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Your Turn

In Uncategorized on December 17, 2009 by hillermuseum

Imagine a cold, gray morning on desolate stretch of sand dunes near the tiny village of Kitty Hawk, North Carolina..106 years ago today, the weather at Kitty Hawk was windy and overcast, with gusts to 27 miles per hour.  Even today, pilots would give careful thought to flight in such conditions.  On December 17th, 1903, no airplane pilot had yet flown.  Wilbur and Orville Wright stood ready to be the first.

As their watches crawled towards 10:35 AM, Wilbur and Orville stood contemplating their 600-plus pound contraption, optimistically named the “Flyer.” They had summoned a curious group of men from the local Life Saving station (predecessors of today’s Coast Guard) to help shuttle their new-fangled contraption onto its short takeoff track.  As they stood warming their hands by a small fire, they may well have heard Wilbur say softly to his brother,  “Still think it’s my turn.”

The brothers had worked as a team for four years and invented the modern science of aerodynamics.  With three different gliders, an improvised wind tunnel, nearly 200 wing models, a modern propeller design and an engine built by their mechanic, Charlie Taylor, the two had laboriously learned more about flight than all the pioneers before them.  Yet their first Flyer could carry but one person, barely, if all went well.

Three days earlier, Wilbur and Orville thought that they were ready for flight.  The Flyer had stood ready on its track, engine running, and a camera was in place.  Although Wilbur was the elder of the brothers, each agreed to toss a coin to select the pilot for the first flight.  Wilbur won, took the controls—and stalled immediately upon liftoff, crashing down and damaging the Flyer’s horizontal stabilizer. 

Now, three days later, after repairing the damage, Orville reckoned that it was his turn to give it a try. Orville won his brother over, and gained a valuable benefit—his brother’s advice.  The original 1903 Flyer’s horizontal stabilizer was close to its center of gravity, and hence was unstable in pitch.  Wilbur had become a skilled pilot flying aerodynamically similar gliders, but on December 14th the new airplane’s instability surprised him and caused the crash.  Wilbur warned his brother of the Flyer’s sensitivity, and with the benefit of this pilot report Orville was ready to make history.

Wilbur and Orville were two bicycle mechanics curious enough, clever enough, and persistent enough to invest the time and effort it took to achieve “sustained, controlled, heavier-than-air powered flight.” There was nothing easy or attractive about it. In their Ohio bicycle shop and on the sands of Kitty Hawk, they wrote their own book on aeronautical design as they went along, carving their own propellers and even building the instruments, gauges and devices needed to test their theories. All the while they taught themselves to fly one the world’s most unstable aircraft lying flat on their stomachs on the lower wing! After each hard landing they went face first into the sage brush, seaweed, and sand. Through it all, the Wrights were persistent. December 17th, 1903 would tell if their years of testing, trial and error, failures and triumph, defeat and discovery would pay off.

As Orville positioned himself face down on the lower wing, hips in the wing-warping saddle and pitch control (elevator) in his left hand, Wilbur approached John Daniels, a member of the Life Saving crew. He politely asked if Mr. Daniels, who had never used a camera before, would squeeze the shutter release as the Flyer reached the end of its track.  Daniels agreed and took his new station.

And with that, the 12-horsepower motor revved, the counter-rotating propellers whirled, the craft moved down the track and… the miracle happened!

The miracle wasn’t the flight; that was the product of four years of scientific research, innovative engineering and hard work on the part of the Wright Brothers. The miracle of Kitty Hawk was that with the howling wind, noise, distraction and excitement of the moment, burly John Daniels kept the calm presence of mind to squeeze the shutter bulb at the right time to take one of the most famous pictures of all time—the Flyer, just clear of its launching track, with Orville aboard and his brother Wilbur alongside.  The Flyer’s shadow is clearly visible, in no place touching the airplane itself.  Flight had become a reality, for 12 breathless seconds and 120 feet.

Wilbur raced to his brother’s side, joined by the men of the Life Saving station.  In short order, the Flyer was returned to its starting point and this time the older brother took his turn for another attempt.  And so it went: Wilbur flew close to 175 feet, and then Orville flew again to a distance of 200 feet. Wilbur made the final flight of the day, staying aloft for 59 seconds and covering 852 feet. That flight ended in a hard landing, damaging the horizontal stabilizer.  Shortly after a gust of wind caught the Flyer and flipped it over, causing more serious damage. After that the brothers called it a day, heading home for Christmas while deciding to construct a new, improved model the following year.

