DeHavilland Comet 1 Design 1

[CometNut]

thread2-491869
Hello, new to this forum. The above discussion was Closed, so I'm starting a new discussion.

I think there were some misstatements in the other discussion. The Comet 1 had a fuselage diameter of 10' 3", and the general skin thickness was 0.040". I forget what alloy was used, but it was of a more-brittle nature.

DeHavilland had several punch-riveting processes, but attached is a photo of an Erco punch-riveting machine used by DeHavilland for the Comet 1. In this photo, three 22' 0" x 2' 6" panels are being double-row-riveted to form a lap joint. The Erco machine had manual and automatic pitch movement controls, enabling the operator to move the pitch to the next riveting location. I believe it punched the holes, dimpled them, and then riveted them.

 

[rb1957]

not my memory ... Nimrod just became too expensive. Yes, there was an airshow accident. Yes, there could be an issue with the systems (not if they were new builds)

"Hoffen wir mal, dass alles gut geht !"
General Paulus, Nov 1942, outside Stalingrad after the launch of Operation Uranus.

 

[WKTaylor]

RB.. I think that the RAF mishap investigation opened the can-o-worms and identified several serious/complex/expensive systems problems. Scared them and decision was made... The jets were removed from service ~2011. I saw a 'briefing on the Nimrod issues'... just can't remember 'where/when'. Here is some google results.

The crash near Toronto [into lake Ontario] during a demonstration flight...

1995 Royal Air Force Nimrod MR2 crash

https://en.wikipedia.org/wiki/1995_Royal_Air_Force_Nimrod_MR2_crash

Royal Air Force Jet Crashes in Toronto During an Airshow

https://www.youtube.com/watch?v=-ftXLyBqNKU

And wartime accident 2006...

2006 Royal Air Force Nimrod crash

https://en.wikipedia.org/wiki/2006_Royal_Air_Force_Nimrod_crash

RAF Nimrod air crash investigation delivers devastating verdict

https://www.theguardian.com/uk/2009/oct/28/nimrod-crash-inquiry-blames-mod

The Tragic Story Of Nimrod XV230

https://www.youtube.com/watch?v=QXEFgJKZZ4g

Regards, Wil Taylor
o Trust - But Verify!
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation, Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", HBA forum]
o Only fools and charlatans know everything and understand everything." -Anton Chekhov

 

[rb1957]

true, accidents have many fathers. I think the way the plane was operated, without a strong safety culture, (much like many other spectacular accidents) had a lot to do with it. Working with an old airframe and sys architecture also. Yes, much had been spent, and much more needed. I think ultimately it came down to money.

"Hoffen wir mal, dass alles gut geht !"
General Paulus, Nov 1942, outside Stalingrad after the launch of Operation Uranus.

 

[Hoxton123]

At the end of the Nimrod MRA4 saga, Boeing suddenly announce that they were closing the AWACs Sentry production line and would be taking final orders.

Message to UK 'buy AWACs or you will have nothing’. So UK bought seven E3D Sentry, to be based at RAF Waddington, NIMROD was cancelled.

 

[Ng2020]

E3 sentry is not a maritime patrol aircraft. Is it comparable?

 

[WKTaylor]

RAF is acquiring/operating Boeing P-8 Poseidon's for maritime patrol...

https://www.raf.mod.uk/aircraft/poseidon-mra1/

Regards, Wil Taylor
o Trust - But Verify!
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation, Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", HBA forum]
o Only fools and charlatans know everything and understand everything." -Anton Chekhov