R100

Last updated

HM Airship R100
R100.jpg
R100 at its mooring mast in St. Hubert, Quebec, Canada
General information
RolePassenger airship
National originUnited Kingdom
Manufacturer Vickers
Number built1
Registration G-FAAV
History
First flight16 December 1929

His Majesty's Airship R100 was a privately designed and built British rigid airship made as part of a two-ship competition to develop a commercial airship service for use on British Empire routes as part of the Imperial Airship Scheme. The other airship, the R101, was built by the British Air Ministry, but both airships were funded by the Government.

Contents

R100 was built by the Airship Guarantee Company, a specially created subsidiary of the armaments firm Vickers-Armstrongs, led by Commander Dennis Burney. The design team was headed by Barnes Wallis, later famous for his invention of the bouncing bomb. The design team also included Nevil Shute Norway as the senior stress engineer. [Note 1]

R100 first flew in December 1929. It made a series of trial flights and a successful return crossing of the Atlantic in July–August 1930, but following the crash of R101 in October 1930 the Imperial Airship Scheme was terminated and R100 was broken up for scrap.

Background

R100 was built as part of a British government programme to develop airships to provide passenger and mail transport between Britain and the countries of the British Empire, including India, Australia and Canada. This had its origin in Dennistoun Burney's 1922 proposal for a civil airship development programme to be subsidised by the Government and carried out by a specially established subsidiary of Vickers. When the General Election of 1923 brought Ramsay MacDonald’s Labour administration to power, the new Air Minister, Lord Thomson formulated the Imperial Airship Scheme in its place. This called for the building of two experimental airships: one, R101, to be designed and constructed under the direction of the Air Ministry, and the other, R100, to be built by the Vickers subsidiary under a fixed price contract.

Design and development

Composite image representing R100 passing over the Jacques Cartier Bridge in Montreal, August 1930 CP Steamship, R-100 passing the Harbour Bridge, Montreal 1930.jpg
Composite image representing R100 passing over the Jacques Cartier Bridge in Montreal, August 1930

R100 was constructed at the former RNAS Air Station Howden in Yorkshire, a remote location 3 mi (5 km) from Howden and 25 mi (40 km) from Hull. Design work began in 1925 while at the same time the somewhat rundown site was put in order and a hydrogen-generating plant installed.

The specially established subsidiary of Vickers, the Airship Guarantee Company, faced substantial difficulties. The contract for R100's construction was a fixed price one and it was obvious from very early on that the project would incur a loss, and so economies were made; for instance, only a dozen machine tools were in use for construction of the airship. There were also difficulties in finding skilled workers due to the remoteness of the location, and a large proportion of the workers were local people who had to be trained. Conditions in the unheated airship shed were also poor: the roof leaked, ice formed on the girders in winter, and condensation caused corrosion of the airship's duralumin structure, so that the girders had to be varnished. For three years the assembly work was close behind that of the designers, and the progress of the design work was the determining factor in speed of construction.

Airframe

R100 at Cardington, April 1930. The German Graf Zeppelin is seen in the background. R100 moored at Cardington (Our Generation, 1938).jpg
R100 at Cardington, April 1930. The German Graf Zeppelin is seen in the background.

Since wind tunnel tests showed that a 16-side transverse section had about the same drag as a circular one, both R100 and R101 used a smaller number of longitudinal girders than previous airships to simplify stress calculations. Even so, the calculations for the transverse frames required hand computation that took two or three months to produce a solution for each frame. The thoroughness of the stressing calculations was a consequence of new Air Ministry criteria for the strengths required of airships, formulated after the catastrophic structural failure of R38 in 1921. Fewer longitudinal girders resulted in larger unsupported panels of fabric in the envelope, and flight trials were to prove that the R100's covering was barely adequate. The envelope of R101 was also unsatisfactory and a failure in its cover was possibly a cause of its crash.

