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2 answers

Smoke generators in the tailpipe (or mounted close to it). Just feed in a different mix for different color.

Remember Rambo: First Blood Part II? You can clearly see the smoke generator in the chopper cabin when he made it back to that "Thailand base".

2007-03-23 06:10:49 · answer #1 · answered by Kasey C 7 · 0 0

Easy as pie. Inject colors into the exhaust. Turn of injection to make the exhaust invisible.

2007-03-23 12:49:22 · answer #2 · answered by Leon 5 · 0 0

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