The Piasecki X-49 " SpeedHawk " is an American four-bladed, twin-engined experimental high-speed compound helicopter developed by Piasecki Aircraft. The X-49A is based on the airframe of a Sikorsky YSH-60F Seahawk, but utilizes Piasecki's proprietary vectored thrust ducted propeller (VTDP) design and includes the addition of lifting wings.

X-49A“速度鹰” (Speedhawk)是由美国军方提供经费开发的高速直升机技术验证和发展项目，目标是通过对直升机动力系统的改进设计，大幅度提高现役直升机的飞行速度、作战半径、飞行性能和任务灵活性。 X-49A最初的计划是作为海军执行扫雷任务的一个潜在的平台，而美空军则计划用X-49A的技术来改进HH-60直升机，用于执行“战斗 搜索 和救援” (CSAR)任务，并且可以凭借高速度的优势扩大军用直升机的应用范围。 X-49A的背后寄托着美国陆、海、空三军对高速直升机的 …

Preliminary design started in February 2016, with the X-59 planned to begin flight testing in 2021. After delays, as of January 2025, it is planned to be delivered to NASA for flight testing in 2025.

2019年4月17日 · X-49 速度鹰（Speedhawk）是一型实验性质的复合式直升机，该机的研制是用来论证美军现役的直升机能否突破200节（约360千米/时）的速度大关。 2000年10月份，美国海军航空系统司令部授予了Piasecki（皮亚塞基）公司一份演示验证合同，该合同约定将一架海军现役的YSH-60F海鹰直升机作为试验平台，将其尾桨改装为一套矢量推力涵道螺旋桨（VTDP；Vectored Thrust Ducted Propeller）系统。 在2004年，主要由于经费的问题，VTDP项目（如今成为X …

2020年3月8日 · For the American military, it is seeking to develop a compound helicopter product that can consistently exceed 230 miles per hour while displaying inherently strong range, reliability, and survivability qualities for the modern battlefield. Funding initiatives have been enacted to prove a design sound for possible large-scale future application.

2015年8月8日 · Dubbed the X-49 SpeedHawk, it certainly lives up to its name. Thanks to the lift generated by the wings, a significant load is removed from the main rotor, allowing for a 50% increase in forward speed. The entire airframe now being optimized for speed means that the landing gear retracts into the fuselage, and unnecessary protrusions are minimized.

2007年6月8日 · 被Piasecki命名为“速度鹰”的X-49是由美陆军航空应用技术部提供资金发展而来的，以验证将现有直升机速度提高到200节（360 km/h）的能力。 VTDP替代了尾桨并提供向前飞行的推力，同时机翼减轻了旋翼的负荷并允许直升机飞得更快。 公司副总裁John Piasecki表示，最初验证机将在SH-60目前的飞行包线范围内进行飞行，随后公司计划增加第三台发动机，以使直升机飞到200节。 机务在线航空资讯休闲娱乐X-49“速度鹰”直升机即将首飞由Piasecki公司改进的 …

The Piasecki X-49 " SpeedHawk " is an American four-bladed, twin-engined experimental high-speed compound helicopter developed by Piasecki Aircraft. The X-49A is based on the airframe of a Sikorsky YSH-60F Seahawk, but utilizes Piasecki's proprietary vectored thrust ducted propeller (VTDP) design and includes the addition of lifting wings.

2024年1月12日 · As NASA's newest X-plane, the X-59 is designed to break the sound barrier without the thunderous sonic booms that typically occur when aircraft go supersonic. Instead, the Quesst will make a much...

X-49A是在SH-60F“海鹰”直升机上加装机翼及矢量推力涵道螺旋桨推进器 (VTDP)的复合直升机，技术目标是提高现役陆军直升机的速度、航程和飞行高度，并且在需要的时候可以利用X-49A的技术对现有直升机进行改进设计，这就决定了X-49A利用现役直升机改造的特点。 X-49A在2007年6月30日的首飞，是提高直升机飞行速度的长期努力的新成果。 X-49A在首飞的15分钟里进行了基础的悬停、转弯和低速度下的前飞和侧飞，成功证明了使用VTDP可以提供有效的配平能力， …