> > > Hey Buly, what are the dimensions of your water radiator?
> > >
> > > Scott Gettings
> >
> > I don't remember Scott, but I'll check tomorrow and let you know.
> > Buly
> >
> > I have a few pictures of the rad Buly cut in half.
> > My guess it is 10 to 12 inches wide. Shows what can be done
> > with a proper scoop and diffuser.
> >
> > BTW Scott how is the great experiment coming?
> >
> > Paul Lamar ...No rotor no motor.
> >
>
> The reason I asked about Buly's radiators is that the core size I we
> looked at fitting in front of my engine is (2)9x12x2.25", or 486 cubic
> inches. Yet your book says 600 cubic inches are needed. I
> measured the
> water radiator on my RX-8, and it looks like it has about 400 cubic
> inches. The intake ducting is far from ideal. The car also has
> about200 cubic inches of oil coolers, for a total of 600 cubic inches.
>
>
> On the aerodynamic testing, I haven't been able to spend a lot of time
> on my plane lately, but I have the mold/model of the side of the plane
> done. I made an upper and lower surface for the upper wing root and
> duct taped the leading edge smooth. I filled in the lower wing
> leadingedge area with foam and duct tape to make reasonable
> leading edge.
>
> The water manometer is done. I've drilled holes thru the side of the
> pylon in several locations so I can take readings from the back
> side. I
> have the porous foam to cap the flexible tubing, but need to find
> a way
> to seal the tubing end and foam from the back side, so I only get a
> pressure reading from the hole. Maybe modeling clay or
> epoxy/micro?? I
> didn't want to run the tubing on the outside due to the VG effect
> of so
> many tubes.
>
> What I have left to do is to fill and sand the outer surfaces smooth,
> and figure out a way to mount the whole thing on top of my Explorer.
> Should the wing stubs hang outside the edge of the vehicle to be
> in more
> clear air? I don't want the vehicle airflow to give me false
> readings.
> Scott Gettings

> The 600 number is a conservative average assuming there will be
> flaws in design and construction of the scoops and ducts.
>
> The RX8 almost never generates 150 HP continuously.
> It is more like 30 or 40 HP. The RX8 has an efficient heat exchanger.
> It is probably 20 inches wide by 20 inches high and less than an
> inch thick.
>
> Buly has an ideal P-51 style ram air scoop and diffuser with a
> wide open space behind the
> the rad. My guess his core is a minimum of 20" by 12" by 2 inches
> which is 480 cubic inches.
> If it is 14 inches wide the volume would be 560 cubic inches.
>
> Perry Mick also has an ideal well sealed system. In fact his core
> is a super efficient
> cross counter flow core. My guess it is 15" by 15" by 2" OA or 450
> cubic inches.
> The air exits into a very low pressure area behind the fuselage.
> Although he does not use a ram air scoop the prop does a good job
> of sucking the air out of the back side of his cross counter flow cores.
>
> You could mount the test rig on top rotated 90 degrees with the
> wing stubs pointing straight up. Move it out over the hood with two
> longitudinal 10 foot long 4" by 4"s to get cleaner air. Take it out
> to the Florida out back to test it. Nova Road is a good one.
> I have been down that one.
>
> There will be a lot of lift on the rig due to pressure build up
> underneath so run a good size nylon rope (3/4") around the middle
> of the 4-bys through the
> upper part of the pax window and through the upper part of the
> driver window
> as far forward as you can get it to insure you don't lose the rig.
> The lift on
> the rig will be several hundred pounds at 80 MPH or so. You will
> have to get
> in the back door of the Explorer :) I am also assuming the roof
> rack is strong.
>
> Paul Lamar ...No rotor no motor.

Got it and will do.

Thanks, Paul

Scott Gettings



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