[HungryBear]

Confusion:

We’re given an education in the Rotational "Wrist Conditions" at 4-C-0. HK identifies "Rotation" as “Hand Motion”.

4-C-0 clearly indicated that the Hand (Wrist) rotates, but in 2-G Hinge Motion, HK says that ““Roll” is actually imparted by the turning torso and/or the orbiting Arms per 2-K#4 and 2-K#5 as described in 10-18”.

Well, what is he talking about?

Do you Turn and Roll or Not???
Is Turning and Rolling done by the Torso and orbiting arms?
Is Homer mixing terms?

My opinion- HK was PRECISE with the exception of one part of 2-G. HINGE MOTION. "..... is a true rotation of the Hands into Impact alignments by Accumulator #3 with (10-18-A only)....."

I might suggest that it should say - is a true rotation of the Hands into Impact alignments by rolling the wedges with (10-18-A only).

This rolling of the wedges starts at the top-start down- and is completed BEFORE the hands enter the pully.
At this point enter turning and rolling by the orbiting arms- BUT there is NO rolling - this is the period of "sequential" ( another misunderstood word) release- "trogonometric" release would be appropriate.

Just my understanding and analysis of what HK wrote.

HB