ET3

3 ms·

1.
by ET3 14y ago
I dont know about 'hyperloop' but ET3 (tm) tubes (if placed underground) require less than 1/15th as much earth removal than a train tunnel or freeway tunnel. Our patented (US 5,950,543 and others) ET3 system optimizes tube size to strike a
2.
by ET3 14y ago
To mince words, Musk used the word "tunnels" (and not "tubes"), perhaps intentionally?? Tunnels are know for leaking water (and air), while tubes (or pipelines) are implied to not leak. At any rate, the subject of Evacuated Tube Transport
3.
by ET3 14y ago
The drag of ships moving at less than hull speed (non planing) is a function of: skin friction (shearing of the boundary layer), wave making, and Reynolds number (related to the length of the ship, and the viscosity of the fluid). One inter
4.
by ET3 14y ago
The principal of "choked flow" limits flow velocity in a constant section tube to Mach one unless the pressure drop is much higher than 1 atm. The drag force at choked flow would be about 20 tons. Tests show drag in a tunnel with high blo
5.
by ET3 14y ago
Pressuring a system (depending on the pressure) would be more stress and risk than a vacuum. Depending on materials used (concrete for instance - that prefers to be loaded in compression), the vacuum can actually IMPROVE stability and safe
6.
by ET3 14y ago
You are correct that reasonable people do not fear what is safe. Phobia rules the minds of the irrational. Many refuse to fly in a commercial jet in spite of the fact it is 1/15th the risk of driving in a car the same distance. 1/3 of Ame
7.
by ET3 14y ago
Google "Evacuated Tube Transport" (ETT) or "Evacuated Tube Transport Technologies" (ET3) (trade marks of ET3 Global Alliance, and et3.com Inc.) on google and youtube -- watch the videos to learn of more advantages. Read the first US patent