![]() CNCCookbook: Stirling Engine Models Stirling Engine Models. This page is largely links. Stirling engines I've collected. Stirlings are fascinating. I rate Stirlings as harder. MUCH easier than model turbines! Here is a. Rhombic driven Stirling: I'm also interested. Stirling designs for the production of electricity from solar. See my page on that for more. My Stirlings. Jaxa Floating. Piston LTD Stirling. Links. on Theory and Practice. Great. Primer on How the Stirling Works. Nice. spreadsheet walkthrough on how to design a Stirling engine. Excellent. Schematic Overview of Various Stirling Configurations. Quirky. Engines: Theory, various projects, and models you can order. Wonderful. Stirling Engine Animations. Stirling. Engine Forums. Great. Collection of Stirling Articles Reprinted. Ivan's. Practical Tips for Building a Stirling. Koichi. Hirata's Model Stirling Pages: Theory, free plans, and a lot more. UK. Stirling Engines Organization. Talk of radically different designs always. MOTA software, 2 stroke engine simulation software, 2 stroke exhaust design.
Typical layout. for a model Stirling. This is the classic Kouhoupt model.. Links. on More Specific Models. ![]() Stirling- powered. Robot Fish : Interesting Japanese project. Nice scale of Stirling. Coffee. Table Stirling Engines: Nice collection of photos. Jon. Bondy: Has built several model Stirlings, has a Stirling design program. How do you go wrong. Low. Temperature Difference Stirling: Run a Stirling just by setting it. Steele. Stirling Engine Plans: A 4- cylinder design capable of claimed 4. Roy. UK's Stirlings: Several to choose from made from simple materials. Logic. System Technology: Several interesting designs including a super low. Stirling that runs just from the heat of you. Stirling. South: Nicely made CNC Stirlings from some college professors. Here. is the main. Stirling page. The rest of the site is also quite fun! Wonktoys. Another . A really novel Stirling design. John. Horne's Stirling Tractor: A museum quality Stirling- powered steam- style. Barry. Dunman: His . This site has a nice one and a movie of it running. Syl's. Hobby Page: Lots of engines and other HSM projects. Jos. de Vink: Many beautiful engines styled in an old time Brass 1. Jan. Ridder's Modelbouw: Many interesting engines on display, and he will. Boyd's. Tin Can Stirlings. LTD. Striling Plans: Plans for a relatively easy to build LTD. Free. Piston Stirling from Japan that'll run on a cup of coffee. Made by. a company called JAXA. Here is a. gallery of pix building one. The. Hermit's Machine Shop: A few Stirlings similar to Rudy Kouhoupt's. Stirling fan. Gold. Stirling: Plans available, plus some gorgeous pictures of models. Links. to Other Stirling Resources. Airpots. Marv Klotz says airpots/dashpots make great Stirling cylinders if you. This company sells airpots. Thoughts- Marbles are 1. Test Tube Stirling. Test tubes are abundant on e. Bay and cheap! Watch sharp bends, abrupt changes. Move. gas in parallel rather than series. Keep the bore big and the stroke small. Think torque rather than speed.- Minimize dead volume. Strive. to move 1. Even better, forget the compression and use the correct expansion. They are the same number, but expansion better reflects the conversion. The ideal expansion ratio is the square root. Since any gas not fully heated or cooled. Theoretically, you could. Stirling. But twice. If exchanger area remains. Higher pressure also greatly increases flow losses resulting. HIgher pressures also require more material. That material might have been better utilized. Don't let the theoretical. To the extent the. Stirling's 1. 81. L = 3 times its diameter. Note that much smaller. Stirlings. Other sources recommend. The purpose of making the heater chamber longer than the cooler was. Use of thin. wall tubing and making the chamber walls out of something that doesn't. Model. Stirling Gallery. Photos. of Stirlings I particularly liked. These all came from sites in the links. John Horne's Stirling. Tractor.. 4- Cylinder Stirling. Alphonse Vassalo. Edward Bashauer's Stirling. Airplane Engine. Alphonse Vassalo's. Solar Stirling with an 1. It's amazing what can be done. Bill Sondagh of the. Netherlands has a fine collection of Stirlings he has built.. Aquatap is a Ringbom. Stirling by Roy Rice at Stirling South. The Ringbom requires no. Closeup of the gimbals. Barry Dunham's Test Tube Stirling. I still can't. quite make out how the displacer end works.. Roy Rice's Rhombic. Stirling is way cool! Detail. of Rice's Rhombic drive.. Chuck Fellows built. Stirling.. An interesting and. Stirling that reuses an old OS model airplane motor.. Syl's Miser is an LTD. I like the styling.. Another ridiculously. Bohm model! Looks like it took some waterjet or laser and. CNC to make it. You gotta love the Steampunk + Raygun motif.. Most installers don’t like change and are sometimes only too quick to criticise other systems, often