Model Boat Mayhem

Dry Dock / Shipyard: Builds & Questions => Submarines => Topic started by: Robin smith on January 12, 2016, 09:58:01 PM

Title: Submarines general
Post by: Robin smith on January 12, 2016, 09:58:01 PM
i have had a number of subs , the OTW type 7c, the OTW Vanguard, the Robbe U47 as a dynamic diver and then acquired an Engel Lafayette. I sold them all and built a 1/12 Seven lifeboat and sold that. I have just ordered an Engel Type 7c which I am waiting on its arrival. All the slots now are pre cut. The Engel Lafayette was excellent to sail in fact you could fly it. My OTW type 7c I eventually built the later conning tower with the two decks for additional AA guns. The only problem was it was always in bits with WTC problems, the Vanguard performed well. Looking forward to getting my Engel Type 7c. Having been involved with lifeboat building I have to comment on the passionate nature of all the lifeboat guys. I don't see the same degree of enthusiasm from submarine builders 😂😂 I don't understand why? 😩
Title: Re: Submarines general
Post by: Norseman on January 12, 2016, 10:03:55 PM
Robin I think you'll find periscopes popping up soon  O0

Dave  :}
Title: Re: Submarines general
Post by: essex2visuvesi on January 13, 2016, 12:26:33 AM
We're here
Lurking and watching unseen


(http://www.gifs.net/Animation11/Transportation/Sea_related/Submarine_and_periscope.gif)
Title: Re: Submarines general
Post by: Tug-Kenny on January 13, 2016, 10:34:07 AM
@Essex.  Did your Father  finish his monster sub  ?  Has in been in the water yet  ?

ken
Title: Re: Submarines general
Post by: unbuiltnautilus on January 13, 2016, 10:35:34 AM
"Submarines are underhand, unfair and damned un-English." Also rarely orange...which is why we like them %)
Title: Re: Submarines general
Post by: essex2visuvesi on January 13, 2016, 11:21:52 AM
@Essex.  Did your Father  finish his monster sub  ?  Has in been in the water yet  ?

ken


Ken I think you have me mixed up with someone else
My dad did planes
Title: Re: Submarines general
Post by: Subculture on January 13, 2016, 11:29:02 AM
Robin, are you referring to the content on this forum, or expressing a more holistic opinion?
Title: Re: Submarines general
Post by: TomHugill on January 13, 2016, 12:03:29 PM
This forums not great for model subs but I've found the community in general to be very pasionate in general!
Title: Re: Submarines general
Post by: Crossie on January 13, 2016, 12:09:16 PM

 Perhaps the lack of demonstrable passion is because building submarines especially from scratch , I cannot speak on assembling a kit of parts, causes us submariners to spend so much time in our sheds, at lathes and playing with resins , and straining our grey cells by figuring outhow we can cram a quart of these mechanical gubbins and electronic trickery into a pint pot tube and get it to work without leaking- - - -and not throw a wobbly when it does- - - - that we become just a little bit hermit like .

    The phrase I should get out more springs to mind %%

                           Trevor
Title: Re: Submarines general
Post by: Tug-Kenny on January 13, 2016, 12:14:25 PM

Ken I think you have me mixed up with someone else
My dad did planes

So sorry.  You are correct.  It must be the drugs I'm on.  Sorry to spoil the thread.

Cheers

ken
Title: Re: Submarines general
Post by: jaymac on January 13, 2016, 12:51:59 PM
So sorry.  You are correct.  It must be the drugs I'm on.  Sorry to spoil the thread.

Cheers

ken

So thats where the Talacre money went :}
Title: Re: Submarines general
Post by: Tug-Kenny on January 13, 2016, 01:45:57 PM

I've found the blog............   It should have been addressed to  'raflaunches'         %)    sorry

ken

I'm under the lady doctor
Title: Re: Submarines general
Post by: Subculture on January 13, 2016, 02:11:20 PM
Amazing treatment on the Nhs these days!
Title: Re: Submarines general
Post by: nemesis on January 13, 2016, 03:12:39 PM
Hi, I scratch built a scale Type VIIc 41/43 mainly for solving the problem of submerging and getting it up again. A fellow modeller who had watched the build and all the trials and tribulations made the comment " you must be mad, all that work and you sink it". In a way he was right especially on our lake. I did get the chance to sail in the local swimming pool, that was brilliant, flying under the water.  Nemesis
Title: Re: Submarines general
Post by: essex2visuvesi on January 13, 2016, 04:42:23 PM
I've found the blog............   It should have been addressed to  'raflaunches'         %)    sorry

ken

I'm under the lady doctor


You lucky man!
Title: Re: Submarines general
Post by: raflaunches on January 13, 2016, 06:02:14 PM
So sorry.  You are correct.  It must be the drugs I'm on.  Sorry to spoil the thread.