Barnes Wallis created the frame of the airship using only 11 standard components. The 16 longitudinal girders were formed of three tubes each, formed from strips of Duralumin wound into a helix and riveted together. These connected 15 polygonal transverse frames, which were held in shape by wire bracing connected to a central longitudinal girder running the length of the ship. [1] A further consequence of the new rules for airframe stress design was that a new way of harnessing the lifting force of the gasbags had to be found. Wallis's solution to this problem later led to his innovative geodesic airframe fuselage and wing design for the Wellesley, Wellington, Warwick and Windsor bombers.

The elevators were aerodynamically balanced but the rudders were unbalanced. When the designers learned that R101 had been fitted with servo motors at a substantial cost in weight and money they thought that they had made a mistake and rechecked their calculations. They eventually concluded that their calculations had been correct: when R100 was flown the controls proved both light and effective, and its control characteristics were compared favourably with those of R101 by Nöel Atherstone, First Officer of R101. [2] R100 was built suspended from the roof of its shed. The individual transverse frames were assembled horizontally then lifted up and slung from roof-mounted trackways before being slid into position and attached to the adjacent frames by the longitudinal girders. The ship remained suspended until the gasbags were inflated with hydrogen. [3]

By mid-1929 the ship's structure was nearly complete and its gasbags were inflated. Following inflation of the gasbags, the outer covering of linen fabric painted with aluminium aircraft dope was put in place, and it was completed at the beginning of November. [3] Lift and trim trials were carried out on 11 November: empty weight was 105.52 long tons (107.21 t) and gasbag volume was 5,156,000 cu ft (146,000 m3), giving a standard gross lift of 156.52 long tons (159.03 t) and so a disposable lift of 51.00 long tons (51.82 t). Deducting 18 long tons (18 t) for the service load (crew, stores and ballast) this meant the weight available for fuel and payload was 33.00 long tons (33.53 t). [4]

Propulsion

It had originally been intended to design special engines for R100 which would be fuelled by hydrogen and kerosene but after a year's work it was realised that the engine would not be developed in time and it was decided to fit the Beardmore Tornado diesel engine that was being developed for the Air Ministry for installation in R101. At an early stage the Tornado was judged unsuitable because of its weight and other problems, and Wallis settled on the use of six reconditioned Rolls-Royce Condor petrol engines even though the fuel, with its lower flash point, was considered to be a fire risk under tropical conditions. [5] The engines were contained in three gondolas, each with one engine driving a 17 ft (5.18 m) diameter tractor propeller, a second driving a 15 ft (4.57 m) diameter pusher propeller, and a third smaller engine in the middle of the car driving a dynamo for electrical power. The engines driving the pusher propellers were fitted with a gearbox to provide reverse thrust for docking the airship. [6]

Passenger and crew accommodation

The passenger and crew accommodation were arranged on three decks occupying a single bay of the structure and entirely contained within the airship's envelope. The lower deck contained the crew accommodation. The second deck had a dining room, which doubled as the passenger lounge, plus the kitchen, 18 four-berth passenger cabins and a gallery on either side for passengers to enjoy the view through the windows built into the skin. The third deck consisted of a gallery running around the dining room and 14 two-berth cabins. [6]

Operational history

First flights

R100 made its maiden flight in the morning of 16 December 1929. After departing Howden at 07:53, it flew slowly to York then set course for the Royal Airship Works at Cardington, Bedfordshire, running on five engines since one of the engines had to be shut down because of a cracked water jacket, and completing the mooring process at 13:40. [7] A second flight was made the next day, with the intention of making a flight to London, but shortly after slipping the mast, a strip of fabric became detached from the lower fin, and the flight was limited to a cruise around Bedfordshire to test control response, lasting 6 hr 29 min. The following day, R100 was taken from the mast to No.2 shed at Cardington and work on modifying the wiring holding the cover in place begun: this took until 11 January 1930. [8]

During a test on 16 January 1930, R100 achieved a speed of 81.5 mph (131.2 km/h). [9] At speed, a problem with the outer covering became apparent: it tended to ripple and flap excessively in the form of a standing wave. During a fourth flight on 20 January, cine film was taken of this phenomenon, which occurred because of the large areas of unsupported fabric; it is also visible in some photographs.

