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Author Topic: Nixie  (Read 1509 times)

GG

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Nixie
« on: March 16, 2017, 02:12:20 PM »

After a gap of some 10 years I felt like building another RC submarine.  This time the aim was to create a simple design that did not require anything the average modeler might not have, material or skill wise.
The result is an admittedly rather "slab sided" hull but it seems to perform just as well as more rounded forms.  Construction is mainly plywood with some balsa for the extreme bow and stern areas.  The RC gear fits in a watertight box and the application of a bead of grease before securing a removable hatch keeps everything dry.
Being a dynamic diving type, forward motion driving it under the surface, only three RC functions are needed, rudder, hydroplane and motor.  When set up correctly it will cruise around at "periscope depth" (only the top section of the RX aerial being visible) in a most stable fashion.
By having two free-flooding compartments, the 25 inch (63 cm) long hull weighs a convenient 4 1/2 pounds (2 kg).
No problems so far except when I take my eyes away from the "periscope" it can be damn hard to find again.  Fortunately, stopping or reversing the motor has the model immediately resurfacing.
Plans just about to be sent off to the magazine "Model Boats".  Now to think about the next model as I sneak unobserved around the lake!
Glynn Guest
[size=78%] [/size]
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Big Ada

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Re: Nixie
« Reply #1 on: March 16, 2017, 06:23:48 PM »

Will this be for 40megs or 2.4 Gig things?.
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GG

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Re: Nixie
« Reply #2 on: March 16, 2017, 11:00:43 PM »

Big Ada,
        Anything but 2.4 GHz which has trouble passing through water.
GG
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U-33

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Re: Nixie
« Reply #3 on: March 17, 2017, 08:33:44 AM »

Son of Spook, GG?
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Rich

K-157 Vepr. Akula-II (project 971U)
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~~~~~~~  "Motorflotes need love too...."  ~~~~~~~

MotorFlote build log : http://www.modelboatmayhem.co.uk/forum/index.php/topic,15222.0.html

GG

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Re: Nixie
« Reply #4 on: March 17, 2017, 10:37:53 AM »

Rich,
         "Son of Spook" only in general appearance and operation.  Totally different construction.
GG
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U-33

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Re: Nixie
« Reply #5 on: March 17, 2017, 11:53:01 AM »

Hope you don't mind, Glynn...I've posted this on our Facebook sub group.
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Rich

K-157 Vepr. Akula-II (project 971U)
---------------------------------------------------------------

~~~~~~~  "Motorflotes need love too...."  ~~~~~~~

MotorFlote build log : http://www.modelboatmayhem.co.uk/forum/index.php/topic,15222.0.html

MartinL

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Re: Nixie
« Reply #6 on: November 04, 2018, 04:51:15 PM »

Having just built this little beast as my first ever sub I feel I must respond to this topic.
I built it as per plan but used any off cuts I had laying around in workshop so the sides are only 1mm ply and the wtc has a 5mm Perspex lid ( cut from an old printer hood).
Its maiden voyage brought lots of appreciative comments from club members but the little devil would not dive, other than backwards, needs more ballast was the result of much discussion.
The whole bottom was lined with a church roof and it was ready for its second outing (today).
Still it wouldn't dive but it was nearly there. Few bits of stick on lead were added and voila, it dives and potters along at periscope depth, still using 2.4 so dare not let it go any deeper.
This little sub has certainly got me and a few of my club mates interested in the whole sub culture so I must say a big thank you to Glynn and where can I get a 40 MHz radio?
I would add a photo but haven't figured out how to do it yet.
Thanks again Glynn.
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salmon

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Re: Nixie
« Reply #7 on: November 04, 2018, 05:47:38 PM »

Congratulations Captain! It is a wonderful and unique slice of our RC world you jumped into! Glad you did.

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If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.

Davy1

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Re: Nixie
« Reply #8 on: November 05, 2018, 08:20:32 AM »

Really nice to see!


Concerning the "church roof" - model subs always feel really heavy - they need to be about as dense as water!


To reduce the carrying weight you can use "Velcro"  (I use the self adhesive stuff) to fix sheet lead on the bottom of the model. It also lowers the centre of gravity, that way. It also means that you can move it fore and aft easily.


Happy sailing!


David
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GG

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Re: Nixie
« Reply #9 on: November 05, 2018, 10:47:25 AM »

Of all the different types of model plans published, Submarines give me the most worries.  Other types, no matter how badly built and outfitted, can usually be made to float and go but submarine models operate on the proverbial knife-edge between success and failure.  So, the smallest mistake when drawing up the plans and writing up the construction/operating notes for the magazine article could end up with streams of bubbles and complaints!


As for diving trim, these dynamic diving models have to have only a small amount of positive buoyancy.  I ballast them down until the deck is almost awash (see first photo in this thread).  This is sufficient for them to "pop up" to the surface when power is cut.   Astern is best reserved for emergency stops, the models usually being uncontrollable when moving backwards.


Of course the joy of operating RC submarines is reserved for those who did not discard their "old fashioned" 27 and 40 MHz gear in the rush to use 2.4 GHz!  The higher frequency radios might work if you can safely cruise around just submerged but dip too deep and.....?
So glad to hear of this success, any feed back is rare in this hobby (unless it's a complaint of course).
Glynn Guest 
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red181

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Re: Nixie
« Reply #10 on: November 05, 2018, 09:29:55 PM »


I'm so pleased to see this thread, I started building Nixie 12 months ago, it was shelved for other "pressing" rc plane projects, and I started again last week. The plan is once running to turn the tower into a dorsal fin shape, as its intended to use with my Orca Jaws boat.


Please keep posting your progress, pictures and video would be appreciated
Paul
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Arrow5

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Re: Nixie
« Reply #11 on: November 10, 2018, 02:51:20 PM »

What edition of Model Boats was this published in ?  Anybody got a buckshee copy with plan ?   Postage and small donation to a charity ?  I feel a Red November coming on :embarrassed:
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MartinL

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Re: Nixie
« Reply #12 on: November 11, 2018, 02:48:05 PM »

It was in the October 2017 edition. Sorry not got spare because I'm building a slightly bigger version.
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Arrow5

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Re: Nixie
« Reply #13 on: November 12, 2018, 01:15:04 PM »

Thanks Martin.  That was my idea too. I was thinking 25% bigger would be my choice.  Are you going to share a build with us ?
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tony52

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Re: Nixie
« Reply #14 on: November 12, 2018, 02:17:47 PM »

There is currently an October 2017 issue for sale on The Magazine exchange site

http://www.magazineexchange.co.uk/model-boats-magazine-october-2017-issue.html
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Arrow5

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Re: Nixie
« Reply #15 on: November 12, 2018, 03:43:42 PM »

Thanks Tony, I  just bought it :-))   
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MartinL

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Re: Nixie
« Reply #16 on: November 12, 2018, 05:01:06 PM »

I don't think my build would warrant inclusion in these hallowed pages, or to put it another way, I'm a bit of a bodger, more interested in it working rather than the way it looks.
I've got to get my head around putting pictures on the site, if I crack that obstacle then I may have a go.
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TheLongBuild

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Re: Nixie
« Reply #17 on: November 12, 2018, 06:28:08 PM »

I don't think my build would warrant inclusion in these hallowed pages, or to put it another way, I'm a bit of a bodger, more interested in it working rather than the way it looks.
I've got to get my head around putting pictures on the site, if I crack that obstacle then I may have a go.



Makes no difference we love to see pictures of anything model building related....
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