本文介绍有尾翼弹丸底排减阻效率的初步研究结果。模型为四片十字尾翼及四片圆弧尾翼.实验M数为1.8和2.5. 实验结果表明,有尾弹丸底排减阻效率显著低于无尾弹丸。在所实验M数范围内可达50%左右。本实验采用富燃固体底排药剂做燃料,有别于国外的冷排气研究.本文对二者进行了分析比较. This paper describes the tail fin projectile drag reduction efficiency of the preliminary results. The model is four cross empennage and four arc empennages.The experimental M numbers are 1.8 and 2.5.The experimental results show that the drag reduction efficiency of the bottom projectile is significantly lower than that of the tail projectile. In the experimental M number of up to about 50%. In this experiment, a fuel-rich solid bottom discharge agent is used as a fuel, which is different from the research on cold exhaust gas in foreign countries.This paper analyzes and compares the two.