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Rifling machine plans
"Jim Wilkins" on Sun, 24 Nov 2019 18:39:58
-0500 typed in rec.crafts.metalworking the following: Wow, so much loss for these poor guys! Then fame for Fulton rather than Fitch. That sucks. But we did have some very talented people in the USA. History is full of guy A inventing / discovering something "first" but guy B is the one who got the publicity. E.G., it is called "America" because the map maker called it after Americo Vespucci, for various reasons. -- pyotr filipivich "With Age comes Wisdom. Although far too often, Age travels alone." It's often A, B, C and D tinkering with the idea, then E making it practical after a different advance removes the last stumbling block. Steam transportation required stronger boilers, As I understand it. one of the critical features of steam engines (smooth round cylinders which allowed a tight fit) came as a result of development in the armaments trade: the ability to bore out cannon barrels. And so forth. airplanes needed lightweight engines. Although I have plans for a steam powered aeroplane. (circa 1908 iirc) In my own experience the Segway required solid-state gyros, and cell phones required A/D converters fast enough to digitize radio frequencies. I was building prototypes with digital storage scope components. I recall reading an article of a guy who made a processor using individual transistors soldered to circuit boards. There is a lot of "retro-" building where people are doing "by hand" as a hobby what is not practical to do commercially. I make wooden boxes, the wife crochets blankets. Nobody is going to pay for our time, the best we can hope for is to cover materials. "It is a hobby." -- pyotr filipivich "With Age comes Wisdom. Although far too often, Age travels alone." |
Rifling machine plans
On Mon, 25 Nov 2019 09:04:53 -0800
pyotr filipivich wrote: snip I make wooden boxes, the wife crochets blankets. Have you seen these puzzle boxes: https://en.wikipedia.org/wiki/Japanese_puzzle_box I have one like the first image an old acquaintance brought back from Japan after spending some time there. Very cool and they sell for a decent price. Relative crocheted custom table clothes when she was younger. They used sell for quite a bit. One in particular was $600 in the mid 1970's. I think they "earned" every bit of it though :) I'm guilty of repairing many items though that would never be profitable to do for pay... -- Leon Fisk Grand Rapids MI |
Rifling machine plans
"pyotr filipivich" wrote in message
... ... I recall reading an article of a guy who made a processor using individual transistors soldered to circuit boards. -- pyotr filipivich The Army taught me computer electronics at that RTL and DTL level in 1970. Flip-flops used tricky level shifting and diode steering to direct a capacitive clock pulse to turn off the base of the On transistor. Luckily I had learned DC and AC network analysis in college Physics classes. Later I got into the design of custom ICs, beginning with a DRAM controller for the digital signal processor in a color scanner. When I started as a lab tech at Unitrode my training assignment was to dissect an IC layer by layer with nitric acid and draw the schematic. I got all the current mirrors, gates, op amps and comparators right but couldn't decipher the innards of the voltage reference circuit. |
Rifling machine plans
Leon Fisk on Mon, 25 Nov 2019 13:27:37 -0400
typed in rec.crafts.metalworking the following: On Mon, 25 Nov 2019 09:04:53 -0800 pyotr filipivich wrote: snip I make wooden boxes, the wife crochets blankets. Have you seen these puzzle boxes: https://en.wikipedia.org/wiki/Japanese_puzzle_box I have one like the first image an old acquaintance brought back from Japan after spending some time there. Very cool and they sell for a decent price. Relative crocheted custom table clothes when she was younger. They used sell for quite a bit. One in particular was $600 in the mid 1970's. I think they "earned" every bit of it though :) IF you have the skill, sure. My skills aren't _that_ good. I'm guilty of repairing many items though that would never be profitable to do for pay... I've bought boxes, cabinets, and the like on the grounds "The hardware is more than they're asking for the whole thing!" -- pyotr filipivich "With Age comes Wisdom. Although far too often, Age travels alone." |
