Join Date: Feb 2006
Location: Driving the pace in the crosswind
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Though this does not appear to be an optimum TT position, he will not create too much of an air pocket because none of the air is being trapped against his abdomen, chest, elbow or thighs. He is SO wide open that it isnt a pocket so much as a wall.
My knowledge of aerodynamics says that the elbows do not have to be as close together as possible - only about thigh width. If your elbows are more narrow then that, it restricts breathing, but does little for Aero position as even if the air does not hit your arms, it still contacts the thigh. However, if your forearm directs the air around the thigh (via a slightly wider elbow), you can both breathe better and not suffer aero penalty.