Insulation Type: Glass
Aircraft on which Glass has been used/found- A-10 (No dates available)
- Boeing 707 (No dates available)
- Boeing 727 (No dates available)
- Boeing 737 (No dates available)
- C-130 Hercules (No dates available)
- DC-8 (No dates available)
- DC-9 (No dates available)
*Note: Some of the older aircraft types of insulation may have replaced by the original wire. The listings of aircraft are not complete, especially with those special uses, e.g., engine areas, electronic boxes, etc.
Mil Specs and other Standards using Glass- BMS 13-13 (Boeing)
- MIL-W-5086/2
- MIL-W-22759/1
- MIL-W-22759/2
- MIL-W-22759/3
- MIL-W-22759/4
- MIL-W-25038/1
- SAE-AS22759/1
- SAE-AS22759/2
- SAE-AS22759/3
- SAE-AS22759/4
Advantages: (Glass only)
Very high softening temperature
Inexpensive
Excellent insulator
Advantages (used with composite construction wire):
Good resistance to chafing
Claimed to have an upper temperature limit of about 1100 C
Claimed the wire is flexible
Claimed that the wire has good chafing resistance
Claimed to be about 1/3 lighter than corresponding original equipment wire
Disadvantages: (Glass only)
Somewhat inflexible
Heavy
Limited specification information from the manufacturer
No indication of a military or similar specification from the manufacturer
Manufacturer appears pointing to the replacement market for limited use in hostile environments
Disadvantages (used with composite construction wire, i.e., Nylon and PVC):
Out-gassing of harmful HCl
Loss of Dimension and Weight over time
Produces harmful gasses and smoke when it burns
Very heavy: 6.8 pounds/1000 feet (10 kg/km)
6.3 pounds/ 1000 ft (9.3 kg/km) without a glass insulator layer
In some instances the nylon has been shed due to splitting from manufacturing flaws
Other Information: Composite insulation with PVC and Nylon only (MIL-W-5806/1) also used in aircraft wiring
Glass is a braid when used in this wire
Maximum temperature 105o C for use in wire
See also Nylon and PVC
Efglas has PTFE tape with PTFE impregnated fiber glass
Efglas is rated up to 260o C
Outer shield uses 300 class stainless steel along with Inconel® (625 or 825) or Monel®
Currently produced for only a few aircraft types
Use of this product has received STC approval from the FAA