Hi
Ed,
I have
to wonder what do you do when you're not thinking about airplanes?
Sleep?
Thanks
for you're interesting discourse on diffusers. This leads me to a question
that's been in my mind for some time.....
My
NACA duct (pusher) leads into a plenum which is constrained by the sizes of the
cowl and radiator.
The
forward end of the rad is only a couple of inches behind the firewall, so the
"diffuser" is pretty abrupt. I've been wondering if I should insert a fiberglass
panel to make the diffuser angle much less, but this would block out the first
foot or so of the rad. I could leave a gap at the end so the air has a way to
get at the first part of the rad, but blocking the rad like this seems counter
intuitive. Note that I have a cowl flap at the rear of the plenum which
will allow air to bypass the rad and flow directly out of the back of the cowl.
This should allow me to experiment with the pressure and airflow inside the
plenum.
Also, in case you'd like to comment an how they might work, I
have ducts leading from the plenum to diffusers on the intercooler and ac
condenser, plus a duct for the turbo intake air. Finally I have a big fan
on the underside of the rad.
The sketch at http://kgarden.com/cozy/diffuser.jpg
might help explain what I mean. The upper picture shows what I've
got. The lower one shows what I could do, and also shows the cowl flap
open.
The
question is - should I do this? You're thoughts and comments would be
appreciated.
Regards,
John
PS I posted this with the picture attached, but
it didnt appear on the list. Sorry if it turns up
twice.