The original Flyer never flew again. The pieces were crated and returned to Dayton where they were stored until 1916, four years after Wilbur’s death.  Orville repaired and reassembled the Flyer for display purposes.  It was exhibited in Boston and London before returning for permanent display at the Smithsonian Institution in Washington, DC.  Today it resides at the National Air and Space Museum, taking its place among the world’s historic aircraft.

Each year thousands of young people visit the Hiller Aviation Museum and tour its collection.  Every visit begins beneath the wings of the Museum’s full size replica of Wilbur and Orville’s original flying machine.  One day, some of these children will take up the torch and contribute to the future growth and progress of aviation. It’s their turn.

By Ray Hall

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Sled Driver

In Uncategorized on November 11, 2009 by hillermuseum

SR-71 Blackbird

On Saturday, November 21st, the Hiller Aviation Museum welcomes SR-71 pilot Brian Shul.  One of only ninety-three pilots who qualified to fly “The Sled”, Brian flew the SR-71 Blackbird for four years.  His book, “Sled Driver:  Flying the World’s Fastest Jet” provides a unique aviator-eye view of this remarkable flying machine.  Join us on Saturday November 21st at 11am as he shares his experiences in person in a special presentation at the Museum.

The Lockheed SR-71 was in many ways the most remarkable western aircraft of the Cold War, able to fly more than three times the speed of sound at altitudes of over 15 miles.  Piloting such an aircraft  at 2,100 miles per hour and 80,000 feet may sound exciting, but it requires remarkable qualifications and dedication.

 The SR-71 provided a means to collect intelligence about the adversaries of the United States.. This was the mission the Lockheed U-2 was originally built for, but the development of surface-to-air missiles made the U-2 vulnerable.  In 1960 a U-2 piloted by Francis Gary Powers was shot down over Russia, and it became obvious that a better aircraft was needed. President Eisenhower approached Lockheed to “…build an airplane that can’t be shot down”. The project was given to legendary aircraft designer Clarence L. “Kelly” Johnson at the “Skunk Works”. Johnson’s experience made him the ideal candidate for the job as he led many programs resulting in such successful aircraft as: P-38, F-80, F-104 and C-130.

 Just eighteen months later, Lockheed rolled out the first aircraft (originally designated A-12) for the CIA. This was followed by the YF-12 and then the SR-71. A total of 50 airplanes were built under several different designations. The project’s code name was Archangel, but Kelly Johnson referred to the aircraft as the “Article”. Later the SR-71 was known as Habu, Lady in Black and the Sled. Most know it only as Blackbird.

 The development of the SR-71 is an amazing story of engineering and construction.  It required the invention of several technologies to achieve its design goals – existing technology and materials would not work. One key to success was the Pratt & Whitney J58 engine. The J58 was a unique design developed expressly for the SR-71.  The engine worked both as a conventional turbojet but also, at high speeds, as a ramjet.  Flight in excess of three times the speed of sound required modification to the engine air inlets. Lockheed engineers created a combination of “spikes”, bleed tubes and bypass doors to control the speed of air entering the engines. The J58 engine also required a special fuel, JP-7. This fuel does not ignite in the conventional manner, so a highly combustible compound called Triethylborane (TEB) was used to light the engines Fuel consumption at such speeds is very high and was carefully managed, often with several air-to-air refuelings during each flight. The J58 was designed to operate with continuous afterburner power, and at maximum speeds 70% of power is provided by the afterburner. Curiously, fuel consumption improves at high speed.

 Friction with the air heated some parts of the SR-71 to 900° F. As a result it was necessary to use a titanium alloy for most of the aircraft’s structure. Titanium is difficult to work with and can’t be forged, thus each SR-71 was essentially hand-built. Ironically, the prime source for titanium imports during the SR-71’s construction was Russia, a nation the Blackbird would spend much of its service career observing.

 Modern aircraft use bladders to hold fuel, but these add weight that reduces performance. In the SR-71, the fuel tanks are integral to the aircraft. Since it was impossible to provide a perfect seal, fuel leaked while the aircraft was on the ground. Once airborne, heat caused the aircraft to expand and close the openings.  Fortunately, since the high-performance JP-7 fuel was difficult to ignite fuel leakage posed no danger to aircraft or aircrews on the ground.

