shiloh

Don't believe that type of pump was used to build pressure to fight fire, maybe used to fill a bucket. It would take 3 or more of those pumps ganged with very well kept seals and valves to build pressure and hold in a pressure tank to do that. It does not look like original equipment. If being used to pump from a cask of water, the cask would need to be vented or open. Years ago my brother and I were charged with filling the shower for the harvest crew. That was where I now live, but not then. The old homestead house was here but no pressurized water. Water flowed from an artisan spring, down a ditch to a horse trough, drinking water was caught at the spring and never reached the ditch. The old hand pump was mounted on the side of the trough and we used it to fill buckets that we carried up a ladder to a 55 gallon drum. Done in the early morning so the sun would heat the shower water, a valve and shower head, wooden deck and curtains completed the water works. jud

Chafing at the block? jud

Could all of that been used as a vent for the pump and provide for a head, so air is not spitting out at the hose bib. Might also been used to prime the pump? Real frustration to find the priming water gone, when needing drink. jud

Have never used the Spine command in General Cad, I do use the Bezier. If I am working with spiral transition curves, I do the line work in Traverse PC. That way I can use the defined data for the Spirals in and out along with the connecting circular curve to match the record. The Spine command does look like the one to use with offsets on a hull, thinking that using Traverse PC to obtain the XYZ coordinates from offsets, then taking that into Cad, might be a good match. Been looking for some plans to try that combination on. jud

You might design a ship with several cross sections using circular curves that can be described using chord segments and radius having the PT and PC's tangent but every cross section between them would be transition spirals, 'constantly changing radius'. Spirals are hard to work with, we used to stake C/L using offsets from the back tangent, for the described C/L curves.Then to stake the edge of pavement or ROW we needed to do so from that marked spiral center line and go perpendicular the needed distance to be truly parallel, parallel spirals do not exist on the same plane, your computer will compute one that is close but not truly parallel. Ships tend to be made up with constantly changing radius curves in all directions, you can draw the horizontal segments of the hull from the keel up or in the other direction to the shape you need, then create the needed cross sections to obtain the shape of the ribs, don't believe it is done the other way around. There are people on this board who design vessels for a living, I don't, but as a Registered Land Surveyor I have worked with curves. Route Location and Design by Hickerson will probably explain all you will ever want to know about curves and provide the tables that will make it easier to work with them, remember this work was done before computers, my copy is the 5th addition, copyright renewal 1964, 'Library of Congress Card Number 99-25479'. Math and Geometry does not change. jud

Fittings intended to pass ammo through or hoists are made of brass or aluminum, at least on the Helena, not so much where fixed ammo was handled but semi fixed ammo handling rooms and hoists were fairly well spark proof ed. The spaces where bag powder was handled, spark making material was not allowed, even the tools in those spaces were aluminum or bronze. Might interest some, that the bag guns had a series of flames for their ignition systems. First was a 45 70 cartridge, 'looked like a blank or the line throwing gun cartridge', which sent a flame down through the mushroom stem into the black powder pad sewn onto the end of every bag of powder. That black powder is what set off the smokeless powder and was the compound that made handling powder bags dangerous. In the gun rooms water tanks were kept to dump the bags into during an emergency. You can bet that those brass hatches were a route for black powder cartridges to be passed through. jud

Don't know, but the pump handles would be out of the way and if the pumps were needed, those doing the pumping would not be interfering with the other things going on around them. jud

If you haven't glued those pumps in yet, might think about the handles being inboard and stowed with the handles up, out of harms way. No reference but were I placing the real pumps, that is how I would do it. You are doing great on this model, when I start the same build I will be following your steps closely. jud

Laser is 2D cutter, CNC is a 3D device. Plasma or water jet are also 2D cutters, unsuited for wood kit parts, now steel or... jud

Looks like I need to expand my above post to make it clear, that I was not suggesting tapering the thread instead of using the glue, my intent was to add that step before gluing the whole taper.. The taper might make life easier when threading very small holes or perhaps small blocks. jud

When threading a sewing needle for sewing leather I was taught to lay the end of the thread out on a surface, one hand holding the thread and the other using the cutting edge of a sharp knife, held perpendicular to the thread, to scrape the last 2 inches into a tapered point. Might try that before using the glue to stiffen the thread at the point. jud

I have 3 different sizes of Head Knifes. Have used them on thin wood placed on a mat, but I have them to cut leather. Have seen those rotating blades advertized, the pizza cutter we have that is a similar design but larger blade works fine. With the head knife you could make straight cuts, circular cuts or sharp angle cuts easily. Might be worth looking at. jud

Never can be to much detail, if done well. Scale and skill will control the well part of the eqation. jud

Thanks, a lot of answers in Mr. Muller's work. Seems that the terms he used in the days of smooth bores, fits well with modern rifled pieces. Wonder if smooth bores will again become the norm using finned sabo equiped projectials, certintly allows for greater muzzle velocity. Don't believe that guns are dead, their future will be in throwing projectials using other ways than expanding hot gas. Kind of glad that I have experienced the smell of gunpowder. jud

Called the one parked at 9.795N, 115.856E home in 67 and 68. jud

What I was pointing out is that a 3"50 gun can have a 150" bore, yet the gun tube be 200". jud

There is Caliber and then there are Calibers. Caliber is a measurement of the bore diameter and Calibers is the length of the bore, 'not the length of the gun'. The 3" 50, 5" 38 and 8" 55 are just a few of many, but I mention them because I have experience with them. There are many other sizes of guns, the caliber and calibers can tell a lot of information about them. That way of designating naval guns has came down through history at least up to the 5"54 which swere showing up just before I left active service in the Navy. jud

Baffel perhaps.