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Author Topic: Submarines general  (Read 15302 times)

Crossie

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Re: Submarines general
« Reply #50 on: January 19, 2016, 05:10:20 PM »

 
   Ah yes, a hatch. The only reason it hasn't got one yet is because I cannot find anything to hand that I can convert into a passable example and being one of those 'impoverished modellers' that I mentioned in a recent sales thread, I'll only buy one as a last resort. Will probably finish making one out of some polyester filler or Milliputty , that's if it's still useable. Also needs a ship's bell and some railings around the gun deck - - -which looks not so much a Wintergarten - - -  more of a parade square! I'm making up some colourful insignia for the tower which I think are suitable.

                                                       Trevor
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essex2visuvesi

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Re: Submarines general
« Reply #51 on: January 19, 2016, 06:08:53 PM »

give me a "fag packet" sketch and I'll see what I can do on the old 3d printer
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Crossie

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Re: Submarines general
« Reply #52 on: January 19, 2016, 06:40:16 PM »


 Well essex I'm not sure how i can get a drawing on here, I never was able to get the hang of using Windows drawing progs. nor Sketchup, and I don't have a scanner to be able to send and olde worlde fag packet sketch, but all I need to make is a ...........circular, domed, hatch with maybe a wheel in the centre and a pair of hinges , around 30mm diameter and 10mm high, a bit like in this picture..................

https://www.bing.com/images/search?q=submarine+hatch&view=detailv2&qpvt=submarine+hatch&id=AAAC679D28E7C87A2672E9F116234E6D04F586EF&selectedIndex=6&ccid=FLZyim%2b1&simid=607991757356992319&thid=OIP.M14b6728a6fb5e71f3be205e1ead7bcaco0&ajaxhist=0

 wow that seems a long link! Doesn't need to be scale, this is a 'cartoon' sub after all %%

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Subculture

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Re: Submarines general
« Reply #53 on: January 19, 2016, 06:42:42 PM »

I don't use scanners much, just take a photo of your sketch with your digital cam/phone/web cam etc.

Crossie

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Re: Submarines general
« Reply #54 on: January 19, 2016, 06:49:12 PM »


 DOH!!!!!!!  :-)) Why didn't I think of that? Blame it on being out in the cold weather most of the afternoon  slowing down the grey matter! One sketch coming up after I've had a bite to eat,

                                      Trevor
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essex2visuvesi

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Re: Submarines general
« Reply #55 on: January 19, 2016, 07:30:14 PM »

OK Looks pretty straight forward


Let me know a rough hatch diamteter
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Crossie

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Re: Submarines general
« Reply #56 on: January 19, 2016, 07:35:33 PM »


 Taking up Sc's suggestion here's one shaky freehand, not to scale nor representing any particular submarine, sketch with some dimensions of roughly the sort of thing for this Springer sub- - - -or should that be Sub Springer? Very much similar to the picture in the earlier link,

             Trevor
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Hellboy Paul

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Re: Submarines general
« Reply #57 on: January 19, 2016, 09:25:18 PM »

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essex2visuvesi

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Re: Submarines general
« Reply #58 on: January 19, 2016, 11:27:47 PM »

Quick run off


less than an hour from start to finish



The handle detail is not great so it might be better to fabricate something from brass wire or something
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Klunk

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Re: Submarines general
« Reply #59 on: January 19, 2016, 11:49:45 PM »

You could use.....A contact lense......brass etch cross hairs and brass etch sprue for the hinges.
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essex2visuvesi

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Re: Submarines general
« Reply #60 on: January 19, 2016, 11:54:25 PM »

You could use.....A contact lense......brass etch cross hairs and brass etch sprue for the hinges.


Thats a Big eye with a 30mm contact lens
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Crossie

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Re: Submarines general
« Reply #61 on: January 20, 2016, 11:04:09 AM »


        Hmm, contact lens...........wouldn't that look a bit more like a jellyfish????????

     Making the handwheel is a simple soldering job, and SWMBO informs that I can get a wide selection of brass rings at her favourite haberdashery, or she might even have one suitable amongst her STUFF!

                           Trevor

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unbuiltnautilus

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Re: Submarines general
« Reply #62 on: January 20, 2016, 12:35:48 PM »

You know there is a Springer Tug in the Submarine section?

