science

Schreder RS-15

Schreder RS-15 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 Schreder RS-15 rather than just read about it. In short: The RS-15 is a Richard Schreder-designed metal Racing Class sailplane that was offered as a kit for homebuilding during the 1970s and 1980s. Unlike Schreder's other designs, which are all designated HP (for High Performance), the RS-15 takes its nomenclature from the designer's initials and its wingspan in metres.

Key takeaways

Schreder RS-15 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Schreder RS-15 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Schreder RS-15 from memory before moving on to harder problems.

Reference excerpt

The RS-15 is a Richard Schreder-designed metal Racing Class sailplane that was offered as a kit for homebuilding during the 1970s and 1980s. Unlike Schreder's other designs, which are all designated HP (for High Performance), the RS-15 takes its nomenclature from the designer's initials and its wingspan in metres.

Design and development The dominating aesthetic feature of the RS-15 is its pod-and-boom fuselage. The forward fuselage is a composite molding, and the aft portion is a 6" diameter aluminum tube. The V-tail is essentially the same as on other contemporary Schreder sailplanes, differing only in detail design from that of the HP-18. Unlike Schreder's HP-series gliders, the RS-15 was intended to achieve more modest performance, sacrificing performance for a shortened build time. Early RS-15 models featured wings that were essentially the same as the HP-16, and using the same one-piece machined aluminum I-beam wing spar. Later units were supplied with wing kits nearly identical to those of the HP-18, using that ship's riveted aluminum box spar. Unlike the HP-18, however, RS-15 examples usually lack the flap/aileron interconnect that adjusts the neutral aileron deflection to match that of the flap in the range of -10 to +10 flap deflection. Some of these sailplanes with the updated HP-18 wings have -10 to +90 degrees flap deflection. Major features:

Pod-and-boom fuselage with relatively deep cockpit V-tail that folds upwards for easy storage Wing structure composed of spars with caps pre-machined from solid aluminium plate and aluminium wing skins bonded to closely spaced foam ribs Fiberglass fuselage pod, wing tip skids and tail fairings Tubular aluminum aft fuselage Winglets added by some homebuilders Water ballast carried inside the hollow aluminium wing spars Typical Schreder trailing edge flaps/airbrakes

Specifications

General characteristics

Crew: One pilot Length: 22 ft 0 in (6.71 m) Wingspan: 49 ft 2 in (15.00 m) Wing area: 113 sq ft (10.5 m2) Aspect ratio: 21.4 Empty weight: 440 lb (200 kg) Gross weight: 940 lb (426 kg) Performance

Maximum speed: 150 mph (240 km/h, 130 kn) Maximum glide ratio: 38 Rate of sink: 126 ft/min (0.60 m/s)

Worked examples

Example 1 — a first encounter with Schreder RS-15

Start with the simplest possible case. Write down what Schreder RS-15 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 Schreder RS-15 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 Schreder RS-15 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 Schreder RS-15

In research: Schreder RS-15 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 Schreder RS-15 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: Schreder RS-15 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1970s United States sailplanes, Glider aircraft, Schreder aircraft, so understanding it makes those chapters shorter.
In everyday life: Look for Schreder RS-15 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 “Schreder RS-15” →

Affiliate

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

How to study Schreder RS-15 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Schreder RS-15 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 Schreder RS-15 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Schreder RS-15 in simple terms?

Why does Schreder RS-15 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 Schreder RS-15?

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 Schreder RS-15.