science

Sikorsky S-41

Sikorsky S-41 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 Sikorsky S-41 rather than just read about it. In short: The Sikorsky S-41 was an amphibious flying boat airliner produced in the United States in the early 1930s. Essentially a scaled-up monoplane version of the Sikorsky S-38 biplane flying boat, Pan Am operated the type on routes in the Caribbean, South America, and between Boston and Halifax.

Key takeaways

Sikorsky S-41 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Sikorsky S-41 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Sikorsky S-41 from memory before moving on to harder problems.

Reference excerpt

The Sikorsky S-41 was an amphibious flying boat airliner produced in the United States in the early 1930s. Essentially a scaled-up monoplane version of the Sikorsky S-38 biplane flying boat, Pan Am operated the type on routes in the Caribbean, South America, and between Boston and Halifax.

Development The S-41 had a parasol wing configuration, with two radial engines mounted on struts between the fuselage and the wing. The cabin was completely enclosed within the all-metal hull and could seat 15 passengers. The United States Navy purchased three examples and designated them RS-1; these were joined by two Pan Am aircraft pressed into Navy service and designated RS-5.

Variants S-41A S-41B S-41C RS-1 United States Navy designation for three S-41s for evaluation. RS-5 Two S-41s impressed into service with the United States Navy.

Operators United States Pan Am United States Navy

Accidents and incidents On 27 August 1931, A Sikorsky S-41, NC41V of Boston-Maine Airways crash landed while making the run between Halifax (N.S.) and Boston (MA). After clinging to the sides of a partially inflated life raft in rough seas for two hours, the 12 survivors were rescued by the F/V Nova Julia, a mackerel seiner out of Gloucester MA, captained by Capt. Leo Favaloro. There was one fatality. Seventy-year-old Edward Bamwell was assumed trapped in the wreckage as it disappeared beneath the waves just a moment after he gallantly allowed one of the three women passengers to precede him to the waiting raft. The Sikorsky had only been in service one month. Heavy fog was cited as the cause of the crash. The S-41 was repaired and reregistered as NC60V. On 28 October 1931, Col Thomas C. Turner, Chief of the Aviation Section of the United States Marine Corps, flew as a passenger in a Sikorsky RS-1 to Port-au-Prince, Haiti. After arrival, the aircraft became stuck in the sand; when he got out to inspect it, he was struck in the head by one of its propellers. He died from his injuries two days later.

Specifications (S-41A) Data from Jane's all the World's Aircraft 1931, U.S. commercial aircraftGeneral characteristics Crew: 2 Capacity: fifteen Length: 45 ft 2 in (13.77 m) Wingspan: 78 ft 9.25 in (24.0094 m) Wing area: 729 sq ft (67.7 m2) on wheels Airfoil: Sikorsky GSM Empty weight: 8,100 lb (3,674 kg) Gross weight: 13,800 lb (6,260 kg) Fuel capacity: 520 US gal (430 imp gal; 2,000 L) maximum (2,400 lb (1,100 kg) fuel and oil) Powerplant: 2 × Pratt & Whitney R-1860 Hornet B 9-cylinder air-cooled radial piston engines, 575 hp (429 kW) each Propellers: 2-bladed metal propellers Performance

Maximum speed: 131 mph (211 km/h, 114 kn) Cruise speed: 113 mph (182 km/h, 98 kn) Alighting speed: 66 mph (57 kn; 106 km/h) Range: 920 mi (1,480 km, 800 nmi) Service ceiling: 18,210 ft (5,550 m) Rate of climb: 875 ft/min (4.45 m/s) Wing loading: 18.93 lb/sq ft (92.4 kg/m2) Power/mass: 12 lb/hp (7.3 kg/kW)

Illustrations

Worked examples

Example 1 — a first encounter with Sikorsky S-41

Start with the simplest possible case. Write down what Sikorsky S-41 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 Sikorsky S-41 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 Sikorsky S-41 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 Sikorsky S-41

In research: Sikorsky S-41 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 Sikorsky S-41 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: Sikorsky S-41 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1930s United States airliners, Aircraft first flown in 1930, Amphibious aircraft, so understanding it makes those chapters shorter.
In everyday life: Look for Sikorsky S-41 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 Sikorsky S-41 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sikorsky S-41 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 Sikorsky S-41 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sikorsky S-41 in simple terms?

Why does Sikorsky S-41 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 Sikorsky S-41?

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 Sikorsky S-41.