18 pounder culverin Published December 26, 2012 at 2100 × 1787 in The HMS Bounty And The Blockbuster That Was Never Made drawing for 18 pounder cannon tubes. At over 9 feet long, these were even shorter than the largest guns. 18 pounder culverin drawing by R.D. Wilkins Share this:PrintMoreEmailLike this:Like Loading...