I have the ‘third iteration’ of the 20B engine marked as the C927 series on each rotor housing but I don’t think they changed the intake tube sizes at all on any of them……my UIM and LIM is still bolted together.
You can also check with these folks….they make a modified lowered lower intake manifold for the 20 B and many 13Bs…
Unlike what Tracy said, all 6 runners ‘appear’ to be the same size at that junction…….
http://www.xcessivemanufacturing.com/ONLINESTORE.html?cid=10&step=4&pid=300
What are you Girrrls up to?
Marc
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy
Sent: Saturday, January 19, 2013 7:15 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: 20B intake
Don't know what IDs Mazda used but on the 20B I used 1 1/2 for secondaries & 1 1/4 for primaries.
Marc, not really fluent on differences of 20B generations but we are trying to determine the designed cross section of the primary and secondary intake tubes. On the 13B's the junction where the upper and lower manifolds has perfectly round and constant cross sections, hoping the 20B does the same.
Chrissi & Randi
www.CozyGirrrl.com
ClickBonds 10/$7.50
CG Products, Custom Aircraft Hardware
Chairwomen, Sun-N-Fun Engine Workshop
I have those Chrissi. You need IDs for each tube rotor at the junction, correct? Or has it already been answered?
Marc
We are hoping someone with a 20B still has the original intake upper or lower, we need the ID's of the primary and secondary tubes at the junction of upper and lower manifolds.
Thank you, Chrissi & Randi
www.CozyGirrrl.com
ClickBonds 10/$7.50
CG Products, Custom Aircraft Hardware
Chairwomen, Sun-N-Fun Engine Workshop