 The SR-71 was one of the first aircraft to include design features meant to reduce its radar signature.  In order to provide a measure of stealth the engineers designed certain parts to reduce radar reflections and used a radar-diffusing paint . The paint used is a dark blue which appears to be black, giving the aircraft the name Blackbird. The afterburning J58 engines produced a huge infrared signature, and a cesium based fuel additive was used to make the SR-71’s exhaust more difficult to detect.

Stealth, however, was secondary to performance in determining the SR-71’s remarkable survivability.  No interceptor aircraft could reach the SR-71, and over 4,000 missiles were fired at it during its service history—with no hits.  Standard evasive procedure for the SR-71 upon detection of a missile launch was to merely accelerate away.

The atmosphere at 80,000 feet is extremely thin, and as a result full pressure flight suits were necessary. The suits developed for the SR-71 were later adapted for use by space shuttle astronauts.  The SR-71’s cockpit was pressurized and air conditioned (the inside of the windshields could exceed 200° F during high speed flight), but if ejection was required the suits were the only thing between life and death.                       

At airspeeds of over 30 miles per minute, accurate navigation is critical to a successful mission. The Air Force modified an Astro-Inertial Navigation System (ANS) first developed for missile guidance for use in the SR-71.  It was unique as it was able to detect a series of stars by day or by night and track them in flight through a small quartz window in the top of the fuselage. The information was fed into a special navigation computer that guided the aircraft.

 Each SR-71 was equipped with a range of electronic and optical sensors to gather and record intelligence required for a particular mission. These included optical and infrared cameras, radar, and electronic detectors. In addition the aircraft was equipped with defensive equipment to protect it from missiles and fighter aircraft, and extensive recording systems to capture data for analysis upon return to base.  The SR-71 was not equipped with systems to download data in flight until nearly the end of its career.

The SR-71 carried a two man crew, a pilot and a Reconnaissance System Officer (RSO). There also was a large support crew at each SR-71 base, and a large contingent of air tankers modified to carry JP-7 fuel were assigned to support the Blackbird. The SR-71 served our nation proudly for 26 years, flying for six different Presidents and being a key component in winning the Cold War. Officially retired in 1990, this magnificent aircraft now resides in 30 different air museums around the country.

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New Aquisition at the Museum

In Uncategorized on November 5, 2009 by hillermuseum

Red Star Rising

The Aero L-39 Comes to the Hiller Aviation Museum

 For over forty years, pilots across Europe warily eyed each other across the heavily fortified borders separating East and West.  In western skies, NATO aviators stood watch against a feared incursion by legions of MiG and Sukhoi jet fighters flown by the air forces of the Warsaw Pact.  In the East, the vast numbers of combat aircraft maintained by the Soviet Union and its allies needed an enormous cadre of highly trained jet fighter pilots.  To provide a suitable training aircraft for this mission the Eastern powers turned to the small Czech village of Vodochody, home of the little-known aircraft manufacturer Aero.

Aero, often referred to as “Aero Vodochody” in reference to its hometown, was founded in 1919.  Initially a state-owned enterprise, Aero designed and built a number of distinctive aircraft from the 1920s into World War II.  During the war, Aero was pressed into service to build large aircraft structures as a subcontractor for German manufacturers, most notably on the unique twin-boomed Focke-Wulf 189 reconnaissance airplane.

 In 1959, Aero’s first jet trainer took flight—the L-29 Delfin (Dolphin).  This small, single-engine jet represented a great leap in capability over the piston-engine trainers in use by the Eastern Europe at the time, and in 1961 it was selected over two competing designs as the Soviet Union’s primary jet trainer.  Over 2,000 were produced through the early 1970s and some remain in front line service even today: two Georgian L-29s were among the aircraft lost in the brief Russia-Georgia war of 2008.

 By the late 1960s the need for a more powerful training platform was evident as the Soviet Union introduced higher-performance jet fighters such as the MiG-25 interceptor.  Aero responded with the L-39 Albatros (Albatross).  Equipped with an Ivchenko AI-25 TL turbofan engine of 3,800 pounds thrust, the L-39 was twice as powerful as its predecessor.  The improved performance permitted a 50% boost in empty weight and substantial growth in the sophistication and durability of its systems.

