Time since introduction of the first mass-produced helicopter (Sikorsky R-4)

Time since introduction of the first mass-produced helicopter (Sikorsky R-4) (77 y)

/fact/time-since-introduction-of-the-first-mass-produced-helicopter-sikorsky-r-4

Link

Neat Ratios ...

Time since introduction of the first mass-produced helicopter (Sikorsky R-4) (77 y)

  • is 1/25 of Time since start of building of the Colosseum (1,947 y)...more
  • is 1/25 of Time since the peak of Roman Empire (1,900 y)...more
  • is 1/10 of Time since the birth of Marco Polo (767 y)...more
  • is 1/10 of Time since the birth of Dante Alighieri (756 y)...more
  • is 1/5 of Time since the birth of Newton (378 y)...more
  • is 1/4 of Time since the birth of Euler (313 y)...more
  • is 2/5 of Time since the first passenger steam railway service (196 y)...more
  • is 2/5 of Lifespan of Galapagos giant tortoise (190 y)...more
  • is 1/2 of Time since the publication of Volume 1 of Marx's Das Kapital (154 y)...more
  • is 1/2 of Time since the birth of physicist Marie Curie (154 y)...more

If this was a standard unit ...

Read all about it!

Is That a Big Number? - the book - is now available from all good booksellers.

"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine

Click here to learn more about it.

Click here for Podcast: Andrew Elliott interviewed for New Books Network.

http://itabn.tumblr.com/post/138631317782/this-website