A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Military Aviation
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Hawk 200 questions



 
 
Thread Tools Display Modes
  #3  
Old July 28th 03, 08:04 AM
Tony Williams
external usenet poster
 
Posts: n/a
Default

Greg Hennessy wrote in message . ..

It was a silly NiH decision not to fit uk harriers with a GAU-12 in the 1st
place.

Never mind taking the sensible alternative & reusing the BK-27s which were
allegedly removed from RAF GR1s and replaced with ballast.


IMO the really silly (and extremely expensive) decision was to develop
the 25mm Aden in the first place, in a calibre not used by the
British, when the effectively identical 27mm Mauser was already in
service in the Tornado. It would have been a waste of resources even
if the design had worked...

Tony Williams
Military gun and ammunition website: http://www.quarry.nildram.co.uk
Military gun and ammunition discussion forum:
http://forums.delphiforums.com/autogun/messages/
  #5  
Old July 28th 03, 04:25 PM
phil hunt
external usenet poster
 
Posts: n/a
Default

On Mon, 28 Jul 2003 14:59:01 +0100, Greg Hennessy wrote:

IMO the really silly (and extremely expensive) decision was to develop
the 25mm Aden in the first place, in a calibre not used by the
British, when the effectively identical 27mm Mauser was already in
service in the Tornado. It would have been a waste of resources even
if the design had worked...


One wonders what inducements were given to allow the design to proceed at
public expense in the 1st place. it never ever made any sort of commercial
sense.


Indeed one does wonder.

--
A: top posting

Q: what's the most annoying thing about Usenet?

  #6  
Old July 28th 03, 09:32 PM
Paul J. Adam
external usenet poster
 
Posts: n/a
Default

In message , Tony
Williams writes
Greg Hennessy wrote in message
...
It was a silly NiH decision not to fit uk harriers with a GAU-12 in the 1st
place.

Never mind taking the sensible alternative & reusing the BK-27s which were
allegedly removed from RAF GR1s and replaced with ballast.


IMO the really silly (and extremely expensive) decision was to develop
the 25mm Aden in the first place, in a calibre not used by the
British, when the effectively identical 27mm Mauser was already in
service in the Tornado. It would have been a waste of resources even
if the design had worked...


Not seen any particularly convincing rationale myself, other than "How
do we keep the ADEN works busy?"

What I find curious is why, when the ADEN 25 fell over, the Harriers
couldn't just shrug, reprogram the gunsight and put the old pods back
on. Failing to maintain a common interface seems _really_ silly, and I'm
really curious as to why an iteration of a revolver cannon is allowed to
be so incompatible with its predecessor. (After all, if ADEN 25 is so
good, why not go for a common interface and hang it off Sea Harrier and
Hawk too?)

--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam
  #7  
Old July 28th 03, 11:12 PM
Greg Hennessy
external usenet poster
 
Posts: n/a
Default

On Mon, 28 Jul 2003 21:32:48 +0100, "Paul J. Adam"
wrote:



Not seen any particularly convincing rationale myself, other than "How
do we keep the ADEN works busy?"

What I find curious is why, when the ADEN 25 fell over, the Harriers
couldn't just shrug, reprogram the gunsight and put the old pods back
on. Failing to maintain a common interface seems _really_ silly,


If the french could manage it with the DEFA 554 one wonders why.

and I'm
really curious as to why an iteration of a revolver cannon is allowed to
be so incompatible with its predecessor. (After all, if ADEN 25 is so
good, why not go for a common interface and hang it off Sea Harrier and
Hawk too?)


There was something exceedingly fishy about that whole process. What spin
was feed to the RAF to forgo factory fitting Harriers with equalisers ?


greg


--
$ReplyAddress =~ s#\@.*$##; # Delete everything after the '@'
Alley Gator. With those hypnotic big green eyes
Alley Gator. She'll make you 'fraid 'em
She'll chew you up, ain't no lie
  #8  
Old July 29th 03, 08:18 AM
Tony Williams
external usenet poster
 
Posts: n/a
Default

"Paul J. Adam" wrote in message ...

What I find curious is why, when the ADEN 25 fell over, the Harriers
couldn't just shrug, reprogram the gunsight and put the old pods back
on. Failing to maintain a common interface seems _really_ silly, and I'm
really curious as to why an iteration of a revolver cannon is allowed to
be so incompatible with its predecessor. (After all, if ADEN 25 is so
good, why not go for a common interface and hang it off Sea Harrier and
Hawk too?)


