Unmanned aerial vehicle protecting cylinder rear cover

The invention relates to an unmanned aerial vehicle protecting cylinder rear cover, and belongs to the technical field of transmission. According to the unmanned aerial vehicle protecting cylinder rear cover, the rear cover is matched with other portions of a protecting cylinder, so that the protecting cylinder is watertight, a breaking portion of the rear cover can be rapidly, reliably and safelyopened under the action of booster gas pressure, drainage of combustion-gas flow is achieved, the breaking portion is submerged into water, residues on the water surface are omitted, the rest portions of the rear cover can bear the action of combustion-gas flow loads, states of the rest portions are completely good in the launching process, four tail fins are symmetrically arranged on the rear cover, and the posture of the protecting cylinder keeps stable by the aid of the tail fins. 本发明涉及种无人机保护筒后盖，属于发射技术领域。本发明设计的种无人机保护筒后盖，后盖与保护筒其他部分相配合，实现了保护筒的水密；后盖冲破部位在助推器燃气压力的作用下可快速、可靠、安全地开启，实现燃气流排导，冲破部分沉入水中，水面上没有残留物；后盖其余部分能够承受燃气流载