 Despite its improved engine the L-39 remained a strictly subsonic airplane, unlike the contemporary twin-engine Northrop T-38 produced in the United States during the same period.  However the Albatros was designed to be extremely simple to operate and maintain from bases with limited facilities, and can even be operated from grass airfields.  This led to its production not just for use as a trainer in the Soviet Union and other Warsaw Pact nations, but as a trainer and light attack aircraft in small nations around the world.  Nearly 3,000 L-39s were built between 1972 and 1999 and delivered to air forces in Europe, Africa, Asia and the Caribbean. 

 With the end of the Cold War, the story of the L-39 took an unexpected turn—widespread acceptance as a unique private jet, particularly in the United States.  As the old Soviet Union disbanded, the pilot training requirements for former Warsaw Pact air forces decreased dramatically and many L-39s became available.  Simplicity, ease of maintenance and a purchase price lower than some new single engine piston airplanes made the L-39 extremely attractive to enthusiast pilots seeking a personal jet.  Today, over 2,000 belong to private owners in the United States alone and are flown as Experimental category aircraft.  Their popularity led to the development of the Jet Class competition at the annual Reno Air Races, a category dominated by the now-ubiquitous Albatros.

 Aero continues to offer a remanufactured L-39 with avionics upgrades ranging from simple Global Positioning System navigation units to full glass cockpits complete with heads-up displays.  Aero has also turned westward for support of its newest production model, the L-159 ALCA (Advanced Light Combat Aircraft).  Aero partnered first with Rockwell North American and ultimately with Boeing to develop this single seat light attack aircraft.  The L-159 is based on the L-39 airframe, but includes a radar system and more sophisticated avionics.  The L-159 has not met with the same widespread acceptance as the original L-39, but remains in limited production and serves as a frontline aircraft in the Czech Republic.

 Today, Aero’s involvement with the West continues to grow as it cultivates relationships with several major manufacturers.  It builds door subassemblies for the Boeing 767 and Embraer 170 and 190 commercial aircraft, and both the US Navy’s F-18 fighter and USAF’s new C-27 light transport include components built by Aero.  Since 2001, Aero has also produced fuselages for the popular Sikorsky S-76 helicopter. 

The Hiller Aviation Museum recently welcomed an Aero L-39C into its display collection.   It was built at Vodochody in 1985 and was transferred to private ownership following the end of the Cold War.  In 2005, it raced at the Reno Air Races.  On October 12th, 2009 it completed its final flight with a perfect touchdown at San Carlos Airport and delivery to the Hiller Aviation Museum.  Come and experience this impressive jet aircraft firsthand, out from behind the Iron Curtain and now on display in the Museum’s Gallery.

Sources:

                AERO Vodochody Company History, www.aero.cz/en/history.html, downloaded October 2009

                AERO Vodochody L-39 Product Brochure, 2008

                GlobalSecurity.org, Georgia Air Force, http://www.globalsecurity.org/military/world/georgia , downloaded October 2009

                Jane’s All the World’s Aircraft, 2001-2002

                L-39 Enthusiasts, www.l39.com, downloaded October 2009

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Witch drops Pumpkin from Helicopter

In Uncategorized on October 29, 2009 by hillermuseum

 Join our flying witch for a delightful day of flight and fright as the Hiller Aviation Museum hosts the Halloween Haunted Hangar.  Each day the witch arrives by helicopter and drops a pumpkin to get things off to a smashing start, and then the festivities continue inside!    Explore the Museum’s Gallery if you dare to hunt for hidden haunts.  Build a creepy craft, join the games at our Aerial Carnival, or take off on a moonlight mission in the Flight Sim Zone in a festive celebration of Halloween Flight.  Candy, prizes and spooky surprises make our Helicopter Haunt and extra-special occasion. Come in costume and add to the fun!

 Event included with Museum admission.  No charge 4 under. This event is for younger children and will not be too scary.

Halloween Event and Helicopter Pumpkin Drop

Friday, October 30th, 5 PM—8 PM

Helicopter Arrives at 6:30 PM

 

Saturday, October 31st, 12 PM—3 PM

Helicopter Arrives at 1 PM

For more check out www.hiller.org