amount of chest beating going on at the moment is ridiculous, and many of us have been around long enough on this site to understand each other, where they are coming from and their knowledge base to not feel the need to point out the obvious.

We have also been around long enough to know this very discussion has been had numerous times over the years as well

Anyway onward and upward......
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Old March 8th, 2017   #557
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There's a difference between the class design and the working drawings to actually build it. So I doubt anyone has done the working drawings.
As discovered on the AWD build where very little production design or engineering was budgeted. The powers that be anticipating a simple "build to print" were somewhats shocked by the result, even though I was there when this very thing was brought up at CDR and relayed to them.
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Old March 8th, 2017   #558
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Just quick question, after the working drawing are done are all designs validated by tank testing and can submarines designs be also tested in a tank to give an idea on flow noises?
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Old March 9th, 2017   #559
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Just quick question, after the working drawing are done are all designs validated by tank testing and can submarines designs be also tested in a tank to give an idea on flow noises?
a lot of the acoustic amplification is not generated by the hull - which is why subs get put into the chook shed...
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Old March 9th, 2017   #560
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a lot of the acoustic amplification is not generated by the hull - which is why subs get put into the chook shed...

Not sure what you mean by chook shed, but with all that wire only thing I can think of is a faraday cage, I doubt you mean that.
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Old March 9th, 2017   #561
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Not sure what you mean by chook shed, but with all that wire only thing I can think of is a faraday cage, I doubt you mean that.
its an acoustic array which the sub is driven into and then everything is mapped - engines running, engines off etc...

its one of the unsung technologies where an australian company also developed a portable version which was 1/10th of the cost of the fixed version and within 5% of the margin of error

they look like a famers woolshed with all the sheeting and cladding missing
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Old March 22nd, 2017   #562
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Video released by Pongo Airlines of their embarked Tiger ARH FOCFT in HMAS CANBERRA.

Some interesting scenery and detail scattered through the video.

https://youtu.be/IR2datwDC9k
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Old March 22nd, 2017   #563
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Video released by Pongo Airlines of their embarked Tiger ARH FOCFT in HMAS CANBERRA.

Some interesting scenery and detail scattered through the video.

https://youtu.be/IR2datwDC9k
Great video there.

@2.53the pylon of the ARH seems to have quite a significant amount of scratches.. Could anyone point out what could be associated with this type of wear and tear?
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Old March 22nd, 2017   #564
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Video released by Pongo Airlines of their embarked Tiger ARH FOCFT in HMAS CANBERRA.

Some interesting scenery and detail scattered through the video.

https://youtu.be/IR2datwDC9k
Interesting, seeing the tiger rotors fold manually. Much easier than the Chinooks. I think the scratches are from getting into and out of the aircraft.
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Old March 23rd, 2017   #565
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Great video there.

@2.53the pylon of the ARH seems to have quite a significant amount of scratches.. Could anyone point out what could be associated with this type of wear and tear?
My guess would be surface damage from launches ?

What a pain to fold the rotors !! Bring on the Z's at least they have a semiautomatic folding blade capability designed for operation on LHD's

Cheers
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Old March 24th, 2017   #566
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My guess would be surface damage from launches ?

What a pain to fold the rotors !! Bring on the Z's at least they have a semiautomatic folding blade capability designed for operation on LHD's

Cheers
Has there been an issue with Canberra of late?

Has she returned to Sydney very early in what was supposed to be six weeks at sea?

I have seen a sketchy report elsewhere that I have not seen backed up.

Last edited by Trackmaster; March 24th, 2017 at 07:12 AM. Reason: Repetition
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Old March 24th, 2017   #567
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Has there been an issue with Canberra of late?

Has she returned to Sydney very early in what was supposed to be six weeks at sea?

I have seen a sketchy report elsewhere that I have not seen backed up.
2 days ago in the RAN thread, Assail mentioned the same suspicion, based on rumblings but with a little detail...
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I heard some rumblings that Canberra experienced some quite serious mechanical engineering issues during the Tiger trials and had to return to FBE.
Has anyone more info?
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Old April 1st, 2017   #568
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My guess would be surface damage from launches ?

What a pain to fold the rotors !! Bring on the Z's at least they have a semiautomatic folding blade capability designed for operation on LHD's

Cheers
Auto folding for any helicopter certainly has benefits, but also a weight penalty. Sometimes there is not a golden answer as to which trade off is best.
Flight deck utility V lift capacity.

Regards S.
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Old April 2nd, 2017   #569
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Flight deck utility V lift capacity.

Regards S.
Can you clarify what you mean by "lift capacity" and in what context ?

Cheers
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Old April 2nd, 2017   #570
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Can you clarify what you mean by "lift capacity" and in what context ?

Cheers
Chatting some years ago with a uniform in with the Taipan about the auto folding mechanism for the helicopter the weight of the system was over 100 kg. Not an insignificant bit of ballast to fly with when you think of what you could substitute that weight for in lift capacity. In effect you lose a passenger of extra fuel or what ever else you can substitute for that weight. Chatting again at the recent air show at Avalon I had another conversation with one of the Taipan maintainers about the benefits and trade offs of auto folding blades.He mentioned his team of threes best time for a manual fold of all four blades was under 14 minutes. Also discussed was the PAX lift capacity of Taipan and what was interesting was that the numbers were different for maritime operations so as to provide extra redundancy for a single engine loss over water......... even less PAX carried.
So yes auto folding makes things quick but I'm coming around to the trade off's in the weight of a auto folding system versus some extra weight/lift capacity for any type of helicopter sacrificing auto folding convenience.

Regards S
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