[PSUBS-MAILIST] U joint prop

[hank pronk via Personal_Submersibles]

Brian,
If your motors are in cans, can't you turn the can?
Hank
--------------------------------------------
On Mon, 12/8/14, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] U joint prop
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Monday, December 8, 2014, 10:03 AM
 
 That's probably the reason I've never
 seen one.  I'm hoping that with two props I'll be able
 to turn by just running one prop or the other.  
 
 Brian
 
 --- personal_submersibles at psubs.org
 wrote:
 
 From: Marc de Piolenc via Personal_Submersibles <personal_submersibles at psubs.org>
 To: personal_submersibles at psubs.org
 Subject: Re: [PSUBS-MAILIST] U joint prop
 Date: Mon, 08 Dec 2014 10:11:37 +0800
 
 One U-joint causes a 1/rev vibration which can be quite
 severe. To get 
 smooth action, you need a pair of U-joints, and the input
 and output 
 shafts need to be parallel.
 
 That, or you need to substitute a constant-velocity joint
 for the U-joint.
 
 Marc
 
 On 12/8/2014 9:11 AM, Brian Cox via Personal_Submersibles
 wrote:
 >      Has anyone ever had any experience
 or seen a propeller that can
 > change orientation using a U joint at the end of the
 propeller shaft?
 > If could just get 15 degrees or so I might be able to
 eliminate my
 > rudder assembly altogether.
 > Brian
 >
 >
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 >
 
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