[PSUBS-MAILIST] Deep Flight Dragon

[Alan James via Personal_Submersibles]

Alec,I think you are on to it with the spoilers function being to counteractthe positive buoyancy. It would save using the 4 vertical thrusters,but would only work at speed.If you look at the sub side on, the profile at the front would cause itto nose dive & that would be accentuated by the rear thrusters drivingit down. So the rear spoiler would counter that.Maybe the spoiler could be an add on for David Columbo who has a similar design.Cheers Alan
      From: Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Friday, November 20, 2015 2:39 AM
 Subject: Re: [PSUBS-MAILIST] Deep Flight Dragon
   
I have to say one thing I wonder about is the function of that rear spoiler. It certainly makes the vessel look more like a race car, but can anyone think whether it actually serves a purpose? All I can think is that because she's got positive buoyancy, the spoiler forces the boat under when there's forward motion. It doesn't look like the spoiler pivots, and it would seem cumbersome to make the down-force a function of forward velocity. 
Best,
Alec
On Wed, Nov 18, 2015 at 10:58 PM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:



Hi Tim,yes it would be difficult to get in to that in anything other than a mill pond;& I wonder about the stability also; the way the bouyancy seems to be placed low down.From the videos I've seen it looks like the hatch can only be opened from the outside,could be wrong though.The large diameter thrusters look like they could be made from bike hub motors. Theyare the right voltage at 40V & are only 1500W. They are direct drive & getting their torqueby using large diameter narrow motors.There are some good photos of the fuselage & hull in the links on this page.He is not scared to think outside the box.Love a visit to his workshop. Would fly over for that :)http://www.deepflight.com/category/news/
Cheers Alan
   

   From: T Novak via Personal_Submersibles <personal_submersibles at psubs.org>
 To: 'Personal Submersibles General Discussion' <personal_submersibles at psubs.org> 
 Sent: Thursday, November 19, 2015 3:11 PM
 Subject: Re: [PSUBS-MAILIST] Deep Flight Dragon
   
Alan,Hawkes certainly knows how to design cool.  From underwater fighter jets to this underwater race car.  I noticed that there is no photo showing ingress/egress on the surface.  Personal submarines, in my humble opinion, really should have sufficient freeboard (often a conning tower) to allow the pilot to operate the vessel solo (without a launch crew and/or crane).  Maybe this one does, the Super Falcon does not.But is sure looks good enough to get the male youth off the jetski and into a submarine.  I know, jetskis are a whole lot cheaper than this boat.Tim  

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan James via Personal_Submersibles
Sent: November-17-15 10:12 PM
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: [PSUBS-MAILIST] Deep Flight Dragon  Here's a link to Hawke's new Deep Flight Dragon.Dragon - DeepFlight - Advanced Personal Submarines and Undersea Technology400ft depth capable with composite hull, a 40V system & brushless direct drivemotors (like I'm trying to make).Very similar in appearance to the 2 person sub Phil is involved with.There is a specifications link on the page.Alan
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