New Swedish Fighter Jet
- Thread starter BlueOvalFitter
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Lol, I think you just made the case for me, so it was hardly overstated. Maybe understated.A bit overstated. I don't think Sweden claims blanket neutrality and does have some sort of association with NATO. They are not a member, but it is no coincidence that Sweden has always use the same ammunition calibers as NATO from their rifles to artillery...
Jackson_Slugger
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I'm not sure who you think is overstating it. It's not overstated by Swedes, at least not since the height of the Cold War. They are very clearly open about their relationship with NATO and bent towards the West...
It looked from a previous post like you said I had overstated it.
I saw a few claims that it can reduce the height, provide more control surfaces, give redundancy if a tail is damaged, and allow it to be canted (to reduce radar cross signature). There are probably more reasons that are more technical than I would be able to understand. I’ve seen video of an F/A-18 where each rudder’s tail went in a different direction. Supposedly both turned inward will help with takeoff by creating a downward force that will help rotate the nose up.
Yes, canting the rudders inward increases nose up at low airspeed. One of the Hornet’s many tricks.
There is a height limit for naval aircraft - it’s just a bit less than the height of the hangar deck and elevator doors.
So, for good yaw stability, you need a certain amount of rudder/vertical fin area for a given airplane size. You need a rudder effective enough for the job.
If you do it with a single tail, either that tail has to be able to fold (S-3 Viking), at the end of a long fuselage (RA-5C), a long, squat tail (F-4 Phantom)…or you go with a twin tail (F-14, F/A-18).
Look closely at an E-2. It has FOUR tails. Only three rudders, but four tails, in order to get enough area at that distance form the center of mass to create good yaw stability. I’m sure that fewer tails would’ve been simpler, but they would have to be taller, and then fold, so, four it was…
There is a height limit for naval aircraft - it’s just a bit less than the height of the hangar deck and elevator doors.
So, for good yaw stability, you need a certain amount of rudder/vertical fin area for a given airplane size. You need a rudder effective enough for the job.
If you do it with a single tail, either that tail has to be able to fold (S-3 Viking), at the end of a long fuselage (RA-5C), a long, squat tail (F-4 Phantom)…or you go with a twin tail (F-14, F/A-18).
Look closely at an E-2. It has FOUR tails. Only three rudders, but four tails, in order to get enough area at that distance form the center of mass to create good yaw stability. I’m sure that fewer tails would’ve been simpler, but they would have to be taller, and then fold, so, four it was…
It’s a passenger jet, but I heard he 747SP got a taller, narrower tail on a shorter plane to create a larger control surface to deal with a shorter fuselage.
Exactly. The Airbus 319 has a taller tail than the A 320 for precisely the same reason…
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