Hi,
My idea too; a canon that doesn't fire.... Reminds me of something else: how do you call a boomerang that doesn't return? (a stick)
I've been toying with the idea of building a naval-type gun (Verbruggen-design, about 1740), with oak carriage. So many plans, so little time... :-( ACAD-plans for the bore are finished though.
Anyway, drilling a bore should be possible; should you be interested, I've graduated on the subject of deephole-drilling (aka. gundrilling). My thesis can be found here (directly):
http://a_viktor.tripod.com/PeterThesisWriter.pdf
or here:
http://gundrilling.tripod.com
(goto DHM information)
Nice research topic, even toyed with doing a Ph.D. on the subject. Amazing how little theoretical knowledge there is on this subject.
Anyway, good luck with your engineering course (I hope they give you more 'practice' than over here, where it's mostly theory; e.g., art-class students know more about welding than I learned at the HTS (mechanical engineering school, one degree below university, i.e. B.Sc.)
Grtz,
Peter.