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Steam related discussions.
Re: Gone Fish'n - 8 years ago
Steam is actually 2 cycle instead of 4 cycle... At the same time,some of the work that I have done with turbines might come into play when you need to change the power head.( A 25hp model jet turboprop converted to steam...the sweet spot for max output is 6500rpm at full load with the never exceed speed being 19000rpm. So you would need a 3:1 redrive on a power head about the size of football aby Arnold Walker - Miscellaneous Technical
Re: Propane as working fluid? - 8 years ago
As off the wall as it might sound some of the old timers, that knew a thing or too about combined cycle boilers ,could use a gas engine (probalbly air cooled to reduce complex-ness and SUV for ground clearance ) have the boiler in tailpipe, get emision control system government /industry seems to be having probems with getting right in almost 60 years.Get that complete combustion they were lookingby Arnold Walker - SteamStuff
Re: Propane as working fluid? - 8 years ago
If someone was going to do what was talking about a monotube in the exhaust on a diesel...you could do something on that order with aircooled gas engine.I am hard press to think of a steamer that never vacuum drafted the exhaust( or on the gas engine vacuum drafted cooling fins with exhaust pressure).by Arnold Walker - SteamStuff
Re: Propane as working fluid? - 8 years ago
Also at the time, naptha was in the stores as paint thinner at the time.When Mercedes among other were whipping up gas and diesel engines.Gasoline was the waste material for the most part at refinery operations.Pretty much unreliable and in short supply as fuel, as it changed from batch to batch....napha,hextane,etc. was going to burn the same in your engine everytime.Until the standards guys gotby Arnold Walker - SteamStuff
Re: Propane as working fluid? - 8 years ago
Kalina coming into play on what you are talking with propane working fluid,at risk of over simple answer. Kalina is ammonia refrigeration with an expander replacing the cooling coil.And modified gas turbine is often used in place of what a lot folks would use for for steam turbine.. Both propane and ammonia are better than freon on power production numbers....with kalina outside of geothermo yoby Arnold Walker - SteamStuff
Re: Insulating an engine from the inside - 8 years ago
The only problem I can see with air ..is like the difference between Stirling and Steam engines... When I time the engine,I usually am running a few degrees different between the two to get the same performance. For example air 250 PSI is 500F.,35O PSI is 900F...guess you already know what temperature steam is at those pressures. Working on gas turbines and jets as mechanic,many times in earlyby Arnold Walker - SteamStuff
Re: Storeroom going digital code storage as well as paper - 8 years ago
The academics that worked up SLS werer. Carl Deckard and Dr. Joe Beaman at UT in Austin using DOD DARPA grant, back in the 80's.There have been many improvements since it went into commericalization. And IronChief is right about about the accurate it was until new patents were done this year... On the ceramics during the earlier times it was only good enough for like artist decorations at the cby Arnold Walker - SteamStuff
Re: Storeroom going digital code storage as well as paper - 8 years ago
Rolly on 3d printing ,they literally has plastic that fakes wax for lost wax,another plastic that fakes wood for sand casting,and on metal molds mostly aluminium molds for soft metals and injection molds used for plastic industry. I imagine what you are talking on molds is a good start..got to crawl before you walk on tech. curve. In time,you work on 3d printing in 15 metals/ceramics starting wiby Arnold Walker - SteamStuff
Re: Storeroom going digital code storage as well as paper - 8 years ago
"Count me among them!!--but I'm still willing and capable of absorbing new technologies even at my age." That that phrase kept ringing in my head and can't place why...then it hit me,10 years ago.When the crazy helicopter mechanic started talking about steam turbines ...even though everybody knew you can't get reasonable effeiency out of anything under 200hp as general census.Two membeby Arnold Walker - SteamStuff
Re: Storeroom going digital code storage as well as paper - 8 years ago
Bill,those aging seniors are very reason we need to preserve some of the material that is dieing with them.If anything maybe some of the younger members need do to a computer version of dragging out a pencil and paper.While are still with us,instead of like Besler,Doble,White,and ? And in part some of having a liberary which members are to do more and better research....instead the left hand notby Arnold Walker - SteamStuff
Storeroom going digital code storage as well as paper - 8 years ago
I have been following 3D printing Quickparts and thought maybe when a member donated a drawing of it couldbe like the cloud based sharing on designer user site they. If so,(to keep from picking on anybody assume Steam bucket Joe had a part worth saving in the store),in addition to the shop drawings and he would add G-code from the Smithy CNC machinecenter and plasma cutter used to make that awesoby Arnold Walker - SteamStuff
Re: Flintstone cell phone - 8 years ago
You must be young,cell replaced trunked mobile phones. In those days,you had a phone tranciever the size of a footlocker.... Like many things in that time they had tubes as well....So your CB was was the size of a makeup bag. The commerical radio on a cop or company car was box that looked like a large rod box on a boat running the entire width of the car and about foot in diameter.Because of tby Arnold Walker - Miscellaneous Technical
Re: Aluminum foam sandwich (AFS) - 8 years ago
Sound like something can be done in laser sintered 3D printer.....that is usually used for printing metal and ceramic parts.by Arnold Walker - SteamStuff
Re: low pressure lamont - 8 years ago
Your remarks are also mirrored with geothermo folks who are working on Kalina among other means to get usable power...for temperature consideration. On low pressure,you would to go to something with a lot more flow than a piston engine...part of the reason you see modifed gas turbine/turbochargers used in many cases.(most turbochargers power wheels are maxed out at 30 psi, on gas turbines smby Arnold Walker - SteamStuff
Re: Insulating an engine from the inside - 8 years ago
Some of the Hot Rodders with a powder coat machine and good electric cooking range use Cerakote C-7300 Black Velvet to do the same thing on piston crown,headers,etc.......The stuff goes on like regular powder at about 15,000 volt static cling and bakes for about 15 minutes at 400F. Once on a part, can be at 1900+ F and if you touch the other side you feel about 132-200F. to the touch. Beenby Arnold Walker - SteamStuff
Re: low pressure lamont - 8 years ago
Rolly,have you ever seen the British mostly monotube model guys at places like www.flysteam.co.uk/steaming.htm. You can also see some of thier industrial software/hardware controler designs on International Steamboat Society. The guys are out there to the point of having you wonder if they have an electrical engineer building the stuff that they do on thier work bench.Was wondering if the Britiby Arnold Walker - SteamStuff
Re: Gone Fish'n - 8 years ago
I like reading your fishing dairy if for no reason,than about the only steamers I see fishing,instead of tourboating are some of the New Orlandes and Texas.Old school shrimp boats.Probably about 1 in at least 500 boats out there. In Catfishing,I fished over 30years and am about the only steamboater that I know. Because of the bait and live well tanks, you need a fairly large boat that can run inby Arnold Walker - Miscellaneous Technical
Re: low pressure lamont - 8 years ago
Jim agreed with you on the Yarrow ...they have some serious thermo-siphon action for heat transfer...Caleb seems to touched on what I was saying about the thermo siphon.... Me,I actually have better luck plugging my(steam) gas turbines in on a victorian era piston in turbo compound (the turbine and all is about 1/3 the physical size of the piston engine while delivery is right at double the horsby Arnold Walker - SteamStuff
Re: low pressure lamont - 8 years ago
Jim,I think you are spot on with the Yarrow being better for low pressure... At the same time,on combined cycle many of gas and diesel engine ..ended up being a morphed Lamont.With the cooling system using the original water pump to pre heat at about 10psi.And a vaccum ejector on the 200 psi monotube on exhaust side purging and mixing with the vapor for 65psi superheated in gas turbine setup, likby Arnold Walker - SteamStuff