labelling them cheap or just rubbish, especially those systems originating from Eastern Europe. Comparing Systems As fuel injection specialists, with lots of diagnostic test equipment at our disposal and also an involvement in research and development for LPG/CNG Diesel blend systems (See the CRD Technology website for more information), we make it our business to properly evaluate all makes of kit. The majority of LPG kits are manufactured in Holland, Italy and Poland. There are others, mainly from Eastern Europe, but these are only a minority. Some companies manufacture complete front- end kits (these are the bits that fit in the engine bay) while some manufacture only the electronic parts and then outsource the LPG injectors and LPG reducers. Likewise, some manufacture the LPG injectors and reducers but then outsource the electronic components. Italian LPG Systems Take for example Bi- Gas, OMVL, Romano and Zavoli; these are all Italian companies who all manufacture their own LPG injectors and reducers but then outsource (and re- badge) the same electronic control units (ECU) from another Italian company, AEB. Ironically, the largest LPG equipment manufacturing company in the world, Landi Renzo, who are also Italian, not only buy their electronics from AEB also, but they own them too! Dutch LPG Systems As for the Dutch sytems; Prins build their own electronics and reducers but buy their injectors from Keihin in Japan. They then claim their kits are the best in the world, all because of the good quality Japanese Keihin injectors they use. Tartarini make their own reducers and injectors but then buy their electronics from AEB, Lovato do similar but also buy their reducers from Landi Renzo. AG and Necam / Koltec are better known as suppliers of factory fitted LPG systems; they manufacture most of their own components but then also supply them to be used by Pharos and XLR8 for their LPG and CNG kits. Polish LPG Systems Poland has several LPG manufacturing companies who export their products globally; the main three being Stag, KME and LPG Tech, all of whose kits we have used and with excellent long term results. The Poles tend to manufacture their own electronic control units and sometimes their own LPG injectors and reducers but then make their software compatible with a wide range of different injector and reducer makes. KME make their own excellent reducer while the Majic injectors they promote are probably one of the highest flowing and most powerful injectors we have ever tested using our rolling road dyno. Polish LPGTech System fitted to a Jeep SRT8. The injectors are without doubt the most crucial component in any LPG system and apart from Keihin in Japan (Prins), the Korean made Hanna and Polish Barracuda injectors, that we often fit, are probably the best available. One of the few companies we believe manufacture and sell only their own equipment is BRC in Italy. We still rate this as probably the best make of kit available all round, but expensive when compared to the Polish kits. There definitely are some “rubbish” kits on the market, but just because kits or parts come from countries where manufacturing costs are lower, it shouldn’t be thought said they are all rubbish – far from it! Sadly, due to the lower purchase cost of some of the Eastern European LPG kits, they can attract less competent installers who, for very little cost, will fit a full LPG system in a day (a day!). To correctly install an LPG system takes a competent UKLPG qualified Fitter between 2 and 4 days, depending on the engine cylinder configuration and tank type used. Following installation, the LPG system has to be programmed, calibrated, and then the vehicle road- tested using a Scan tool, to ensure correct fuel trim set up. Installations carried out in one day can’t possibly allow for any quality control or margin for error. We’ve known some of these one- day installation companies to even supply their customers with a plug- in calibration lead and software, encouraging them to attempt to rectify any poor running concerns themselves. CRD Performance often use their Sun Ram X1. Rolling Road Dyno to set up newly converted vehicles, especially where the customer has requested that performance on LPG should come before economy. Some petrol vehicles leave the factory running so lean on wide open throttle that just by adding a little more gas on acceleration can improve BHP and torque significantly. Dyno Setup and Checking of a Newly Converted Vauxhall Astra. Choosing the right LPG System. When choosing an LPG kit for a specific vehicle application, we at CRD Performance have several things to consider, including first and foremost the customers budget. Other things we need to consider are what the vehicle’s main use will be. For example; is it going to be used as a Taxi or Learner Driving School car? Will it be continually stalled or stop- started and therefore be requiring a specific type