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为了支援空军系统司令部空间与弹道系统局(即现在的弹道导弹局)对最近参加飞行试验的带缠碳酚醛防热层材料进行滚动力矩和热力学性能的鉴定工作,并为以后的飞行试验选择防热层材料,曾经进行了一系列地面试验。本文叙述了这些地面试验所得到的数据。通过这些地面试验鉴定了用作防热层原始材料的人造短纤维和AVTEX人造长纤维的性能。本文还把所研究的这两种材料和在以往十年飞行过的IRC FM5055A防热层材料作了比较。采用三种不同的电弧加热设备来模拟部分再入环境。文章着重对IRC FM5055A和AVTEX FM5055G防热层材料进行了比较。这两种材料都是浸渍酚醛树脂并充填碳粒子的用人造长纤维编织的材料。对于未充填碳粒子的AVTEX长纤维材料也在有限的范围内作了鉴定。试验结果表明,AVTEX FM5055G材料无论从防热性能来看,还是从滚动力矩性能来看,都可以很好地取代IRC FM5055A材料。
In support of Air Force Systems Command’s Space and Ballistic Systems Agency (now the Ballistic Missile Board), identification of rolling torque and thermodynamic properties of the most recently tested aerodynamic entangled phenolic sheet material was conducted and for future flight test options Heat-proof material, has conducted a series of ground tests. This article describes the data obtained from these ground tests. Through these ground tests, the properties of staple fibers and AVTEX staple fibers used as a raw material for a heat-resistant layer were identified. This article also compares the two materials studied with those of the IRC FM5055A heat-insulating layer that flew over the past decade. Three different arc heating devices were used to simulate partial reentry. The article focuses on the IRC FM5055A and AVTEX FM5055G heat-proof layer materials were compared. Both materials are man-made long fiber braided materials impregnated with phenolic resin and filled with carbon particles. AVTEX long fiber materials that are not filled with carbon particles have also been identified to a limited extent. Test results show that, AVTEX FM5055G material in terms of thermal performance, or from the rolling torque performance, can well replace the IRC FM5055A material.