A further short flight was made on 20 January before an endurance flight, starting at 09:38 on 27 January when R100 slipped the mast at Cardington and ending at 15:26 on 29 January after more than 53 hours in the air. [10] Following this flight, it was returned to the shed for work on the cover to be carried out. At the same time, the original reconditioned Condor IIIA engines were replaced by six new Condor IIIBs and some weight was eliminated by reducing the amount of passenger accommodation. The work was complete by the end of April, but on 24 April it was caught by a gust while being walked out of the shed, damaging the tail surfaces. The wind prevented it being replaced in the shed, so it was moored to the mast. [11] It was not possible to return it to the shed for repairs until the morning of 27 April. Repairs took longer than expected, and R100 remained in the shed until 21 May, when it made a 24-hour flight intended to test the new engine installation and modifications to the cover.

R100's contract had originally called for a demonstration flight to India. The decision to use petrol engines resulted in a change in destination to Canada, as it was considered that a flight to the tropics with petrol aboard would be too hazardous. All being well, it was planned to set off for Canada on 25 May. During the flight of 21 May, the conical tail section collapsed due to unexpected aerodynamic pressure, and it was returned to the shed where the original tail section was replaced by a hemispherical cap designed and made by the Royal Airship Works, [12] reducing the airship's length by 15 ft (4.6 m)

Transatlantic voyage to Canada

R100 over Canadian Bank of Commerce building in Toronto, Ontario, then the highest building in the British Empire (August 1930). The rippling of the airship's cover is visible. Airship Toronto.jpg
R100 over Canadian Bank of Commerce building in Toronto, Ontario, then the highest building in the British Empire (August 1930). The rippling of the airship's cover is visible.
R-100 Approaching mast, St. Hubert, Quebec after flight from Toronto. Aug. 1930 R-100 Approaching mast, St. Hubert, Quebec after flight from Toronto. Aug. 1930.jpg
R-100 Approaching mast, St. Hubert, Quebec after flight from Toronto. Aug. 1930

Shortly before R101's flights in June 1930, the Cardington engineers tentatively suggested that the long flights to Canada and India might be postponed until 1931 on the grounds that neither of the two airships was fit to make a lengthy flight at their current developmental stage. [13] The R100 team replied that their airship was perfectly capable of flying to Canada, and that the Canadian flight was a part of their contract. [14] R100 departed for Canada on 29 July 1930, reaching its mooring mast at the St-Hubert, Quebec Airport (outside Montreal) in 78 hours, having covered the great circle route of 3,300 mi (5,300 km) at an average ground speed of 42 mph (68 km/h). The airship stayed at Montreal for 12 days with over 100,000 people visiting the airship each day while it was moored there, and a song was composed by La Bolduc to make fun of the people's fascination with R100. [14]

It also made a 24-hour passenger-carrying flight to Ottawa, Toronto, and Niagara Falls while in Canada. The airship departed on its return flight on 13 August, reaching Cardington after a 57½ hour flight. Nevil Shute Norway later suggested in Slide Rule: Autobiography of an Engineer that the success of R100's Canadian flight indirectly led to the R101 disaster. Prior to the transatlantic flight, the Cardington team could suggest that neither airship was ready for a performance of such duration. However, when R100 returned in triumph they had to either make the flight to India or admit defeat – which would have meant discredit with the consequent danger of losing their jobs. He said that his team "guessed that their ship was a bad airship, but did not realise" (because of secrecy at Cardington) "how bad the other ship was." [14]

The end of the British airships

The tale of the design of R100 and its claimed superiority to R101 is told in Shute Norway's Slide Rule: Autobiography of an Engineer, first published in 1954. Although flawed and not quite as overwhelmingly superior as Shute Norway implied, R100 represented the best that conventional airship technology in Britain had to offer at the time.[ citation needed ] R101 suffered in comparison partly because of its many groundbreaking but ultimately dubious innovations, and also because of the weight of its diesel engines. In lifting efficiency, both dirigibles were inferior to the smaller LZ 127 Graf Zeppelin. After R101 crashed and burned in France, en route to India on 5 October 1930, the Air Ministry ordered R100 grounded. The airship was deflated and hung up in its shed at Cardington for a year whilst three options were considered: a complete refit of R100 and continuation of tests for the eventual construction of R102; static testing of R100 and retention of about 300 staff to keep the programme "ticking over"; or retention of staff and the scrapping of the airship. In December 1931, the R100 was broken up and sold for scrap. The framework of the ship was dismantled, flattened by a steamroller and cut up into sections, [15] and sold for less than £600.

