[PSUBS-MAILIST] Kort Nozzle

[Jon Wallace]

Hi Joe,

There are a number of enhancements that have been discussed by members 
building K-350's.  We'd have to collect those and see what you were 
comfortable with committing to.  Scott Waters had a list of 
enhancements/changes that he recommended as part of his presentation in 
Islamorada.  He can probably communicate those or I can look them up 
from his slides.  James Frankland is another person whom had suggestions 
for vessel improvements.  I'll see if I can get a list together and then 
you can decide if you want to invest time in them.

In regards to the kort nozzle, I believe the design geometry required to 
produce the thrust enhancement that has been discussed in this thread 
will not survive a hand lapped FRP approach.  Like an airfoil, any 
deviation from the design will reduce efficiency. Enough deviation and 
you've spent a lot of time and money on nothing more than a glorified 
prop guard.  It would make sense to include as part of the kort project 
some means of testing the efficiency of the actual product so we could 
determine the effectiveness of various production methods.

Jon


On 10/27/2013 9:33 PM, Joe Perkel wrote:
> Jon,
>
> The short answer is I dont know. But look at that Dutchman and his 
> simplistic ingenuity. Thats what Im hoping for out of this group as 
> far as materials and processes. Im ready to draw up whatever the 
> result. Consider that there are intrepid builders of all sorts of 
> things worldwide. Hovercrafters build large scale ducts for thier 
> craft as a example. I'll take a look there tomorrow.
> How about half a kort??? A plug of some kind (/construction grade foam 
> perhaps/?) to build up a FRP shell over then mate two halves Revelle 
> model style??? Can this shape be hot wired?? What to use as a guide? I 
> have ideas and questions, but I need the shop wizards of the world to 
> come up with the process.
> As for The other things, Im ready and willing. I like the thruster 
> because with my family and work time constraints, its not too much to 
> chew on. I can commit to small projects for now, bigger later as time 
> goes on.
> What would you like to see done apart from the thrusters?
> Joe
>
>

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