originally posted by: yuppa
a reply to: mbkennel
That wasnt a black triangle of a UFO it was a small crack in the glass loks like to me.
Maybe it wasn’t clear that my comment was in reference to the Boeing patent of 2004. The Boeing patent has nothing to do with Black Triangles. It
refers to a perfectly conventional air vehicle that uses a combination of buoyancy and aerodynamic lift to maintain flight. I suggested that the
photo is of an air vehicle that would meet the functional requirements described in the Boeing patent namely, the ability to integrate “a very large
circular or elliptical transmission device” (that means an antenna) inside the skin of a hybrid vehicle.
I think you need to look at the photo closer and think a little deeper; the photo was not taken through a windshield.
First consider the context of the other car in the scene. This was taken in the UK, where drivers are located on the right side of the car, and
oncoming cars pass each other on the right. If the camera was located in a car at all, it could not have been in an oncoming car (relative to the car
that shows up in the photo) because that would have put the camera car driving in the wrong direction. Probably the photographer was in a car that
had been going the same direction as the car in the photograph and had pulled over into the parking lane to stop and take the photo. If the
photographer remained in her car, then her view of the object would have been the same as the view of the driver of the car that is shown in the
photo. As can be seen, the object is not visible through the windshield; you would have to look out the driver’s side window to see the object. If
the photographer decided to stay in her car to take the photo, then she obviously could have easily rolled the side window down. Or, she could have
got out of the car and stood by the side of the road.
In any case, the image of the object is clearly in sharp focus, as are, for example, other objects in the distance such as the ridgeline of the roof.
This indicates that the hyperfocal distance of the camera is tens of meters. If the camera was focused on a glass chip 10cm from the camera, the
distant objects would not be in clear focus.
Also, it looks to me as though the object has the same patterns of light and shadow as, for example, the clouds in the distance.
When you look at the object in the photo you see a windshield crack. When I look at it, I see a perfect, cambered, 4-digit series NACA airfoil
section with T/C of 0.2, and a radome superimposed on the underside of the airfoil, at the ¼ chord location. Why is that significant? By definition,
hybrid vehicles obtain lift from both buoyancy and aerodynamic lift of forward flight. They are not truly lighter than air. They are slightly
heavier than air when stationary and obtain the extra lift needed to stay aloft from forward flight speed. If they weren’t slightly heavier than
air, they couldn’t land and take off. The main design challenge of a hybrid air vehicle is controlling the placement of the lift vector that
results from buoyancy relative to placement of the lift vector that comes from aerodynamic lift. Bouyant lift acts through the center of buoyancy
(which usually corresponds roughly with the geometric center of the object) while aerodynamic lift (at subsonic speeds) corresponds with the ¼ chord
of the airfoil section.
If you look at a first generation hybrid air vehicle—a blimp—you will see that the gondola is located slightly forward of the geometric center of
the gasbag. Since the center of buoyant lift is at the geometric center of the bag, the forward location of the gondola produces a forward pitching
moment that causes the nose of the blimp to point downward. If you’ve ever seen a picture of a moored blimp where the tail line got away, you will
see it with its butt pointed skyward. When a blimp starts moving forward, the lift vector acts at a point ahead of the gondola, which creates a
pitching moment upward, which overcomes the downward moment due to the buoyant lift. Ideally, a well trimmed blimp balances the moments due to
buoyancy and aerodynamic lift at the cruising speed, so that minimal elevator input is required.
In the case of this object that was photographed over Halifax, UK, it looks like the designers chose to put the main payload (the antenna) directly
under the ¼ chord location AND to make that location the geometric center of the cross-section so that the weight of the vehicle, the buoyant lift of
the vehicle, and the aerodynamic lift of the vehicle all act through a single point. This creates a situation where the trim of the vehicle does not
change, regardless of whether the vehicle is moving or not. Simplifies the control logic and ground handling and eliminates the need for large,
highly visible tail surfaces.
The upper surface of the object is differently colored than the undersurface and is what I would conjecture is a hardback—where all the propulsion
is located. If you look carefully, there is actually a notch in the profile which I would assume is an intake/exhaust port, as seen from the side.