"Chet" fired this volley in
et:

I knocked together a quickie version of the modifications suggested
for Lloyd's sock-type actuator.

BTW, Chet,

The sock-type actuator doesn't have any force advantage over a
diaphram type. The advantage is its essentially unlimited length of
stroke.

Unlike a diaphram type, the throw of which usually cannot be more than
an inch or so in practical versions, you could make a sock-type
actuator with a two or three foot stroke just as easily as one with a
1" stroke.

That can help your avoiding cludging up stroke-amplifying (and force
dividing) bell-cranks and other such devices to get the stroke of the
cylinder to match the throw of your throttle linkage.

LLoyd