Rifling machine plans
"Jim Wilkins" wrote in message
... Wow, so much loss for these poor guys! Then fame for Fulton rather than Fitch. That sucks. But we did have some very talented people in the USA. History is full of guy A inventing / discovering something "first" but guy B is the one who got the publicity. E.G., it is called "America" because the map maker called it after Americo Vespucci, for various reasons. -- pyotr filipivich "With Age comes Wisdom. Although far too often, Age travels alone." It's often A, B, C and D tinkering with the idea, then E making it practical after a different advance removes the last stumbling block. Steam transportation required stronger boilers, airplanes needed lightweight engines. Here's a fine example of the protracted development of a promising but difficult idea into a practical product:: http://www.gutenberg.org/files/60794...-h/60794-h.htm "The reader has doubtless sensed a certain monotony in this review of the early typewriter inventions. “It did good work, but it was too slow,” is the formula which fits nearly all of them; certainly all of them that were able to write at all." |
Rifling machine plans
On Mon, 25 Nov 2019 09:04:53 -0800, pyotr filipivich
wrote: "Jim Wilkins" on Sun, 24 Nov 2019 18:39:58 -0500 typed in rec.crafts.metalworking the following: Wow, so much loss for these poor guys! Then fame for Fulton rather than Fitch. That sucks. But we did have some very talented people in the USA. History is full of guy A inventing / discovering something "first" but guy B is the one who got the publicity. E.G., it is called "America" because the map maker called it after Americo Vespucci, for various reasons. -- pyotr filipivich "With Age comes Wisdom. Although far too often, Age travels alone." It's often A, B, C and D tinkering with the idea, then E making it practical after a different advance removes the last stumbling block. Steam transportation required stronger boilers, As I understand it. one of the critical features of steam engines (smooth round cylinders which allowed a tight fit) came as a result of development in the armaments trade: the ability to bore out cannon barrels. And so forth. airplanes needed lightweight engines. Although I have plans for a steam powered aeroplane. (circa 1908 iirc) In my own experience the Segway required solid-state gyros, and cell phones required A/D converters fast enough to digitize radio frequencies. I was building prototypes with digital storage scope components. I recall reading an article of a guy who made a processor using individual transistors soldered to circuit boards. There is a lot of "retro-" building where people are doing "by hand" as a hobby what is not practical to do commercially. I make wooden boxes, the wife crochets blankets. Nobody is going to pay for our time, the best we can hope for is to cover materials. "It is a hobby." Quilters used to give away their hard work, too, but they found a marketing scheme which now sees quilts go for hundreds of dollars. Find your marketer, dude. -- There is nothing more frightening than ignorance in action. --Johann Wolfgang von Goethe |
Rifling machine plans
Larry Jaques on Fri, 29 Nov 2019
20:56:15 -0800 typed in rec.crafts.metalworking the following: In my own experience the Segway required solid-state gyros, and cell phones required A/D converters fast enough to digitize radio frequencies. I was building prototypes with digital storage scope components. I recall reading an article of a guy who made a processor using individual transistors soldered to circuit boards. There is a lot of "retro-" building where people are doing "by hand" as a hobby what is not practical to do commercially. I make wooden boxes, the wife crochets blankets. Nobody is going to pay for our time, the best we can hope for is to cover materials. "It is a hobby." Quilters used to give away their hard work, too, but they found a marketing scheme which now sees quilts go for hundreds of dollars. Find your marketer, dude. It is a possibility. BUT ... I went to tech school to learn machining, because woodworking was a hobby/relaxation. However, as I've said, "I hired this company to collect my pay from customers, oh, and to find customers, suppliers, and to handle the paperwork side of the business." -- pyotr filipivich "With Age comes Wisdom. Although far too often, Age travels alone." |
Rifling machine plans