of LPG system that allows instant gas start up when the engine is warm. Is the owner interested purely in fuel savings or is he/she a . Does the engine rev at a very high RPM, requiring special high- flow injectors and will it require additional valve care lubrication? Is the engine supercharged or turbocharged and therefore requiring the LPG reducers to be installed using MAP sensors and boost compensation? How long the vehicle is likely to be kept? Is the engine intake manifold easy to adapt for LPG injection or are long pipe lengths necessary therefore requiring an abnormally high gas pressure and use of high current, low impedance injectors? Is it a high powered vehicle and will it require two reducers? Will it also need a fuel return modification because it has a return- less fuel system? And so the list goes on, and on . The price we quote might be more than some other installers; that’s not because we’re dearer, it’s because we charge for the time we spend, to give you the finished results that we are so proud of and are so well illustrated on this website. Which LPG System do CRD Performance Recommend? CRD Performance (previously F1 Automotive) have been installing most makes of LPG systems for over 1. Most LPG installers tend to try several makes and then, for whatever their reasons choose one make they feel comfortable with, this may be due to the complexity of that kit and their technical ability. They then try to convince every potential customer, on every new enquiry, that their chosen make is the best one to have no matter what their vehicle. Honda CR- Z SP I- VTEC IMA Hybrid Electric STAG LPG conversion. CRD Performance, as recognized fuel injection specialists for both petrol and diesel blend LPG and CNG, have their own in house rolling road dyno testing facility and are actively involved in LPG Diesel Blend development for CRD Technology Ltd (crdtechnology. Directly as a result of this development work we have been fortunate in being able to install, test and evaluate not just most manufacturers complete LPG systems but also most, if not all, the many different makes of the so critically important LPG injectors and LPG reducers. Some branded LPG kit manufacturers (eg. Prins, BRC, Zavoli.) will only sell their systems to installers as a package, complete with their own brand of injectors and reducers as part of a front end kit. We believe a better approach is to compare an LPG system to an Audio Sound System where different makes of separates make up the best reliability and sound quality. Sony for example may build the best amplifier, Technics the best Tuner and Mission by far the best speakers. Using this example Prins may build the best ECU but the best injectors might be the ones BRC build but the most reliable and highest power reducer could be manufactured by Zavoli. Honda CR- Z SP I- VTEC IMA Hybrid Electric STAG LPG conversion. At the time of originally compiling this website about 3 years ago, we would have strongly favoured the BRC system as being our number one choice, closely followed by Prins and then Zavoli. Whilst in recent years the Italian and Dutch LPG manufacturers seem to have stood in developing their systems (excluding of course any recent direct injection systems) the Poles have made massive steps into making their systems the best performing, most reliable and technically the most advanced in the world. If we had to choose today, just one make of LPG system, based on reliability, cost, suitability, performance, driveability and value for money (for ALL non direct injection types of vehicles) the unanimous choice from all at CRD Performance would without any doubt whatsoever be the AC. Stag system. CRD Performance first used the AC. Stag brand during development of their LPG/CNG Diesel Blend system and it impressed us so much that we’ve made it our No. LPG conversions. This kit is awesome; it allows us to do things we’ve always wished for but not been able to do before. Honda CR- Z SP I- VTEC IMA Hybrid Electric STAG LPG conversion. What helps even more, and gives us yet a further advantage over most other LPG installers is that Eddie Zyla, the owner of CRD Performance, was born in England to Polish parents but speaks both fluent English and Polish. Needless to say, with there being no language barrier we have no problem at all when needing technical assistance or to discuss any special software requirements. Unlike some LPG system manufacturers, AC. Stag have produced their own ECU (electronic control unit) but then programmed it so it can be used with almost any make of LPG injectors or reducer type currently available. Stag also manufacture in house their own design LPG injectors and LPG reducer as well as complete wiring harnesses, pressure sensors, connectors, looms and switches, in fact just about any part required for an LPG system. Honda Civic Type- R STAG LPG conversion.
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