Republic XF-84H Thunderscreech | |
|---|---|
| 국가 | 미국 |
| 역할 | 실험용 전투기 |
| 첫 비행 | 1955년 7월 22일 |
| 내장 | 2 |
Tthe 공화국 XF-84H "Thunderscreech"는 F-84F Thunderstreak에서 파생된 실험용 터보프롭 항공기입니다. 초음속 프로펠러와 결합된 터빈 엔진으로 구동되는 XF-84H는 프로펠러 구동 항공기의 비공식 대기 속도 기록을 세울 가능성이 있었지만 공기역학적 결함을 극복하지 못해 프로그램이 취소되었습니다
| 공화국 XF-84H Thunderscreech 산책 | |
|---|---|
| 사진 작가 | 블라디미르 야쿠보프 |
| 로컬라이제이션 | USAF 국립 박물관 |
| 사진 | 93 |
참고 항목:
General Characteristics and Role
The Republic XF-84H Thunderscreech was an experimental high-speed propeller-driven aircraft developed for the U.S. Air Force in the mid-1950s. Its primary role was to test the concept of a propeller-driven aircraft capable of supersonic speed (exceeding Mach 1). It was a radical modification of the F-84F Thunderstreak fuselage, replacing the turbojet engine with a powerful turboprop engine driving a supersonic propeller. The aircraft is infamous for being one of the loudest ever built, earning it the nickname “Thunderscreech” and causing physical discomfort to ground crews due to the tips of its massive propeller blades consistently exceeding the speed of sound. Only two prototypes were ever built.
| Property | Typical Value (XF-84H) |
|---|---|
| 역할 | Experimental Supersonic Turboprop Fighter |
| National Origin | 미국 |
| 제조업체 | Republic Aviation Company |
| First Flight | 1955년 7월 22일 |
| 승무원 | 1 (Pilot) |
| 길이 | 15.68 m (51 ft 5 in) |
| 윙스 팬 | 10.21 m (33 ft 6 in) |
| Maximum Takeoff Weight | 13,600 kg (30,000 lb) |
Powerplant and Sonic Features
- Engine: 1 x Allison XT40-A-1 turboprop engine.
- Power Output: Approx. 5,850 hp (4,360 kW).
- Propeller: A massive 12-foot (3.66 m) diameter Aeroproducts constant-speed propeller with three large blades.
- Sonic Boom: The tips of the propeller blades consistently moved at speeds up to Mach 1.18 even at rest, generating a continuous, high-intensity sonic shockwave that was audible 25 miles (40 km) away.
- Maximum Achieved Speed: The aircraft never officially exceeded Mach 1, though it was designed for speeds up to Mach 1.05. The fastest measured speed was around 837 km/h (520 mph).
- Design Challenge: The high torque from the powerful turboprop required a vertical stabilizer extension beneath the tail to counter the rotational forces, similar to what was later used on the C-130 turboprop.
Program Outcome and Legacy
- Pilot Reports: Pilots reported severe engine vibration, handling difficulties, and poor landing characteristics. The massive torque required complex rudder and aileron trimming.
- Flight History: The two prototypes completed only a total of 12 flights, none of which lasted longer than 20 minutes, due to recurring engine and mechanical issues.
- Cancellation: The program was abruptly canceled in 1956, largely due to its technical impracticality, the intense noise and vibration issues, and the successful development of conventional jet fighters.
- Legacy: The XF-84H holds the distinction of being the fastest propeller-driven aircraft in history (though not truly supersonic), serving as a unique dead-end in aviation history.
- Preservation: The sole surviving aircraft, one of the two prototypes (serial number 51-17060), is currently displayed at the National Museum of the United States Air Force in Dayton, Ohio.
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