Specifications (as first flight)

R100 at Cardington mooring mast R-100 attached to mooring mast in Bedforshire, 1930.jpg
R100 at Cardington mooring mast

Data from Masefield [16]

General characteristics

Performance

See also

Aircraft of comparable role, configuration, and era

Related lists

Related Research Articles

<span class="mw-page-title-main">Nevil Shute</span> English aeronautical engineer and writer (1899–1960)

Nevil Shute Norway was an English novelist and aeronautical engineer who spent his later years in Australia. He used his full name in his engineering career and Nevil Shute as his pen name, in order to protect his engineering career from inferences by his employers (Vickers) or from fellow engineers that he was "not a serious person" or from potentially adverse publicity in connection with his novels, which included On the Beach and A Town Like Alice.

<span class="mw-page-title-main">R101</span> British rigid airship

R101 was one of a pair of British rigid airships completed in 1929 as part of the Imperial Airship Scheme, a British government programme to develop civil airships capable of service on long-distance routes within the British Empire. It was designed and built by an Air Ministry–appointed team and was effectively in competition with the government-funded but privately designed and built R100. When built, it was the world's largest flying craft at 731 ft (223 m) in length, and it was not surpassed by another hydrogen-filled rigid airship until the LZ 129 Hindenburg was launched seven years later.

<i>R38</i>-class airship British rigid airship class

The R.38 class of rigid airships was designed for Britain's Royal Navy during the final months of the First World War, intended for long-range patrol duties over the North Sea. Four similar airships were originally ordered by the Admiralty, but orders for three of these were cancelled after the armistice with Germany and R.38, the lead ship of the class, was sold to the United States Navy in October 1919 before completion.

<i>Slide Rule: Autobiography of an Engineer</i>

Slide Rule: Autobiography of an Engineer is the partial autobiography of the British novelist Nevil Shute. It was first published in 1954. Slide Rule concentrates on Nevil Shute's work in aviation, ending in 1938 when he left the industry.

<span class="mw-page-title-main">Dennistoun Burney</span> English engineer and politician

Sir Charles Dennistoun Burney, 2nd Baronet was an English aeronautical engineer, private inventor and Conservative Party politician.

<span class="mw-page-title-main">R80 (airship)</span> Type of aircraft

The R.80 was a British rigid airship, first flown on 19 July 1920, and was the first fully streamlined airship to be built in Britain. Originally a military project for the British Admiralty, it was completed for commercial passenger-carrying. R.80 proved too small for this role and after being used briefly to train the United States Navy personnel who were to crew the ZR-2 airship, R.80 was retired and eventually scrapped in 1925.

<span class="mw-page-title-main">Rigid airship</span> Airship in which the envelope is supported by a framework

A rigid airship is a type of airship in which the envelope is supported by an internal framework rather than by being kept in shape by the pressure of the lifting gas within the envelope, as in blimps and semi-rigid airships. Rigid airships are often commonly called Zeppelins, though this technically refers only to airships built by the Luftschiffbau Zeppelin company.

<span class="mw-page-title-main">23-class airship</span> Type of aircraft

The 23 class were rigid airships produced in the United Kingdom during the First World War. Development of the 23 class began in August 1915 when Vickers was asked to improve the 9r design by increasing its gas capacity by adding a bay and increasing the capacity of the bow and stern gas cells. The 23-class was designed by H.B. Pratt and Barnes Wallis of Vickers. Vickers built the first and last of the four ships. The other two were built by William Beardmore and Company and Armstrong-Whitworth. While the 23 class airships were never used in combat, the four ships provided many hours of valuable training and experimental data for British airship crews and designers. Although a total of 17 of these ships were contemplated at one time, only four were ever built. The 23 class was found to be significantly overweight, leading to its cancellation in favour of the more-refined R23X class.