Cheers

ken



Hi Ken


Yes he has, I think there are some pictures of HMS X1 on the water under the thread Project Eleven HMS X1
We had to convert the individual throttles to one because even with separate controls she didn't manoeuvre any different to that of a single throttle control. Turrets worked beautifully. I think my dad is just looking for one item (fitting) and she's finished.
Title: Re: Submarines general
Post by: Norseman on January 13, 2016, 08:52:28 PM
" you must be mad, all that work and you sink it".

Build a Springer in the shape of a conning tower I say  ;D  :}

Dave
Title: Re: Submarines general
Post by: Robin smith on January 13, 2016, 09:24:22 PM
I am so pleased that I provoked something. It's just that being involved with a lifeboat build there is a great deal of posting which I did not see on the sub side. All my models have been built with attention to detail I have not necessarily experimented with dive systems etc. I must say that I prefer Engel type in so far as I feel there is more control rather than a pump system. Many of you guys are technically more knowledgeable than me on this subject. I have done a fair bit of research especially into the Uboat type 7c and spend a fair bit of time on uboatnet reading up on the technical aspects, the guys who sailed them and the havoc they caused. Looking forward to getting my Engel 7c I expect I will detail this. I have in the past had to be careful in our club lake with weed and branches etc. Duck poo great for weathering.....
Title: Re: Submarines general
Post by: Robin smith on January 13, 2016, 09:31:28 PM
Forgot say that with surface vessels you build and hammer round the lake and I lose interest? At least with a sub you can have fun even if it is a simulated attack run on a club member who knocked your periscope off the previous week....or even surface under a duck!!! I always found with my subs that they always attracted interest from the public. Again like my two yachts, you have to think and work at it as a consequence more interest! ☺️
Title: Re: Submarines general
Post by: TomHugill on January 14, 2016, 07:59:20 AM
I am so pleased that I provoked something. It's just that being involved with a lifeboat build there is a great deal of posting which I did not see on the sub side. All my models have been built with attention to detail I have not necessarily experimented with dive systems etc. I must say that I prefer Engel type in so far as I feel there is more control rather than a pump system. Many of you guys are technically more knowledgeable than me on this subject. I have done a fair bit of research especially into the Uboat type 7c and spend a fair bit of time on uboatnet reading up on the technical aspects, the guys who sailed them and the havoc they caused. Looking forward to getting my Engel 7c I expect I will detail this. I have in the past had to be careful in our club lake with weed and branches etc. Duck poo great for weathering.....

I've read that his type 7 is quite a tricky build. There's a chap build one on rcgroups who's thread I would advise you to read as it might save your from some of the pitfalls of building one.
Title: Re: Submarines general
Post by: Crossie on January 14, 2016, 09:39:02 AM
Build a Springer in the shape of a conning tower I say  ;D :}

Dave

       Funny you should say that Norseman  :-)) . I suppose that I ought to blow the shed dust off this project and get it finished now.

                  Trevor.
Title: Re: Submarines general
Post by: unbuiltnautilus on January 14, 2016, 02:38:13 PM
I am so pleased that I provoked something. It's just that being involved with a lifeboat build there is a great deal of posting which I did not see on the sub side. All my models have been built with attention to detail I have not necessarily experimented with dive systems etc. I must say that I prefer Engel type in so far as I feel there is more control rather than a pump system. Many of you guys are technically more knowledgeable than me on this subject. I have done a fair bit of research especially into the Uboat type 7c and spend a fair bit of time on uboatnet reading up on the technical aspects, the guys who sailed them and the havoc they caused. Looking forward to getting my Engel 7c I expect I will detail this. I have in the past had to be careful in our club lake with weed and branches etc. Duck poo great for weathering.....

I have just completed a Red October mod on a ten year old Engel Typhoon and I have to say that I am impressed with the in built safety systems fitted. With internal over pressure safety, water depth pressure safety, plus signal failsafe blowing the tanks, I felt very confident ( after the first run! ) to put it through its paces. Next on the slip is an Engel Nautilus, also about ten years old...we shall see how that handles.
Title: Re: Submarines general
Post by: essex2visuvesi on January 14, 2016, 02:53:33 PM
Next on the slip is an Engel Nautilus, also about ten years old...we shall see how that handles.


