This has been a fun project.... squeezing a quart into a pint pot.
I think 16" is too wide for the rad, mine is 14" and that is about the
max. No room for a oil cooler alongside either.
What about that 4" thick dual rad with a 4" thick tank on one end and
two 2" tanks on the other end? Both ports could come out the front and
right side and go directly up to the water pump with very short runs. I
think I might have CR Racing make one.
BTW Perry how is your oil cooler in the strake working these days?
Got any pictures of the final oil cooler air outlet duct you are using?
Paul Lamar
These are pictures taken last February, it has been painted now for a
long time. Exit is directly to airstream like the rad. Oil temps
improved about 10 to 20 degrees but I attribute all of that to switching
from the 82 to the 86 oil cooler. It still exceeds 210 when ambient is
above 80F, and I have to throttle back in the climb. And that is only
120 HP. I'm still sceptical of the 210 max oil temp. I think it goes
much higher than that in the car while only cruising around town at
40mph on a warm day, based on some temperature data I took years ago in
the oil pan of my car. 210 is probably a good idea for cruise, but
temporarily exceeding that in climb seems to be a necessity.
Perry
Thanks for the pictures Perry.
I still have your old oil cooler. I am going to have Ed flush it out
and weld on a new end tank. Then I will do a back to back cooling
test on it measuring the inlet temp verses the outlet temp comparing
it to another Mazda oil cooler I have. This will determine if there
is a difference in Mazda oil coolers from year to year.
BTW Ed next time you have one of these oil cooler end tanks
off please take a close up picture of the ends of the open tubes.
Is there any problem if I cut the tank off before I send it to
you?
What pressure are you now getting in the oil cooler inlet duct Perry?
A 14 inch wide by 25 inch long rad core would still give 700 cubic inches.
That should still be plenty as the air is freely able to leave
through the bottom. With the 5 inch wide oil cooler next to the rad
that would give a 19 inch wide overall width to the cooling pack.
The firewall is 20 inches wide according to a drawing you sent. In
the 3D of the cowling the spinner is 14 inches in diameter. This is
somewhat larger than yours so that also makes the rad look closer
to the thrust line. Also the rad in the 3D is up closer to the
bottom of the engine than yours is. I assumed a custom oil pan. The
rear end housing on the 13B is roughly 13 inches wide. There is
plenty of room room to suck the motor mounts in one or more inches
on each side. The rubber bushings are two inches in diameter so that
gives a width of 16 inches minimum back at the rear motor mount
position. Add an inch or two for clearances and that gets you up to
18 inches or so. I placed them where they are to give a bit more
clearnce to the turbo charger with a simple motor mount.
I'll send a top view 2D drawing with dimensions later.
Paul Lamar
I just looked at my cad drawing, it shows firewall to be 19 inches wide.
Look at those photos you just sent with this message. Make that rad any
wider and it will be a very square corner on the bottom instead of the
rounded fairing into the rad that I have.
What about putting the oil cooler next to the intercooler?
Here is a top view of my new engine mount. C-C distance between the two main
rubber mounts is 14 inches, and that will make the cowl wider at that point
than it is now on my plane.
Perry
Yes that would work. Good idea. Perhaps one on one side and the
other on the other side.
Here it is with a 14 inch rad along side the oil cooler
and the motor mounts sucked in a bit. Everything still fits.
Paul Lamar
The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/
Copyright 1998-2004 All world wide rights reserved.
