"Wayne.B" wrote in message
...
On Thu, 22 Nov 2007 05:57:18 GMT, "Glenn \(s/v Seawing\)"
wrote:

Back to the transmissions; it seems that you've satisfied
yourself that you
are not significantly risking damage to them...yes?

According to the manufacturer and all of the so called
experts, we
should be OK. I like Jere Lull's sugggestion regarding
feathering
props but I suspect there is a considerable expense to
doing that,
plus some increased complexity risk.

Since the GB42 probably has smaller props, it might also
be easier to
implement one of the jerry rigged solutions for preventing
shaft

rotation.

Do you have room to install a collar, with a small disc for
a cable actuated caliper of some sort. Like a bicycle
brake, only larger.


SBV

On Thu, 22 Nov 2007 21:34:48 -0500, "Scotty" wrote:

Do you have room to install a collar, with a small disc for
a cable actuated caliper of some sort. Like a bicycle
brake, only larger.

The collar would probably be easy although there is nothing available
off the shelf that I'm aware of. The difficult part would be creating
a secure attachment point for the caliper. Given the forces involved,
the caliper itself would need to be hydraulically actuated like a disc
brake.

"Wayne.B" wrote in message
...
On Thu, 22 Nov 2007 21:34:48 -0500, "Scotty"
wrote:

Do you have room to install a collar, with a small disc
for
a cable actuated caliper of some sort. Like a bicycle
brake, only larger.

The collar would probably be easy although there is
nothing available
off the shelf that I'm aware of. The difficult part would
be creating
a secure attachment point for the caliper. Given the
forces involved,
the caliper itself would need to be hydraulically actuated
like a disc
brake.

Something like a handbrake on a forktruck would work.

On 2007-11-22 22:32:03 -0500, Wayne.B said:

On Thu, 22 Nov 2007 21:34:48 -0500, "Scotty" wrote:

Do you have room to install a collar, with a small disc for a cable
actuated caliper of some sort. Like a bicycle brake, only larger.

The collar would probably be easy although there is nothing available
off the shelf that I'm aware of. The difficult part would be creating
a secure attachment point for the caliper. Given the forces involved,
the caliper itself would need to be hydraulically actuated like a disc
brake.

Motorcycle disk brake might be most adaptable.

I'd feel safer if the brake disengaged if the engine powered up or
something's going to break some time.

Quick thought: airplane "parking" brakes and mid-80s Subaru clutches
hold pressure until the brake (or clutch) is depressed. Perhaps the
transmission's hydraulic pressure could be tied in.

Feathering prop is probably simpler, easier and cheaper in the long
run, and it's proven technology.

--
Jere Lull
Tanzer 28 #4 out of Tolchester, MD
Xan's pages: http://web.mac.com/jerelull/iWeb/Xan/
Our BVI trips & tips: http://homepage.mac.com/jerelull/BVI/

Jere Lull wrote:
On 2007-11-22 22:32:03 -0500, Wayne.B
said:

On Thu, 22 Nov 2007 21:34:48 -0500, "Scotty" wrote:

Do you have room to install a collar, with a small disc for a cable
actuated caliper of some sort. Like a bicycle brake, only larger.

The collar would probably be easy although there is nothing available
off the shelf that I'm aware of. The difficult part would be creating
a secure attachment point for the caliper. Given the forces involved,
the caliper itself would need to be hydraulically actuated like a disc
brake.

Motorcycle disk brake might be most adaptable.

I'd feel safer if the brake disengaged if the engine powered up or
something's going to break some time.

Quick thought: airplane "parking" brakes and mid-80s Subaru clutches
hold pressure until the brake (or clutch) is depressed. Perhaps the
transmission's hydraulic pressure could be tied in.

Feathering prop is probably simpler, easier and cheaper in the long run,
and it's proven technology.



Live steeeem here, dead steeeem there.