science

Lange Antares

Lange Antares 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 Lange Antares rather than just read about it. In short: The Lange Antares is a glider built by Lange Aviation produced with three different wingspans, 18, 20 and 23 meters. The 20 and 23 meter variants can be equipped with a 42-kW electric motor and SAFT VL 41M lithium-ion batteries.

Key takeaways

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

Reference excerpt

The Lange Antares is a glider built by Lange Aviation produced with three different wingspans, 18, 20 and 23 meters. The 20 and 23 meter variants can be equipped with a 42-kW electric motor and SAFT VL 41M lithium-ion batteries. The EM 42 is a fixed-shaft brushless DC electric motor running at 190-288 V, and drawing up to 160 A, the 42 kW motor can deliver up to 216 N.m of torque over a speed range of 160-1600 RPM with a total efficiency of 90%. Maximum continuous power is 38.5 kW, the motor weighs 29 kg, and the weight of power electronics is 10 kg. The motor turns a two-blade fixed-pitch propeller, LF-P42, constructed of composite materials, having a diameter of two meters. The battery system consists of two battery packs positioned in the leading edges of both inner wings (72 cells divided into 24 modules containing 3 cells each). The battery life is expected to be 3000 cycles or 20 years. The capacity of the battery is 41 Ah (specific energy 136 Wh/kg and specific peak power 794 W/kg). The batteries can deliver 13 minutes at maximum power and maximum climb speed, and can climb 3,000 meters on one battery charge; in reality, in warm climates, motor and electronics temperature limitations can limit the achievable climb height. The charger is integrated inside the fuselage so when landing elsewhere the pilot merely has to find a (16A) electric outlet socket. The glider has a modem connected to its main computer so that Lange technicians can, in theory, run diagnostics remotely. The same modem allows the pilot remote control & monitoring of the battery charging process. The undercarriage and engine doors are electro-hydraulically operated. The tailwheel is steerable. The wing has an elliptical planform, with winglets and wing-tip wheels. The glide polar shows excellent high speed performance.

Variants Antares 18S - 18 meter wingspan pure glider. Antares 18T - 18 meter wingspan glider with Solo 2350 two-stroke gasoline sustainer engine. Antares 20E - 20 meter wingspan with 42 kW electric self-launch capable engine. Antares 23E - 23 meter wingspan with 42 kW electric self-launch capable engine.

Specifications

Antares 20E General characteristics

Crew: one pilot Capacity: 100 L water ballast Length: 7.40 m (24 ft 3 in) Wingspan: 20.00 m (65 ft 7 in) Height: 1.64 m (5 ft 5 in) Wing area: 12.6 m2 (135.6 sq ft) Aspect ratio: 31.7 Empty weight: 460 kg (1,014 lb) Gross weight: 660 kg (1,455 lb) Powerplant: 1 × Lange EM 42 , 42 kW (57 hp) Performance

Maximum speed: 280 km/h (174 mph, 151 kn) Maximum glide ratio: 56 Rate of climb: 4.4 m/s (866 ft/min) Rate of sink: 0.49 m/s (96 ft/min)

Antares 23E General characteristics

Crew: one pilot Capacity: 250 L water ballast Length: 7.48 m (24 ft 6.5 in) Wingspan: 23.00 m (75 ft 5.5 in) Height: 1.89 m (6 ft 2 in) Wing area: 14.75 m2 (158.76 sq ft) Aspect ratio: 38.26 Empty weight: 510 kg (1,124 lb) Gross weight: 850 kg (1,873 lb) Powerplant: 1 × Lange EM 42 , 42 kW (57 hp) Performance

Maximum speed: 280 km/h (174 mph, 151 kn) Maximum glide ratio: 60 Rate of climb: 4.0 m/s (787 ft/min) Rate of sink: 0.48 m/s (94.5 ft/min)

Illustrations

Worked examples

Example 1 — a first encounter with Lange Antares

Start with the simplest possible case. Write down what Lange Antares 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 Lange Antares 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 Lange Antares 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 Lange Antares

In research: Lange Antares 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 Lange Antares 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: Lange Antares is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2000s German sailplanes, Aircraft first flown in 2003, Electric aircraft, so understanding it makes those chapters shorter.
In everyday life: Look for Lange Antares 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 Lange Antares in 20 minutes

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

Frequently asked questions

What is Lange Antares in simple terms?

Why does Lange Antares 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 Lange Antares?

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 Lange Antares.