Now I am not one to complain, so I suggest that it is only fair that we encourage at least one custom Springer tug be built and inserted into every other themed section of Mayhem..I look forward to the Topsail Springer almost as much as the RNLI Springer and the Pre-Dreadnought Springer ( a personal favourite! ), but mostly its the Offshore Powerboat Springer with the 91 engine in that I want to see %)

Let the small square, but oddly curved Mayhem begin :-))
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Crossie

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Re: Submarines general
« Reply #63 on: January 20, 2016, 01:55:58 PM »


 You know unbuilt, if I didn't have so many unfinished projects lying around I'd be sorely tempted! Maybe just one more and I do so like the sound of a Dreadnought Springer, pre or otherwise? You never know what your suggestion might have sparked off amongst all the creative folk here?

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unbuiltnautilus

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Re: Submarines general
« Reply #64 on: January 20, 2016, 02:10:42 PM »

Always happy to light a spark...even if there is a keg of gunpowder about :}
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essex2visuvesi

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Re: Submarines general
« Reply #65 on: January 20, 2016, 04:56:53 PM »

Got me thinking....


Riva Springarama anyone?
Shovelnose springer perhaps?
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Norseman

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Re: Submarines general
« Reply #66 on: January 20, 2016, 06:15:19 PM »

Then we should really have a Martin themed Springer. It would take a spray painting master to do the high colour scheme. Is anyone capable of spraying whilst wearing heavily darkened glasses?

Anyway back to subs. Who on here has the biggest model sub and who the smallest?

Dave
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unbuiltnautilus

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Re: Submarines general
« Reply #67 on: January 20, 2016, 06:33:49 PM »

I have just finished converting one of these for the Royal Navy, honest...and it still works :-))
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Subculture

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Re: Submarines general
« Reply #68 on: January 20, 2016, 08:18:17 PM »

Is this the replacement for Nuclear deterrent?

Crossie

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Re: Submarines general
« Reply #69 on: January 20, 2016, 09:29:38 PM »

Then we should really have a Martin themed Springer. It would take a spray painting master to do the high colour scheme. Is anyone capable of spraying whilst wearing heavily darkened glasses?

Anyway back to subs. Who on here has the biggest model sub and who the smallest?

Dave


         This is the smallest that I have at 61cm x 4cm and 600gm submerged displacement, it's a dynamic dive machine and is currently a bit over-powered, does nice torque rolls!

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Re: Submarines general
« Reply #70 on: January 20, 2016, 09:31:55 PM »

Have you tried putting some post swirl stators in the nozzle to counter the torque? Make them from copper or brass so that you can tweak the angle of attack.

Crossie

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Re: Submarines general
« Reply #71 on: January 20, 2016, 09:58:14 PM »


 No, I haven't tried that, a good idea thanks. First though is to run it on a more appropriate  2s pack instead of the 3s that just happens to be laying around unused, the motor is the smallest that I had in my box of bits it's a 120w (max!)  2212 turning a trimmed down 1" 3 blade plastic, but yes I'll fit a couple of small vanes soon and let you know the result.
Like all of my current builds, I try to use up stuff that I already have after decades of acquiring ever more bits'n pieces before buying any more.
                                              Trevor

                                                               
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Crossie

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Re: Submarines general
« Reply #72 on: January 20, 2016, 10:23:42 PM »


 Sorry about the rubbish picture, I reduced it TOO much!

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Subculture

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Re: Submarines general
« Reply #73 on: January 21, 2016, 08:04:56 AM »

You can also try a shallower pitch prop. Most commercial props tend to be a a bit high in pitch for single screw submarines, especially if the prop size is fairly large and you're running a lot of power. Ideal pitch range seems to be about 0.7x to 1x the diameter.

With twin screws you can select what pitch you like.

Crossie

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Re: Submarines general
« Reply #74 on: January 21, 2016, 10:41:00 AM »


 Yes, I can cut the blade width down a bit more, though most likely will eventually make a brass prop with much finer pitch.

  Twin props does make life easier for these narrow beam boats, I doubt I could fit two in this little pipe though, even staggered, though of course I could do one at the front and one at the back, a contra rotating push - pull arrangement, now that certainly would be a bit different!!

       Trevor
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