> > > This guy betrays his own lack of 'mathmatical facts'.  Since

engine

 HP is
 > > > almost directly related to available manifold pressure, the HP
 increase
 > > > using HIS numbers would be 7.727 HP.  (.710 / 14.7 =  4.829%

*

 160 HP =
 > > > 7.727)
 > > >
 > > > Ever seen a formula 1 racer NOT use a ram air inlet?
 > > >
 > > > Tracy Crook

 > I think part of the issue with canards is that the carb air box

resides

 in the inside of the lower cowl. The "ram air" is from a scoop on the
 underside that is either a NACA or P-51 scoop. The scoop is also the

sole

 source of cooling air. So although the inlet of the carb box may face
 forwards towards the inlet aperture it is still inside the cowl so it

is

 in a common high pressure area but not necessarily getting direct

"ram"

 effect. Cooling problems are so rampant with sorting out new canards

that

 even though somany have been built to plans, they each seem to have

their

 idiosyncracies. I am still wondering if the outlet area of the

typical

 canard is not choking off the airflow.
 > I listen intently to these discussions since cooling issues in a

canard

 are a given, I wonder how well the NACA scoop with its 45 sqr inches

is

 going to provide cooling for water, oil and intercooler.
 > My current thoughts are to make the lower edge of the NACA rotate

down

 to double the opening size to 90 sqr inches when needed with a
 corresponding exit increase through movable cowl flaps in the rear.
 Although this may work well to cram air and release it, this may be
 counter productive to climbing thrust due to blanking and dirty air.

But

 at least in cruise the whole thing will clean up once it cools down
 again.
 > ...Chrissi

 It is not Chrissi. NACA scoops are not recommended for radiators.

 Paul Lamar

[Todd TC. Carrico]
FWIW, I was planning on using one Armpit for Throttle Body, One for Oil
Cooler, and the NACA (Now I guess a P-51 Style) on the bottom to feed
the radiator.  My reasoning was that I could "Tune" each one independent
of the other.  May be a bit short sided, but I haven't seen anything
that would make me think it was a bad idea.  As long as the sum of the
inlets did not get out of hand...

I suppose the NACA inlets were conceived to feed the intakes of Turbine
engines, which generate a lot more pressure differential than a radiator
(read that as jets suck <grin>).

P-51 style should look pretty cool with a bent canard...And no I don't
have any drawings, hell all I got is a wing.

tc

 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org