jud

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Everything posted by jud

  1. Many are a form of Quaker, or dummy. The ports being just cavities with the Quaker in place, some models have model guns in place. You will find a wide spectrum of materials and numerous rigging arrays. The answer for this one is, it depends, it depends on the modeler, his skills, available materials and the modelers wishes. jud
  2. Sounds like your math is right, your assumption that the 2013 publishing date was the copyright date or the date he completed the book probably is a poor assumption. Believe a little research might reveal when the book was copyrighted and a little more the date of death, I don' have enough interest in researching it for you, more intrested in peeling some spuds for hash browns. jud
  3. Welcome back. Revive the old, short explanation on the interlude if you wish, but not necessary. Things happen in life, we all know that. jud
  4. Have to admire the Auxiliary Fleet, they got little glory but worked about 24, 7s. GM 2, 7 years active. 4 year hitch + a 2 year hitch with a 1 year extension. Have a good one 'Boats'. jud
  5. Built the Revell Cutty in 64, only did the standing rigging, damaged during dusting and gave it away, not near the job you have done with yours, a keeper.. The Navy granted all of us at NTC San Diego weeks Christmas Leave in 1959 so spent Christmas leave at home. Company 537, orders to DD 527 after graduation, born on the 27th, lots of 7s . jud
  6. We have been able to get muzzle velocity up to and above 4000 ft/sec but at those speeds the bore erosion become excessive and the heat generated on the projectile can melt it like was happening with the 17 bee if loaded a little fast. Bore wear and rotating bands effectiveness is what limits maximum velocities at the bore, other projectile design factors will contribute to stability and down range retention of speed. Changing a gun tube is not usually done aboard ship, did change barrel's on the ready mount on the Harnett County, LST 821 because of wear, easy change, didn't even unload the loaders.
  7. Both Black and Smokeless powder produce gas to launch a projectile, we can put more potential energy into smaller packages of modern smokeless powder than we can using Black Powder but provided enough room we can place the same amount of potential energy in a gun tube using either mix. Using smokeless powder instead of Black powder, the advantage is mainly because the rate of burn can be controlled much better and slowing down that rate of burn allows smokeless powder to deliver an increasing power push against the projectile for the full length of the bore, Black powder is packed tight against the projectile because it is much closer to an explosion, its rate of burn and the packing prevents a void from being pressurized before the projectile begins to move, smokeless powder acts on the projectile like a compound bow does on an arrow, the push starts slow and increases with travel so a void does not create an over pressure point as the projectile begins movement. Pick up a Black Powder cartridge and shake it, you won't hear the powder moving inside the case like you often can in a smokeless cartridge, there are compressed loads produced today using smokeless powder so exceptions are out there. Anyway the energy released at the time the projectile leaves the bore can be equal using either powder, the speed of the projectile will be different, the forces with black powder peak sooner and the projectile acts more like shrapnel traveling down the bore than a projectile brought up to speed slowly and pushed out. The crack or womph is sound waves emitting from the blast, there can be some supersonic crack added from the projectile and hot gasses at the muzzle passing through the air but that projectile crack is added because of velocity not pressure. Does not matter the propellant type, hearing damage can happen even when using a high pressure air gun, pressure can build unheard, the release of that pressure is always forceful. Sound waves can be caused by any number of things creating potential damage to hearing, they don't need to be accompanied by blast to compromise your hearing. Keep in mind everything I have written is out of the memory banks, I did no research while making these posts. jud
  8. Pressure Wave, that is muzzle blast and you have it with BB guns, it is a measurable force. That blast alone can cause impact damage but it is damage caused by force, not sound waves which are directional and travel in sine type waves, the amplitude and length of sound waves can be measured and their frequency is then defined. I have observed muzzle blast blow loader covers off of 3" 50s, tear sound powered phone boxes and first aid boxes from the splinter shields. When you are on or next to the gun and attempt to record the sound all you will get is the splat from the blast forces as they impact the mike, that splat is blast effect, it overwhelms the sound waves acting on the mic., get well out of the blast area and you can then record the sound waves. Sound is detected by our ear drum being vibrated by sound waves, that vibration is detected by the nerve endings in the inner ear and we hear sound, different sound for different frequencies. Our ear drum is like a drum head or that microphone noted above, it can pass different frequencies or get blasted by the splat. That splat can cause pain or damage the membrane of the ear drum itself. What passes through the ear drum is what can damage the hearing nerves, it can happen with one episode or with an accumulation of repeated exposure. Muzzle Blast is accompanied with Sound Waves, blast can cause physical damage, sound waves typically pass by and through. Ears are designed to detect different sound wave frequencies and they all collectively feed information to our brains, when frequencies are lost, so is the ability to distinguish the finer subtleties in speech and bewilderment or request to repeat become irritating to the speaker and the listener. The hearing when lost is lost at the time of the incident, not years later, may be some exceptions to that but I know of none myself. My hearing was tested at above average in boot camp in 1959, in 68 at Cam Rahn Bay in 68 I had measurable high frequency hearing loss and was told that the ringing would never go away nor the lost frequencies return. I learned to read lips, avoid crowds or any other environment with background noise where I would be expected to interact with others. Had hearing aids only for the last 7 years, they help but do not replace the missing frequencies so my high frequency loss effect around background noise has not changed and I still need to watch you speak or I will be hearing some very strange comments coming from your mouth and spend some time attempting to figure out what you really said. No disability from the VA, although I just have started on the groundwork to make a claim. Two types of forces when working around guns, blast and strong sound waves. Each gun has different frequencies. Small arms, 40 MM, 3"50, 5" 38s and 8" 55 were the guns I was around, it was the 3" 50 and the 40 MM that did most of the damage. Was gun captain and had a headset over one ear and kept the other open to listen to the crew and loaders working, hours of this resulted in switching ears with the phone headset.
