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Author Topic: Red October, as seen in the novel of the same name.  (Read 23555 times)

unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #75 on: August 13, 2014, 06:11:37 PM »

Flags next. A soviet Naval Ensign and the classic Red Flag, flown from the bow and sail. The two jackstaffs are removable for sailing, stowed inside the hull where they normally fall through the free flood holes in the bottom of the boat!
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U-33

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Re: Red October, as seen in the novel of the same name.
« Reply #76 on: August 13, 2014, 06:11:56 PM »

My heartiest congratulations, Skip..that looks superb, very impressive job of weathering. Not too much...not too little...that's as near perfect as I've ever seen.


Rich
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #77 on: August 13, 2014, 06:16:43 PM »

Why thank you very much sir! I have been practicing my weathering since 1982, I feel I may be getting the hang of it...As you say " not too much.." Every new model seems to get just that little bit less weathering, certainly as I used to do it anyway! My only worry being that one day, in the not too distant future, I may have to polish my models before taking them out for a sail.

Not at the moment though :}
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #78 on: August 13, 2014, 06:22:27 PM »

And the final addition to the model, special ordered from Chris at BECC, ( much appreciated ), 'CCCP' logos, Hammer and Sickle logos for the sail, and a bit of Soviet era heraldry for the bow of Typhoon Seven. Ready and fitted for its first outing at Beale Park.
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #79 on: August 13, 2014, 06:28:05 PM »

With the paint job complete, the model went into hibernation for the best part of four years, only emerging for static shows and sci-fi fairs. The good news being that I am now on the home straight regarding RC installation, so Red October should hit the test tank within the month. Then I can expose my weathered submarine to the grubby waters of Canoe Lake in Southsea. then we shall see what REAL weathering looks like!
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #80 on: August 14, 2014, 05:21:06 PM »

And just to prove we can all make a proper pigs ear of a job....what not to do with an airbrush with a top loading lid; let it fall off over the job in hand %)
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Netleyned

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Re: Red October, as seen in the novel of the same name.
« Reply #81 on: August 14, 2014, 05:33:54 PM »


Looks like one of the Russian dockyard Mateys had too much
Vodka in his tea break and dropped his paint kettle %%

Ned
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #82 on: August 20, 2014, 12:31:05 PM »

Okay, a question for Engel sub builders; I have a common earth wire running from the cans of both main motors, with no indication of where to stick them (!). Convention would suggest soldering these to the propshaft, but the design of the Typhoon precludes this as an option, any suggestions?
I have never been a fan of earthing components and have never done this in any other model, however the amount of electronics residing in the Typhoon has given me pause. ( Chop it off, chuck it in the bin, pretend it was never there, being my usual response! )
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spooksgone

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Re: Red October, as seen in the novel of the same name.
« Reply #83 on: August 21, 2014, 07:11:02 AM »

Looking fantastic [the sub] and a really good read. Thank you. Earth wires? you sound like a man after my own heart. Good stuff, and thanks again.
Phil
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Subculture

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Re: Red October, as seen in the novel of the same name.
« Reply #84 on: August 21, 2014, 04:14:52 PM »

You can run the earth wires back to the negative terminal of your battery. Mike Stothers recommends inserting a current limiting resistor in that wire to prevent a shorted capacitor or brush cooking things.

unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #85 on: August 21, 2014, 04:32:23 PM »

How about a brass bolt through the hull, earthing through that to the water?
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #86 on: August 21, 2014, 05:09:24 PM »

Earth wires back to the negative terminal seems just..wrong. I know it isn't but.

Anyhow, the TEAS Dive Control board features two sockets marked Earth or Ground as spares, into which the similar earth cables from the piston pump motor casings are fed, So I assume they find their way back to the batteries negative terminal through the board, so it might well be an 'in for the penny' moment.

What sort of current limiting resistor are we talking about, little tiddler or stuffing great big one?!
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microgyros

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Re: Red October, as seen in the novel of the same name.
« Reply #87 on: August 21, 2014, 10:35:57 PM »

Oh gawd. That story of the Typhoon. <:(

It went something like this...
What's the wire for? It improves signal to noise...oops, what went wrong?...autopsy on a Rokraft 20 Navy...just leave the original wiring as supplied but insert a 22Ω  or 47Ω resistor & shunt connect a 100nF capacitor just in case ...oops...send the replacement doodah back for investigation/repair...check here & here with an ohmmeter...the cap fell apart when you touched it?...ok replace and fit a 22Ω  or 47Ω  resistor & shunt capacitor or whatever.
...the end.

Forget the resistor if it is too fiddly.Just use the lowest suitable main fuse. That should do if you avoid a fault path through servo cable.
 
