[PSUBS-MAILIST] hydraulics

[Alan]

Thanks Hank,
The working end of the bike brakes I've seen probably wouldn't be much use & couldn't
be adapted. There may be some other small hydraulic manual system that could be pressure
compensated out there. Will have a google some time.
Alan

Sent from my iPad

On 19/09/2013, at 9:34 PM, hank pronk <hanker_20032000 at yahoo.ca> wrote:

> Hi Alan,
> After some more thought, I have changed my mind about bicycle brakes.  The problem is the caliper has a rather large piston area.  This gives you better brake force, but it would hurt you when you put water pressure against it.  You want a small piston like a hydraulic clutch in a car.  I would use the clutch parts because they would also be aluminum and much tougher.  You would need to remove the piston and machine an o-ring  glove because the normal seal is designed to push in one direction only.
> Hank
> From: hank pronk <hanker_20032000 at yahoo.ca>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
> Sent: Thursday, September 19, 2013 4:21:36 AM
> Subject: Re: [PSUBS-MAILIST] hydraulics
> 
> H Alan,
> Bicycle brakes would probably work quite well because they are made from very good material. 
> Hank
> 
> From: Alan <alanlindsayjames at yahoo.com>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
> Sent: Wednesday, September 18, 2013 11:55:49 PM
> Subject: Re: [PSUBS-MAILIST] hydraulics
> 
> Hi Brian,
> I've wondered about this also.
> I was looking at the hydraulic brakes they have on bicycles now days &
> wondering if you could adapt them for functions like releasing emergency
> bouys or similar.  The manual hydraulics they have on boats, like steering units
> are pretty expensive. Would be good to find something of suitable material
> off the shelf hat could be used.
> Alan
> .
> Sent from my iPad
> 
> On 16/09/2013, at 5:28 AM, "brian" <brian at ojaivalleybeefarm.com> wrote:
> 
> > I wonder if those human powered hydraulics could have an application for our boats, like the cats in the America's cup.
> > 
> > Brian
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