Does this mean your name will change to partbuiltnautilus
Title: Re: Submarines general
Post by: unbuiltnautilus on January 14, 2016, 03:44:45 PM

Does this mean your name will change to partbuiltnautilus

In answer to your question...good question!
Partbuiltnautilus sounds almost like part build nautilus...first issue 99p then 8.99 an issue for 144 weeks, cheaper to go to Engel :}
Title: Re: Submarines general
Post by: essex2visuvesi on January 14, 2016, 03:50:45 PM
OK


Partiallybuiltnautilus


Maybe we can have a vote :D
Title: Re: Submarines general
Post by: deadbeat on January 14, 2016, 04:10:49 PM
Just had an excellent tour of HMS Alliance this afternoon, my mate and I were the only two on the tour, the guide was excellent and we took 11/4 hours, much better than the 10 minute walk thorough you get in the summer.
Title: Re: Submarines general
Post by: Norseman on January 14, 2016, 05:12:16 PM
      blow the shed dust off this project and get it finished now.

Yes Trevor go for it - and add a nice deck gun. Which navy?

Dave
Title: Re: Submarines general
Post by: thegrimreaper on January 14, 2016, 05:20:33 PM
I have just completed a Red October mod on a ten year old Engel Typhoon and I have to say that I am impressed with the in built safety systems fitted. With internal over pressure safety, water depth pressure safety, plus signal failsafe blowing the tanks, I felt very confident ( after the first run! ) to put it through its paces. Next on the slip is an Engel Nautilus, also about ten years old...we shall see how that handles.


just swapped an Engel Gato fully working am now in the process of building the Engel Nautilus just got to scrape a load of paint off the outer hull that the idiot who started her did


(http://s19.postimg.org/6v92bxmwf/12249926_10153861567009274_4037415438735001571_n.jpg) (http://postimg.org/image/6v92bxmwf/)


Mark.
Title: Re: Submarines general
Post by: unbuiltnautilus on January 14, 2016, 05:27:28 PM
I would refer you to my painting guide on the build thread, but it pretty much says "do as I say not as I do!" Me, I would just spray the new colour straight over what went before, hair drier in hand just in case it thinks of pickling!
Title: Re: Submarines general
Post by: Klunk on January 14, 2016, 07:46:26 PM
Having seen that particular nautilus,  over painting ot would not help. I believe the paint was troweled on!!!
Title: Re: Submarines general
Post by: Robin smith on January 14, 2016, 08:25:50 PM
Tom , I am in the process of reading this on regroups. When you get old you have to read things over and over. Seriously there are some points to note which I am sure will help me. The new hull is all pre drilled which put a lot of people off this kit. I know some have said about brass etched decks but my OTW had brass decks and they didn't really like keep coming off. Think anyone building the OTW would be better with stst plates. Still not arrived yet was promised for the 6 January apparently waiting on couple of servos.
Title: Re: Submarines general
Post by: Crossie on January 14, 2016, 09:05:14 PM
Yes Trevor go for it - and add a nice deck gun. Which navy?

Dave
[/quote]

     Oh yes! It'll definitely have a gun and a couple of other things too, but as to which navy, well with a feature from this, that and t'other submarine type it'll probably be a dis-united nations navy! Will do a bit on this project tonight, I found the motor and propshaft today and a rudder must be around somewhere amongst the clutter.

                            Trevor
Title: Re: Submarines general
Post by: thegrimreaper on January 14, 2016, 09:45:31 PM
Having seen that particular nautilus,  over painting ot would not help. I believe the paint was troweled on!!!


you got that right Klunk but its all off now and going together nicely


Mark.
Title: Re: Submarines general
Post by: Subculture on January 14, 2016, 10:05:01 PM
Looks like you got the Engel Nautilus hull with the upgraded fittings and extra detailing on the underside, earlier versions had none.
Title: Re: Submarines general
Post by: thegrimreaper on January 15, 2016, 06:38:22 AM
Correct Andy extra rivet detail on underside of hull looks good but is a devil to get old paint off that has been troweled on T-Max 2 dive system so a relativley new craft. light units fell to pieces on removal so had to rebuild them 10mm LED`s off the internet are cheep so changed the colours from the drab Orange to White Blue and Orange


Mark.
Title: Re: Submarines general
Post by: MickyR1968 on January 15, 2016, 01:11:13 PM
Have you thought of soda blasting the hull to get the paint off
Title: Re: Submarines general
Post by: thegrimreaper on January 15, 2016, 01:20:32 PM
Thought of all sorts MickyR1968 even contemplated a BLOW TORCH  {-)  took the slightly simpler route of water based stripper and a lot of time that has brought it up nice and ready for primer soon


Mark.

