Quick View
BMS 8-79 is a Boeing specification covering glass fabric reimpregnated low-temperature-resistance epoxy resins (prepregs).
It is closely linked to BMS9-3, which covers the fabric reinforcement linked with its products.
This specification covers low temperature prepregs, unlike BMS 8-139, which covers high temperature prepregs.
Class designation is based upon mechanical property capabilities at elevated temperatures.
a. Class I – Obsolete – Use Class III
b. Class II – Obsolete – Use Class III
c. Class III – Material shall possess elevated temperature mechanical properties meeting requirements specified in Table II and Table V of the specification.
d. Class IV material shall possess mechanical properties which meet the requirements listed in Table IV and Table VI.
The style is based upon the fabric reinforcement used.
| Designation | Fabric Reinforcement | Obsolete Designation |
|---|---|---|
| Style 120 | Type D, Style 120 | Type 120 and 0 |
| Style 220 | Type D–1, Style 220 | None |
| Style 1543 | Type F–2, Style 143–150 | Type 1543, 43 and 143 |
| Style 1581 | Type H–2, Style 181–150 | Type 1581, 1 and 181 |
| Style 7781 | Type H–3, Style 181–77 | Type 7781 |
| Style 1582 | Type J–2, Style 182–150 | Type 1582, 2 and 182 |
| Style 1584 | Type K–2, Style 184–150 | Type 1584, 4 and 184 |
