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  1. The quoin is wedge shaped. When pushed to the front of the the carriage it is taller under the breech ring, than when drawn to the rear of the carriage. When removed the breech ring would sit on the carriage bed, and (at least for lower deck ports with portcovers) the muzzle should then rest on the upper portsill so that the gun can be securely lashed in place with the port closed. When levelled the gun should be slightly below the mid point of the port (such that the available elevation is around 2x above as below (at least for late C18th and C19th ships (the ports were often sized small
  2. Cyphered planks is something I know only from a phrase 'flush beaded or cyphered planks' for the normal 'ceiled' walls of a Parish church vestry - the wooden cladding of a plastered stone wall, to around waist level. It is distinct from an alternative finish for the same 'beaded planks' - which I presume to have a prominent 'beading' rather than a flush treatment. More specific details I don't know. Harris cut is a style of glass engraving (characterised by curved lines meeting as a pointed arch, and crossing adjacent pairs) - often seen in drinking glasses. Look up examples and conside
  3. Yes, that looks about a proper proportion, with the 16 gundeck beams looking to be a significantly heavier scantling, and the 18 upper deck beams being lighter.
  4. IMO you have an (unarmed, enclosed) Gundeck, and an (armed, exposed) upper deck. As this is a Britsh HMAV. I am surprised that there are only 2/3 beams for these full length decks, and that sounds wrong. (Though as there may be a platform listed for the area of cabins (adding a few extra inches of cabin height by 'stealing' from the gun room below at the aft end of the Gundeck, or perhaps forward where the deck is rounded down to allow the cable to run fair from the Hawse Holes). The 14 might also be reasonable for the QD/Fo'csle, or where there are alternative treatments around open
  5. I would expect (but practice can vary) that the marked items are an Orlop Platform, The Gundeck and the Upper Deck/Weatherdeck. British ships with a full deck at or above the waterline tend to have this deck named Gundeck - this can be armed (as with ships of the line), when the lower gundeck portsills are quite close to the water, or unarmed, with the guns carried on the deck above *usually a weather deck* - as with Frigates and Ship sloops. Purchased ships might differ from purpose built HMAV, but I would look them up following this scheme at first, only changing to another schema if th
  6. I don't have to hand the scaling for His Majesty's Armed Vessel Bounty, but the equivalent for French service has the Ensign at Beam by 2/3 Beam. This should scale to around 123mm by 82mm (Not saying this is *the* correct size for a vessel in the service of His Brittanic Majesty, but your issued ensign is not larger than the Ensigns flown at the stern of foreign vessels and looks to be not unreasonable). The smaller Ensigns are also carried and can be flown instead if the wind conditions indicate reduced canvas is appropriate (or if the ensign is lost to storm or battle damage, to replace
  7. Most of them appear to be two part side opening or two part lower hinged, upper removable portlids - at least for the ones where it is identifiable what is going on. See for example the ports under the fo'clse on the above model (side hinges).
  8. Essex, at 87ft long carried at least 5 boats - she had three in the water (having lost 2 when knocked down by the squall, soon after setting off). One of the remaining 3 had been damaged while hunting, and was on deck when the Essex was damaged, with the other two in the water, returning to find Essex in a sinking condition (she remains afloat for at least 2 days, but swamped and on her side). While she is a whaler, rather than an exploration/survey vessel, the use of a small ship or brig to safely deliver boats for the proper business to be done, is similar in principle.
  9. According to Steel, British masting was based on "half the lower deck plus beam" at least in the period close to his writing... rather than on the keel.
  10. Boudriot clearly indicates a 'round' taper for the French practice in the 74 Gun Ship. I see no reason to use a linear taper for the reasons given above.
  11. The gun *starts* immediately, increasing it's velocity as the ball is driven along the bore... the maximum doesn't develop until some time after the muzzle exit because of the influence of the powder solids and gasses ejected with the shot and for some time after, but recoil is on the order of an inch during the travel for a 32lb gun of 9.5ft For almost all purposes this can be neglected - but it is incorrect to apply the recoil as an impulse applied all at once after the shot is expelled - the acceleration is high - around 32g average during the shot travel, but this is not of a high dur
  12. While making no comment on gunnery practice, I note only that the recoil velocity of a gun firing single shot with maximum charge is *initially* less than 14ft per second (42lb gun of 65cwt, at 1463 fps, with a recoil augmented by windage losses and powder by around 40% - calculations according to the French "Aide Memoire d'Artillerie Navale"). This is immediately moderated by 'picking up' the carriage by a few ft/s (a reason that light carriages and heavy guns were preferred for naval use - the same momentum causes lower gun motion, and less stress on the carriage). Smaller bore guns are more
  13. The "usual" replacement schedule was 4 calibres larger than the gun. So: 12lb carronade stand with or instead of 3lb guns 18lb carronade 4lb gun 24lb carronade 6lb gun 32lb carronade 9lb gun 42lb carronade 12lb gun 68lb carronade 18lb gun At distance, carronades perform as if they were guns of around 1 calibre smaller than they are for penetration (32lb carronade ~ 24lb gun), but 32lb carronades are roughly the performance of 4lb guns for range. Closer in, guns penetrate more, but tend to fire at a lower arc, and have a shorter distance for their line of metal. Eleva
  14. More, the English 8" carronades (not shell guns) fired a 7.92/7.925" shot of 68lb nominal weight, or a 56 lb hollow shot (boulet creux in the French style). (A 56lb shot could be referred, but I don't know how common this lighter shot was this early, it taking considerably more processes to accurately form a hollow shot). The (later) shell guns fired only the hollow shot or one of several designs of shell/bombe/shrapnel, while the coastal guns fired both hollow and solid shot, but ranged further with the heavier ball. The 64lb gun was a RML rather than a smoothbore either as a new cons
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