Title: Re: Submarines general
Post by: Subculture on January 15, 2016, 02:57:28 PM
I use De-solv-it graffiti remover on plastic shells/hulls. It was designed for removing graffiti from lexan/polycarbonate bus shelters, so it's plastic safe. Works very well, dab it on leave for a couple of hours, then just rub the paint off. No nasty fumes like the old nitromors etc.

Very thick paint tends to need more than one application though.

You can get it at Screwfix.

https://www.youtube.com/watch?v=dM6tpvlqRU4

Title: Re: Submarines general
Post by: Robin smith on January 15, 2016, 10:31:40 PM
We are all communicating☺️☺️☺️☺️☺️☺️☺️ Good to see
Title: Re: Submarines general
Post by: essex2visuvesi on January 15, 2016, 10:50:33 PM
Mr muscle oven cleaner is another useful tool for the shed


Make sure you wash it off thoroughly afterwards
Title: Re: Submarines general
Post by: Stavros on January 15, 2016, 11:39:00 PM
And fairy Power spray is even better


Dave
Title: Re: Submarines general
Post by: Subculture on January 16, 2016, 11:10:14 AM
All the oven cleaners I've used have just been caustic solutions. You can mix your own for very little but you need to be careful about splashing it about.

However I find the graffiti remover better. having said that it appears Screwfix are no longer listing it on their website, which is a bummer.
Title: Re: Submarines general
Post by: Norseman on January 17, 2016, 12:05:56 PM
you need to be careful about splashing it about.

Same with money  O0

Can anyone tell me the length of a type seven conning tower base with a double wintergarden? Or if there is a diagram lurking online?

Dave
Title: Re: Submarines general
Post by: Subculture on January 17, 2016, 12:18:37 PM
Like this?
Title: Re: Submarines general
Post by: Norseman on January 17, 2016, 01:43:47 PM
Is there no depth you won't sink to

... to be helpful?  %) Thanks.

Dave
Title: Re: Submarines general
Post by: Norseman on January 17, 2016, 11:27:34 PM
http://www.mille-sabords.com/forum/index.php?sh40300

I followed a few links and ended upon a French thread. There's nine pages with lots of old U Boat pics to look at including a good few boat's emblems. I have only a little french so I guess I missed a lot of info.

Dave
Title: Re: Submarines general
Post by: Crossie on January 18, 2016, 08:35:53 PM
Yes Trevor go for it - and add a nice deck gun. Which navy?

Dave

         Well having blown the dust off it was apparent that the superstructure had suffered more than just a little bit of 'shed rash' and so the best move there was to convert in into heat via the log-burner and start again. That's one advantage of working in wood!
          Anyway after a couple of evenings work my Springer has got a new superstructure which I hope looks suitably 'cartoonish' as befitting a submarine tug .
          Don't laugh too loudly at the AA armament because I know the absolute square root of nothing about naval weaponry so it's - a bit heavy duty maybe- sort of an Oerlikon on steroids.
          A submarine has absolutely got to have torpedo tubes even if it is tug in disguise, and so a cling film roll provided the tubes for those, a really hard and strong cardboard which should be suitably waterproof once soaked in varnish.
          A sub needs a periscope even one that doesn't dive - - - well I hope that it won't, though folk have told me that Springers can poke the nose down when going briskly.
          Next will be a few bits of bridge equipment, a compass at least.

                                                  Trevor
Title: Re: Submarines general
Post by: Crossie on January 18, 2016, 08:48:26 PM
    The other thing that needed to be started afresh was the propshaft/sterntube as the shaft did not run true, so I've made it as a combined motor mount/gearbox/ stern tube unit that has a miniature ballrace at the inboard end and a lip seal at the wet end. This is actually a part from an abandoned submarine project and the reduction is 2.5:1 . The assembly will then bolted onto the hull with a seal and the prop end will be supported in an A frame, but I couldn't get any 'shed time' today to drill all the holes and cut a seal,

                                                       Trevor
Title: Re: Submarines general
Post by: Subculture on January 19, 2016, 02:42:23 PM
Is there no depth you won't sink to

... to be helpful? 