A fuse worked in the case of the coffee grinder,the electric carving knife,the document shredder.
No harm done. Just 2p failed polyester capacitors had to be replaced by 20p class Y capacitors and the items had a new lease of life.
This issue is a bigger scandal than crummy smartphone screens but I'm not taking a 5 year old kitchen appliance back to a shop and showing what the Maplin catalogue says in the passive component section.

Goodnight and see you at Bournville, Barrow or Leamington Spa!
 
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #88 on: August 22, 2014, 12:24:28 PM »

If I read that right, you are suggesting fully suppressing the motors, then fit a fuse in my ground wire from the motor casings?
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Subculture

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Re: Red October, as seen in the novel of the same name.
« Reply #89 on: August 22, 2014, 02:56:28 PM »

Not quite. What Mike is suggesting inserting a resistor in the line with a cap in parallel, or you can just run a straight cable back to negative without either, provided the circuit is fused, so if you do get a short, the fuse will blow.

unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #90 on: August 22, 2014, 04:59:28 PM »

Forgive me for being just a bit of a 'potato head' but are we talking about a setup as illustrated, with the rectangle being the resistor and the yellow circle the capacitor? Also  concerning the resistor, are we talking about one of those tiddly little 0.6 watt things or a stuffing great ceramic resistor?
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Re: Red October, as seen in the novel of the same name.
« Reply #91 on: August 22, 2014, 05:19:36 PM »

1 or 2 watts will do the job for the resistor. The diagram looks correct.

unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #92 on: August 22, 2014, 05:45:07 PM »

Excellent, much appreciated all round, off to that great font of all knowledge, Maplins, tomorrow...better take part numbers with me :}
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Re: Red October, as seen in the novel of the same name.
« Reply #93 on: August 22, 2014, 06:11:45 PM »

Why an RC filter on the negative line of a DC ?
please let us know.
Just Submarines or all craft.

Ned
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #94 on: August 22, 2014, 06:16:12 PM »

Why an RC filter on the negative line of a DC ?
please let us know.
Just Submarines or all craft.

Ned

Dont ask me, I only work here! Lets wait for the experts.
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microgyros

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Re: Red October, as seen in the novel of the same name.
« Reply #95 on: August 22, 2014, 07:15:55 PM »

Maplin, for a resistor, is an expense too far and that is not what I had in mind when imagining Roy's Typhoon.

A  ground strap conducted a fault current when one brush to case capacitor failed. A fusible link in the strap from narrow gauge wire or made from vero track would have prevented damage just as well.

hold on.
A picture is worth a thousand words.
Connecting one of the brushes to case eliminates common mode noise. (google that)
That is why car electrics and bicycle dynamo have a wired positive feed and the negative return through the chassis. The motor from a dust-buster vac you would have that too.
But the auto motors or 12v accessories don't ever change polarity like an esc does to an RC boat motor.

You can connect one brush terminal in each motor to its own case auto-electric style but make sure the cases don't touch anything else
Remove ground strapping or motor to motor link.
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #96 on: August 23, 2014, 12:18:32 PM »





Connecting one of the brushes to case eliminates common mode noise. (google that)
That is why car electrics and bicycle dynamo have a wired positive feed and the negative return through the chassis. The motor from a dust-buster vac you would have that too.
But the auto motors or 12v accessories don't ever change polarity like an esc does to an RC boat motor.



Okay, got that. The model has a pair of Mtroniks Vipers, about three generations older than current ones. I am going to run these through a mixer, giving me forward on one motor, reverse on another. The idea of any of this voltage leaking through Mtroniks Vipers is more than a little worrying. Treat them well and they are fine, dont treat them well and they will bite you.

So, I like the vero board fuse idea ( it worked well when I nearly cooked a Multiplex radio, prodding away with the batteries connected, watching the vero board fry concentrates your mind! ), but will isolate all the earth connections from each other and any other sources of voltage for the time being. Get the model in the water and tested, then react if any problems arise.
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U-33

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Re: Red October, as seen in the novel of the same name.
« Reply #97 on: August 23, 2014, 12:22:19 PM »

I could see the magic smoke escaping from here...   :o


Rich
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #98 on: August 23, 2014, 12:35:14 PM »

We just had a discussion here about how electronics these days are sophisticated bits of kit, taking all this eart stuff into account. Until I mentioned that this was German electronics, why make it simple when you can make it complicated :}
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #99 on: August 23, 2014, 01:29:30 PM »

Another discussion just had, and 'no-no' to earthing through the hull either. Possible issues between the earthing point and the Rx antenna.

See, chop it all out and chuck it in the bin...should be my motto. Good Idea.
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