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Author Topic: Red October, as seen in the novel of the same name.  (Read 23561 times)

U-33

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Re: Red October, as seen in the novel of the same name.
« Reply #100 on: August 23, 2014, 02:53:10 PM »

I love your approach to the technicalities of electronics, skip...do I cut the blue wire? Or the red wire? Oh, b*g*e* it, cut the perishin' lot and have done with it...


Rich
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #101 on: August 23, 2014, 03:04:03 PM »

Well, in my defence I did try to do it right, you should see me eating a boiled egg....
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U-33

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Re: Red October, as seen in the novel of the same name.
« Reply #102 on: August 23, 2014, 03:06:46 PM »

The mind, it doth boggle at the very thought of that.... {:-{


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

unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #103 on: September 05, 2014, 05:26:38 PM »

My theory is that retractable hydroplanes, electronics and sea water don't mix...What I am concerned about (probably with no good reason!) is an electronics failure while I have the forward hydroplanes deployed. In this case could I get the lid off to access the electronics? I dont think so. Therefore I added a bow mounted manual retractor, in the shape of a slotted brass screw, connected via a U/J, to the screw shaft that drives the retract system. Now I can deploy the forward planes at a static show with nothing more than a small screwdriver.
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #104 on: September 05, 2014, 05:37:21 PM »

Problem is...now the upper hull has nowhere to screw to the lower hull, there's a U/J in the way!
Much head scratching over much time indeed resulted in a bit of Three Pin Plug butchery. Taking the nice brass earth pin of a standard UK mains plug ( save these old bits up, they are all plastic and 'safe' these days, hardly any decent brass bits to be had..), get a suitable brass coupling end, in this case M4, tap the top of the plug out to suit, screw the brass coupling end on with a mild steel bolt, and solder together. remove the mild steel bolt from the assembly and screw it to the Typhoons retract mech cross beam.
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U-33

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Re: Red October, as seen in the novel of the same name.
« Reply #105 on: September 05, 2014, 05:44:15 PM »

That is bl**dy clever, chap...I'd have never thought of anything like that. Excellent...

Rich
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #106 on: September 05, 2014, 05:49:31 PM »

Luckily there is a suitable hole in the deck to screw through, all I needed was some sort of plate to screw to. This needed to be bonded to the upper hull, in the correct place, while the lid was in place, no problem :-)) .
I had a length of brass shaped to take a mini-camera, camera scrapped, brass kept. Trimmed to shape and test fitted, all looked good. This would need proper abrading on both top and bottom, as would the upper hull of the sub. Make the fibres angry in the hull and you have more chance of epoxy bonding.
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #107 on: September 05, 2014, 05:50:59 PM »

That is bl**dy clever, chap...I'd have never thought of anything like that. Excellent...

Rich

Why thank you sir! I find the longer it takes me to build something, the more chance I may have the odd good idea along the way!
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #108 on: September 05, 2014, 05:55:06 PM »

The next bit had me stumped even after I had reached this stage, until I realised I could adjust the plate up and down on its captive nuts to really tight tolerances. Despite this, I still needed to give it a bit of encouragement with a long, weighted bar, balanced through the hyroplane outlet in the hull side.
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #109 on: September 05, 2014, 06:00:52 PM »

All that was left was to epoxy it in place, applied to the upper hull and to the brass to ensure good coverage, bring the upper and lower hull together and stick the weighted bar in place. Then walk away for 20 minutes and dont think about it!
Cup of tea later and I remembered that it would now need to be unscrewed to seperate the hull parts, luckily it all went swimmingly, the hull slowly seperating as the bolt unthreaded, until I could hear the bolt tripping over its undone thread...jobs a goodun!

Bit more epoxy impregnated with fibreglass strands applied over the brass, locked the whole assembly together.
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #110 on: September 05, 2014, 06:04:17 PM »

I managed to get some better photos of the graphics decorating the model, almost all courtesy of Chris at BECC.
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #111 on: September 05, 2014, 06:10:10 PM »

Electrical work continues apace, with me working back from the bows, shortening and tidying wires where needed. Routing them around the hull with cable ties where needed. I want to have enough slack to be able to remove items but not so much that the model looks like a telephone junction box. the green plugs are gold plated connectors from Multiplex, six pin, very useful.
The further aft you get, the scruffier it is. for the time being.
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #112 on: September 05, 2014, 06:18:35 PM »

