Go Back  PPRuNe Forums > Aircrew Forums > Military Aviation
Reload this Page >

Metric vs Imperial

Wikiposts
Search
Military Aviation A forum for the professionals who fly military hardware. Also for the backroom boys and girls who support the flying and maintain the equipment, and without whom nothing would ever leave the ground. All armies, navies and air forces of the world equally welcome here.

Metric vs Imperial

Thread Tools
 
Search this Thread
 
Old 10th May 2007, 16:10
  #41 (permalink)  
 
Join Date: May 1999
Location: Quite near 'An aerodrome somewhere in England'
Posts: 26,893
Received 348 Likes on 122 Posts
One of the best imperial/metric cock-ups cost NASA around $125 million....

A NASA investigation confirmed earlier reports that aerospace contractor Lockheed Martin botched the design of critical navigation software for the ill-fated Mars Climate Orbiter. While flight computers on the ground did calculations based on pounds of thrust per second, the spacecraft's computer used metric system newtons. A check to make sure the values were compatible was never done.....

So when the Orbiter tried to establish its orbit, instead it either hit the planet or burned up in the atmosphere....

Almost like the ba 747/TriStar cock-up. Allegedly, when ba was rationalising its fleet, it compatred fuel usage of the RB211s in the two aircraft. They found that the RB211 in the TriStar burned X lb/hr, whereas in the 747 it was Y lb/hr. "Hurrah", cried the beancounters, "since X > Y, we'll can the TriStars".

So they did.

Then someone pointed out that 3X < 4Y......

Seemingly the beancounters had overlooked the fact that the 747 has more engines than a TriStar...
BEagle is offline  
Old 10th May 2007, 16:33
  #42 (permalink)  
 
Join Date: Jan 2001
Location: UK
Posts: 887
Likes: 0
Received 0 Likes on 0 Posts
How about we go metric but call it British Standard Metric (BSM). Then, to save face with the Euroworld, we give give the soon-to-be-unemployed Blair the job of promoting BSM as a totally new system, not invented by anyone else. After all, he has already proved himself rather good at that sort of thing.
Zoom is offline  
Old 10th May 2007, 16:37
  #43 (permalink)  
wokkameister
Guest
 
Posts: n/a
Hmmm...involving Blair to improve a situation. I refer you to my earlier post especially the 5000lb bomb bit.

Seems he may have a use afterall....'Here Tony, catch this!'
 
Old 11th May 2007, 03:31
  #44 (permalink)  
 
Join Date: Aug 2003
Location: Sale, Australia
Age: 80
Posts: 3,833
Likes: 0
Received 0 Likes on 0 Posts
ericferret, CFM is a 50/50 parnership between Snecma Moteurs of France, and GE in the U.S.A. Just be thankful the front half is not metric and the rear imperial.
Brian Abraham is offline  
Old 11th May 2007, 06:48
  #45 (permalink)  
I don't own this space under my name. I should have leased it while I still could
 
Join Date: Dec 2002
Location: Lincolnshire
Age: 81
Posts: 16,777
Received 5 Likes on 5 Posts
The Officers' Club at Akrotiri had been on the books for years. Eventually it was decided, build it or can it.

My boss was given the job. The architect drew up plans for a phased building approach:

Front door, bar, pool, the rest to follow as funds permitted. Funny but we never thought of Akrotiri as a one-off tour. Anyway the plans came in.

The plans went to PSA and they did the costing. For PSA the costings were very low and it was decided that we would go for the lot as we could afford the toilets, showers, lounge etc.

Down on the site the builder set out the building. Very small he said. Are you sure you only want a 2ft 6in front door. Doh!

canned
Pontius Navigator is offline  
Old 11th May 2007, 07:35
  #46 (permalink)  
 
Join Date: Aug 2005
Location: Not Ardua enough
Posts: 266
Likes: 0
Received 0 Likes on 0 Posts
How about we go metric but call it British Standard Metric (BSM). Then, to save face with the Euroworld, we give give the soon-to-be-unemployed Blair the job of promoting BSM as a totally new system, not invented by anyone else. After all, he has already proved himself rather good at that sort of thing.


