Free 173 Best Homemade Tools eBook:  
Remove advertisements
Page 8 of 11 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 LastLast
Results 71 to 80 of 103

Thread: English/metric measurement error in the Mars Climate Orbiter

  1. #71
    Toolmaker51's Avatar
    Join Date
    Feb 2016
    Location
    Midwest USA
    Posts
    1,649
    Thanks
    3,083
    Thanked 1,495 Times in 894 Posts

    Toolmaker51's Tools
    Where then do we quench our thirst for lowly but almighty zero's?
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

  2. #72
    MeJasonT's Avatar
    Join Date
    Jun 2016
    Location
    Lake District in UK
    Posts
    163
    Thanks
    163
    Thanked 139 Times in 78 Posts

    MeJasonT's Tools
    Yep I agree - both
    its worked brilliantly for me over the last 20907248182351.028089724211549023 Kmh or 48 years if you want to be technical.
    I often measure steel with mixed metric and imperial measurements sometime its easier to see an exact mark at 4 inch's than give an approximate mm measurement.
    I do think the American system has more merit than the old English measurements like Whitworth etc. Perhaps where we are getting it wrong is trying to standardise. Old aircraft flew and new ones fail due to errors ? Just ignore that small section of aviation history where the comets kept falling out of the sky - funny they still do, the RAF has lost a few in the last 20 years. (otherwise known as Nimrod or comet mk4).

    https://en.wikipedia.org/wiki/De_Havilland_Comet

    And these are the brand new ones we scrapped with zero hours on the clock (there you go toolmaker a zero for you).
    https://www.theregister.co.uk/2011/0...rod_scrappage/
    Last edited by MeJasonT; 04-15-2019 at 03:08 AM.
    Smoke makes electronics work, if it escapes the equipment breaks.
    Got to keep the smoke in. bla bla bla - TUNE FOR MAXIMUM SMOKE that's what i say.

  3. #73
    MeJasonT's Avatar
    Join Date
    Jun 2016
    Location
    Lake District in UK
    Posts
    163
    Thanks
    163
    Thanked 139 Times in 78 Posts

    MeJasonT's Tools
    It gets worse we we trust computers which are really bad at math. And yet the disasters are not just for home users.
    https://www.theregister.co.uk/2019/0...ndows_crashes/

    Sort of off topic but still on if you get my drift is this artical i came across on the same search for comet info

    https://www.theregister.co.uk/2018/1...ghty_language/

    Have i read this correctly googles filtering server searched its own database and shut itself down ?
    Are they getting fed up of our searches containing f-ing google this that or the other when their service is less than perfect.

    We have gone full circle to the early space crashes that involved the dreaded missing jump returns in code leading to code stalling and the inevitable crash.

    When are programmers going to stop being narcissists and admit they are not perfect.
    we will all suffer the day they remove the OFF switch.
    Last edited by MeJasonT; 04-15-2019 at 03:34 AM.
    Smoke makes electronics work, if it escapes the equipment breaks.
    Got to keep the smoke in. bla bla bla - TUNE FOR MAXIMUM SMOKE that's what i say.

  4. #74
    Tonyg's Avatar
    Join Date
    Apr 2016
    Location
    Centurion, South Africa
    Posts
    33
    Thanks
    204
    Thanked 12 Times in 10 Posts
    Quote Originally Posted by MeJasonT View Post
    It gets worse we we trust computers which are really bad at math. And yet the disasters are not just for home users.
    https://www.theregister.co.uk/2019/0...ndows_crashes/
    Computers are rarely bad at mathematical computations, however, programmers often are.

  5. The Following User Says Thank You to Tonyg For This Useful Post:

    MeJasonT (04-15-2019)

  6. #75
    MeJasonT's Avatar
    Join Date
    Jun 2016
    Location
    Lake District in UK
    Posts
    163
    Thanks
    163
    Thanked 139 Times in 78 Posts

    MeJasonT's Tools
    A rant about PC reliability.

    Its a shame that they are only able to do addition and subtraction to achieve complex computations and are truncated by there limited word length of bits, as for random numbers even using monte carlo is realistically beyond the capability of a PC to truly generate a random number. The fact they are cyclic is also hindrance.
    And yet we argue the far end of a fart that computers are reliable and the operators/programmers are to blame. Programmers are to blame, they are trying to convince us we need to have our every whim catered for by machines. If you build something really reliable and it makes loads of money upgrade it to a new one so the old reliable one becomes obsolete so you can sell an unfinished glitchy unreliable one.
    Its a pain in the bum hole that our governments have decided our whole life will be online to acquire benefits, pay bills, apply for licences etc and yet the reliability of the whole infrastructure is questionable at best.
    Smoke makes electronics work, if it escapes the equipment breaks.
    Got to keep the smoke in. bla bla bla - TUNE FOR MAXIMUM SMOKE that's what i say.

