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Yup. Just like a parachute you can drag behind you. But I think this is just a rumor...
ca·nard
kəˈnär(d)/Submit
noun
1.
an unfounded rumor or story.
"the old canard that LA is a cultural wasteland"
2.
a small winglike projection attached to an aircraft forward of the main wing to provide extra stability or control, sometimes replacing the tail.
Seems the angle on the 991 is a bit steep....more like a speed brake than an aerodynamic assist.
Originally Posted by nwGTS
It definitely is which is why I thought it was funny. Totally useless as performance aero here.
I'm a little confused, maybe you, or anyone, can clarify for me. I did not think that the canards were intended as an aerodynamic assist. That is, they do not reduce drag. The upward tilt suggests they increase drag. The question is, and I don't know the answer, what is the cost of the increased drag? You are gaining down force on the front end, but is the added down force a benefit when weighted against the increased drag. This seems to be the universal conundrum that any (mechanical) part that adds down force also, by definition, adds drag.
Without any wind tunnel data it's hard to know but I'm thinking that, based on the track that you are running at, the engine is probably capable of overcoming the drag (drag increase as a function of speed, obviously) without much difficulty. Again, that is, top end speed may only be XYZ mph on a straight - but more important than top end speed would be time lost over the length of the straight. So, anything that provides a tangible down force benefit, particularly over the front wheels, may be a net positive. If you lose 1 second on a straight due to the added drag but gain that time back by being able to possibly go deeper into a turn without losing the front end, as well as increasing exit speed then the canards may be beneficial. But, I have no test data so who knows. They do sort of look pretty trick so maybe that is where the value is?
Yup. Just like a parachute you can drag behind you. But I think this is just a rumor...
ca·nard
kəˈnär(d)/Submit
noun
1.
an unfounded rumor or story.
"the old canard that LA is a cultural wasteland"
2.
a small winglike projection attached to an aircraft forward of the main wing to provide extra stability or control, sometimes replacing the tail.
#2 - Is anyone here a pilot/aeronautical engineer. I know what a canard on a plane is and what it does but the term "replaces the tail", can this be right? I mean, maybe they can replace the horizontal stablizers but wouldn't replacing the vertical stablizer make the aircraft inherently unstable (I'm thinking of all the surface control adjustments that a B2 needs to make to stay in the air).
Let's just say that I have worked/am working on many military jet fighters.
The purpose of the canard on the 911 is to increase down force on the front suspension for grip assist on straights and also high speed turns. On a military jet it is to increase turning performance normally in conjunction with thrust vectoring...which is the optimal setup. Some jets have one or the other with the exception of a couple of Russian jets that have both.
I have the FVD "dive planes" on my 911. Does it increase my cornering speed? No. Does it make the car faster? No.
Just for looks.....and I didn't rivet them on.
.....wait, if I add thrust vectoring to the 911 then?
A canard can be used to replace the horizontal stabilizer on the tail of an aircraft. The design has to be such that the center of gravity is forward of the center of lift of the wing. The canard is then a lifting surface. Google "Beechcraft Starship" to see an example of this.
These canards on the GT3 are to kill lift, not actually produce downforce. They make the turn in more stable in high speed turns. The pic of them on that 981 looks like they aren't installed correctly.
07-18-2016, 09:37 PM
Racing polyurethane Kanards