Now if we can just get them to rename the Euro, The Pound. We'd adopt it overnight.
ARINC is offline  
Old 11th May 2007, 10:42
  #47 (permalink)  
 
Join Date: Dec 2005
Location: England
Posts: 1,464
Received 34 Likes on 20 Posts
Brian Abraham

Not to worry, some of my old spanners are so worn they have a tolerance of plus or minus half a mill and will fit anything close!!!!!!!!!!!!!!

I also seem to remember that the army Gazelles (metric) had a couple of a/f screws on the crew seats.

I also watched an unamed european maintenance organisation fitting a radio
mod into a police Squirrel (all metric) using a/f hardware. The strange thing was that when I pointed this out they couldn't see why I was concerned.
ericferret is offline  
Old 11th May 2007, 10:48
  #48 (permalink)  
 
Join Date: Dec 2005
Location: England
Posts: 1,464
Received 34 Likes on 20 Posts
I always thought that when we went to a decimal currency we should have gone 10 pence to a shilling, 10 shillings to a pound. The mathmatical efect would have been the same as the pence pounds option but we would have retained the ability to confound our enemies, (germans, french, well everybody really) with a confusing currency.
ericferret is offline  
Old 11th May 2007, 11:02
  #49 (permalink)  
 
Join Date: Apr 2003
Location: Lincolnshire
Age: 64
Posts: 2,279
Received 37 Likes on 15 Posts
Originally Posted by Brian Abraham
ericferret, CFM is a 50/50 parnership between Snecma Moteurs of France, and GE in the U.S.A. Just be thankful the front half is not metric and the rear imperial.
Ahh, that explains it, the whining comes from France, and the hot air from the USA.
ZH875 is online now  
Old 11th May 2007, 11:26
  #50 (permalink)  
 
Join Date: Feb 2007
Location: Exiled in England
Age: 48
Posts: 1,015
Likes: 0
Received 0 Likes on 0 Posts

To use crude net text type speech......ROTFLMFAO
cornish-stormrider is offline  
Old 11th May 2007, 12:11
  #51 (permalink)  
 
Join Date: Aug 2003
Location: Sale, Australia
Age: 80
Posts: 3,833
Likes: 0
Received 0 Likes on 0 Posts
I thought it was the French who blew hot AND cold. Sorry.
Brian Abraham is offline  
Old 11th May 2007, 12:22
  #52 (permalink)  
 
Join Date: Sep 1998
Location: wherever
Age: 55
Posts: 1,616
Likes: 0
Received 0 Likes on 0 Posts
One of the best imperial/metric cock-ups cost NASA around $125 million....

A NASA investigation confirmed earlier reports that aerospace contractor Lockheed Martin botched the design of critical navigation software for the ill-fated Mars Climate Orbiter. While flight computers on the ground did calculations based on pounds of thrust per second, the spacecraft's computer used metric system newtons. A check to make sure the values were compatible was never done.....

So when the Orbiter tried to establish its orbit, instead it either hit the planet or burned up in the atmosphere....
This is NASAs take on it. I have friends at LM who say they asked NASA if they wanted metric or "English" as they call it? The reply from NASA was whatever you like.

Still makes me laugh.
FE Hoppy is offline  
Old 11th May 2007, 14:25
  #53 (permalink)  
 
Join Date: Sep 2004
Location: Devon
Age: 58
Posts: 280
Likes: 0
Received 0 Likes on 0 Posts
Quote
"I also watched an unamed european maintenance organisation fitting a radio
mod into a police Squirrel (all metric) using a/f hardware. The strange thing was that when I pointed this out they couldn't see why I was concerned."

I don't blame them the logic is they are not the one's who are going to use it
Typical Continent Attitude Sod the rest as long as we are all right
(I might just have opened a can of worms with that comment )
sikeano is offline  
Old 11th May 2007, 14:28
  #54 (permalink)  
 
Join Date: Dec 2005
Location: England
Posts: 1,464
Received 34 Likes on 20 Posts
You dont have to work in metric and imperial for a fine cock up.

During the war the navy launched a a number of RAF fighters at maximum range from a carrier to Malta. The idea being to avoid the enemy bombers based in Italy.

Trouble was the RAF quoted their max range in statute miles whereas the navy were operating in nautical miles.

A number of pilots ended up with wet feet.
ericferret is offline  

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.