There is, and there one or two in this hobby who have chosen to test that to the limit.
Title: Re: Submarines general
Post by: Norseman on January 19, 2016, 02:57:54 PM
Sub's needs a hatch Trevor - looking like a fun build though  O0
Title: Re: Submarines general
Post by: Crossie 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
Title: Re: Submarines general
Post by: essex2visuvesi 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
Title: Re: Submarines general
Post by: Crossie 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 %%

                                                                      Trevor
Title: Re: Submarines general
Post by: Subculture 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.
Title: Re: Submarines general
Post by: Crossie 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
Title: Re: Submarines general
Post by: essex2visuvesi on January 19, 2016, 07:30:14 PM
OK Looks pretty straight forward


Let me know a rough hatch diamteter
Title: Re: Submarines general
Post by: Crossie 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
Title: Re: Submarines general
Post by: Hellboy Paul on January 19, 2016, 09:25:18 PM
Something like this http://www.ebay.co.uk/itm/MMB-SCUTTLE-HATCH-27mm-1-PACK-/272103860816?ssPageName=STRK:MESE:IT


Paul..
Title: Re: Submarines general
Post by: essex2visuvesi on January 19, 2016, 11:27:47 PM
Quick run off


less than an hour from start to finish
(http://i532.photobucket.com/albums/ee322/Essex2Visuvesi/IMG_3261.jpg) (http://s532.photobucket.com/user/Essex2Visuvesi/media/IMG_3261.jpg.html)


The handle detail is not great so it might be better to fabricate something from brass wire or something
Title: Re: Submarines general
Post by: Klunk 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.
Title: Re: Submarines general
Post by: essex2visuvesi 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
Title: Re: Submarines general
Post by: Crossie 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

Title: Re: Submarines general
Post by: unbuiltnautilus 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 :-))
Title: Re: Submarines general
Post by: Crossie 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?

                                   Trevor
Title: Re: Submarines general
Post by: unbuiltnautilus on January 20, 2016, 02:10:42 PM
Always happy to light a spark...even if there is a keg of gunpowder about :}
Title: Re: Submarines general
Post by: essex2visuvesi on January 20, 2016, 04:56:53 PM
Got me thinking....


Riva Springarama anyone?
Shovelnose springer perhaps?
Title: Re: Submarines general
Post by: Norseman 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
Title: Re: Submarines general
Post by: unbuiltnautilus 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 :-))
Title: Re: Submarines general
Post by: Subculture on January 20, 2016, 08:18:17 PM
Is this the replacement for Nuclear deterrent?
Title: Re: Submarines general
Post by: Crossie 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!

                                                       Trevor
Title: Re: Submarines general
Post by: Subculture 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.
Title: Re: Submarines general
Post by: Crossie 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

                                                               
Title: Re: Submarines general
Post by: Crossie on January 20, 2016, 10:23:42 PM

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

                                                             Trevor
Title: Re: Submarines general
Post by: Subculture 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.
Title: Re: Submarines general
Post by: Crossie 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
Title: Re: Submarines general
Post by: unbuiltnautilus on January 22, 2016, 04:00:33 PM
I have just finished converting one of these for the Royal Navy, honest...and it still works :-))

 And you didn't believe me %)
 
 Made as an educational tool, the original sub suffered a terminal failure. The innards of which were one of these subs ( actually a cheaper, nastier version on examination!) . It seemed more sensible to just use a donor sub, rather than silicone the innards back into the original hull, which was virtually destroyed to get into it first time...too much silicone adhesive used! I painted the sub black and trimmed it slightly stern heavy. Most of the work was in ripping the Tx to bits and building it into the base unit.
The screen runs a ten minute programme detailing the do's and dont's of operating submarines, while the snotty little oiyks get to try one out for real..good fun :-)
Title: Re: Submarines general
Post by: essex2visuvesi on January 26, 2016, 11:29:18 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


The Hatches are ready, they will need a little light finishing with some sandpaper and primer


Drop me a PM with your Address and I'll sling em in the post
Title: Re: Submarines general
Post by: Crossie on February 15, 2016, 09:53:41 PM
  Thanks to the generosity of essex2visuvesi the sub springer now has a tower and a gun deck hatch, I've fitted these with a pair of Robart mini hinges so they can be set open as seen here, or shut. There's a short length of blanked off tube below the hole so that if this springer does take a bit of water topside it won't get into the hull , it'll just have a couple of deck mounted paddling pools instead!

                             Trevor
Title: Re: Submarines general
Post by: essex2visuvesi on February 15, 2016, 09:55:08 PM
Marvellous! :)


They look good
Title: Re: Submarines general
Post by: Crossie on February 15, 2016, 10:06:13 PM
   There's now been a little bit of progress below decks and the machinery is now being installed, the esc needs to be attached somewhere
Title: Re: Submarines general
Post by: Crossie on February 15, 2016, 10:18:31 PM

 While below the water-line, err um, isn't all of a sub supposed to be below the water-line, oh well never mind, anyway the rudder has been well hung.
 The shipyard storeman is frantically scrabbling about for a propeller that conforms to the specification and may have to see the bean counter for some additional refunding and set off to the chandler's store.

                                     Trevor