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Non Steam Discussions
Re: Boiler alternatives for a Stanley - 12 days ago
My friend Harry Card moved to Florida from New Hampshire after he retired as a machinist. He liked to build steamboats. He had patterns for a three-inch bore single cylinder engine and liked to build Ofeldt boilers. He had three or four big lathes and one was rigged only for winding the coils. He had taken a large pipe and welded ends on it for fitting the lathe. He had wound several layers of flaby Rolly - SteamStuff
Re: Boiler alternatives for a Stanley - 13 days ago
Burt The 10 inch drum should be at least Sch 80 A-106 Not code. For a working pressure of 600 PSI. For the drum to be Code it should be 3.5 times the working pressure. Closer to Sch 100. Pressure ratings of A-106 steel pipe https://www.engineeringtoolbox.com/a106-carbon-steel-pipes-d_370.html Just use the correct weld joints and plate thickness for the ends. Code requires five full tby Rolly - SteamStuff
Re: Boiler alternatives for a Stanley - 15 days ago
Your right Chuck it is not an easy task if you do not have the correct bender. Rod Teel SACA-NE built a beautiful bender that would do the job It has since been destroyed. Not sure how. The thing is that most guys don’t realize is there are pipe bending shops around that will sell the pipe all bent to order as cheap or cheaper then you can buy the pipe locally. Get the best price delivby Rolly - SteamStuff
Re: Boiler alternatives for a Stanley - 15 days ago
Burt Use the A106 seamless and ask for mill cirts when you buy it. Rollyby Rolly - SteamStuff
Re: Steam turbine driven turbojet - 30 days ago
Laminar verses turbulent flow Actually a firetube boiler the combustion gases are going through the tubes in a laminar flow, and because of the shape of the tube being rolled in at the tube sheet more or less a sharp edge this acts as a very poor venturi entrance. The gasses tend to confine themselves to the center of the tube and increase in speed as they travel up the tube. They only work bby Rolly - SteamStuff
Re: Steam turbine driven turbojet - 4 weeks ago
Laminar verses turbulent flow in more relevant to the flow of gasses thorough the tubing bank after leaving the combustion chamber. Raytheon in there extensive study on cooling radar tubes found that turbulent flow of gases around pipe or tube did four times more work then Laminar flow of gases. Heat radiates in all direction at the same speed of light in the combustion chamber. Wrapping the combuby Rolly - SteamStuff
Re: Steam turbine driven turbojet - 5 weeks ago
(At supercritical pressures water does not boil, just expands in volume with increasing temperatures.) Not true. All water in a boiler boils, there is always space above the water where the steam cushions the expansion creating pressure. If there were no steam and space the water would hydraulic and burst the pressure vessel with almost no heat, as water expands in volume very fast whenby Rolly - SteamStuff
Re: Dynamic Viscosity of Saturated Steam Fractions - 5 weeks ago
The Baker boiler is not a very easy boiler to duplicate but looks to be a very good steam generator. The center generating steam coil to the engine is actually two separate coils wound together. Not easy to do. I was thinking of making a model, but it would have to come apart or all you would see is what would appear to be is a coil of pipe. See attached. I know of one never used and still in tby Rolly - SteamStuff
Re: Dynamic Viscosity of Saturated Steam Fractions - 5 weeks ago
Ken try these sites Viscosity is a measure of a fluid's resistance to flow That’s going to be variable with steam dependent on temperature. https://wiki.anton-paar.com/us-en/water/ https://physics.info/viscosity/ Rollyby Rolly - SteamStuff
Re: Dynamic Viscosity of Saturated Steam Fractions - 5 weeks ago
Ken Good luck with it A forced circulation coil. It depends on the pipe ID, pressure, length and feedwater rate and back pressure and BTU applied. . We started to get into these calculations when I was studying Jet engines but they had me switch to rockets and a lot of this stuff you never seam to use. You just need to know where and how to find it. In your eighties do I need to know tby Rolly - SteamStuff
Re: Dynamic Viscosity of Saturated Steam Fractions - 5 weeks ago
I don't but this might help. Gas turbines second edition 2015 Dynamic Viscosity (VIS) and Reynolds Number (RE) (Formulae F19.9) Dynamic viscosity is used to calculate the Reynolds number, which reflects the ratio of momentum to viscous forces present in a fluid. The Reynolds number is used in many performance calculations, such as for disc windage, and has a second-order effect on componentby Rolly - SteamStuff
Re: Steam turbine driven turbojet - 6 weeks ago
I only worked on one nuclear reactor, it’s basically a tank of water with the reactor rods (core) inside the tank and a bank of circulating pumps around the tank circulating the water around the core in the middle of the tank. Each pump in a separate room with valves to isolate the pump for maintenance. The water in the reactor was circulated through a heat exchanger to generator steam so radioactby Rolly - SteamStuff
Re: need some advice on gears - 7 weeks ago
I’m around Jim Looking at them won’t solve the problem. Rollyby Rolly - SteamStuff
Re: need some advice on gears - 7 weeks ago
Is the problem the cast gears being to weak? Sure looks like it. Why are they off center? Is that the way it’s designed? Looks like you need harden steel gears. Rollyby Rolly - SteamStuff
