CATAPULT, AIRCRAFT PERSONNEL M1 AND CARTRIDGE, CATAPULT M28,
Abstract
During high temperature proof testing of several lots of T4E1 production catapults, three catapults were observed to malfunction. In these the telescoping tube collapsed, preventing exit of the inside tube. The weight was ejected at a lower than normal velocity. Subsequent study of this phenomenon showed that it could occur only at the elevated test temperature (+135 C) and only when the diametral clearance between outside and inside tubes was near or outside the extreme of tolerance in this direction. In the intensive examination and tests of production catapults it was shown that only a very small percentage of production lots were sensitive to this effect. The T95E2 cartridge, standardized as the M28 cartridge, had its charge increased from 77.4 grams to 84.5 grams of I0W-6030 propellent powder with 65 grains of A1 black powder igniter to yield an ejection velocity well in excess of the minimum requirement. The modified catapult, which was standardized as the M1 catapult, has performance characteristics even superior to those of the T4E1 type.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1950
- Accession Number
- AD0492741
Entities
People
- C. Walt Musser
- S. D. Rolle