4 ms·

I study aerodynamics, so some comments: - vertically-stacked wings (biplanes, triplanes) are common, but I've never seen 3 non-stacked wings. Not even the Nazi

I study aerodynamics, so some comments: - vertically-stacked wings (biplanes, triplanes) are common, but I've never seen 3 non-stacked wings. Not even the Nazis were doing that, which is a red flag for this project actually. (I think it was France that passed a law that airplanes required at least 2 stacked wings around WW1, as monoplanes had too many structural failures at the time.) - more wings mean more lift, but also more drag - one advantage of more wings is that airports support only certain wing spans, so winglets or more wings is a work-around for that. (The result of winglets is mainly to effectively lengthen wing span.) - very thin wings aid in penetrating the sound barier. This is a subsonic plane in terms of speed, but more accurately it's a transsonic plane (mixed subsonic and supersonic) over certain parts. - I don't see the second engine, but if it has two, that's adequate for most oceanic operations because other small jets are allowed to do that, and ETOPS. (If ETOPS regulations apply, then engine reliability history is examined.) - If the engines are too close together, then an uncontained engine explosion can destroy the other. This is fairly common for engines mounted near each other.)

chis 5y ago
I thought the problem with multiple wings is that the first one pushes air downward (to induce lift), and then the proceeding wings get caught in the downdraft. Just looking up pictures of planes with multiple wings, it seems like it's common to put the first wing at the bottom of the fuselage and then the second wing at the top. The theory being that the second wing will be above the downdraft and able to provide lift. Anyways it looks like this company is generally considered to be a scam so I don't think this is much more than a 3D render.
- redis_mlc 5y ago
  > I thought the problem with multiple wings is that the first one pushes air downward (to induce lift), and then the proceeding wings get caught in the downdraft. Biplanes do increase lift, but there's always tradeoffs. The main problem with them is the struts add drag, as well as two wings above each other. Some biplanes stagger the top and window wing, like the Staggerwing: https://en.wikipedia.org/wiki/Beechcraft_Model_17_Staggerwing https://en.wikipedia.org/wiki/Beechcraft_Model_17_Staggerwin...

chis 5y ago

I thought the problem with multiple wings is that the first one pushes air downward (to induce lift), and then the proceeding wings get caught in the downdraft. Just looking up pictures of planes with multiple wings, it seems like it's common to put the first wing at the bottom of the fuselage and then the second wing at the top. The theory being that the second wing will be above the downdraft and able to provide lift. Anyways it looks like this company is generally considered to be a scam so I don't think this is much more than a 3D render.

redis_mlc 5y ago
> I thought the problem with multiple wings is that the first one pushes air downward (to induce lift), and then the proceeding wings get caught in the downdraft. Biplanes do increase lift, but there's always tradeoffs. The main problem with them is the struts add drag, as well as two wings above each other. Some biplanes stagger the top and window wing, like the Staggerwing: https://en.wikipedia.org/wiki/Beechcraft_Model_17_Staggerwing https://en.wikipedia.org/wiki/Beechcraft_Model_17_Staggerwin...