science

Lippisch Delta IV

Lippisch Delta IV 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 Lippisch Delta IV rather than just read about it. In short: Alexander Lippisch's Delta IV was a continuation of his work on delta wing designs pioneered in his Delta I, Delta II and Delta III aircraft. Design and development Fieseler F 3 Wespe The project began with an order from Gerhard Fieseler for a design that his company could build for him to fly in the 1932 Europarundflug air rally.

Key takeaways

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

Reference excerpt

Alexander Lippisch's Delta IV was a continuation of his work on delta wing designs pioneered in his Delta I, Delta II and Delta III aircraft.

Design and development

Fieseler F 3 Wespe The project began with an order from Gerhard Fieseler for a design that his company could build for him to fly in the 1932 Europarundflug air rally. The result was a highly unorthodox design, sporting large delta wings, canards, and an engine and propeller mounted in both the nose and tail of the plane. Fieseler built this design as the F 3 Wespe ("Wasp"), but it proved highly unstable, causing Fieseler to crash it on his first flight. Further refinements were unable to correct these deficiencies, and after one final crash, Fieseler abandoned the aircraft.

DFS 39 Lippisch continued to believe that the problems were surmountable, and found an ally in Professor Walter Georgii of the DFS (Deutsche Forschungsanstalt für Segelflug – German Research Institute for Sailplane Flight). Georgii secured funding from the RLM (Reichsluftfahrtministerium – Reich Air Ministry) to purchase the aircraft from Fieseler and work on perfecting it. At the DFS, Lippisch rebuilt the aircraft, removing the canards and the rear engine and renaming it the Delta IVa. Although this flew much better than its predecessor, it was still involved in a very serious crash which led to an investigation of Lippisch's endeavours. The RLM and the DVL (Deutsche Versuchsanstalt für Luftfahrt – German Aviation Research Institute) eventually concluded that the Delta series was not only dangerous, but an aeronautical dead end. Only Georgii's continued support prevented them from ordering the discontinuation of the research. The aircraft was rebuilt again, this time incorporating new aerodynamic refinements based on Lippisch's experiences with his recent Storch X glider. The new incarnation, dubbed Delta IVb proved to be a step in the right direction. Success finally came with a last round of changes. The aircraft was rebuilt yet again, making the sweep of its wings less severe, and adding small, downturned fins at their tips. The fuselage was lengthened somewhat, and a small rudder was added to it. Now called the Delta IVc, the result was finally what Lippisch had been looking for. In 1936, the aircraft was taken to the Luftwaffe flight-testing centre at Rechlin where test pilot Heini Dittmar put it through its paces, gaining an airworthiness certificate for the type and an official RLM designation – DFS 39.

Messerschmitt Me 163 It proved to be an extremely stable and well-behaved design, and now attracted the interest of the RLM as the basis for a rocket-powered research aircraft. The work was kept secret and the new variant of the Delta IV referred to as Project X. The airframe was to make significant use of metal construction, which was not available at the DFS, so Lippisch and Projekt X were transferred to Messerschmitt. It was redesignated the Me 163 and would eventually appear as the Messerschmitt Me 163 Komet rocket fighter.

Specifications (DFS 39d)

Data from Die Deutsche Luftrüstung 1933–1945 Vol.1 – AEG-Dornier General characteristics Crew: 2 Length: 5.4 m (17 ft 9 in) Wingspan: 9.6 m (31 ft 6 in) Height: 1.8 m (5 ft 11 in) Wing area: 13.4 m2 (144 sq ft) Empty weight: 390 kg (860 lb) Max takeoff weight: 600 kg (1,323 lb) Fuel capacity: 150 L (40 US gal; 33 imp gal) fuel; 16 L (4.2 US gal; 3.5 imp gal) oil Powerplant: 1 × Pobjoy R 7-cylinder air-cooled geared radial piston engine 85 PS (84 hp; 63 kW) Propellers: 2-bladed wooden fixed-pitch propeller, 2.1 m (6 ft 11 in) diameter Performance

Maximum speed: 220 km/h (140 mph, 120 kn) at sea level Cruise speed: 180 km/h (110 mph, 97 kn) Landing speed:70 km/h (43 mph; 38 kn) Range: 1,350 km (840 mi, 730 nmi) Service ceiling: 6,300 m (20,700 ft) Rate of climb: 5.8 m/s (1,140 ft/min) Time to altitude: 1,000 m (3,300 ft) in 3 minutes

References

External links

DFS 39 prototype – Wehrmacht History

Illustrations

Worked examples

Example 1 — a first encounter with Lippisch Delta IV

Start with the simplest possible case. Write down what Lippisch Delta IV 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 Lippisch Delta IV 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 Lippisch Delta IV 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 Lippisch Delta IV

In research: Lippisch Delta IV 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 Lippisch Delta IV 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: Lippisch Delta IV is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1930s German experimental aircraft, Aircraft first flown in 1936, Lippisch aircraft, so understanding it makes those chapters shorter.
In everyday life: Look for Lippisch Delta IV 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 Lippisch Delta IV in 20 minutes

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

Frequently asked questions

What is Lippisch Delta IV in simple terms?

Alexander Lippisch's Delta IV was a continuation of his work on delta wing designs pioneered in his Delta I, Delta II and Delta III aircraft. Design and development Fieseler F 3 Wespe The project began with an order from Gerhard Fieseler for a design that his company could build for him to fly in t…

Why does Lippisch Delta IV 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 Lippisch Delta IV?

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 Lippisch Delta IV.