<span class="mw-page-title-main">No. 9r</span> Type of aircraft

HMA No. 9r was a rigid airship designed and built by Vickers at Walney Island just off Barrow-in-Furness, Cumbria. It was ordered in 1913 but did not fly until 27 November 1916 when it became the first British rigid airship to do so. It was dismantled in June 1918 after being flown for around 165 hours, mainly for experimental purposes.

Vickers Limited was a British engineering conglomerate. The business began in Sheffield in 1828 as a steel foundry and became known for its church bells, going on to make shafts and propellers for ships, armour plate and then artillery. Entire large ships, cars, tanks and torpedoes followed. Airships and aircraft were added, and Vickers jet airliners were to remain in production until 1965.

<span class="mw-page-title-main">Imperial Airship Scheme</span>

The British Imperial Airship Scheme was a 1920s project to improve communication between Britain and the distant countries of the British Empire by establishing air routes using airships. The first phase was the construction of two large and technically advanced airships, the R100 and the R101; the R100 made a successful transatlantic crossing to Canada in 1930 in 78 hours. The scheme was terminated in 1931 following the crash in France of R101 in October 1930, while attempting its first flight to India.

The R.102 was a British airship planned in 1930 but never built. The development of R.102 resulted from the Imperial Airship Scheme, when it became apparent that the R100 and R101 airships then being built would not be capable of economic operation over the planned routes. After the crash of the R.101 in October 1930, the project was reevaluated and further airship development abandoned.

<span class="mw-page-title-main">HMA No. 1</span> Rigid airship of the Royal Navy (completed 1911)

His Majesty's Airship No. 1 was designed and built by Vickers, Sons and Maxim at their works in Barrow-in-Furness, Lancashire, England, as an aerial scout airship for the Royal Navy. It was the first British rigid airship to be built, and was constructed in a direct attempt to compete with the German airship programme. Often referred to as "Mayfly", a nickname given to it by the lower deck, in public records it is designated 'HMA Hermione' because the naval contingent at Barrow were attached to HMS Hermione, a cruiser moored locally preparing to act as its tender.

<span class="mw-page-title-main">RNAS Howden</span> Military base in Yorkshire, England

RNAS Howden was an airship station near the town of Howden 15 miles (24 km) south-east of York, England.

<span class="mw-page-title-main">Beardmore Tornado</span> 1920s British diesel aircraft engine

The Beardmore Tornado is an eight-cylinder inline diesel aircraft engine built in 1927 by William Beardmore and Company of Glasgow, Scotland, and used in the British R101 airship when petrol engines were thought unsafe in the tropics. The model is given as Tornado IIIA or Tornado III C.I. The fuel is described as Diesel heavy-oil.

A mooring mast, or mooring tower, is a structure designed to allow for the docking of an airship outside of an airship hangar or similar structure. More specifically, a mooring mast is a mast or tower that contains a fitting on its top that allows for the bow of the airship to attach its mooring line to the structure. When it is not necessary or convenient to put an airship into its hangar between flights, airships can be moored on the surface of land or water, in the air to one or more wires, or to a mooring mast. After their development mooring masts became the standard approach to mooring airships as considerable manhandling was avoided.

Lieutenant-Colonel Vincent Crane Richmond OBE FRAeS. (1893–1930) was an English engineer and airship designer. He served first with the Royal Naval Air Service then the Royal Air Force. He was notable as designer of the Royal Airship Works R101 airship in which he died on 5 October 1930 when it crashed over France on its maiden voyage.

Flight Lieutenant Herbert Carmichael "Bird" Irwin, AFC was an Irish aviator and Olympic athlete.

<span class="mw-page-title-main">George Herbert Scott</span> British airship pilot and engineer

Major George Herbert "Lucky Breeze" Scott, CBE, AFC, was a British airship pilot and engineer. After serving in the Royal Naval Air Service and Royal Air Force during World War I, Scott went on to command the airship R34 on its return Atlantic crossing in 1919, which marked the first transatlantic flight by an airship and the first east–west transatlantic flight by an aircraft of any kind. Subsequently, he worked at the Royal Airship Works in connection with the Imperial Airship Scheme and took part in a second return Atlantic crossing, this time by the R100, in 1930. He was killed later in the year aboard the R100's near-sister, the R101, when it crashed in northern France during a flight to India.

