Well, Kevin
I really don’t know – I’ve never had a
backfire so don’t know how well the cast plastic would stand up. However, my
runners have walls over 1/2” thick – and I have beat the crap out of some test
pieces trying to destroy – finally was able to do it – but, it took a lot of
beating. With the TB and fuel injection I was not overly worried – figured if
the TB and plenum blew apart or off I would just have WOT condition.
Ed
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of kevin lane
Sent: Monday, May 03, 2010 12:40
PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] intake
manifolds
yes, my initial design is a
"shoebox" with a flat lid and blue goo. it was easiest to bolt
the carb with bolts from inside the box, so I didn't weld the lid on, but
bolted it instead.
while testing my setup without a fuel pump
[I have one now] the engine would run only up to about 1300rpm. I
remember I was pumping the throttle to see if that made any difference when I
created the "big bang" ☺ now I know why I couldn't get
anything out of it afterwards and consequentially gave up for the day.
so, I could rivet some nut plates to the
interior and weld it all shut [and not pump the throttle a bunch].
whether a pressure relief valve of some type is necessary would be a topic for
discussion. obviously in flight this would have stopped the
engine. [and yes, EFI may have continued to run in this situation]
the shoebox was my crude effort to route two barrels into the four on the
renesis.
Ed - are your plastic cast intakes
explosion proof? I certainly understand now why stock intake manifolds
always seem so overly strong!