gullikson Posted August 5, 2009 Share Posted August 5, 2009 Ran into this website today. A promising looking engine that is 25% the size, 30% lighter and 50% better fuel economy compared with a state-of-the-art, conventional turbo-diesel engine. Check it out. www.ecomotors.com Quote Link to comment Share on other sites More sharing options...
aviator_edb Posted August 5, 2009 Share Posted August 5, 2009 what a bizarre design. Opposing cylinders? Quote Link to comment Share on other sites More sharing options...
TMann Posted August 5, 2009 Share Posted August 5, 2009 what a bizarre design. Opposing cylinders?It oposses my rotary mindset. It might be very good, a real 'outside the box' solution or ....... Many more parts to break type of solution. Quote T Mann - Loooong-EZ/20B Infinity R/G Chpts 18 Velocity/RG N951TM Mann's Airplane Factory We add rocket's to everything! 4, 5, 6, 7, 8. 9, 10, 14, 19, 20 Done Link to comment Share on other sites More sharing options...
SAF_Zoom Posted August 5, 2009 Share Posted August 5, 2009 Thats really an old idea... think WWII... the Luftwaffe was using a similar design in the Jumo 205 diesel engine (used in the Ju 86 bomber) ... These engines were also based on 1920's desings (used in marine application)... So nothing new here... but still interesting... Quote Link to comment Share on other sites More sharing options...
TMann Posted August 5, 2009 Share Posted August 5, 2009 Thats really an old idea... think WWII... the Luftwaffe was using a similar design in the Jumo 205 diesel engine (used in the Ju 86 bomber) ... It's made in Germany. You know, the Germans always make good stuff. Well ... no wonder! Quote T Mann - Loooong-EZ/20B Infinity R/G Chpts 18 Velocity/RG N951TM Mann's Airplane Factory We add rocket's to everything! 4, 5, 6, 7, 8. 9, 10, 14, 19, 20 Done Link to comment Share on other sites More sharing options...
argoldman Posted August 5, 2009 Share Posted August 5, 2009 Look at the Gemini engine. Diesel, two pistons in each cylinder, fuel injected between the two pistons, they approach eachother, compress the mixture and poof you get the power. This engine has a crank where the typical valves are, one for each side, and they are geared to the prop flange. They have not flown but appeantly have a lot of dyno time and will soon be testing. They have a 100hp model (shown at OSH-- Looks great) and will, in the future have 200 to more HP. http://ppdgemini.com/_PDF/Gemini_100_Spec_Sheet_1-10-09_B&W.pdf Quote I Canardly contain myself! Rich Link to comment Share on other sites More sharing options...
airwrench Posted August 19, 2009 Share Posted August 19, 2009 Benifits of the design? (Hum) Supposing you cannot glean sufficiant power from one piston per cylinder? I am thinking that the distribution of power to the crank at two points is of little benifit......perhaps a nice power plant for a irrigation pump? Quote Link to comment Share on other sites More sharing options...
JCPJCP Posted August 19, 2009 Share Posted August 19, 2009 With only 2 power pulses per revolution, will have high torsional vibration. Diesel-Air/Gemini and Wilksch both started out as 2 cylinder 2 cycle, and later progressed to 3 cylinder 2 cycle designs. John Quote Link to comment Share on other sites More sharing options...
Arbiter Posted August 19, 2009 Share Posted August 19, 2009 When I saw the two Diesels at Oshkosh I thought they both looked pretty well thought out. I know that they aren't in any kind of large production, but I am interested in seeing how they come into the market place. I think 100LL is going out the door in the not too distant future, and a lot of effort on aviation bio-fuels is towards making Jet-A. Maybe a diesel is the way to go in planning for the future (10 years out or so)? Deltahawk has one flying in a Velocity, it looked pretty cool. I'll definitely be looking more into Diesel and I am excited to see how the development progresses! I think Deltahawk seems to be about 10-12 years into their development cycle, which should mean they'll be starting to trickle out of the factory soon. That's about the right time-line for the development of anything to do with Aviation , especially engines... Shhh, don't tell that to the 787 guys... they might cry :-P.... -Chris Quote Chris Zupp ~Aircraft Designer~ Preliminary Design Sequence I: Project Endeavour Aeronautical/Mechanical Engineer Private Pilot Link to comment Share on other sites More sharing options...
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