Is there any information on the website showing the timing of the intake
 and exhaust port relative to eshaft rotation? I am specifically
 interested in the overlap and the e-shaft angle at which the apex seal
 clears the exhaust port.

 Inspired by your 555 system, I have designed a simple digital converter
 to convert MAP to pulse width for controlling the injectors.  We know
 that the volumetric efficiency of the p-port at 6000rpm is 120%.  I am
 wondering how much of that 120% is represented by intake air passing
 through the chamber and out the exhaust during overlap. If this occurs
 at all, it would improve efficiency to minimize the amount of fuel in
 the bypassed air, suggesting that the injectors should be opened after
 the exhaust is at least partially closed

 Victor Roberts


 I don't have the numbers for the timing but it is exactly the
 same as the Le Mans 4 rotor.

 http://www.rotaryeng.net/Mazda_R26B_US.pdf
 http://www.rotaryeng.net/Welded-steel-p-port.html

 The numbers can be derived from the scale dwg in this last link.

 The exhaust and intake P-ports in a rotary never really close.
 In that regard it is more like a turbo jet.
 What air does not go in one chamber goes in the next.
 In a tuned rotary engine however the max pressure in
 any given (One of 3) compression chamber depends on the RPM,
 pipe length and pipe diameter.

 http://www.rotaryeng.net/Mazda-p-port-press-wave-enhanced.jpg

 The best place to measure this pressure is the apex oil injector
 holes just above the p-port intake. Of course one is not using
 these holes for oil injection. One mixes the apex oil with the fuel.

 I am coming back to the 555 system and adding a single chip computer
that
 has the sole job of adjusting the mixture using a USB port and
 storing the trim data in a spread sheet format. The program becomes
 extremely
 simple and easy to comprehend. Merely a look up table in the single
 chipper.

 Henry Nee came up with this great idea and people can email and share
trim
 tables. Any number of trim tables can be stored in one's PC. It also
makes
 editing the trim table simple as you do it in your PC using a spread
sheet
 program. This should greatly speed the tuning of your engine and similar
 installations can use the same trim table. We can put them on the web
site
 for rapid download. Parameters affecting the trim are type or drag of
 the airplane, diameter and pitch of the prop, intake pipe length and
gear
 ratio used. Assuming all are using a p-port.

 Paul Lamar

 Victor,   I have seen the port timing numbers in the Kenji Yamaguchi
(SP?)
papers.  I think there is a link on Paul's  site  and possibly on Craigs
Rotary List site also.

george grimes

http://www.turborx7.com/porttiming.htm

cbeazley