4 ms·
Couple of comments: 1) What is the size of the pipes you are considering? Will it be big enough for humans to get into for maintenance - I was thinking what wo
by dgarud 8y ago
Couple of comments:
1) What is the size of the pipes you are considering? Will it be big enough for humans to get into for maintenance - I was thinking what would happen if a delivery vehicle breaks down or a small animal gets into a tunnel.
2) Have you considered small blimps as delivery vehicles? The technology has got considerably better and should be less noisy than drones.
- deleted 8y ago[deleted]
- tuberelay 8y ago1) 700mm diameter - broken down vehicles should be shuntable, but a person could get in there reasonably easily. 2) helium blimps lift 1 gram per litre of helium, so to lift 10kg of groceries they would need a 10 cubic meter blimp or a 2.7 meter diameter sphere - seems big and difficult to control especially in winds.
- S4M 8y agoA person could get in a pipe of 700mm diameter? I seriously doubt it.
- lgregg 8y agoIt's a tight fit but works. I would have to put one arm forward and one arm back to shift my shoulders for a torpedo tube (approx 21in or 533mm depending on nation). 700mm is another 6 inches. The average male's shoulder width is about 18 and go wide as 24 inches (often hard core weight lifters). https://www.google.com/search?q=person+in+a+torpedo+tube&tbm=isch https://www.google.com/search?q=person+in+a+torpedo+tube&tbm...