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Re: Uniflow steamengine at 20% efficiency in a car project - 2 days ago
Your right, you really don’t get it. It’s a forced circulation generator. The water going through the main tubing is being forced by the pump at a higher pressure, there are two pumps. One a feed pump the other a forced circulation pump. There is no steam space in the tubing, it’s only in the top of the drum. The water feeding the superheater is taken from the drum. This concept of forced circulby Rolly - SteamStuff
Re: Uniflow steamengine at 20% efficiency in a car project - 4 days ago
You may want to try a forced circulation generator with out the condenser at first. Very efficient proven design. (Cir 1874-1880) James B Herreshoff used in the Navy torpedo boats. Size it to your needs. Actually my model would run your engine nicely. Rollyby Rolly - SteamStuff
Re: start up times - 7 days ago
Rick I don’t believe him for one minuet. You just can’t get more out of something then you put in; also converting something to something else requires energy. I think he’s having wet dreams at night. I’ve seen more bad designs and errors in just about everything built by the so-called top engineers and experts and that was approve by other so called experts that approved the founding. Rollby Rolly - SteamStuff
Re: Uniflow steamengine at 20% efficiency in a car project - 8 days ago
There is no free lunch, the power it takes to pull a vacuum on the condenser to the engine takes more then the power you will gain from the engine. Build a boat with a full-length keel condenser. You still will not pull a vacuum on the engine. You might think you will but the power to get the condensate out of the condenser and up to a hot well will take more then you gain. It’s cheaper to useby Rolly - SteamStuff
Re: Uniflow steamengine at 20% efficiency in a car project - 25 days ago
Rick The pump shaft and shaft housing is Invar 36 ( almost pure nickel ) no expansion or contraction up to 600F, same stuff the lens housing used on the Hubble telescope. The seals and bearings are PTFE, the invar housing is also water cooled with feed water passing around the bearing housing. When I sent the castings down to Tom I sent the shaft of Invar with them, I had two many other pby Rolly - SteamStuff
Re: Uniflow steamengine at 20% efficiency in a car project - 26 days ago
Rick I was looking at a carbon impregnated Teflon ratted at 2500F but could not find a source. Also to be used on forced circulation steam generator pump.by Rolly - SteamStuff
Re: Uniflow steamengine at 20% efficiency in a car project - 30 days ago
One of my dreams has always been to try a large scroll compressor in reveres as an expander for a steam engine. Just need the right seals. Large expansion ratio. Rollyby Rolly - SteamStuff
Re: Trackless Locomotive - 6 weeks ago
I have made sight glass from tubing fittings, and used them up to 150 PSI. I think it was stretching it a bit. But they worked. Rollyby Rolly - SteamStuff
Re: Trackless Locomotive - 7 weeks ago
I’ll say one thing for you, you do nice 3-D cad work. I’d go with larger tube size like 5-16 or 3/8 and less space between the tubing. Slightly less then the tube diameter. Rollyby Rolly - SteamStuff
Re: Trackless Locomotive - 7 weeks ago
You should look at the White steam generator. Several years ago I had the opportunity to see two White generators apart and out of the cars. I did cad drawings and made a scale model for my collection. I belong to model engineering club and build scale. The White would fit nicely for your size and is a proven design. 3/8 copper tube would work just fine, just a little larger then my model.by Rolly - SteamStuff
Re: Trackless Locomotive - 7 weeks ago
Centrifugal pumps do not put out high pressure. Some can reach 50 PSI; it’s all in the housing design and motor power on the impeller and the impeller design. Most heating plant boilers for general heating and air conditioning only run under 30 psi and most under that, can get away with centrifugal pumps for feed water and distribution. The pump I designed was for circulation of the water inby Rolly - SteamStuff
Re: Hello - From a newbe to the Steam Auto Arena. - 7 weeks ago
Smart move. Rollyby Rolly - SteamStuff
Re: Uniflow steamengine at 20% efficiency in a car project - 2 months ago
Gee I thought a studied all the good books, George Corliss, Abner Doble, and the great Nathanael Green Herreshoff and more. Never saw one by you, I’ll look again. Rollyby Rolly - SteamStuff
Re: Flash Steam hydroplane - 2 months ago
Very nice. Would like to know more about the generator and engine. Rollyby Rolly - SteamStuff
Re: Uniflow steamengine at 20% efficiency in a car project - 2 months ago
Your right Ken Scaling an object for looks or for performance is altogether different. I belong to a Model Engineering club in New England; we now have our monthly meetings on Zoom. It’s great to see each other and see what each is working on. I think Jim’s engine would have worked a lot better if a lot of other things were arranged differently. The boiler was up in the bow of the boat overby Rolly - SteamStuff
Re: Uniflow steamengine at 20% efficiency in a car project - 2 months ago
I finely found two photos of Jims engines, I also know somewhere I have them on the boat. Some day. They ran beautifully but the valves leaked a lot of steam with the double seats. Rollyby Rolly - SteamStuff
Re: Uniflow steamengine at 20% efficiency in a car project - 2 months ago