The Aden 25 was designed to be compatible with the earlier Adens, so
it could just slot in as a replacement, which was the Grand Plan.
Unfortunately it was unable to meet the RAF's requirements, which
translated means that it was too unreliable and wore out too quickly.
And this was after ten years of massive effort to make it work - the
first guns were being tested at the end of the 1980s and production
contracts were being awarded from around 1990 to as late as 1997, but
it wasn't finally canned until 1999 when about 100 guns had been made.

Revolver cannon are very tricky to get working properly, with precise
ignition timing being essential. The 25x137 ammo is of course
percussion-primed, whereas the ammo for all other revolvers has used
the more precise electric priming, which does make me wonder if they
were tackling an impossible job.

There is a body of opinion which dislikes aircraft guns. The vibration
upsets the instrumentation, the muzzle gasses can be corrosive, and if
all goes well missiles will do the job....sadly, this viewpoint
ignores the fact that no military action has ever followed the script,
because the enemy has his own scriptwriters.

Tony Williams
Military gun and ammunition website: http://www.quarry.nildram.co.uk
Military gun and ammunition discussion forum:
http://forums.delphiforums.com/autogun/messages/
  #9  
Old July 29th 03, 09:49 AM
Greg Hennessy
external usenet poster
 
Posts: n/a
Default

On 29 Jul 2003 00:18:21 -0700, (Tony
Williams) wrote:


Revolver cannon are very tricky to get working properly, with precise
ignition timing being essential. The 25x137 ammo is of course
percussion-primed, whereas the ammo for all other revolvers has used
the more precise electric priming, which does make me wonder if they
were tackling an impossible job.


The timing issue with percussion primers has been known for decades,
therefore it would suggest that the whole project was just a thinly
disguised handout.

Someone at the RAF had to have asked the same questions w.r.t feasability
of using percussion primed rounds in such an application.

If TPTB were actually serious about providing the harrier with cannon and
commonality of ammunition. A license built GSH-30 or 301 firing what the
Rarden fires would be rather hard to argue against.

But that would have a high NiH factor. No scope for subsidising the
domestic monopoly supplier there.



There is a body of opinion which dislikes aircraft guns. The vibration
upsets the instrumentation, the muzzle gasses can be corrosive, and if
all goes well missiles will do the job....sadly, this viewpoint
ignores the fact that no military action has ever followed the script,
because the enemy has his own scriptwriters.


Quite. It was interesting to watch an interview with a Tornado pilot where
he detailed having do gun passes in close support of friendlies during the
recent Iraq conflict.





greg

--
$ReplyAddress =~ s#\@.*$##; # Delete everything after the '@'
Alley Gator. With those hypnotic big green eyes
Alley Gator. She'll make you 'fraid 'em
She'll chew you up, ain't no lie
  #10  
Old July 29th 03, 01:29 PM
Nick Pedley
external usenet poster
 
Posts: n/a
Default


"Greg Hennessy" wrote in message
...
On Mon, 28 Jul 2003 21:32:48 +0100, "Paul J. Adam"
wrote:


and I'm
really curious as to why an iteration of a revolver cannon is allowed to
be so incompatible with its predecessor. (After all, if ADEN 25 is so
good, why not go for a common interface and hang it off Sea Harrier and
Hawk too?)


There was something exceedingly fishy about that whole process. What spin
was feed to the RAF to forgo factory fitting Harriers with equalisers ?

We couldn't afford to clone that many Edward Woodwards? :-)

Nick


 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Homebuilt Aircraft Frequently Asked Questions (FAQ) Ron Wanttaja Home Built 0 June 2nd 04 07:17 AM
Homebuilt Aircraft Frequently Asked Questions (FAQ) Ron Wanttaja Home Built 0 May 1st 04 07:29 PM
Homebuilt Aircraft Frequently Asked Questions (FAQ) Ron Wanttaja Home Built 0 April 5th 04 03:04 PM
Homebuilt Aircraft Frequently Asked Questions (FAQ) Ron Wanttaja Home Built 2 February 2nd 04 11:41 PM
Homebuilt Aircraft Frequently Asked Questions (FAQ) Ron Wanttaja Home Built 1 January 2nd 04 09:02 PM


All times are GMT +1. The time now is 03:58 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 AviationBanter.
The comments are property of their posters.