[nuke99]

Also , its is written 7-3 that it is mandatory for swinging and hitting ,not only hands or shaft the right forearm must be driven or thrown into impact. He did not say for HITTING must be driven or swinging must be thrown. I guess it is a choice.

I also think, the way the right forearm is aligned for swinging, it pulls the left arm like a piece of string and support the secondary . That type of assembly allows for CF throwout. Adding a Drive in that assembly is perfectly acceptable, regardless of swinging or hitting , as explained by TT.

So we got 2 ways . and still being able to do a 4 Barrell swing since the right is actively driving . Though Homer used to say there is no 4 barrel swing.. BUT IMHO, at that context of time he feel he need to explain that way or think there isn't one.

FOR a HIT, the left arm is a wall, and the right forearm is actively driving via primary assembly , there is less CF throwout. Notice i say less.

Because Anyhow, the left can only pull, the right can only push. Pull causes throwout, push is drive.

Let me know what you think, Thank you