  7. #76

    Join Date
    Oct 2016
    Posts
    88
    Thanks
    54
    Thanked 52 Times in 28 Posts
    Quote Originally Posted by MeJasonT View Post
    Yep I agree - both
    its worked brilliantly for me over the last 20907248182351.028089724211549023 Kmh or 48 years if you want to be technical.
    I often measure steel with mixed metric and imperial measurements sometime its easier to see an exact mark at 4 inch's than give an approximate mm measurement.
    I do think the American system has more merit than the old English measurements like Whitworth etc. Perhaps where we are getting it wrong is trying to standardise. Old aircraft flew and new ones fail due to errors ? Just ignore that small section of aviation history where the comets kept falling out of the sky - funny they still do, the RAF has lost a few in the last 20 years. (otherwise known as Nimrod or comet mk4).

    https://en.wikipedia.org/wiki/De_Havilland_Comet

    And these are the brand new ones we scrapped with zero hours on the clock (there you go toolmaker a zero for you).
    https://www.theregister.co.uk/2011/0...rod_scrappage/
    I assume from this that you have only looked at distances in American Imperial measures. The liquid volumes are about 20% smaller than the English equivalents. This all goes back to the American Pint being 16 ounces and the original English pint being 20 ounces. It really would be simpler if everyone used the Metric system. Powers of ten for multipliers.

  8. The Following 2 Users Say Thank You to Drew1966 For This Useful Post:

    MeJasonT (04-15-2019), volodar (04-15-2019)

  9. #77
    MeJasonT's Avatar
    Join Date
    Jun 2016
    Location
    Lake District in UK
    Posts
    163
    Thanks
    163
    Thanked 139 Times in 78 Posts

    MeJasonT's Tools
    I have now got to a point in life where i have decided to have the attitude of whatever floats the boat, 4oz such an insignificant figure.
    Smoke makes electronics work, if it escapes the equipment breaks.
    Got to keep the smoke in. bla bla bla - TUNE FOR MAXIMUM SMOKE that's what i say.

  10. #78
    [email protected] tonyfoale's Avatar
    Join Date
    Nov 2016
    Location
    Spain
    Posts
    699
    Thanks
    274
    Thanked 1,150 Times in 356 Posts

    tonyfoale's Tools
    Quote Originally Posted by Drew1966 View Post
    It really would be simpler if everyone used the Metric system. Powers of ten for multipliers.
    Then we would not be able to use those lovely rods, poles and perches. We would have to keep chains of course, how else could you lay out a cricket pitch? One could not expect the MCC to go metric, just not cricket old boy.
    I was always aware of the time spent (wasted) on learning s p arithmetic in school. At least the Americans have had the good sense to always use decimal currency, so it seems strange that most are resistant to the idea of decimal measurements in general.
    Apart from the decimal nature of the ISO metric system the thing that I like the best is the consistency of the units. If you forget what certain derived units are you only have to use the base units of kg, m and sec to get reminded.

    What is a newton - we know it is a force and as F=ma a N must be kg.m/sec^2
    What is a joule - it is work so it has to be force x distance which is Nm. So 1 joule = 1 Nm
    What is a watt - it is power so it has to be work/time which is joule/sec or Nm/sec So 1 watt = 1 joule/sec = 1 Nm/sec
    What is a pascal - it is pressure so it has to be force/area which is N/m^2 So 1 pascal = 1 N/m^2

    That is as simple as it gets. This consistency of the units reduces the chance of errors greatly.
    Do not just think of the ISO metric system as being only a decimal system, it goes much further than that.

  11. The Following 3 Users Say Thank You to tonyfoale For This Useful Post:

    Drew1966 (04-15-2019), MeJasonT (04-15-2019), volodar (04-15-2019)

  12. #79
    MeJasonT's Avatar
    Join Date
    Jun 2016
    Location
    Lake District in UK
    Posts
    163
    Thanks
    163
    Thanked 139 Times in 78 Posts

    MeJasonT's Tools
    I'm currently making a tripod stand for a garden sculpture/armillary one leg is 15 3/4 " and the other two are 40mm the circumference at the base is 7 3/4" and only one fathom and that is can anyone fathom out what the hell I'm supposed to be doing - just yards away from reality.

    why is a Newton in metric anyways, isn't he pre decimalisation
    Smoke makes electronics work, if it escapes the equipment breaks.
    Got to keep the smoke in. bla bla bla - TUNE FOR MAXIMUM SMOKE that's what i say.

  13. The Following User Says Thank You to MeJasonT For This Useful Post:

    Toolmaker51 (04-15-2019)

  14. #80
    mklotz mklotz's Avatar
    Join Date
    Aug 2015
    Location
    LA, CA, USA
    Posts
    1,743
    Thanks
    128
    Thanked 3,332 Times in 1,145 Posts

    mklotz's Tools
    Quote Originally Posted by tonyfoale View Post
    Apart from the decimal nature of the ISO metric system the thing that I like the best is the consistency of the units. If you forget what certain derived units are you only have to use the base units of kg, m and sec to get reminded.

    What is a newton - we know it is a force and as F=ma a N must be kg.m/sec^2
    What is a joule - it is work so it has to be force x distance which is Nm. So 1 joule = 1 Nm
    What is a watt - it is power so it has to be work/time which is joule/sec or Nm/sec So 1 watt = 1 joule/sec = 1 Nm/sec
    What is a pascal - it is pressure so it has to be force/area which is N/m^2 So 1 pascal = 1 N/m^2

    That is as simple as it gets. This consistency of the units reduces the chance of errors greatly.
    While the inferial system has such idiocies as "fluid-ounce" which is a measure of volume, not weight.

    Do not just think of the ISO metric system as being only a decimal system, it goes much further than that.
    For more on that, folks can visit my essay...

    A glimmer of hope
    ---
    Regards, Marv


    Home Shop Freeware
    http://www.myvirtualnetwork.com/mklotz

  15. The Following User Says Thank You to mklotz For This Useful Post:

    volodar (04-15-2019)

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •