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ah but that analogy is flawed...of course the pump would flow through the 100mm connector, because the reservoir in the pump is at higher pressure than the current tyre pressure (differential) and the one way valve that stops it reversing. AND IF THE 100mm CONNECTOR WAS LONGER IT WOULD JUST TAKE LONGER (LIKE PUMPING UP A TRUCK TYRE WITH A SMALL PUMP.
looks more like the 'D' port heads and header pipes used on Superbikes (ZX7R etc) to narrow and more evenly flow 'VECTORS' in the exhaust cross section
AROUND THE TIGHTEST BEND....
put your finger tips on one hand on corresponding hand's tips to form an 'O' with your thumbs BETWEEN HANDS - now push your thumbs up so the 'O' opening becomes more sausage shaped - thus the flow in the sausage cross section is more even than the flow in the centre of the 'O' and the outside of the 'O'
see Mircon Serpent header pipes - some other pipes such as Akrapovic, Moriwaki have 'D' welded in the pipe (that matches the port in the head)
"YOU CANT BLOW A NOTE ON A TRUMPET WITHOUT LIPS"
^^^ but lips are like a restriction/orifice
you homework tonight is to press the head of your P3nis firmly against a small empty soda bottle opening - how much do you think will flow - very little - your bladder is only
relaxing (not exerting pressure) and the pressure soon builds (air in a decreasing volume space) inside the bottle that will overcome the pressure inside your body - its hilarious - you have completely relaxed your full bladder and the flow just stops
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neck size of the bottle may vary between individuals