On Mon, 25 Nov 2019 09:04:53 -0800, pyotr filipivich
wrote: Steam transportation required stronger boilers, As I understand it. one of the critical features of steam engines (smooth round cylinders which allowed a tight fit) came as a result of development in the armaments trade: the ability to bore out cannon barrels. And so forth. airplanes needed lightweight engines. Although I have plans for a steam powered aeroplane. (circa 1908 iirc) Go to YouTube for videos of the flight of the Bessler Steam Plane. Flew quite nicely. Gunner __ "Poor widdle Wudy...mentally ill, lies constantly, doesnt know who he is, or even what gender "he" is. No more pathetic creature has ever walked the earth. But...he is locked into a mental hospital for the safety of the public. Which is a very good thing." Asun rauhassa, valmistaudun sotaan. |
Rifling machine plans
On Mon, 25 Nov 2019 09:04:53 -0800, pyotr filipivich
wrote: As I understand it. one of the critical features of steam engines (smooth round cylinders which allowed a tight fit) came as a result of development in the armaments trade: the ability to bore out cannon barrels. And so forth. airplanes needed lightweight engines. Although I have plans for a steam powered aeroplane. (circa 1908 iirc) https://youtu.be/nw6NFmcnW-8 __ "Poor widdle Wudy...mentally ill, lies constantly, doesnt know who he is, or even what gender "he" is. No more pathetic creature has ever walked the earth. But...he is locked into a mental hospital for the safety of the public. Which is a very good thing." Asun rauhassa, valmistaudun sotaan. |
Rifling machine plans
"David Billington" wrote in message
... On 04/12/2019 14:26, Jim Wilkins wrote: "Gunner Asch" wrote in message ... On Mon, 25 Nov 2019 09:04:53 -0800, pyotr filipivich wrote: Steam transportation required stronger boilers, As I understand it. one of the critical features of steam engines (smooth round cylinders which allowed a tight fit) came as a result of development in the armaments trade: the ability to bore out cannon barrels. And so forth. airplanes needed lightweight engines. Although I have plans for a steam powered aeroplane. (circa 1908 iirc) Go to YouTube for videos of the flight of the Bessler Steam Plane. Flew quite nicely. Gunner Advances in material science enabled flash boilers to be light enough to fly, but the lower thermodynamic efficiency of water-based steam engines made them impractical due to higher fuel weight. Their only real advantage is that they can burn cheaper solid fuel such as wood or coal. https://en.wikipedia.org/wiki/Engine_efficiency " In effect, diesels ran six times as far as steamers utilizing fuel that cost only twice as much. This was due to the much better thermal efficiency of diesel engines compared to steam." Mass-produced gasoline aircraft engines reached 34% efficiency by recovering exhaust energy with turbines. Steam engines can only achieve that with bulky and fragile condensers that were never practical on locomotives, let alone aircraft. Also unlike ships and power plants there's no reliable water source to cool the condenser up there, and air condensers weren't the answer because the engine needs to be able to dissipate the most heat at takeoff in hot ground air. Without a condenser steam engine efficiency runs to 10% or less. Condensing steam locomotives were produced successfully and used in dry parts of the world where water was hard to come by https://en.wikipedia.org/wiki/Conden...eam_locomotive "The system was satisfactory for tram engines (which were very low-powered) but would not have worked for larger railway locomotives." http://cs.trains.com/trn/f/740/t/209...rt=ASC&pi332=2 "South African Railways was famous for its condensing 4-8-4's, which were built to support steam operation through a desert where water was unavailable. The condensing gear, which was mounted in the tender, had its own maintenance needs above and beyond that of the rest of the locomotive. SAR also had otherwise identical conventional 4-8-4's for service elsewhere, which implies that the condensing gear existed only for a special situation." Their disadvantages were tolerated when necessary to solve more serious problems. Somewhere I read that their maintenance was quite high, due partly to cracking from hammer blow. Your small loading gauge severely restricted what could be hung on the outside in the air flow. |
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