Tim Marker Round Robin 5 Test Results for Proposed Insulation Burnthrough Test Standard FAA Technical Center.

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Tim Marker Round Robin 5 Test Results for Proposed Insulation Burnthrough Test Standard FAA Technical Center

Special Thanks to the following contributors: Orcon Corportion TexTech Industries Johns-Manville Osaka Gas Facile Holdings Dupont The Mexmil Company

Objective: To identify problems with the test and equipment through systematic testing of identically-prepared samples. Progress: Several problems have been identified, analyzed, and corrected Burner components (stators and fuel nozzle) Burner configuration (angle of stator, distance between stators) Method of calibration (timing) Impact of altitude Round Robin Testing Goal: Perfect correlation between all labs

Round Robin 5 (Material A) Fiberglass, 2 Layers, 0.60 lb/ft 3 (Material C) Fiberglass, 2 Layer/Pre-Ox PAN felt, 1 Layer (Material D) Oxidized PAN, 2 Layers, 0.47 lb/ft 3 (Material B) Fiberglass, 2 Layer/Aramid Felt, 2 Layers (Material E) Heat Stabilized, OPF, 2 Layers, 0.60 lb/ft 3 (Material F) Heat Stabilized, OPF, 3 Layers, 0.42 lb/ft 3

RR5 Testing Sequence

Summary First test series since recalibration of all heat flux transducers by FAATC; interlab calibration heat flux data correlation increased over previous RR. However, actual test results indicate no correlation between calibrated heat flux and measured burnthrough time (i.e., high HF does not equal short BT time) First test series since request for recalibration of air velocity meters; how many were actually recalibrated? Initial results indicate higher than expected data scatter. Possible cause(s) of this include: 1. Differences in burner air flow as a result of measurement technique 2. Characteristic of certain types of materials 3. Equipment-related malfunction 4. Operational-related malfunction (interpretation of failure)