member or casing is much stronger for the weight of the member and is less expensive to manufacture as for aging only metal is more age resistant but metal is more expensive more difficult to machine and is heavier aeroballistics requires light weight therefore fiber wound tubular members are the only members capable of maintaining the requisite gas pressure within the weight limits and my improved fiber wound tubular members with attachment openings are the only members that are capable of withstanding the requisite longitudinal loads a number of different types of tubes have been made up and have been tested for the amount of force capable of being transmitted through the attachment section of one fiber wound tubular member to another fiber wound tubular member or to a metal member the following is a tabulation of the results 2 for bonded structures assuming an average bond strength of 2 000 psi in a joint length of 1 inch 3 for integrally threaded structure assuming 3 000 psi for 0 75 inch length along axis 4 for drilled holes it was only possible to estimate the loading which appeared to be approximately one half the load of the integrally wound holes or in summary the forces transmitted using bonded structures integral threaded structures and drilled holes of approximately 14 000 16 000 and 12 500 are not considered sufficient for a.