12/18/2023 0 Comments Thinkin things 1 browser![]() I did some engineering calculations to estimate the forces on the various components of the 1812 design. There is no other block in the slot to stop the slide from rotating on the skid shown on the drawings. The 1812 design just shows a 3.75" fighting bolt that runs in the slot and goes through a large (8" diameter) ring that runs under the base. There is 1/2" clearance between the bottom of the skid and the hook edge on the t-nut. Each t-nut is attached to the slide with four 1.25" bolts. The first drawing shows two wooden "t-nuts" that fit in the slot in the skid and hook under the skid. They provide two designs, one from the 1927-31 rebuild and another that is "1812 Era" (1985 drawing). I looked at the drawings for the carronades provided on the CD from the USS Constitution Museum. The designers of the guns probably never even saw one up close.and just thought that looks better without the wedge. Even a foot bridge collapsed under the weight of people because the builder moved two bolts. I've seen modern bolts 150mm snapped like twigs when the force was in the wrong direction. There is no way a small screw or even a large one. There was always a fault to prevent others just copying it. It could and probably was common practice to use a wedge just not put down in the instructions. To prevent the enemy suspecting we had a secret weapon, radar, the rumours went around that carrots were good for your eyesight. While it may not be documented until much later it may well be like the story of eating carrots during WWII. ![]() "I used to use something like that when I was a lad" I assume you mean 1900-2000(20th century) otherwise they would the same era as Victory. Wrought iron is renowned for being flexible that it's main benefit over cast.īut you say you've only seen wedges in 19th century replicas. Yet snapped a 100mm bar designed for the job. ![]() I once snapped an axel going at ten miles an hour because the verge I hit was solid ice. Look at cars and they are only one maybe two tons. Would bend like toffee when faced withe the weight of the barrel flying back at at least ten tons of force. I'm no physicist but I do know that an iron bar of even two inches 60 mm. Not being a physicist, I do not know enough about the stability of 18th century iron rod srews of about 2" (guessed by the proportion about 6 cm) and the forces of the shot pressing onto them. Fact is, as long as the screw is used, I just discovered the wedges only in 19th century replicas so far, and not in contemporary sources. Izzy: As I mentioned before, me too I wonder, if the screw was eased by a wedge while shooting or being lashed for sailing. If those side parts are missing, it is rather difficult to work the bars properly. Those steps served for the bars to have a leverage point. Jud: I believe the elevation screw was actually used to adapt the height, as all carriages using wedges and therefor bars have the sides of the carriage made of wood and with those typical steps as silhouette. Unless you can find a loop hole in all three of newtons laws of motion. Or else the same force that drives the back down would flip the barrel over. Either a removable spike through the pivot making it simpler to transport around deck if needed. But having spotted several words on the issue I feel that the gun be mounted I such a way that the pivot was able to slide but not able to rise. And if not in the plans surely a Wiley old sea dog would have realised this drawback and used something in his own redesigned version.īeing unable at the moment to actually read the entire thread due to my condition. At least digging into the wood at one side or the other. The bar would still bend if not embedding in the wrought iron plate. I'll cont here but I realise that there is a metal plate for the screw to slide on but with several tons of recoil that would be like putting a biscuit under a wobbly table leg.
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