Republic XF-84H Thunderscreech (Air Force Legends), by Steve Ginter
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Republic XF-84H Thunderscreech (Air Force Legends), by Steve Ginter
PDF Ebook Download Online: Republic XF-84H Thunderscreech (Air Force Legends), by Steve Ginter
The XF-84H was derived from the RF-84F as a supersonic propeller test vehicle driven by an afterburning Allison XT-40 turboprop engine. Two aircraft were built and briefly tested as noise produced by the propeller even at idle was too severe for safe ground crew activities. The sickening noise gave the aircraft its nickname "Thunderscreech."
It was the first US aircraft built with a Ram Air Turbine (RAT) which provided emergency electrical and hydraulic power in subsequent US aircraft, but provided needed power for the XF-84H when landing. Another novel feature was a "take-off fin" or "vortex gate" aft of the cockpit to overcome the effects of the propeller torque.
The flight program lasted from June 1955 until October 1956 with the program being taken over by the McDonnell XF-88B which flew until January 1958. The XF-88B had both turbojet and turboprop engines and could taxi and take off without the turboprop operating, thus without subjecting the ground crew to the painful noise.
Republic XF-84H Thunderscreech (Air Force Legends), by Steve Ginter- Amazon Sales Rank: #551713 in Books
- Model: GI219
- Published on: 2015-10-15
- Original language: English
- Number of items: 1
- Dimensions: 11.00" h x .13" w x 8.50" l, .0 pounds
- Binding: Paperback
- 40 pages
- Detailed diagrams
- Photographs
- Detailed facts
Review "For those interested in interesting US Air Force testbed aircraft, this is a great book to have. Not only does it fill a gap in the story on the F-84, it also helps tell the story of the evolution of aircraft propulsion in the 1950s." (Chris Banyai-Riepl Internet Modeler 2015-10-25)"Utterly enjoyable, informative." (David L. Veres Cybermodeler Online 2015-11-20)
From the Back Cover The XF-84H was derived from the RF-84F as a supersonic propeller test vehicle driven by an afterburning Allison XT-40 turboprop engine. Two aircraft were built and briefly tested as noise produced by the propeller even at idle was too severe for safe ground crew activities. The sickening noise gave the aircraft its nickname "Thunderscreech."
It was the first US aircraft built with a Ram Air Turbine (RAT) which provided emergency electrical and hydraulic power in subsequent US aircraft, but provided needed power for the XF-84H when landing. Another novel feature was a "take-off fin" or "vortex gate" aft of the cockpit to overcome the effects of the propeller torque.
The flight program lasted from June 1955 until October 1956 with the program being taken over by the McDonnell XF-88B which flew until January 1958. The XF-88B had both turbojet and turboprop engines and could taxi and take off without the turboprop operating, thus without subjecting the ground crew to the painful noise.
About the Author Upon graduation from college, Steve Ginter was commissioned an officer in the U.S. Navy and became a pilot. After leaving the Navy he entered into corporate human resources at the management level. Steve Ginter founded Ginter Books, Naval Fighters Series in 1980 while working in district and regional management positions for Thrifty Drugs. In the 1990s the Air Force Legends Series was launched. Between the two series, over 112 books have been published thus far promoting the colorful history of military aircraft in America.
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Most helpful customer reviews
1 of 1 people found the following review helpful. XF-84H Book Comments By John M. Leonard This book contains a lot of good pictures of the XF-84H and a nice table of geometric characteristics. But I thought it had too many pictures of landing gears and ejection seats. I thought it contained a number of technical errors. For example, the Navy T40s used a combining gearbox where both propellers could be turned by either engine, not separately with each prop being powered by its own engine. The anti-torque fin called a "take-off fin" would have been worthless at take-off because the aircraft speed would have been to low. And I question all of the references to an afterburner. I have looked up the tailpipe of the XF-84H at the Air Force Museum and I don't see anything that looks like an afterburner - no fuel nozzles and no flame holder. And he didn't say anything about the 3000 rpm prop designed and built for the Navy. (See the AAHS Journal. Fall 2015.)
0 of 0 people found the following review helpful. Not exactly legendary... By Jim Davis The 19th book in publisher (and in this instance, author) Steve Ginter's Air Force Legends series is a typical example. It's an 8-1/2" x 11", 40 page, stapled card cover with color restricted to the front and rear covers. In this particular instance the lack of color does not detract from the book as the aircraft never had much in the way of a colorful paint scheme.Ginter's text is brief but fairly comprehensive. There is a full background to turboprop aircraft in both services and a discussion of why such aircraft were of interest in this period. He makes it clear that the XF-84H was intended as a propeller testbed and not as an operational aircraft. The technical details of the aircraft are presented in some depth. The brief flight testing is covered in adequate detail. The aircraft's ultimate failure as a propeller testbed, and the much greater success of the "interim" XF-88B in that role, and the final disposition of the two airframes concludes the story.The last four pages are devoted to plastic kits of the aircraft. Surprisingly, there have been four but none have been injection molded.The book is well supported by many black and white photographs and contemporary technical literature drawings which are a strength of the Ginter format. Less effective were the later drawings by Lloyd S. Jones but the ones by Mike Herrill were better.Criticisms are few. The use of an afterburner on a turboprop is odd and called for more explantion. There are no detailed tailpipe shots so there is no clue what type of nozzle would have been provided. Also strange is the use of the term "cathedral" instead of the usual "anhedral". This is also the first time I've come across degrees of power lever angle instead of percent throttle. And last, and certainly least, the actress posing with the aircraft went by Joi Lansing, not Joy Lansing.This type of aircraft, unsuccessful but unusual and interesting, is exactly the kind this series excels at covering. The book can be highly recommended as probably the best reference we're likely to get for this aircraft for some time to come.
0 of 0 people found the following review helpful. A good informative read and reference By Jack Bright Was interested in more of the background of the USN's involvement in program but found it lacking in more detai. Otherwise consistent with information in other releases in this series. A good informative read and reference.
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