On 5/8/2019 7:54 AM, Peter Fairbrother wrote:
On 08/05/2019 06:07, Troy Prideaux wrote:
Not much mention on how they deal with aero drag.
"We should be able to extract some of the potential energy of the column of air above us falling down [??] as we pass through it falling up, again using Newton's law of equal and opposite action"