[StACase]

The desired outcome is a 62,000-mile (99,779 km) tether...and to have solar-powered lifters carry 100 tonnes of cargo into space once a week, 50 times a year.

Which works out to about 740 miles per hour for the weekly round trip.

[dangus]

Only 370. You don't need to wait for the return basket to send the next one up. In fact, it helps reduce weight if it works like a dumb waiter.