science

Perkins Reluctant Phoenix

Perkins Reluctant Phoenix 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 Perkins Reluctant Phoenix rather than just read about it. In short: The Reluctant Phoenix is a British human-powered aircraft, designed and built in the 1960s by the British engineer Daniel Perkins. It was notable for being an inflatable delta-wing tailless design, and for being flown indoors.

Key takeaways

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

Reference excerpt

The Reluctant Phoenix is a British human-powered aircraft, designed and built in the 1960s by the British engineer Daniel Perkins. It was notable for being an inflatable delta-wing tailless design, and for being flown indoors.

Background Perkins was employed with the Ministry of Defense during the 1950s and 1960s and developed a number of inflatable structures; both for his employers and on his own account. In the late 1950s, he built three human-powered aircraft, all with inflatable wings, though none were successful. The Reluctant Phoenix was Perkins' fourth design. It was a tailless delta-wing monoplane, with a pusher propeller fitted to the tailing edge of the rudder. The primary structure of the craft consisted of single aluminium tube running along the centre-line of the aircraft. To this were attached the undercarriage's steerable nosewheel, pedal cranks, the pilot seat, the control system, a tailwheel, and the tail fin. The remainder of the aircraft's structure consisted of the inflatable wing, which was made from polyurethane-coated nylon fabric. The aerofoil was symmetrical with a 20% chord thickness, with the wing being made up of 8 spanwise webs to form the profile. The pilot sat in a recumbent position, fully ensconced within the wing, with only his head being exposed above an opening in the upper surface of the wing. The drive mechanism consisted of a set of bicycle pedals driving a rope belt drive, over pulleys, through to the propeller drive shaft. A set of handlebars, located underneath the pilot's knees, could be moved in three dimensions. A set of elevons built into the trailing edge of the wing allowed for horizontal and lateral control. The all-flying rudder would be used for directional control. Photographs of the craft show that a pair of vertical wing-tip fins were later added to the craft. It was reported that construction time involved 200 hours, and cost £200. Due to no outdoor runaway being available, flight testing took place within the 812 ft (247 m)-long airship hangar at Cardington, Bedfordshire. Its first flight took place on 18 July 1966. In all 97 flights were made, all with cyclist Mike Street as the pilot. Most of the flights involved towed launches, but at least four were achieved under human-power alone. Take-off runs were in the order of 140 yd (130 m). Flights attained an altitude of 2 ft (0.61 m), with the longest distance covered being 421 ft (128 m). After flight testing was completed, the aircraft was placed in storage. After Perkins' death, the craft was transferred to Fred To, who went on to develop a larger inflatable tailless human-powered aircraft called the Phoenix.

Specifications Data from The history of man-powered flightGeneral characteristics Crew: 1 Wingspan: 8.23 m (27 ft 0 in) Wing area: 23.40 m2 (251.9 sq ft) Aspect ratio: 4 Empty weight: 17.30 kg (38 lb) Propellers: 2-bladed fixed-pitch, 2.58 m (8 ft 6 in) diameter 240 rpm Performance

Cruise speed: 29 km/h (18 mph, 16 kn) Stall speed: 24 km/h (15 mph, 13 kn)

Worked examples

Example 1 — a first encounter with Perkins Reluctant Phoenix

Start with the simplest possible case. Write down what Perkins Reluctant Phoenix 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 Perkins Reluctant Phoenix 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 Perkins Reluctant Phoenix 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 Perkins Reluctant Phoenix

In research: Perkins Reluctant Phoenix 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 Perkins Reluctant Phoenix 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: Perkins Reluctant Phoenix is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1960s British experimental aircraft, Aircraft first flown in 1966, Aircraft with fixed bicycle landing gear, so understanding it makes those chapters shorter.
In everyday life: Look for Perkins Reluctant Phoenix 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Perkins Reluctant Phoenix” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Perkins Reluctant Phoenix in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Perkins Reluctant Phoenix 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 Perkins Reluctant Phoenix out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Perkins Reluctant Phoenix in simple terms?

Why does Perkins Reluctant Phoenix 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 Perkins Reluctant Phoenix?

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 Perkins Reluctant Phoenix.