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  1. Doggzilla

    Raptor Composite Aircraft

    Perhaps he flew alone because he did not want the distraction of a crowd. Or perhaps he was aware of how many aircraft kill their creators on first flight and didn’t want his body dumped on the runway in front of his friends and family like the test pilot of the Kasperwing. Regardless, it’s an...
  2. Doggzilla

    Raptor Composite Aircraft

    But the experts here say there are no control problems with Rutans. How can they need Vortilons if they don't have control problems?
  3. Doggzilla

    Raptor Composite Aircraft

    The great thing about automotive engines is that they get free vacuum boost. Master cylinders are great stuff. Reliable, light, and redundant. Since most tech trickles down and not up in the aerospace industry they never became common. But they are perfect for small aircraft with piston engines.
  4. Doggzilla

    Raptor Composite Aircraft

    So it has pitch instability. Gee, if only someone had predicted this. As for his cooling issues, after installing the oil cooler he can easily install exhaust fans to pull air through the radiators. He will have to install them slanted inside the duct, but they will work. The auto variant of...
  5. Doggzilla

    Tacit Blue's Airfoil

    The problem is that the engines can still be spotted head on or by any aircraft not directly in front of it. And the F-35 has a datalink with ships that allows them to fire missiles from 200 miles away. Those missiles take a ballistic trajectory and come in from above the maximum radar...
  6. Doggzilla

    Tacit Blue's Airfoil

    That’s the J-20 you are thinking of. The media keeps using the wrong pictures. The J-31 is the F-35 copy with Flanker engines.
  7. Doggzilla

    Tacit Blue's Airfoil

    The real challenge is the engines and thermal stealth. We captured a Chinese spy who gave them the engine designs for the B-2 and they still haven’t been able to reproduce them yet. In fact, they have a fighter with the nose of an F-35 but has to use a pair of old Soviet engines because they...
  8. Doggzilla

    Tacit Blue's Airfoil

    And since we are on the topic, the Iranians copied that stealth drone they captured years back, and the Israelis shot one down over Syria. That is very impressive for both sides. Iran has a much more advanced aerospace industry than expected. And the Israelis as well if they can detect it.
  9. Doggzilla

    Tacit Blue's Airfoil

    That is very fascinating. I heard about such a program back when that F-117 was shot down. Some mission analysts hadn’t been checking the flight plans and allowed several aircraft to fly identical routes instead of the random routes the program was designed to create, which is why the Serbs...
  10. Doggzilla

    Tacit Blue's Airfoil

    The curvature of the airfoil has nothing to do with computational power. It’s a material issue. Curved surfaces on stealth aircraft are possible by using a graphite mixture in composite skin, or is accomplished by placing an aerodynamic composite cap over a faceted surface. In fact, the...
  11. Doggzilla

    Raptor Composite Aircraft

    Someone else who has worked with composite aircraft stated that Raptor crew used thicker carbon than anything else he's ever seen, including thicker than full size turboprops.
  12. Doggzilla

    Raptor Composite Aircraft

    You guys should know by now that if I’m saying I’ve read something...I’ve actually read it. This is probably the 8th time this has occurred. Here are the unexplained loss of control from the VariEze alone. Corkscrew/spiraling are a sign of elevator becoming divergent while pulling into a turn...
  13. Doggzilla

    Raptor Composite Aircraft

    Just off the top of my head there have been two different unexplained fatalities since this thread began. One with a loss of control crash in the pattern, and another where an experienced canard pilot crashed taking an aircraft home after a purchase. And one of the pilots who flew the same model...
  14. Doggzilla

    Raptor Composite Aircraft

    You mean like the Rutans which keep having unexplained loss of control crashes?
  15. Doggzilla

    Raptor Composite Aircraft

    That is the divergence I have been talking about. Now that it’s been confirmed by his own comment it needs to be taken more seriously. The problem is not entirely from the elevator. The same elevator is only mildly dangerous on the Rutan, but the Raptor has a far wider fuselage, which adds...
  16. Doggzilla

    Raptor Composite Aircraft

    That assumes that its upright and that it will stall before it becomes inverted or the aircraft is destroyed by the G force. At high speeds it can rip the wings off before it stalls, and during turns in can corkscrew the aircraft at maximum turn rate (Get stuck in a turn that looks like a wine...
  17. Doggzilla

    Raptor Composite Aircraft

    Split canard is a canard where the front half is fixed instead of having a fully moving canard. The fixed portion of the split canard causes a slight divergence, as pulling the nose up increases its angle of attack. The further nose up the higher the AoA for the fixed portion, as it’s aligned...
  18. Doggzilla

    Raptor Composite Aircraft

    Wait wait wait, everyone back up. Someone died flying a Rutan canard with the same split canard layout because it was unstable in pitch? I recall being mocked and dismissed for pointing out split canards suffer from divergence and control inversion any time the AoA exceeds the downward...
  19. Doggzilla

    Raptor Composite Aircraft

    Yes, that is correct. I wa So basically 14,000lbs from 50mph. And I think we can all agree one set of brakes isn’t going to stop that kind of force when it would usually have 4 sets on most vehicles.
  20. Doggzilla

    Raptor Composite Aircraft

    Roughly the same as 7000lbs from 50 and that will easily fry two pads. 7000lbs usually has 8. Trying to stop that much force with 2 is going to wear them out extremely quickly
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