Percrime wrote:Captain Nemo.... according to some reports. Straight fission reactor with carbon moderators and seawater cooling. Strangely he never sussed out how to separate oxygen from seawater. Other reports say that the Nautilus was a pure electric submarine and what Nemo had was a method of generating electrolyte on the fly from seawater. This is the more generally believed explanation.
Madrider wrote:I don't believe gear changing mechanisms were invented until possibly the 30's or even later, I do stand to be corrected on this point.
Most bikes would have been single speeds and I do recall that even Tdf riders up to the 30's were only riding single speeds
Changing gears up to this point was mainly by way of 'flip-flop' rear wheels where each side had a different size cog (probably fixed) and changing ratio meant taking out the rear wheels and turning or 'flipping' it over
I believe in the early 1900's they may have had freewheels but in the example of the movie it may have been a little 'poetic licence' to be using a freewheel
FYI: Tulio Campagnolo was one of the early developers of gear changing mechanisms but they were often crude afairs involving simple levers mounted on the seat stay to force the chain onto aonther cog/ratio. Some required 'back peddling' to change gears
Hitchy wrote:Percrime wrote:Captain Nemo.... according to some reports. Straight fission reactor with carbon moderators and seawater cooling. Strangely he never sussed out how to separate oxygen from seawater. Other reports say that the Nautilus was a pure electric submarine and what Nemo had was a method of generating electrolyte on the fly from seawater. This is the more generally believed explanation.
....sadly, he didn't invent the flux capacitor as well, thereby enabling his sub to travel through time.....assuming he could get it up to 88mph & generate the 1.21 giggawatts required
You're pretty right there. Gears as already noted go way back, even before the bike. Carbon fibre as we recognise it dates back to at least the 1970s, possibly earlier. The basic fibre/resin composites technology goes back even further. Di2 isn't new either - Mavic had an electronic shifting system back in the early 1990s. All of which is derived from that time when Ben Franklin flew a kite in a thunderstorm to harness electricity.Marx wrote:Hmm, I don’t know of any truly new development since the start of the last century. It’s just been a lot of tweaking on old ideas from the turn of the last century.
(for example: Carbon fibre is just papier-mâché with different materials, & wireless WiFi/Bluetooth/NextG is just Morse code via walkie talkies.)
Oh yes, a learnered response right here. You don’t get this sort of enlightened, plain & direct facts in your silly GoogleWiki....
JAC wrote:William Van Aden obtained a patent on a freewheel in 1869, and there were commercial bikes with freewheels from 1898. But I don't know whether they had made it to Woodend by 1901.
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