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Old 01-13-2013, 04:12 PM   #500
Bionic Poster
Join Date: Oct 2005
Posts: 34,180

Originally Posted by Povl Carstensen View Post

That is not possible to see exactly when filmed from behind.

No, you can impart momentum, thrust, power without being perpendicular. On the other hand being unperpendicular is a major factor in generating spin, both vertical and horisontal. Imo. And unperpendicularity to the target direction is nescessary to compensate for the incomming balls direction.

Edit: Sorry, I see this has since been discussed in
Yes we discussed the square vs slightly closed face in depth already
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