Re: Steam turbine driven turbojet - 7 weeks ago
Thanks Ken Sounds interesting. Rollyby Rolly - SteamStuff
Re: Steam turbine driven turbojet - 7 weeks ago
Ken is there a viable LPR project under way, I nave not heard of it. Rollyby Rolly - SteamStuff
Re: Steam turbine driven turbojet - 7 weeks ago
I found the photos of the 16 inch Carling turbine I had you can see it’s size compared with the five gal bucket. Rollyby Rolly - SteamStuff
Re: Steam turbine driven turbojet - 8 weeks ago
Rick I seam to remember it being a sixteen inch wheel double turbine rows with a single stator in between. Like the one I had. They built a new housing and bearing assembly from aluminum. I remember coping photos but can’t seam to find them. I forgot how many nozzles they used. Mine had five with plugs in the casing for more. Rolly found some photos The car’s turbine layout was redeby Rolly - SteamStuff
Re: Steam turbine driven turbojet - 2 months ago
Ken the three power plants I worked on with steam turbines did not inject cylinder oil into the steam. They were all super critical steam plaints. 3600 and 4000 PSI’ The forth was nuclear, also no oil. I did one other plant with two 600 KW steam turbines at 4160, no oil in the steam. The only reason for oil injection in the steam is if the auxiliary equipment is piston steam operated. I did renby Rolly - SteamStuff
Re: Lane Steam Cars - 2 months ago
Arthur Eldredge SACA-NE Had a Lane Steam car for years, he got rear ended several years ago. Mark Herman wound up with the car and was restoring it. I’m not sure where it is today. http://www.hermancompany.com/markherman.html Rollyby Rolly - SteamStuff
Re: The Effect of Low Feedwater! - 3 months ago
It’s not a mater of drum verses coil type boilers so much as it is the over all design and components used. In 1998 the ASME lowered the design factors from four times operating pressure to three and one half times. Because material quality is so much better today. Why was not the safety valve large enough to handle the volume generated, Why was the water allowed to get so low. Why was there notby Rolly - SteamStuff
Re: seat wooden spindles, wood turning - 3 months ago
Ben If you have never used longleaf southern yellow pine, don’t confuse it with soft pine as most people know it. It’s dance and solid wood. I built my twenty-five foot steamboat from it. Heavy wood. Most of it is now is coming from old factory buildings being torn down, the wood for my boat came from one timber 30 inches by 24 inches by seventy feet long. There was one section between tendonby Rolly - SteamStuff
Re: seat wooden spindles, wood turning - 3 months ago
Rusty Maple is considered an inside wood, used for a lot of furniture. Very good hard wood for inside but is prone to rot from the inside out when used outside much like red oak. But today they make a lot of sealing epoxys. Total Boat Penetrating Epoxy is one, a wet epoxy that soaks deep into the wood, mostly used to repair rotten wood. These products are very good sealers for wood used outsiby Rolly - SteamStuff
Re: seat wooden spindles, wood turning - 3 months ago
Hickory is what axe handles are made from, very strong and will flex. Good outdoor wood. Much like white oak, closed cell. But there is nothing wrong with white ash, will flex well, a lot of tool handles are made from ash. Rollyby Rolly - SteamStuff
Re: Boiler alternatives for a Stanley - 3 months ago
There are several advantages. The fire tube of a Stanley, the heat (Hot gases) travel up the tube in Laminar flow staying mostly in the center of the tube relying on radiant transfer of the heat to the boundary layer of the tube and the top part of the tube is not covered with water. The external tube of the Ofeldt design allows turbulent flow of the gases to sounder the tube (much more efficby Rolly - SteamStuff
Re: Steam turbine driven turbojet - 3 months ago
Rick I use to set the throttle setting on the J33 jet engines used in some of our cruse missiles when I was at Cape Canaveral in 1959-60 We used ear protection, nothing like my pulse jet. But that’s not to say some pulse jets may run with less nose or a different frequency. I’m use to steam plants making very little nose. Rollyby Rolly - SteamStuff
Re: Steam turbine driven turbojet - 3 months ago
Rick Did you ever hear a Pulse jet run. It’s deafening. 65 years ago my brother and I built a five-foot long Pulse Jet engine. It had eight reed valves, and a three inch exhaust tube. Lots of heat, the whole thing turned cherry red before it ran out of fuel. You could not stand next to it or at least we could not. Rollyby Rolly - SteamStuff
Re: need some advice on gears - 3 months ago
Tooth failure on a gear is not un heard of but is rare. Most often it’s caused by something ales getting in there. Those gears most likely are off the shelf items in England. Any good gear and bearing shop hear may be able to get then in less then a week. On my EX the eccentric strap bearing cap came loose and the balls flew out, one landing in the gears between the engine and differential geaby Rolly - SteamStuff
Re: Full Steam Proposal for Auto Mfrs - 4 months ago
Years of ingrained thinking with IC. Rick That me. That’s why we also drive antiques. As well as Steam. 2016 I bought a new F150 natural aspirating V8 standard cab. I ordered it in the fall of 2014 for 2015 the first year the Aluminum body’s came out. They could not build it for 2015, they did not have body parts for the standard cab, I had to reorder it for 2016. They were really pushingby Rolly - SteamStuff