小鹅Ⅳ发动机已经生产,用以替换小鹅Ⅱ发动机。所设计的小鹅Ⅳ不得超过小鹅Ⅱ的外廓尺寸。由于采用含6％铝粉的塑性推进剂装药(它被装入一个两端收口的发动机壳体内)使总冲增加12％在-20℃至+43℃温度范围内,该发动机能可靠地工作。已有665台小鹅Ⅳ发动机供三种主要地空导弹—警犬(英)、雷鸟(英)、海蛇(美)的研究和发展或鉴定试验之用。尚未发现按设计技术要求制造的发动机有什么故障或工作不正常。 Gosling IV engine has been produced to replace Gosling II engine. The design of the goose Ⅳ shall not exceed the size of the goose Ⅱ. The use of a plastic propellant charge containing 6% aluminum powder, which is housed in a two-ported engine case, increases the total impulse by 12% over the temperature range of -20 ° C to + 43 ° C. The engine can reliably jobs. 665 Gosling IV engines have been used in the research and development or qualification testing of three major SAMs, the Dogs, Thunderbirds and Sea Snakes. It has not been found engine designed according to the technical requirements of what is the fault or not working properly.