Re: Απάντηση: Air Force Planes
Αυτό μου φάνηκε περίεργο και το έψαξα στην quora. Τέτοια "περίεργα" θέματα έχουν συνήθως απλές εξηγήσεις. Η σκουριά λοιπόν μάλλον είναι επειδή το άφησαν χωρίς συντήρηση για πολλούς μήνες ώστε να τεστάρουν τα αποτελέσματα του "άβαφου" αεροπλάνου στο στίγμα που δίνει στα ραντάρ. Δηλαδή βασικά πρόκειται για πειράματα με τη μπογιά που το κάνει stealth.
(στο παρακάτω, RAM = Radiation-absorbent material)
===================
https://www.quora.com/Why-are-some-...t-rust-stains-are-running-down-from-the-bolts
That is actually rust. But, it is not coming from bolts or any other structural members. It is coming from the RAM coating.
The RAM coating is a matrix with many tiny ferrite spheres incorporated. Those spheres are partially responsible for the RAM ability to absorb and dissipate the radar signal.
When the spheres are embedded in the matrix, they are protected from corrosion. But when the matrix cracks or falls off, the ferrite is exposed to air and they rust. Nothing too serious, but it looks terrible. Look carefully at the picture, you'll notice all cracks rusting.
The degradation of the RAM coating is a known problem. Its maintenance is one of the reasons for high operating cost. The fact that this close-up picture was even allowed indicates that this aircraft was part of a test to determine rate of decay of the RAM coating. The exposed screws would be an unacceptable radar return and would probably keep this aircraft from flight ops.
The F-35 uses some sort of baked in RAM material which is basically zero maintenance. A lesson learned. And, I've just heard of a new material for the F-22, a fiberous matt RAM coating, that resists degradation.
https://www.autoevolution.com/news/...s-to-an-f-22-raptor-fighter-plane-136404.html
150 μυρια αεροπλανακι(.... the crown jewel of US air-force !!! :flute
Αυτό μου φάνηκε περίεργο και το έψαξα στην quora. Τέτοια "περίεργα" θέματα έχουν συνήθως απλές εξηγήσεις. Η σκουριά λοιπόν μάλλον είναι επειδή το άφησαν χωρίς συντήρηση για πολλούς μήνες ώστε να τεστάρουν τα αποτελέσματα του "άβαφου" αεροπλάνου στο στίγμα που δίνει στα ραντάρ. Δηλαδή βασικά πρόκειται για πειράματα με τη μπογιά που το κάνει stealth.
(στο παρακάτω, RAM = Radiation-absorbent material)
===================
https://www.quora.com/Why-are-some-...t-rust-stains-are-running-down-from-the-bolts
That is actually rust. But, it is not coming from bolts or any other structural members. It is coming from the RAM coating.
The RAM coating is a matrix with many tiny ferrite spheres incorporated. Those spheres are partially responsible for the RAM ability to absorb and dissipate the radar signal.
When the spheres are embedded in the matrix, they are protected from corrosion. But when the matrix cracks or falls off, the ferrite is exposed to air and they rust. Nothing too serious, but it looks terrible. Look carefully at the picture, you'll notice all cracks rusting.
The degradation of the RAM coating is a known problem. Its maintenance is one of the reasons for high operating cost. The fact that this close-up picture was even allowed indicates that this aircraft was part of a test to determine rate of decay of the RAM coating. The exposed screws would be an unacceptable radar return and would probably keep this aircraft from flight ops.
The F-35 uses some sort of baked in RAM material which is basically zero maintenance. A lesson learned. And, I've just heard of a new material for the F-22, a fiberous matt RAM coating, that resists degradation.
... πτερυγας μεταβλητης γεωμετριας (οπως ακριβως μ'αρεσει).
roud: ....
