To match conditions similar to those expected from the high speed flight, a blowtorch will be used to heat small samples while a thermocouple will monitor the surface temperature of the materials. After the test we will also be measuring the samples to estimate the ablation. A stand has been built to hold the propane blowtorch at a specific distance from the samples and a remote trigger mechanism allows operators to be a safe distance from the blowtorch and sample.
The tests will be performed in a secure environment (blast chamber) and the operators will wear respirators during the tests. This document from Apogee Components was used as inspiration for this test procedure. Apogee Newsletter
Materials Used:
- Fiberglass
- West Systems 105 epoxy (resin + hardener)
- Phenolic microballoons
- Worthington propane blowtorch (14.1oz)
- Arduino Uno
Thermocouple Amplifier MAX31855 breakout board (MAX6675 upgrade): https://www.adafruit.com/product/269
K-type thermocouple: https://www.adafruit.com/product/270
Jumper wires
- Breadboard
- Test stand
Below is the matrix for samples used in this thermal test.
| 5-Layer Fiberglass | 10-Layer Fiberglass | |
|---|---|---|
| Control (West Systems epoxy) | ||
| West Systems + Phenolic microballoons | ||
| West Systems + Cork microballoons | ||
| West Systems + High temperature paint | ||
| West Systems + Cotronics 4700 |
Below is the test matrix for the parameters measured during this test. (Fill later with results).
Test Stand
<insert pics>
Setting up thermocouples
Samples
Test Procedure:
Testing in blast chamber
Heat for 12 seconds
