A few years back i made a smaller smoke bomb for my RC plane, since we fly electric planes and not glow, this is the way to create smoke for your RC plane.

1. You can simply purchase smoke cartridges ready to be mounted on your electric plane.  You will need a fuse to get it started. Fuse can be purchased from skylighter.com and smoke cartridges can be purchased from labsafety.com

Smoke Cartridges rc plane electric

These Smoke Cartridges identify leaks or check airflow in hoods ducts or rooms and can burn up to 3 minutes with a great white thick smoke, perfect to plant on your RC plane and create a smoking effect.

I on the other hand like to make my own smoke bombs using simple house hold items and they are:

-sugar
-baking soda
-potassium nitrate (KNO3)
-organic powdered dye ( if you want your smoke to be colored)
-you will need a fuse to light the final cartridge

here is a video of how to make a home made smoke bomb

here is my home made rc plane on a home made smoke bomb, mixture was not great so smoke was not thick.
Yak Foam RC Remote Control Plane Homemade with Smoke