science

Horten H.V

Horten H.V 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 Horten H.V rather than just read about it. In short: The Horten H.V was a delta-winged, tail-less, twin-engined motor-glider designed and built in the late 1930s and early 1940s by Walter and Reimar Horten in Germany. The H.V aircraft were used for various experimental duties, including: innovative structure, performance, stability and control of flying wing aircraft.

Key takeaways

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

Reference excerpt

The Horten H.V was a delta-winged, tail-less, twin-engined motor-glider designed and built in the late 1930s and early 1940s by Walter and Reimar Horten in Germany. The H.V aircraft were used for various experimental duties, including: innovative structure, performance, stability and control of flying wing aircraft. The first H.V was the first aircraft to be built using an all composite material structure.

Design and development Reimar Horten developed a relationship with Dynamit AG, at Troisdorf, the major producer of phenolic resins in Germany. There he learnt of the various products available and how to use them in aircraft structures. After having built two Hols der Teufel wings from 'Dynal', a plastic composite material made from paper reinforced phenolic resin and incorporated other plastic materials in the Horten H.II, the Horten brothers took the next step and designed an aircraft to be built completely of Dynal, (with the exception of undercarriage, engine mounts, high strength fittings and cockpit framing). Structural components were moulded and assembled using glue and bolts through holes drilled in the components without bushings. Leading edge D-boxes were built up using sheets of Dynal glued either side of a 'Tronal' (wall board) core, cold pressed in moulds. The first H.V (later re-dubbed H.Va after two further aircraft were built) was powered by two 59 kW (79 hp) Hirth HM 60R engines driving specially carved pusher propellers directly, without gearboxes or extension shafts. Pilot and passenger lay semi-prone in the nose under extensive plastic sheet glazing. The undercarriage of the H.V was fixed, with a nosewheel just aft of the cockpit and two mainwheels under the engines, the fairings of which formed the only fin area to impart directional stability. One more aircraft was built, using conventional wooden materials: the H.Vb, which had two upright seats under individual canopies either side of the centre-section. After being abandoned to the elements the H.Vb was converted to the sole H.Vc with a single upright seat under a sideways opening canopy. The H.Vc was allocated the RLM ID number 8-252 (later re-used for the 1938-39 Junkers trimotor replacement for the Ju 52/3m) and by inference Horten Ho 252 though this was little used in practice.

Operational history The H.V(a) had a very brief career crashing on take-off for its first flight, after the nose rose alarmingly without enough control power to lower it. Walter Horten, the pilot, shut one engine down and closed the throttle on the other with difficulty, but was unable to prevent the aircraft sinking to the ground in a flat attitude at a high rate of descent. The H.Vb enjoyed a successful career but was eventually abandoned to the elements when the brothers had pressing wartime commitments. This aircraft was rebuilt as the H.Vc, flying in 1942. Eventually the H.Vc succumbed to a crash in 1943 after the pilot attempted a take-off with full landing flap selected, hit a hangar and dropped to the ground.

Variants H.V (H.Va) The World's first all composite aircraft, with 14 m (46 ft) span wings. H.Vb the second aircraft built with upright seats under individual canopies, with 16 m (52 ft) span wings.

H.Vc After falling into disrepair the H.Vb was rebuilt with a single seat under a sideways-opening canopy on the centreline.

Successor The Horten H.VII, developed during the Second World War, was based on the Horten H.V.

Specifications (H.Vb) Data from Horten NurflügelsGeneral characteristics Crew: 2 Wingspan: 16 m (52 ft 6 in) Wing area: 38 m2 (410 sq ft) Aspect ratio: 6.75 Empty weight: 1,360 kg (2,998 lb) Max takeoff weight: 1,600 kg (3,527 lb) Fuel capacity: 80 kg (180 lb) Performance

Maximum speed: 260 km/h (160 mph, 140 kn) Cruise speed: 230 km/h (140 mph, 120 kn) Stall speed: 82 km/h (51 mph, 44 kn) Landing speed: 70 km/h (43 mph; 38 kn) Never exceed speed: 350 km/h (220 mph, 190 kn) Wing loading: 38 kg/m2 (7.8 lb/sq ft) Power/mass: 13.5 kg/kW (22.2 lb/hp)

References

Illustrations

Worked examples

Example 1 — a first encounter with Horten H.V

Start with the simplest possible case. Write down what Horten H.V 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 Horten H.V 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 Horten H.V 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 Horten H.V

In research: Horten H.V 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 Horten H.V 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: Horten H.V is common in secondary-school and first-year university syllabi. It links to neighbouring topics Aircraft first flown in 1937, Flying wings, Glider aircraft, so understanding it makes those chapters shorter.
In everyday life: Look for Horten H.V 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 Horten H.V in 20 minutes

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

Frequently asked questions

What is Horten H.V in simple terms?

Why does Horten H.V 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 Horten H.V?

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 Horten H.V.