Re: [PSUBS-MAILIST] Hydraulic thrusters

[John Gaertner <jgaertner1@earthlink.net>]

Hi Dan,

Well I guess we will see... I just ordered my "test" 1 HP motor and pump and am going to bread board the system before coming to any final conclusions. (Once the system is up and running I am going to mount it underneath a small boat of mine for testing) But my submersible design is much like the Soucoupe, I have no propellers and they would probably not work in my case for the designed shape of the submersible. 

A 1 HP electric motor turning an efficient hydraulic pump can push a whole lot of water through two vectored thrust nozzles I have learned from my research and calculations. The noise problem, if it exists, can be solved through sound proofing the motor mount and motor housing. The hydraulics have the advantage of being easily throttle able and require only a small hull pass through as I have mentioned. 

Plus I am interested in the concept... But experimentation will tell. If it does not work at the bread board stage, then I have all the parts for a great log splitter!

John 



-----Original Message-----
From: "Dan H." <jmachine@adelphia.net>
Sent: Oct 24, 2005 8:59 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Hydraulic thrusters

John,

Is it really going to be that worth while to go with hydraulics?  You must 
be planning a really small system if your total power input is only one 
horsepower.  You have some power lost to heat in the hydraulic system also. 
Then you have the noise of the pump to listen to.  For a total of one 
horsepower, wouldn't it be much easier to just use electric motors in pods 
with a pump shaft seal?

Dan H.
----- Original Message ----- 




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