REFLECTOR:Innie or Outie??
Scott Derrick
reflector@tvbf.org
Sat, 19 Jul 2003 20:21:57 -0600
My new exhaust should arrive soon from Custom. a 4-into-4 2 pipes
exiting through the lower cowl on each side straight back. I need to
change how the exhaust exits the cowl completely from a single center
exit to two exits on each side.
I've seen pictures of where folks molded fiberglass tubes around the
stacks, I call it an Outie. A protuberance that sticks out from the
fuselage. These look nice and streamlined and help keep the exhaust
stains off the cowling, but disturb the airflow at a critical place.
I'm contemplating an Innie. Keep the cowl lines undisturbed for the
least disturbance of air flow through the prop. Make long indentations
from where the tube meets the cowling back towards the rear of the
plane, the indentation gets less deep as you get further back for the
exhaust to flow into the surrounding air flow. The exhaust tubes would
be cut off so as to not stick out above the line of the cowling. I'm
probably not explaining this very well. Some of the W.W.II fighters had
these indentations where the exhaust stacks came out of the forward cowl.
Do you think it would be worth it? Any reasons not to do it this way?
Scott