On Nov 26, 1:05*pm, Bob Kuykendall wrote:
On Nov 26, 8:32*am, Andy wrote:

Why would anyone ruin a great hydraulic disc brake by actuating the
master cylinder with a bicycle cable?

When I was building a brake system for the center stick controls of my
HP-18, I decided I wanted the stick to have as little inertia, and as
little mass aft of the ptich pivot, as practical. Hence my decision to
use a mountain bike brake lever on the stick driving a fixed master
cylinder through a low-friction sheathed cable. That's why this
sailplane developer developed such a system.

My caution was driven by an earlier accident involving a late
acquaintenance whose sailplane unzipped in turbulence and distributed
parts pretty widely. That ship's control stick had been modified in a
way that some thought contributed to undamped PIO.

Thanks, Bob K.

Even better is to use a direct linkage from the spoiler
and keep this buggery off the stick completely !
See ya, Dave "YO electric"

PS: I know, doesn't work on the HP-18, no spoilers;
my whale has it on the stick...