science

Granger Archaeopteryx

Granger Archaeopteryx is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Granger Archaeopteryx rather than just read about it. In short: The Granger Archaeopteryx is a British single-engined, tailless parasol monoplane designed and built in the late 1920s by two brothers, R.F.T. and R.J.T. Granger.

Key takeaways

Granger Archaeopteryx belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Granger Archaeopteryx to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Granger Archaeopteryx from memory before moving on to harder problems.

Reference excerpt

The Granger Archaeopteryx is a British single-engined, tailless parasol monoplane designed and built in the late 1920s by two brothers, R.F.T. and R.J.T. Granger. The sole example built is currently under restoration for flight.

Design The layout of the Archaeopteryx was inspired by the tailless swept-winged Westland-Hill Pterodactyl, itself derived from the aircraft of J. W. Dunne. These aircraft had been designed to resist stalling and to allow easy and safe recovery if they did. The Archaeopteryx follows the Dunne D.7 in being a parasol wing monoplane, however it differs in being the first aircraft of tailless swept configuration to have a nose-mounted tractor propeller. Lateral and pitch control is via all-moving wing tips which act as elevons, as developed by Hill for the Pterodactyl. It also has a conventional vertical tail fin and rudder. It is powered by a 32 horsepower (24 kW) Bristol Cherub engine.

History After seeing the success of the Westland-Hill Pterodactyl, the Granger brothers decided to build their own aircraft in which to learn to fly. They were also influenced by the designs of J. W. Dunne, and designed their machine with the assistance of C.H. Latimer-Needham. Named after the Archaeopteryx prehistoric bird, the aircraft first flew at Hucknall near Nottingham in October 1930. It was not initially registered with the CAA and flew without markings until two years later when it was given the registration of G-ABXL on 3 June 1932. The brothers both piloted the aircraft many times in the Nottingham area, and flew it as far as Hatfield in June 1935 to attend a flying display. Performance on the Bristol Cherub engine was marginal; as originally built the Archaeopteryx was an Ultralight and as such the performance was adequate, so long as the pilot weighed no more than 11 stone (150 lb; 70 kg). It was flown quite successfully for five years prior to its retirement. The aircraft proved difficult to control in pitch, especially on landing where a series of large bounces often developed. It was flown regularly between 1930 and 1936 before being stored for 30 years at the home of one of the Granger Brothers in Chilwell, Nottingham. In the 1960s the designers realised the type's significance as a forerunner of modern swept wing aircraft, and on 28 April 1967, G-ABXL was presented to the Shuttleworth Collection by R.J.T. Granger where it was restored to an airworthy condition and flew again in June 1971 in the hands of Sqn.Ldr. J. Lewis. During the restoration a new throttle control was moved to a position outside of the fuselage and, with a pilot whose weight is at the limit, a positive climb rate can only be obtained by the pilot moving his arms and elbows into the cramped cockpit to minimise drag. Ownership subsequently passed back to the Granger family in May 2002. The aircraft is once again being restored to flying condition.

Specifications (Archaeopteryx) Data from Jackson and Guttery.General characteristics Crew: One Length: 14 ft 10 in (4.6 m) Wingspan: 27 ft 6 in (8.2 m) Wing area: 102 sq ft (9.5 m2) Airfoil: RAF 340 series Empty weight: 400 lb (181.4 kg) Gross weight: 612 lb (277.6 kg) Powerplant: × Bristol Cherub I , 32 hp (24 kW) Performance

Maximum speed: 95 mph (153 km/h, 83 kn) Cruise speed: 75 mph (121 km/h, 65 kn) Stall speed: 37 mph (60 km/h, 32 kn)

Illustrations

Worked examples

Example 1 — a first encounter with Granger Archaeopteryx

Start with the simplest possible case. Write down what Granger Archaeopteryx claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Granger Archaeopteryx before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Granger Archaeopteryx ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Granger Archaeopteryx

In research: Granger Archaeopteryx appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Granger Archaeopteryx in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Granger Archaeopteryx is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1930s British sport aircraft, Aircraft first flown in 1930, Parasol-wing aircraft, so understanding it makes those chapters shorter.
In everyday life: Look for Granger Archaeopteryx outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Granger Archaeopteryx in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Granger Archaeopteryx means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Granger Archaeopteryx out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Granger Archaeopteryx in simple terms?

The Granger Archaeopteryx is a British single-engined, tailless parasol monoplane designed and built in the late 1920s by two brothers, R.F.T. and R.J.T. Granger.

Why does Granger Archaeopteryx matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Granger Archaeopteryx?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Granger Archaeopteryx.