Sir,
I have seen model planes emitting coloured smoke from wing tips . How it is done . I want to know in detail the about The colour smoke . Can any body help ?
Uday Malse

The colored smoke is from mini smoke flares. You light them and they burn until they are expended, appx $4 each flare.

Dido on what FHHuber said. The flares are basically little canisters that burn colored tar. They make quite a mess on a plane if the tar gets on it.