  9. Nice Turks Head on that anchor fluke, must have been some rib pain experience triggering it's being made and secured there. jud
  10. Was sent to the Air Force hospital at Cam Ranh Bay in 68. Watched a guy come out of the sound proof booth where he had had his hearing tested and boy did he get an *** chewing. I was sitting there thinking, I'm next. The first words that were directed at me as I was exiting that booth was a statement about having been around a lot of jet aircraft. I hadn't, just guns, same frequencies were lost as those on your flight lines apparently. jud
  11. In 59-60 the US Navy Recruit Depot in San Diego was still teaching how to handle a whaleboat under oars.
  12. Sounds bad to some of us, but when you think about what is normal at the time, that's life and few or any felt sorry for themselves. I don't feel sorry for the seamen of old because of the conditions and the times they lived, they were a tough bunch. Gunfire topside is hard on your ears, an explosion within a confined space also hurts eardrums but explosions in confined spaces destroy ships and were avoided. Gun muzzles were outboard when the gun was fired and the blast wave went outboard. Does concussion from guns harm hearing, yep, I wear two hearing aids, they help a little but some frequencies are gone and no hearing aid in the world can bring those frequencies back, perhaps a vibration device implanted in bone could, but don't expect the VA to pay for such an operation. Suspect that there was more hearing damage done on the weather decks than on the gun decks under normal conditions.
  13. Bought 100 feet of 1/4" cotton rope, tied a 8 turn Monkey Fist on the end, 'took 8 turns to cover the dog chew ball in the core', Drying now from washing and bleaching, be stretching it later. Plan on making it up and hanging on the wall for a decoration. Everyone needs to have a Heaving Line hanging on the wall. No squeaker in the ball, it's a stealth Heaving Line. jud
  14. Balance, good handhold, also a good place to lash rigging to while moving or securing the gun and Uncle Carly tied his teeth to them while sleeping, being a good fiddle player, allowances were made for him. jud
  15. A quick look also answered a long standing question about Wales. The recovered and photographed hull sections show that the Wales were beveled so they could slide off of the wales of another ship, docking structure or whatever they might encounter. Shows me that instincts were right about the edge shape of these important hull protectors. Thanks for the link. jud
  16. Having started out using an IBM 1130 in the early 70's with it's hard drive being about 14" X 3". We kept our files on key punch cards, a Fortran COGO program was what we used for Surveying applications and had tons of key punch cards stored in the basement. The only records useful today are the field notes and printouts we poked in a file and indexed in a file cabinet or the original drawings filed in the County records. In other words, printed hard copies, not digitizing is where you store data you may wish to use again. Were it me I would obtain a good scan and print it out full size on mylar and then spray with a fix-it and store the sheets in a flat file of some sort. You can use your digitized scan to print as many paper copies as you wish, stored they will keep a long time but get brittle. The mylar is considered archival-able in this state for records, if etching ink has been used. It is that ink that is hard to find in use, unless you go to a surveying or engineering firm that produces archival-able drawings for recording in a public record. The mylar is tough and stable and unless abused you can make prints from it or scan it into new technology for a very long time. jud
  17. Nice models. Don't see riding or damper sails on models Like shown on GRE 19, she is rigged for both. Thanks for the photos.
