Comments by "starventure" (@starventure) on "Construction begins on high speed rail line in Las Vegas" video.
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@Jack-ke5uv I would like to point out that one advantage that aircraft possess that trains do not is scaling of performance. Suppose you have a train running the route, and it is in the early evening. Not much ridership, not much cargo, etc. It is somewhat quiet for revenue. The fuel requirements for the run however, are no different than the full trips. This is because in comparison to the overall train basic operating weight, passenger weight and cargo weight is irrelevant. Yes, it is possible to improve performance by dropping off an unneeded car or two, but those cars are going to be needed for operations in the morning at the destination. So shedding weight is not in the cards. An aircraft however, is just a single cabin. It cannot be split up, but equipment substitution may be possible. Furthermore, the lighter an aircraft is, the less fuel it requires to operate. This means that the reduced revenue from that early evening load can actually be compensated for by using less fuel, which compounds into a trip that might be otherwise unprofitable being able to break even or better. With electric aircraft on the close horizon in the next few years, this metric will increase to the point that new air services that would otherwise be relegated to essential air service domain will be become viable for airlines to serve, which will place even more competitive strain on future rail services.
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