flyrotary@lancaironline.net Mailing List Archive

Thanks for the feedback Jason! Luis -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] Sent: Friday, November 07, 2014 6:11 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Rotary Design Change I think the consensus has been that this is pure malarky. #1 - his explanation suggests that the intake chamber is at higher pressure than the exhaust chamber. Obviously the opposite is true, so air fuel mixture is never going to cross over the spark plug hole into the exhaust chamber. Exhaust gases crossing over into the intake chamber probably isn’t helpful, but restricting the size the spark plug hole would be more detrimental to proper ignition, so his linear plug hole doesn’t solve anything. #2 - there is no torque being generated at top dead center so the pressure across the rotor face argument is misguided. Changing position of the compression pocket would not have the effect he is describing. Mazda tested offset compression pockets and it did not help anything. Its actually a lot more exciting to read the SAE papers about the Renesis improvements which actually were quite helpful in reducing emissions and improving efficiency. They virtually eliminated cross talk between exhaust and intake ports. Or talk about the 16X engine - the version they are still playing around with in Japan. It has higher displacement (1.6 liter versus 1.3 liter 13B) with a narrower rotor width, larger rotor diameter and larger eccentric offset. These changes cause an improvement in thermal efficiency (better surface to volume ratio than the 13B) and better low end torque properties. They have had great success with this engine in their direct injection hydrogen testing - air is drawn into the intake chamber and after the apex closes off the chamber, the required fuel is squirted directly into the chamber. I am disappointed in the news over the last year or so that the rumored new Rx-7 has been shelved for now. If they came out with a 16X Rx-7 right now, I would buy one immediately. On Nov 7, 2014, at 12:22 PM, Luciano, Luis I CIV PEOSUB, PMS404P <flyrotary@lancaironline.net> wrote: Friends, I may be late to the discussion but I recently saw an interview in YouTube which spoke of design improvements to the rotary engine. I wanted to ask the collective opinion on the feasibility of making this modification. It talks about preventing some compression loss (and wasted fuel) from the apex going over the spark plug hole as well as offsetting the ignition chamber on the rotor (see link below). http://www.youtube.com/watch?v=m3pCLjHZmhM Regards, Luis Luciano Velocity XL-5 "Dulcinea" -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html