Re: [PSUBS-MAILIST] Dive Plane Mechanical Linkages

I meant "foot pedals" in the reference to "rudders" below.

Brian,

If I recall, you are the one building something similar to Deep Flight. In that case, the differential control surfaces you describe are just the ticket if you are going to "fly" underwater and want that kind of maneuverability. You have your rudders controlling motion about the longitudinal axis of the boat where an aircraft uses them for the vertical axis. Im going for lateral axis control only from the dive planes.

In my case, I won't need to bank at all, small course corrections with a conventional rudder because of my speed and underwater profile should be quite sufficient. I am after the same control profile as those old fleet type subs.

I guess what I'm really asking is about installation and maintenance practicality. Which system would create less and smaller holes in the crew compartment and be easier to deal with?

Thanks

Joe

From: "Brian Cox" <ojaivalleybeefarm@dslextreme.com>
Reply-To: personal_submersibles@psubs.org
To: <personal_submersibles@psubs.org>
Subject: Re: [PSUBS-MAILIST] Dive Plane Mechanical Linkages
Date: Thu, 1 Dec 2005 09:52:36 -0800

Joe,

I'm using the same type of system on my sub, I have a sitck and rudder arrangement like on an airplane. I have foot pedals that contol opposing side " ailerons" which turn in the opposite directions for banked turns. The stick controls the rear rudder, which is a side to side motion on the stick, and for accending or decending the stick is pushed forward ( for down) and back ( for up ). This is what I have been working on for the last few weeks on my to scale mock up. Everything is pretty straight forward linkage, however the side to side motion on the stick, for rudder control are miter gears so I can change that motion perpendicularly. An on one of the foot pedals I needed to use two meshing gears to reverse the motion with a counter shaft, so I could get a better angle (leverage) on the pedal. All these motions are turning thru hull shafts in a rotating manner.

Regards

Brian

----- Original Message -----

From: Joseph Perkel

To: personal_submersibles@psubs.org

Sent: Thursday, December 01, 2005 08:43

Subject: [PSUBS-MAILIST] Dive Plane Mechanical Linkages

Since my boat as designed is primarily a snorkel boat on the tiny diesel, dynamic flow over dive planes is critical to control.

I have in mind a mechanical linkage system similar to aircraft control surfaces with either a bell crank and pulley system or better yet a pushrod and torque tube system.

Individual control of the bow and stern planes as in the WWII boats is not really practical, so I am planning on an interconnection via either a single lever or a side mounted wheel. Very simple stuff, no hydraulics or electric motors.

I welcome comments and suggestions as every time I put something out, my design is improved tremendously as a result of the input.

Thanks

Joe

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