science

NRC tailless glider

NRC tailless glider 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 NRC tailless glider rather than just read about it. In short: The NRC tailless glider, also called the NRL tailless glider, was a two-seat tailless research glider designed by the National Research Council of Canada and built by the National Research Laboratories, at the instigation of G.T.R. Hill who had previously designed the British Westland-Hill Pterodactyl series of tailless aircraft.

Key takeaways

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

Reference excerpt

The NRC tailless glider, also called the NRL tailless glider, was a two-seat tailless research glider designed by the National Research Council of Canada and built by the National Research Laboratories, at the instigation of G.T.R. Hill who had previously designed the British Westland-Hill Pterodactyl series of tailless aircraft.

Development To research the control and stability of tailless aircraft, the National Research Council of Canada initiated a research programme using a specially designed glider, the NRC tailless glider. During the inter-war years Geoffrey T. R. Hill had designed and Westland Aircraft Limited had built a series of tailless aircraft with support from the Royal Aircraft Establishment. During World War II Geoffrey Hill served as the British Scientific Liaison Officer at the National Research Council (NRC) in Canada, where he proposed the development of a tailless research glider similar to his Pterodactyl designs.

Design The glider was constructed predominantly from wood with a single spar built from laminated wood supporting wooden built up ribs covered with a relatively thick plywood skin, which resulted in a smooth surface with minimal distortion. The wing had three distinct sections, comprising a constant-chord, unswept centre section flanked by swept tapered outer sections. Primary flight controls consisted of elevons on the trailing edges of the outer wing sections for pitch and roll, with fins and rudders on the wing-tips for yaw stability and control. Trim in pitch was achieved by adjusting the incidence of movable wing tips using screw jacks. For approach and landing split flaps were fitted to the wing centre section trailing edge. The undercarriage consisted of a retractable tricycle arrangement with auxiliary skids which could be lowered in case the undercarriage failed to extend. Differential brakes were fitted to the main undercarriage wheels. The pilot and flight test engineer were accommodated in two separate cockpits protruding from the top surface of the wing centre section with the pilot in the port cockpit and test engineer in the starboard cockpit. A comprehensive instrumentation package was fitted, with automatic recording of time, airspeed, altitude, wing tip incidence, flap angle, side-slip, roll rate, pitch rate, yaw rate, elevon hinge moment, elevon angles, rudder angles, ambient air temperature, normal acceleration (gy), longitudinal acceleration (gz), gyro attitude, pendulum attitude and bank angle. In addition radio transmissions from the pilot and test engineer were recorded on the ground.

Operational history Flight testing of the aircraft began in 1946 at Namao, Edmonton, flown by S/L. Robert Kronfeld, A.F.C. RAF initially and continued by S/L. E. L. Baudoux, D.S.O., D.F.C., F/L. G. S. Phripp and F/L. G. A. Lee. Mr. T.E.Stephenson was in overall charge of the flying operations as well as scientific observations in the starboard cockpit. Ground handling of the glider was found to be good, using the differential brakes. Launches were carried out as aero-tows behind an RCAF Douglas Dakota with a 350 ft nylon tow-rope, at a normal towing speed of 100 mph, but tows at 140 mph were found to pose no difficulties. Flight testing was carried out predominantly in the glide after a tow to between 6,000 ft and 10,000 ft, testing being terminated at 4,000 ft to allow positioning for entering the landing circuit. Flight characteristics were found to be good with the exception of poor yaw control at low speeds. In September 1948, the glider was towed 2,300 mi (3,701 km) across Canada to Arnprior, Ontario for further testing, completing 105 hours before the project was terminated.

Specifications Data from RCAFGeneral characteristics Crew: 2 Length: 18 ft 0 in (5.48 m) Wingspan: 46 ft 8 in (14.22 m) Gross weight: 4,150 lb (1,882 kg) Performance

Maximum speed: 140 mph (225 km/h, 120 kn) Service ceiling: 10,000 ft (3,048 m)

Worked examples

Example 1 — a first encounter with NRC tailless glider

Start with the simplest possible case. Write down what NRC tailless glider 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 NRC tailless glider 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 NRC tailless glider 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 NRC tailless glider

In research: NRC tailless glider 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 NRC tailless glider 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: NRC tailless glider is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1940s Canadian aircraft, 1940s Canadian sailplanes, Aircraft first flown in 1946, so understanding it makes those chapters shorter.
In everyday life: Look for NRC tailless glider 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 NRC tailless glider in 20 minutes

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

Frequently asked questions

What is NRC tailless glider in simple terms?

Why does NRC tailless glider 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 NRC tailless glider?

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 NRC tailless glider.