Originally Posted by
asgelle
If you know what Fr is, you should know what the value is here, and why it's irrelevant to the case at hand.
Really. Let the trailing "canoe" be huge and dragging an anchor. If Fr<1 (just like M<1 which I presume you are getting at) then the nature of the flow is elliptic in nature. Hence a trailing object can have an effect on the leading object.