  18. Capstans are devices to put a strain and hold that strain on a line. With Fair leads and Blocks a line can be lead to the Capstan from anywhere on the ship, up and down decks, forward or aft or in the rigging. Would expect may things were moved by capstans, probably some strange things like gun barrels. Rode a Caribue to an Army base out of Sigon, walked down the road to a PBR Base then two different PBR's to my new duty station LST 821. Long day and sure was glad to tie up to the boat boom, climb aboard and haul my sea bag up on deck, that is when I was ambushed. Go to Mount 41, leave your stuff here it will be fine but get up there now. There had been a fire support mission that morning and the left gun on mount 41 was wedged out of battery by it's extractor pin. That was not a common problem and that gun did not come with jacking gear to jack it out of battery against the recoil spring, the Captain wanted his gun repaired and told the Gun Boss to stay on the gun until it was, now I became part of the sad crew who did not know what to do. Didn't take me long to rig the Capstan through some fair leads and blocks with a mooring line to that gun barrel, less than an eight of an inch freed the pin, let the gun back into battery, repairs were made in time for chow. Need something pulled, don't forget the capstan, no matter where the damn thing is, this one was on the port Bow, LST's only had one anchor forward, had another aft attached to a windless, part of the beaching gear. jud
  19. Might suggest that the thwarts be sealed on the underside as is the exposed side. Reasoning being to stabilize from moisture changes and to create a flat I beam by having the web separating two stiff flanges resisting any bending from time and weight. Double coat if it does not detract from the desired finish. Like the Davit fabrication. jud
  20. druxey, we had about a mile of pole fencing around the ranch buildings when I was a kid. I was in school when the lodge poles were cut and hauled down to the ranch, they were 20-25+ a few 35-40 footers used for posts. I did get to take them the from the stack and place them on saw horses to peal them with a draw knife, I was about 12 and it took me most of the summer to peal all of them. When pealed I stacked them alternating ends to keep the stack level and used stickers so they would dry straight. That fall and winter the fences were built, was in school so missed most of the building. I weighed much less than 100 pounds when I pealed those poles, went in the Navy at 17 at 105 pounds, gained 20 pounds in boot camp and another 10 aboard the Ammen. Lodge pole uncured, is heavy, If I could handle it, the sailors of old accustomed to manual labor would have been well able to handle those sweeps.
  21. Don't know how it was done but a very simple method would be to store the sweeps on the weather deck using dedicated racks. When needed, pass ropes out of the forward sweep ports, one on each side, grab them with a hook and bring the ends on board to secure to the inboard end of a sweep at the rail and toss the whole thing overboard and let the, 'sweep-man or whatever he might be labeled', haul his sweep in through its port, untie and pass the rope back to the next station and repeat. Reverse, to return the sweeps to storage. Why make a simple evolution difficult? jud
  22. Finally broke down and bought an auto darken welding helmet, still strike an arc using braille but not so good with the wire feed Mig so it has sat while 1/16" rods have been used, therby increasing my experience in filling blown holes. Warm up a bit and the wire feed will be brought out. jud
  23. That is a trough in my feeble vocabulary, but you and the sketch are welcome to refer to it as a saucer, kept greased so as the screw was rotated the lower end of the screw riding in it would move and relieve the bending moment caused by the rigid screw rotating around the trunnions, which in this sketch are at the C/L of the 9" rifled bore. The earlier carronades unlike the cannonades rotated around a rigid pin through a loop cast into the gun far below the bore. It is the modeling and displays of such guns that close inspection reveal that, as depicted, keeping guns in action as so depicted would be a problem. The guns were used, the screw devices were used, historical fact as is the fact that the laws of Psychics must be obeyed, the only assumption that can be made as we see in the displays to date on this site is that something is missing in the attempts to show actual practice. Rifled guns and better steels put a short life for heavy cast muzzle loaders and as alloys improved, breach loaders became lighter forcing screw elevation gear to quickly became an interesting footnote in history. Attempting to use the 1865 screw elevation technology with 1820 carronades would result in something like putting a Knuckle Head Engine on a 2 wheel high ride bicycle, get the thrill of the first bit of motion, then the crash. The search here is for reality, not denial that screws were used, only how. jud Interesting, ' Sweep Piece', have been wondering where they were in all the drawings and models I have seen. When I asked, the response was a bit insulting for me to wonder how preventable damage to the ships inner hull would have been important enough to take steps to prevent it. I expect that steps were always taken to keep the gun, it's carriage and wheels away from the inner bulwarks. Little off subject complaining over with, I feel better now.