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Chicken or Egg (Canned Food or Ships Propeller)
Posted: Mon Jul 02, 2018 9:39 am
by poultry_admin
Which came first?
Canned Food or a Ships Propeller?
(No Google!)
Re: Chicken or Egg (Canned Food or Ships Propeller)
Posted: Sat Jul 07, 2018 9:22 pm
by poultry_admin
Ships propeller: 1775
Canned food: 1810
Re: Chicken or Egg (Canned Food or Ships Propeller)
Posted: Sun Jul 08, 2018 5:07 pm
by poultry_admin
So, I got some push back that the propeller was invented 1827 and therefore AFTER canned food. Mainly because of this:
But I am confirming my number 1775 none the less. Russel did the first commercial application of it. The blades look like the ones we are used to seeing now. Brass is still a common material to be used for them. And I am sure (although I have not confirmed it) he also got a patent on it. All is great, but the same article in wiki uses another example as an earlier propeller. In 1775 David Bushnell and Isaac Doolittle built the "American Turtle", the first submarine used in combat. It was meant to apply explosives to the hull of British Ships in harbor. While a failure from a military standpoint (0 ships sunk), the replicas and sketches depicting the "Turtle" show either an Archimedes type screw
or a propeller
- turtle2.jpg (9.02 KiB) Viewed 16642 times
Either way, the thing is spinning under water pushing the boat forward by doing so. Thus close enough to be a propeller. Not the best design and horribly inefficient, but a propeller none the less.
If you want to read up about it yourself:
https://en.wikipedia.org/wiki/Propeller
https://www.scientificamerican.com/arti ... ropellers/
http://www.irvineburnsclub.org/irvine/propeller.htm
Images: wiki screen shot,
https://www.militaryfactory.com/ships/i ... turtle.jpg and
https://encrypted-tbn0.gstatic.com/imag ... KqK-0hsYPA
