"Stealth Pilot" wrote in message
...

I have a friend who has a fournier motorglider with the most unusual
tips.

it has quite solid cast aluminium holders top and bottom for
pyrotechnics canisters which would give off really dense white smoke.
they were like a military smoke grenade in that once ignited they
burnt until extinguished. they were about 8inches long and 2 inches
diameter and would burn for something like 10 minutes.

the guy who used to build these for fournier has died and it is
unknown whether his recipes have survived. The canisters are no longer
available commercially which is why we are trying to duplicate them..
one component was known to be a zinc compound and another possibly
finely divided aluminium powder.
they were electrically ignited and burnt with the intense white smoke.

does any pyrotechnics enthusiast out there have an idea as to what the
canister components would have been? or maybe a substitute recipe that
could be home brewed by intelligent bods for airshow use?
snip
Stealth Pilot

You might post to rec.pyrotechnics.