一 | MEXICO CITY -- A local security secretary and 12 police officers were shot dead in Guerrero state Monday, authorities said, the worst episode in a day of violence across southwestern Mexico that killed at least 19 people.Another person was slain in the Guerrero state capital and five people, including a police officer, were killed in the neighboring state of Michoacan, officials said.Eleven people were initially reported killed in the attack in El Papayo, which is in the Guerrero township of Coyuca de Benítez on the Pacific Coast. Hours later, the state prosecutor's office said two more police officers had died.The secretary for security of Coyuca de Benítez was among those slain, said Gabriel Hernández Mendoza, state deputy prosecutor for investigations. He gave no further details.Rigoberto Acosta González, an academic and community leader, was reported shot to death in Chilpancingo, the Guerrero state capital 60 miles (95 kilometers) northeast of Coyuca de Benitez.In Michoacan, north of Guerrero, at least five people, including a police officer, were fatally shot and two others were injured, the office of the state’s attorney general said on X, formerly Twitter.Officials are finding themselves increasingly endangered in the region, where several powerful drug cartels continue to fight for control. According to figures from Common Cause, 341 police officers have been killed in Mexico so far this year. In 2022, at least 403 were slain.In the Michoacan incident, the bodies of the five slain people were found on a highway in the township of Tacambaro after an attack targeted the mayor's brother. The state prosecutor's office did not say if the mayor's brother was among the wounded.A video of the attack circulating on social media appeared to show heavy gunfire, followed by at least five armed men running to board a pickup truck.Despite the government sending more than 2,000 National Guard troops and military personnel last month, Michoacan remains one of the deadliest states in Mexico, according to the national security department.Several criminal groups are known to operate in the region, including the powerful Jalisco New Generation cartel, the Familia Michoacana, the Viagras and the Knights Templar.Gun violence has also spilled over into neighboring areas. On Sunday, a shootout at an illegal horse race killed five people and wounded five others in Queretaro, a central state on the northeastern border of Michoacan.。
二 | 10月19日消息，近日，蓝箭航天“天鹊”真空型液氧甲烷发动机（ TQ-15A）在湖州成功完成了首次全系统热试车，试验时长20秒，试验过程中发动机起动关机正常、工作平稳。据介绍，TQ-15A为目前国内推力最大的真空型液氧甲烷发动机，真空推力达836千牛，是朱雀二号火箭第二批次的二级主发动机。与现有80吨+10吨的二级发动机布局方案相比，取消了游动发动机TQ-11，主发动机由不摇摆改为泵前摆，降低了二级发动机系统复杂度，总重量减轻约400千克，推力室进一步增大喷管面积比，并将涡轮排气引入推力室大喷管进行冷却，解决了涡轮排气引起的干扰力问题。
三 | TQ-15A发动机真空推力提高9%、真空比冲提高130米/秒，推力调节范围拓宽至55%~110%且具备三次起动能力，可大幅提升火箭发射任务的适应性。
四 | 本台TQ-15A发动机为带伺服机构不带大喷管状态，本次试车重点考核发动机系统、总装和各组合件改进方案的可行性，验证起动关机时序的正确性，获得发动机的实测性能数据及工作特性，发动机按预定程序起动和关机、工作平稳，达到了预期设计目标。本轮试车计划开展5次试车（含两次多次起动）、累计试车时间970秒，首次试车结束后将继续考核发动机长程工作可靠性、大范围推力调节时的工作适应性、发动机与伺服系统的工作协调性，多次起动、高低入口压力及过冷推进剂等各种条件下的发动机的工作适应性，全面验证发动机设计方案，并获得大喷管条件下发动机的性能数据。
五 | 朱雀二号运载火箭自2017年9月立项至今，已完成了第一批次火箭技术状态的研发工作。目前，朱雀二号Y1火箭已出厂并完成低温加注合练，Y2火箭的总装工作正在嘉兴蓝箭航天中心进行。
六 | 在此基础上，公司研发团队对第二批次火箭进行了研制迭代和优化改进，使之具备更优的性能和更高的可靠性。
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