Big catfish – Hookes Law

This topic has 5 replies, 6 voices, and was last updated 15 years, 6 months ago by TF_justin case.

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- 06/12/2010 at 12:57 pm #43425
  greybeard
  Participant
  Talking to Bill Dunthorne (owner of Brentwood Angling and Par Fishery). Cats in Par are getting very big, The 60lb scales the carp boys carry are not capable of weighing these monsters.
  With 2x60lb scales I’m sure that a weight could be achieved (up to 120lb) with the scales spread apart on a long beam set-up, but we wondered if you weighed the fish with the scales one above the other could you get both dials to give a reading within their scale range or would the top scale bottom out?
  Amazing how the mind wanders when you cant get your fishing fix!!
- 06/12/2010 at 1:10 pm #124526
  TF_orexina
  Try it out with something weighing less than 60lb. In theory it should weigh half on each set, so add the 2 together to get the true weight. As you only have a 60lb scale weigh the object on one only to see how much it weighs.
  The trouble is, is the spring only doing 60lb thus they would both bottom out.
  
  Lets all know as we won’t be able to sleep at night!!! ~clap ~think
- 06/12/2010 at 3:24 pm #124540
  TF_Team Rattler
  I thought hookes law was relative to springs that had gone beyond their elastic limit?
  The scales in tandem wouldn’t work as you’re only adding the weight of a set of scales to the already excessive weight that you are struggling with.
  Not really sure how the scales in parallell would work (long time since school) but uneven weight distribution would cause problems and you would end up with two potential movable fulcrums.
  Someone out there must know the answer?
- 06/12/2010 at 5:16 pm #124557
  TF_proper tidal boy
  bigger scale s might help im sure reubens do a 120lb set
- 06/12/2010 at 7:07 pm #124578
  TF_wiggley worm
  if a spring in one set of scales stretches 50mm weighing 50lb two sets of scales with the same spring set in tandem the stretch of both springs will be 25mm each = 50mm = 50lb
- 07/12/2010 at 7:48 am #124652
  TF_justin case
  If you did it in parallel it would work but in series you would have to deduct the weight of the scales themselves
  
  the way to go would be two sets of scales 1 long bar with the weigh sling attached to it
  
  a lot of faffing about when scales that do the job are readily available
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