4 ms·

They did. Just not in aerospace until the mid 1960s when decent quality fibreglass (FR4) boards were available. The previous SRBP and Bakelite boards were fragi

by iasay 4y ago

They did. Just not in aerospace until the mid 1960s when decent quality fibreglass (FR4) boards were available. The previous SRBP and Bakelite boards were fragile and/or hygroscopic.

jaytaylor 4y ago
Hygroscopic, an interesting new word to me! Thank you :) > hy·gro·scop·ic > adjective > (of a substance) tending to absorb moisture from the air. relating to humidity or its measurement.
- Doxin 4y ago
  compare: hydrophobic