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Optical Fiber Diameter for Seaview "Cadillac Fins"?

Nautilus, Seaview, and more

Optical Fiber Diameter for Seaview "Cadillac Fins"

Postby Carter » Sat Jul 04, 2009 3:45 pm

I'm building the Moebius Seaview and lighting it. What is the proper diameter of optical fiber to use in the Seaview stern fins?


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Postby junglelord » Sat Jul 04, 2009 7:06 pm

Hi, I tried some fiber optics, but a 3mm LED is much nicer.
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Postby Carter » Sat Jul 04, 2009 10:57 pm

Hi Junglelord:

I saw your post on another forum about the LED's available on e-bay. I've contacted him and after I make measurements will be getting a set. So anyway, the wires will fit in the fins I take it?

One thing I wonder about is the brightness. Won't the LED's direct appear too bright? Afterall, the 3mm LED's in the nose and under the bow fins are spotlights, while the lights in the fins are simply navigation lights?

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Postby Sub culture » Sun Jul 05, 2009 6:42 am

You can dim LED's using a cheap and simple forwards only ESC- the tiny type used for park flyers etc.
'Why are you staring at an empty pond?'

Want to dive your boat in crystal clear water? Then you had better Dive-in- http://www.diveintomodelsubmarines.co.uk
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Postby raalst » Sun Jul 05, 2009 7:36 am

in the dry part of your sub you could dim the led with a simple variable resistor in series (and in addition to any other resistors, to prevent burnout of the LED)
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Postby Bob the Builder » Sun Jul 05, 2009 7:36 am

Another tip is to grind off the tip of the LED with a dremel or file. The rounded tip helps to focus the light beam, and grinding it flat (or even better as an inverted cone) helps to disperse the light far more evenly. I use that trick on all my Nautilus builds so that the spotlights are more visible from a greater angle.

Just don't grind too far down...
Bob Martin,
RCSub homepage: http://www.rc-sub.com
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Postby Sub culture » Sun Jul 05, 2009 9:16 am

raalst wrote:in the dry part of your sub you could dim the led with a simple variable resistor in series (and in addition to any other resistors, to prevent burnout of the LED)


That only works to a degree. With PWM you have the same amount of dimming control as with a filament lamp.
'Why are you staring at an empty pond?'

Want to dive your boat in crystal clear water? Then you had better Dive-in- http://www.diveintomodelsubmarines.co.uk
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Postby junglelord » Sun Jul 05, 2009 6:18 pm

Actually its 5mm in the nose and under the bow. 3mm in the fins and tower.
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