On 12 Aug, Philip <joyphil@xxxxxxxxxxx> wrote: > You do not seem to have any objection to a satellite obtaining energy > from the moon and or other planets in their use of the so called > slingshot manouvres, yet you have a problem with one obtaining it from a > rotating universal mass in another model, for no valid scientific reason > other than that of your bias towards your preferred model. No. It's a matter of the DIRECTION of the force. Perhaps you could explain the direction of the force acording your theory? Alan