Q′ M′
of the engaging pallet when unlocked stands at a greater angle to
E B
than it did when locked, while the opposite is the case on the disengaging pallet, in which the angle
S′ N′ F
is much less than
S N F
. This shows that the deeper the engaging pallet locks, the lighter will the draw be, while the opposite holds good with the disengaging pallet; also, that the draw increases during the unlocking of the engaging, and decreases during the unlocking of the disengaging pallet. These points show that the draw should be measured with the fork standing against the bank; not when the locking corner of the pallet stands on the primitive circle, as is so often done. The recoil of the wheel (which determines the draw), is illustrated by the difference between the locking circle
M N
and the face