View: https://x.com/flyarcher/status/2079167522478125106?s=20
View: https://x.com/NatSecLedger/status/2079173262601298193?s=20
www.twz.com
View: https://x.com/NatSecLedger/status/2079173262601298193?s=20
Anduril Brings The Thunder With Autonomous Tiltrotor Attack Drone Concept
Anduril Brings The Thunder With Autonomous Tiltrotor Attack Drone Concept
Thunder is designed to fly deep into hostile airspace at low altitude as a highly autonomous wingman for AH-64 Apaches and MV-75 Cheyennes.
www.twz.com
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Recently made this, I have written some stuff about the F/A-18's ingenious rudder techniques which make it very stable to fly...
When the F/A-18 was designed, McDonnell-Douglas and Northrop forgot to consider ground effect. This meant that they did not consider that the lift curve of the wing will be reduced and since the tail is also quite low to the ground, it will also be affected by this.
When they did the first flight and later flight testing, it was noticed promptly as the plane simply refused to takeoff at the speed they calculated and gave to the pilots.
At the end, not wanting to redo the whole wing geometry just for better takeoff performance, they made a fix which involved the twin rudders doing a "toe-in" movement. As in they both point inwards.
This was not only required during takeoff but also in-flight. So they had to create a rudder scheduler which reacted instantly with AoA rise to coordinate a rudder toe-in or toe-out to provide positive longitudinal stability.
Without this, at high AoA the plane was fighting the pilot to pitch up even higher or
The fix was simple enough but uncovered a series of fixes that were unnoticed while initially developing the plane. This meant the entire FCS was revalidated.. It was incredibly expensive and added complexity.
The pitching movement coefficient tells the direction of the pitching tendency.
Source for graphs: MIT Aircraft Systems Engineering (Flight Controls) 2004
When the F/A-18 was designed, McDonnell-Douglas and Northrop forgot to consider ground effect. This meant that they did not consider that the lift curve of the wing will be reduced and since the tail is also quite low to the ground, it will also be affected by this.
When they did the first flight and later flight testing, it was noticed promptly as the plane simply refused to takeoff at the speed they calculated and gave to the pilots.
At the end, not wanting to redo the whole wing geometry just for better takeoff performance, they made a fix which involved the twin rudders doing a "toe-in" movement. As in they both point inwards.
This was not only required during takeoff but also in-flight. So they had to create a rudder scheduler which reacted instantly with AoA rise to coordinate a rudder toe-in or toe-out to provide positive longitudinal stability.
Without this, at high AoA the plane was fighting the pilot to pitch up even higher or
The fix was simple enough but uncovered a series of fixes that were unnoticed while initially developing the plane. This meant the entire FCS was revalidated.. It was incredibly expensive and added complexity.
The pitching movement coefficient tells the direction of the pitching tendency.
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U.S. Air Force Reveals Plans For VTOL Bomber Prototype
U.S. Air Force Reveals Plans For VTOL Bomber Prototype | Aviation Week
U.S. Air Force seeks a reusable rocket-powered VTOL strike aircraft prototype for future high-speed bomber missions.
aviationweek.com
The New Frontier Aerospace hypersonic aircraft takes off vertically, much like a rocket without stages. The aircraft then lands vertically where it can then be refueled for another flight.
Delta
Delta | USAvionix
A subsonic, jet-powered ISR drone built for speed, autonomy, and real-time intelligence over ranges of 300 to 500+ kilometers.
RTX Develops TJ150-Powered StormBreaker Precision-Guided Weapon for Extended-Range Strikes
RTX is preparing a turbojet-powered StormBreaker designed to extend U.S. strike range against moving targets in contested airspace.
www.armyrecognition.com