Friday, June 22, 2007
Working up top
Now this wouldn’t be necessary if I hadn’t planned on putting working lights up there. In a boat this size it seems a shame not to do this though. I like sailing Pigeon Pie at dusk with her lights on and so I want the same option for Tomsk. Besides if the boat sinks again, at least I stand a chance of seeing it in the water !
The navigation lights are brass and the mast light plastic. I think they are both from Robbie but have thrown the packaging away. If I’m wrong it doesn’t matter too much as there are plenty of people who do these things.
Putting the wires up the mast took some serious fiddling – they are very thin and prefer to roll themselves up in the tube rather than be pushed through. I reckon that little job took half an hour and nearly resulted in the roof being flung across the room !
The “grain of wheat” bulbs in the lights are 3V, and I didn’t spot this until I had installed everything. Since the battery gives 8V I’ll need a dropper resistor to stop them frying. My physics was never good enough for this so I’ll use the same ones I use for dropping 12v down to power LED’s and hope that there is enough juice to light the bulbs.
The radar done is scratchbuilt and on the small side. I used the largest plastic tube from the local model shop and it’s still only ¾’s the size it should be. I’ll have to keep an eye out for a commercial replacement. It’s not worth buying big enough pipe as I only want about 10mm and will need to buy 6 feet !