Periscope connector was next, this is a three pin affair that I decided to hang off of the bottom of the aluminium hatch. This is all that remains of the original Engel hatch, and will be my day to day access into the model. With access for turning on and off both the main battery, Rx pack and 9.6v sexy lighting battery, plus charging access.
With the hatch opening being about 6" x 2", and hydrogen gas being lighter than air, should I get away with charging a 6v sealed gel cell battery inside, small hatch off, without the risk of blowing it all to bits due to any vented gas from the battery?
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U-33

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Re: Red October, as seen in the novel of the same name.
« Reply #113 on: September 05, 2014, 06:18:52 PM »

The words ''an electricians nightmare'' spring to mind... ;D

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

unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #114 on: September 05, 2014, 06:45:50 PM »

The words ''an electricians nightmare'' spring to mind... ;D

Rich

No, its lovely :}
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Netleyned

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Re: Red October, as seen in the novel of the same name.
« Reply #115 on: September 05, 2014, 06:52:52 PM »

On a slow charge  500 mA or so not enough gas
for a mouse fa*t  :-))

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type82

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Re: Red October, as seen in the novel of the same name.
« Reply #116 on: September 15, 2014, 08:42:36 PM »

You have your smarty farty acrylic in that one too ay

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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #117 on: September 23, 2014, 11:58:47 AM »

One loves how the old acrylic sheet can be worked for different jobs. Once I discovered how easy it was to polish the edges to make it look proper professional, plus how easily it takes to thread tapping, oh yes..and you can glue it too.
Whats not to like?
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #118 on: October 21, 2014, 06:08:27 PM »

More pictures of wire, as I have designed the switch mounting..removeable to access the piston tanks if needed. Wired up the three on/off/charging switches ( Main power 6v, Rx pack 4.8v and snazzy, showy off lighting effects 9.6v ), and fitted the salt water Rx antenna.
Antenna connection is in the water, using a length of Plastruct insulated steel wire, this was soldered to the red wire, then epoxied and double heat shrunk while the epoxy was still curing..the old sledgehammer cure. Internal Rx connection between the external through connection and the Hitec 7ch Rx, broken with a 2mm Gold Connector, also heat shrunk at both ends.
Everything now wired up, just got to tidy it all away and test it...not my favourite part of the build.
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #119 on: January 02, 2015, 05:55:50 PM »

A couple of problems with the fit out. A constant glitching problem was finally cured when I replaced the Hitec Dual Conversion Receiver with a Futaba equivalent. Now running sweetly with an F14 Transmitter.

The other problem... now call me a Donut if you will but...I have been having trouble getting the front hydroplane mechanism to work properly. It deploys and retracts fine, but the servo that alters the hydroplanes pitch once deployed doesn't work. I have checked the soundness of the connections, all good. Continuity checked the cables, replaced the servo ( since found to work perfectly! ), printed out the wiring diagram, colourized it and have been staring at it blankly for many an hour, and so on.
however there may be light at the end of the tunnel. I have a 3 position momentary switch on the transmitter controlling the functions and all I get out of the servo is a glitch when the planes first deploy fully, I then let go of the momentary switch and the the control goes to the mid position, disconnecting any power to the three relay block which controls everything, now for the donut bit!!
Should I be using either a latching three position switch on my transmitter or maybe even a two position switch, leaving the system energized in either Deployed or Retracted, leaving the Engel electrics to do the rest of the work, enabling or disabling the hydroplane servo? If so, its a proper DONUT moment as I have been staring at the problem, prodding it with a multimeter etc for the best part of four hours.
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unbuiltnautilus

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Re: Red October, as seen in the novel of the same name.
« Reply #120 on: January 02, 2015, 05:57:11 PM »

...and there may not even be a problem :embarrassed:
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type82

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Re: Red October, as seen in the novel of the same name.
« Reply #121 on: January 02, 2015, 06:23:37 PM »

Doughnut
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surfs up

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Re: Red October, as seen in the novel of the same name.
« Reply #122 on: January 02, 2015, 06:55:46 PM »

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type82

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Re: Red October, as seen in the novel of the same name.
« Reply #123 on: January 02, 2015, 06:57:05 PM »

Ha ha yep  :-))
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Re: Red October, as seen in the novel of the same name.
« Reply #124 on: January 02, 2015, 07:31:55 PM »

Hi.U.B.N.
As the others have said....You need a 2 position switch ie either there in or
There out.
This is the same set up as my Engle Akula with all the options.
Regards Sub.
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