Although I have been building small organs and making pipes as
an amateur for many years, until now I have fought shy of making a
trumpet rank.  Now, with some guidance from Marc Elbasani's excellent
description published via MMD, I have partially completed a 25-note
rank of trumpets, spanning two octaves from middle C upwards.  In doing
so I have learned a lot, and had a few surprises too.  Reeds really
don't respond in the way I always imagined they did, and the resonators
make all the difference in the world!

The boots, reeds and shalots now work well with makeshift square-section
wooden resonators, but I should really like to make some cylindrical
tapered horns, ending with trumpet mouths, if possible.  I know this is
quite ambitious, but it is certainly worth a try.

Is there someone among the many MMDers who has some experience of
making trumpet horns?  How do I calculate their correct lengths or
perhaps there is some way of adjusting their length when in place?
Should I form them from spotted pipe-metal or is brass sheet not too
difficult to work when spinning the bell ends?

I would certainly appreciate some help with these and other questions,
please.

Bob Essex
Warwickshire, England