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"Txemi Jendrix" <tji### [at] euskalnet net> wrote in message
news:3e2a2d3b@news.povray.org...
Nice design and colors. The front needs a lot more detail, but I'm sure
you've got that planned already.
-Shay
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"Txemi Jendrix" <tji### [at] euskalnetnet> wrote
> Still a lot of work to do woth the boat
> but as it is a WIP ;-)
What's the gear ratio? To me, it looks impossible to operate at a
comfortable RPM, especially if you start from rest.
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3e2c7cc0@news.povray.org...
> What's the gear ratio? To me, it looks impossible to operate at a
> comfortable RPM, especially if you start from rest.
From www.museoscienza.org\english\leonardo\barca.htm
"Leonardo envisaged the driving paddle wheels of a boat being about 90 cm
long. The wheels intended to magnify the oarsmen's strength were designed as
being about 60 cm in diameter, and fitted with 16 cogs that engaged with a
sprocket wheel of about 15 cm in diameter fitted with 12 cogs. According to
Leonardo's calculations - leaving aside all mechanical and nautical
difficulties -, with a driving wheel making 50 rpm the boat would have
sailed at 50 miles per hour."
Hope this helps ;-)
PS: It's obvious that Leonardo was an optimist.
Bye
Txemi Jendrix
http://www.txemijendrix.com
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> Nice design and colors. The front needs a lot more detail, but I'm sure
> you've got that planned already.
Thanks, and yes, you are right, I'm working on it.
Bye
Txemi Jendrix
http://www.txemijendrix.com
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3e2c883e@news.povray.org...
> Leonardo's calculations - leaving aside all mechanical and nautical
> difficulties -, with a driving wheel making 50 rpm the boat would have
> sailed at 50 miles per hour."
>
> PS: It's obvious that Leonardo was an optimist.
> Bye
Lol he was indeed :)
mmm let's see if we can let aside some others little but ennoying
difficulties: eeeeeeer gravity? time arrow? light speed limit?
Leonardo, come back we need your help!!!!
Marc
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