With considerable difficulty. You need to cut the tubes for the frame, miter the ends and then weld/braze them together. Then there are all the fittings. Saddle post clamp, dropouts, bottom bracket.
Then wheels, bars, saddle, gears, pedals etc etc.
To build a complete set for 24 bicycles, you would need 96 bicycle wheels.
He never did. The drawings from Leonardo da Vinci which supposedly were of a bicycle has later turned out to be faked.
Do a net search for "bicycle frame builder" + your area code. Expect to pay a fair bit for it.
There are several DIY recumbent bicycle plans available online that you can use to build your own recumbent bicycle at home. Some popular options include the Atomic Zombie Warrior Recumbent Trike, the Easy Racers Gold Rush Replica, and the Cruzbike Vendetta. These plans typically include detailed instructions and materials lists to help you build your own custom recumbent bicycle.
If the rubber is rigid enough, I believe it is possible.
Well, they can't be built out of dreams and wishful thinking.
Bicycle Making~APEX
Becacuse it's hard to build stuff out of liquids and gasses.
Do a net search for "amphibious bicycle" and you'll see plenty. Fairly easy to build, very hard to make them practical.
Wood has been used to build a bicycle in the past. Though metal tubing, composite carbon fibre, and plastics are usually used nowadays.
No 'truing' is not a programming language. It is an activity by means of which you align/build a bicycle wheel.
No. Someone tried to build a fun, human-powered vehicle and came up with the bike.