Most states have a antique provision in the law or registering requirements. I know in Mass the local registry had to go to the main office to understand the requirements. The Stanley was not listed as a known automobile and the sales taxes have to be paid when bought regardless of being register or not. They did know it was made in the state. There is also provisions for a home made vehicby Rolly - SteamStuff
Re: Uniflow steamengine at 20% efficiency in a car project - 2 months ago
Ken I have to agree with you 100% on the double acting uniflow engines. My friend Jim dead almost twenty years now built two beautiful marine paddle wheel engines for a twenty foot boat. Double valves on each end of the cylinders. Three inch by twenty inches long if my memory serves me. The valves were made from 400 series SS, the top valve tempered hopefully to insure both top and bottomby Rolly - SteamStuff
Re: Hello - From a newbe to the Steam Auto Arena. - 2 months ago
Rolly - In your response on the Thread on - Trackless Locomotive - you show LED Versions of sight glasses: WHERE DID YOU FIND THESE? Is there a catalog I have not found yet? Please expand my knowledge in this area. Jin Good luck with your projects. The LED water level indicator are my own design and build, I have made several versions. Some are on the internet somewhere. SACA-NE president Daby Rolly - SteamStuff
Re: Thomson Surrey - 2 months ago
Chris I am originally from Massachusetts moved to Florida in 2005. Do you know how The Wolfpen auto museum liquidated the cars. Was there an auction or did they sale off the cars one by one. Curious. Rollyby Rolly - SteamStuff
Re: Uniflow steamengine at 20% efficiency in a car project - 2 months ago
Small size steam turbines are inefficient most have two or three turbine blades and one or two stators and run at 3600 RPM or more. I have removed hundreds from old power plants and replace them with electric motors. Used in an automobile they would require a very good gear reduction box and much larger steam generators then a piston steam engine. Rollyby Rolly - SteamStuff
Re: Doble lubrication - 2 months ago
The problems with the Doble and White is the superheat temperature. It often exceeds the ratting of the steam cylinder oil causing the valve rings to seize. Most steam cylinder oil is only rated 500 F, some modem oil can hold fairly good for peeks of 700F but not for long. Rollyby Rolly - SteamStuff
Re: Hello - From a newbe to the Steam Auto Arena. - 2 months ago
No the object is to lubricate the piston and valves. The closer to the engine the oil is injected the less the oil will heat up and vaporize. Exhausting into the street on non condensing cars we just don’t talk about. Most of the time it’s just comes out as smoke until the car sits for a while then there may be a drip from the exhaust. Rolly.by Rolly - SteamStuff
Re: Hello - From a newbe to the Steam Auto Arena. - 2 months ago
Mobil steam cylinder oil https://www.mooreballiewoil.com/product/mobil-600-w-super-cylinder-oil-5-gal-pail/ MOBIL 600 W SUPER CYLINDER OIL 5 GAL PAIL $154.35 I have been using Mobil SHC 634 ISO 460 Synthetic gear & bearing oil for years. Never had a problem. Separates from the water almost instantly. Rollyby Rolly - SteamStuff
Re: start up times - 3 months ago
The Doble generator to my small bit of knowledge is the best ever created. Not in a long shot. Rollyby Rolly - SteamStuff
Re: Effect of volume displacing cable in fuel vaporizer on fuel temperature - 3 months ago
Rick I hope these photos are self explanatory.by Rolly - SteamStuff
Re: Effect of volume displacing cable in fuel vaporizer on fuel temperature - 3 months ago
Most oil fired fuel air blower or vaporized burners don’t really need much help unless there is long exhaust duck or lots of small tubes in the boiler. Small tubes are not the best design, keeping the boundary layer wet is where the heat transfer takes place A lot of this has to do with proper flue configuration and size with combustion gases. True boiler tube design and gas flow is a science; yoby Rolly - SteamStuff
Re: Effect of volume displacing cable in fuel vaporizer on fuel temperature - 3 months ago
Maybe I’m having a senior moment hear but a good condenser can draw a 29.5 inch vacuum on the low pressure cylinder. My Steamboat Tryall vacuum gauge read close to 30 inches. All the time. Steam collapsing back to water is great stuff. Or are you referring to boiler flue exhaust gas. ???? trying to improve combustion chamber pressure. In a good wind over the stack my wood burning boiler in my 2by Rolly - SteamStuff
Re: Cruban burner and the Empire Pilot - 4 months ago
Backer Boiler I think the Backer boiler is one of the worst boilers I have ever studied compaired with most of the orher automoble boilers and generators used. The superheater section alone has more tubing then White Generator. It’s high up in the top section of the boiler. The Backer burner is the only good thing that came out of the design. I just don’t think enough were made to be widely uby Rolly - SteamStuff
Cruban burner and the Empire Pilot - 4 months ago
Cruban burner and the Empire Pilot This is a burner that several Northeast Chapter members have and is the same type David Nerrgaard is using in his 1920 Stanley. Now I believe nearing 200,000 miles. I can’t say it’s trouble free as I know the parts are old and David’s looks to have a lot of welding on some of the pilot parts. I know I have made some parts for his and one in Texas. Riding iby Rolly - SteamStuff