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MATERIALS IN HIDDEN AREAS

This report details the testing of materials used in hidden areas of aircraft, specifically focusing on aircraft cockpit and cabin components. Various thermoplastics and laminated panels, including glass/phenolic composites, were evaluated for their performance under standardized radiant panel test conditions. Key findings include ignition times, burn durations, and the behavior of insulation blankets and wire bundles with attachment clamps made from polyamide. The results indicate potential risks and performance dispersion, informing future material selection and design improvements in aerospace applications.

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MATERIALS IN HIDDEN AREAS

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  1. MATERIALS IN HIDDEN AREAS RADIANT PANEL TEST RESULTS

  2. MATERIALS IN HIDDEN AREAS 1-MATERIALS CURRENTLY USED IN COCKPIT AND CABIN • TWO THERMOPLASTICS • LAMINATED PANEL GLASS/PHENOLIC-2PLIES • SANDWICH PANEL NIDA NOMEX+ 4 PLIES GLASS/PHENOLIC

  3. MATERIALS IN HIDDEN AREAS 2- Combination of an insulation blanket film pvf + 30 wires bundled with attachment clamps made of polyamide the attachment clamps meet the requirements of the vertical bunsen burner test 12 seconds

  4. MATERIALS IN HIDDEN AREAS RADIANT PANEL STANDARD TEST METHOD SIZE OF THE SPECIMEN : 15x 12 cm

  5. MATERIALS IN HIDDEN AREAS • IGNITION TIME : 60 seconds SIZE OF THE SPECIMEN: 50 X 17, 5 cm

  6. MATERIALS IN HIDDEN AREAS TESTS ON WIRES + ATTACHMENT CLAMPS + INSULATION BLANKETS FIRST RESULTS A LOT OF DISPERSION -14 or 30 wires bundled located on blanket with 2, 3 or 4 clamps separated at 2 to 5 cm - clamps melted after removing the pilot burner - The flame remains or not afterwards.

  7. MATERIALS IN HIDDEN AREAS • In some hidden parts the space out between two attachment clamps is less than 1,5 cm • scenario : 30 wires bundled + 5 clamps separated every 1 cm and located on the insulation blanket

  8. MATERIALS IN HIDDEN AREAS BEFORE THE TEST AFTER THE TEST

  9. MATERIALS IN HIDDEN AREAS During the test, the burner removed

  10. MATERIALS IN HIDDEN AREAS • 3 tests carried out : • film melted • cable ties melted and flames remained after removing the pilot burner • test 1 after flame time : 6 minutes 53 secondes • test 2 after flame time : 4 minutes 32 secondes • test 3 after flame time : 6 minutes 35 secondes

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