My Father is building a 1/8 scale live steam locomotive and it needs a headlight.
I am coming here to the CandlePowerFourms as you are the EXPERTS!!!
Here is a photo of the prototype with her tender.
Note how small the headlamp housing is compared to the locomotive.
I need about the light output of an automobile low beam headlamp with an even throw.
The prototype had a steam powered dynamo but I don't think our manufacturing skills are up to building a scale generator so the headlamp will need to be ran off of batteries that we might be able to hide in the tender or the first car in the train as I don't think there will be a cool enough spot on the engine for the batteries.
The front of the engine right behind the headlight is the front of the smoke box, so it will be a hot surface.... I will try to see if we can insulate it but I am concerned about heat dissipation for the headlamp.....
I would like to have a 12V battery as it would serve double duty as a engine starting draft fan power supply.
I would like to get eight hours or more of run time from the headlight.
I don't have the scale drawing for the headlamp housing yet but I should get it in under two weeks. I am guessing that the headlamp will be 1 to 1.5" in diameter.
What do you think my options are????? I am guessing that an LED will have to be my source as a halogen bulb would consume too much power for the light output. I am assuming there is not a small enough HID lamp on the market.
Thanks in advance.