<span class="mw-page-title-main">Zeppelin R Class</span> Type of aircraft

The Zeppelin R Class was a type of rigid airship developed by Zeppelin Luftschiffbau in 1916 for use by the Imperial German Navy and the German Army for bombing and naval patrol work. Introduced in July 1916 at a time when British air defences were becoming increasingly capable, several were lost in the first months of operation, leading the Germans to reconsider their technical requirements and eventually to develop airships capable of bombing from a greater height. Most surviving examples were modified to meet these requirements, by reducing weight at the expense of performance. A total of 17 were built.

References

Notes

  1. Norway later became famous as a novelist, writing under the name of Nevil Shute; he was critical of the designers of the R38 and R101 in his autobiography Slide Rule: Autobiography of an Engineer

Citations

  1. Masefield 1982, p. 165.
  2. Masefield 1982, p. 189.
  3. 1 2 Ventry and Kolesnik 1977, p. 137.
  4. Masefield 1982, pp. 168–169.
  5. Hartcup 1974, p. 189.
  6. 1 2 Masefield 1982, p. 166.
  7. Masefield 1982, pp. 171–172.
  8. Masefield 1982, pp. 172–173.
  9. "Third Flight Of R100." The Times, Issue 45413, 17 January 1930, p. 14, Column E.
  10. "Return Of R100." The Times, Issue 45424, 30 January 1930, p. 11, Column E.
  11. Masefield 1982, pp. 198–199.
  12. Masefield 1982, pp. 203–204.
  13. Masefield 1982, p. 206.
  14. 1 2 3 Shute 1954, p. 106.
  15. "R100 Meets End." Popular Aviation, October 1932, p. 225.
  16. Masefield 1983, pp. 168–169.
  17. Masefield 1982, p. 495.

Bibliography

  • Anderson, John. Airship on a Shoestring: The Story of R-100. Bedfordshire, UK: Bright Pen, 2014. ISBN   978-0-7552-0735-0.
  • Gilbert, James. The World's Worst Aircraft. Walton-on-Thames, UK: Michael Joseph, Third Edition 1975. ISBN   978-0-7181-1269-1.
  • Griehl, Manfred and Joachim Dressel. Zeppelin! The German Airship Story London: Arms & Armour, 1991. ISBN   1-85409-045-3.
  • Hartcup, Guy. The Achievement of the Airship: A History of the Development of Rigid, Semi-rigid, and Non-rigid Airships. London: David & Charles, 1974. ISBN   978-0-85885-193-1.
  • Higham, Robin. The British Rigid Airship, 1908-1931 London: Foulis, 1961.
  • Masefield, P. To Ride The Storm. London: William Kimber, 1982. ISBN   0-7183-0068-8.
  • Morpurgo, J.E. Barnes Wallis: A Biography. London: Longman, 1972. ISBN   0-582-10360-6.
  • Mowthorpe, Ces. Battlebags: British Airships of the First World War: An Illustrated History. London: Alan Sutton Publishing, Ltd., 1995. ISBN   0-905778-13-8.
  • Pratt, Michel. Airships R-100 and R-101: The Success of the R-100's trip to Canada and the Tragedy of the R-101 in France . Éditions Histoire Québec.
  • Shute, Nevil (1954). Slide Rule: Autobiography of an Engineer. London: William Heinemann. ISBN   1-84232-291-5.
  • Ventry, Lord and Eugene Kolesnik. Airship Development (Jane's Pocket Book 7). Durham, UK: Macdonald Press, 1976. ISBN   0-356-04656-7.
  • Ventry, Lord and Eugene Kolesnik. Airship Saga: The History of Airships Seen Through the Eyes of the Men who Designed, Built, and Flew Them. Poole, Dorset, UK: Blandford Press, 1982. ISBN   0-7137-1001-2.
  • Ward, Ian and Brian Innes, eds. The World of Automobiles: An Illustrated Encyclopedia of the Motor Car. London: Orbis, 1974.