Taillights, if you replace the plastic wheels with metal ones and put a contact strip in, it should be easy. Use a decoder to turn them on and off at will.
If I use a decoder that's meant to operate points (because it's just on and off and not anywhere in between) would it effect the numbers of trains that I can run? (because I'm extremely limited on how many trains I can run at the same time)
Unless you got a booster (get the one that's 8 amps!), yes, it will draw current and will lower the total number of trains you can run without an overload.
I had found new model planes on the internet which have a ratio of about 1:500 Dad says that it's 1/2 a meter tall (which I think it's too big for my oo gage trains).
I am curious if it's about 50cm all.
So I would like to gather thoughts about how big 1:500 in CMs.
1:500 would be Japan's new smaller-than-Z scale (I think). If you have OO scale...you'd be having your model people running model trains of their own with this stuff!
I'm just starting on my model railway, albeit it in HO (With some 00 mixed in though) set in Aus, but they have been very helpful so far.
1:500 is very small. This can also be read as 1/500 (Or 1 devided into 500), which can equate to 1m divided into 500, which equals 2mm. So on the diagrams, 2mm would represent 1m