# Presentation: 400199

## Tim Marker

- Testing of Pre-ox PAN Calibration Materials

- FAA Technical Center

## Quick Review from July 2006 Meeting

- 3 Styles of TexTech Felt Materials Tested at FAATC and Boeing

- _Purpose of Tests_: To determine if a standard calibration material was
- available, which could be used to help identify problems in test results
- at any burnthrough laboratory.  TexTech Industries showed an interest
- in developing a specific material(s) that could be manufactured under
- tightly controlled conditions, in order to produce a more consistent
- product that would fail in a specified time period.

## Purpose-Built Materials Supplied by TexTech

- 362R: Stock material, used in previous round robins

- TTI produced 1 roll of 8 oz/yd2 fabric using Zoltek fiber to simulate the
- performance of the roll produced in November of 2005.  Although TTI used
- the same basic manufacturing methods, they did slow the machine down, and
- focused on good weight and thickness distribution for the roll.  Each blanket
- was weighed and mapped for aerial density.

## Slide 4

## Purpose-Built Materials Supplied by TexTech

- with a decrease in the fabric thickness.  This produced a fabric with a higher
- density (g/cc) than the previous trails.  The trial has increased fabric layers.
- Again, the draft was reduced to increase the consistency and reduce any
- visible windows.

- Material 8579, slightly heavier 10 oz/yd2

## Slide 6

## Purpose-Built Materials Supplied by TexTech

- Zoltex Fiber in order to extend the burnthrough time slightly and gain a
- greater understanding of the system.  The trial increased the number of individual
- batt layers from 15 to approximately 23 in order to increase the overall
- homogeneity of the material and hopefully provide a predictable burnthrough
- time.  The draft was also reduced to "0" if possible to increase the consistency
- and reduce any visible windows.

- Material 8580, slightly heavier 10 oz/yd2

## Slide 8

## Interim Findings from Calibration Trials (July 2006)

- % Standard Deviation for Material 362R = 8.7

- % Standard Deviation for Material 8579 = 4.6

- % Standard Deviation for Material 8580 = 6.0

## Outcome and Planned Activities from July 2006 Meeting

- from previous trial.  One additional material would also be included (8611R).

- TexTech Felt Style 8579 showed most consistent results of 3 materials
- when tested at FAATC.  Boeing results for these materials not discussed at
- July 2006 meeting.

- Majority of Subgroup participants were encouraged at consistency of
- Style 8579; participants from Boeing requested additional trials be conducted
- at FAATC.

- 4.  Purpose of testing at FAATC twofold:

- a. Determine if consistency of 8579 is repeatable batch-to-batch

- b. Use test results from original burner to check correlation of new burner

## October 2006 Trials at FAATC

- 2 styles of materials supplied by TexTech (8579R and 8611R).

- 2 batches supplied for each material.

- 1 batch of each material tested on original FAA burner.

- 1 batch of each material tested on new sonic burner.

- Additional material became available for running quality checks on each
- new sonic burner as it was assembled.

## October 2006 Trials at FAATC

## October 2006 Trials at FAATC

## Slide 14

## Slide 15

## Slide 16

## Relationship of Blanket Density and Failure Time

- Question: Do the longer burnthrough failure times correlate to an increased
- blanket density?

- TexTech Industry agreed to supply all weight and thickness data for each
- sample tested in the trials.

- Weight and thickness data only supplied for first batch of material 8579R.

## Slide 18

## Slide 19

## October 2006 Trials at FAATC

- original burner.

- Test results indicated no correlation between increased burnthrough time and
- increased blanket density.

- Test results from 8611R indicated comparable consistency to 8579R*.

- *when data removed for tests using old clips