science

Kocjan Komar

Kocjan Komar 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 Kocjan Komar rather than just read about it. In short: The single-seat Kocjan Komar (Gnat) intermediate trainer, designed in 1932, was the leading and most produced sailplane in pre-war Poland. Production was resumed after World War II as the IS-B Komar and it remained in use until 1965.

Key takeaways

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

Reference excerpt

The single-seat Kocjan Komar (Gnat) intermediate trainer, designed in 1932, was the leading and most produced sailplane in pre-war Poland. Production was resumed after World War II as the IS-B Komar and it remained in use until 1965.

Development Antoni Kocjan designed the Komar in 1932 as an intermediate trainer. Built by Warsztaty Szybowcowe (WS) (Glider Workshops), the prototype first flew in March 1933 and an initial batch of four more followed. Its handling and cross-country performance proved excellent and WS moved to serial production, with sixty more completed before the German invasion in 1939, along with another twenty by SWS at Bielsko and unknown numbers built under WS licences in Bulgaria, Estonia, Finland, Palestine and Yugoslavia. Some early structural failures were traced to a maximum diving speed of only 90 km/h (56 mph; 49 kn), easily exceeded in cloud, so in 1937 Kocjan responded with the strengthened and slightly heavier Komar Bis which also included a cockpit better equipped for night flights. This took over in production. After World War II copies of the engineering drawings of the Komar were sent from Yugoslavia to Poland, where Marian Wasilewski introduced revisions that stiffened the structure, provided an elevator in place of its earlier all-flying tail, improved the ailerons and provided a stronger landing skid. Twenty-three IS-B Komars were built.

Design The Komar was a wooden sailplane. Its high wing had a rectangular plan central section occupying about 40% of the span and double-tapered outer panels with narrow tips. It was built around a single box spar and internal, oblique drag struts near the fuselage. Plywood covering ahead of the spar and around the leading edge formed a torsion resistant D-box. The ply covering extended to the drag struts; the rest of the wing was fabric covered. On each side a strut from the lower fuselage longeron to the spar braced the wing externally. Long ailerons occupied the whole trailing edge of each outer panel. Its fuselage was hexagonal in section, with deep sides. Its single seat cockpit usually had only a windscreen, though at least one Komar flew with a removable cover. Immediately aft of the cockpit the wing was mounted on a raised, streamlined pylon which fell away behind to a slender rear fuselage. A tall, balanced rudder was mounted on a brief, ply fin. The pre-war aircraft had an all-flying tail mounted on top of the fuselage; both the rear control surfaces had, like the wing, ply-covered leading edges but fabric covering elsewhere. The Komar landed on a central, sprung skid and a tailskid.

Operational history Pre-war The Komar could exploit even weak thermals and set a number of duration records. Most of these were national but one was a women's world record: Wanda Modlibowska flew for 24 hr 14 min in May 1937. Another outstanding flight, the first ever long-distance flight by a sailplane over water, took place on 21 September 1937 between Tallinn in Estonia to Helsinki in Finland, with Vunn flying an Estonian-built Komar. Yugoslav-built Komars took part in international contests, including the prestigious 1937 Rhön contest. Post-war On 19–20 October 1949 Stanisław Wielgus, flying "Komar 48" SP-732, established a world record for duration, with a flight lasting 35 hrs 14 min. Komars continued flying with clubs up to 1965.

Variants Kocjan Komar First flown 1933. Kocjan Komar Bis Strengthened, flown 1937. A total 85 examples, including both variants and the prototype, were built in pre-war Poland. IS-B Komar 48 Post-war model with increased stiffness, elevators instead of all-moving tail, revised ailerons and strengthened landing skid. Production from July 1948, first flown 16 January 1949. 5 built. IS-B Komar 49 Production model for 1949 with airbrakes. 18 built, production ended early 1950.

Aircraft on display IS-B Komar (SP-985), Polish Aviation Museum, Kraków

Specifications (Komar bis)

Data from j2mcPlaneurs, Kocjan Kumar bisGeneral characteristics Crew: One Length: 6.87 m (22 ft 6 in) Wingspan: 15.82 m (51 ft 11 in) Height: 1.8 m (5 ft 11 in) Wing area: 17.4 m2 (187 sq ft) Aspect ratio: 14.4 Airfoil: Göttingen Gö 535 at root, with Gö 549 tip. Empty weight: 130 kg (287 lb) Gross weight: 210 kg (463 lb) Performance

Maximum speed: 140 km/h (87 mph, 76 kn) Stall speed: 47 km/h (29 mph, 25 kn) minimum speed Maximum glide ratio: best 20 at 50 km/h (31 mph; 27 kn) Rate of sink: 0.68 m/s (134 ft/min) at 55 km/h (34 mph; 30 kn)

Illustrations

Worked examples

Example 1 — a first encounter with Kocjan Komar

Start with the simplest possible case. Write down what Kocjan Komar 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 Kocjan Komar 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 Kocjan Komar 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 Kocjan Komar

In research: Kocjan Komar 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 Kocjan Komar 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: Kocjan Komar is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1930s Polish sailplanes, Aircraft first flown in 1933, Glider aircraft, so understanding it makes those chapters shorter.
In everyday life: Look for Kocjan Komar 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 Kocjan Komar in 20 minutes

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

Frequently asked questions

What is Kocjan Komar in simple terms?

Why does Kocjan Komar 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 Kocjan Komar?

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 Kocjan Komar.