Happy New Rotary Year to everyone.
Steve,
I've had a real hard time understanding the timing in some of the Mazda papers because they say X deg. before TDC and than the next line will say Y deg. before BDC. I believe they are referencing TDC on the compression stroke and than BDC on the intake stroke! Of course if you can determine how much the rotor turns in degrees the "E" shaft is just 3 times as much.
When you are determining the time available for a FAW wave to travel from the closing of rotor #1's intake to the closing of rotor #2's intake the rotors turn 60 deg. and the "E" shaft turns 180 deg. You asked how far open should the intake on rotor #2 be when the FAW arrives - I do not know - but I'd want it to arrive when the intake is still 50% or more open. With the rotor and intake geometry that Mazda uses, the intake goes from almost full open to closed with very few degrees of rotation of the rotor.
Dennis Haverlah
----- Original Message -----
Sent: Saturday, January 01, 2011 7:16 AM
Subject: [FlyRotary] Intake manifold for 4 port Renesis
Happy New year everyone.
I noted Dennis Haverlah had re worked his intake and I wondered who on the list has done the math.
I've done it myself using Mark Warners "Street Rotary", however I don't know enough about when the reflected wave should arrive optimally at the open port of the next rotor intake event?
Should it arrive when the port is at its most open state or latter?
Also, can someone explain to me the timing in degrees of E-shalf rotation between TDC and BDC (sorry if that is a dumb question).
Many thanks again to all on the list.
Steve Izett
Perth, Western Australia
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