[PSUBS-MAILIST] Fw: Thruster position

[hank pronk via Personal_Submersibles]

Tim,My idea was to mount one vertical thruster pointing up and one pointing down because the props are only efficient in one direction.  This way I get full power from one and half power from the second in both directions.   Tilting them may get weird, but I can easily change things over time.Hank 


    On Wednesday, December 2, 2015 8:22 PM, T Novak via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
 

 <!--#yiv0587097532 _filtered #yiv0587097532 {font-family:Helvetica;panose-1:2 11 6 4 2 2 2 2 2 4;} _filtered #yiv0587097532 {font-family:"Cambria Math";panose-1:2 4 5 3 5 4 6 3 2 4;} _filtered #yiv0587097532 {font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;}#yiv0587097532 #yiv0587097532 p.yiv0587097532MsoNormal, #yiv0587097532 li.yiv0587097532MsoNormal, #yiv0587097532 div.yiv0587097532MsoNormal {margin:0cm;margin-bottom:.0001pt;font-size:12.0pt;font-family:"Times New Roman", serif;}#yiv0587097532 a:link, #yiv0587097532 span.yiv0587097532MsoHyperlink {color:blue;text-decoration:underline;}#yiv0587097532 a:visited, #yiv0587097532 span.yiv0587097532MsoHyperlinkFollowed {color:purple;text-decoration:underline;}#yiv0587097532 span.yiv0587097532EmailStyle17 {font-family:"Calibri", sans-serif;color:#1F497D;}#yiv0587097532 .yiv0587097532MsoChpDefault {font-size:10.0pt;} _filtered #yiv0587097532 {margin:72.0pt 72.0pt 72.0pt 72.0pt;}#yiv0587097532 div.yiv0587097532WordSection1 {}-->Hank,  Why not cant your vertical thrusters 45 degrees out from the vertical?  Sort of like this bow on view:  /O\   where the / and the \ represent the thrusters canted 45 degrees out from the O which represents the pressure hull.  This would allow the down wash to miss the horizontal thrusters while both "vertical" thrusters are heaving the sub upwards.  And it would provide controlled translate (sidle) movement when the two "vertical" thrusters are powered  to thrust one up and one down.  Your ballast block will keep the sub from rolling and force it to translate sideways.  This works very well for the DW2000's.Tim  From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of hank pronk via Personal_Submersibles
Sent: December-02-15 11:11 AM
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Fw:  Alec,I was hoping the wash would go around the motor, I have no experience with this, but it makes sense. :-(  I will move it back.  My original plan was to have them up front vectored 45 degrees, but they are very heavy, over 40 lbs each and that takes away from the buoyancy for the arm.Hank    On Wednesday, December 2, 2015 12:04 PM, Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  If it were me, I'd move it just a little bit aft, just enough to leave the vertical one unrestricted. I don't think you'll have any trouble at all rotating the boat if the thrusters are not exactly in the middle.  Best,
Alec  On Wed, Dec 2, 2015 at 1:57 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
Hi All,This is a picture of my proposed thruster location, I am not sure if the motor in this location will interfere with the prop wash from the vertical thruster inside the can above the thruster.
What do you guys think?  I want the motor as mid ship as possible for best steering.  This location is also good for cabling to the pen plate   HankOn Wednesday, December 2, 2015 11:51 AM, xxx xxxxx <mp13 at live.ca> wrote:    
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