biology

Lockheed L-301

Lockheed L-301 is a biology 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 Lockheed L-301 rather than just read about it. In short: Lockheed L-301 (sometimes called the X-24C, though this designation was never officially assigned) was an experimental air-breathing hypersonic aircraft project. It was developed by the NASA and United States Air Force (USAF) organization National Hypersonic Flight Research Facility (NHFRF or NHRF), with Skunk Works as the prime contractor.

Key takeaways

Lockheed L-301 belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Lockheed L-301 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Lockheed L-301 from memory before moving on to harder problems.

Reference excerpt

Lockheed L-301 (sometimes called the X-24C, though this designation was never officially assigned) was an experimental air-breathing hypersonic aircraft project. It was developed by the NASA and United States Air Force (USAF) organization National Hypersonic Flight Research Facility (NHFRF or NHRF), with Skunk Works as the prime contractor. In January 1977, the program was "tentatively scheduled to operate two vehicles for eight years and to conduct 100 flights per vehicle." NASA discontinued work on L-301 and NHRF in September 1977 due to budget constraints and lack of need.

Development The X-24C-L301 was a scaled-up derivative of the Martin X-24C project that was to have been a hypersonic follow-on to the X-15 and X-24 (specifically the X-24B) programs, to take lessons learned from both and integrate them into an airframe capable of at least reaching Mach 8 and engaging in hypersonic skip-glide maneuvers for long range missions. The vehicle would have used both air breathing ram or scramjet propulsion as well as a rocket engine, carrying both RP-1 and LH2 propellant as well as on-board stores of LOX. The X-24C-L301 languished at the design phase when the X-24C project was shelved in September 1977 due a tight NASA budget.

Design

Propulsion Originally intended to carry the same XLR-99 engine used by the X-15, the primary engine was changed to the LR-105, which was the sustainer engine used on the Atlas launcher. This rocket engine, burning RP-1 and LOX, was intended to accelerate the X-24C to hypersonic speeds in order to ignite the hydrogen fueled, air breathing ram/scramjet mounted in the belly of the airframe with which it would attain cruise speeds of at least Mach 6 and peak velocities of Mach 8+ at altitudes of 90,000 feet (27,000 m) or more. As such, this vehicle was plainly not intended to reach orbit.

Airframe Design of the aircraft in various wind tunnel models and contractor drawings seems to follow variations of the FDL-5 and FDL-8 lifting body shapes originally developed by the USAF Flight Dynamics Laboratory in the 1950s, which were used in the earlier X-23 and X-24A/B programs. With a radically swept delta wing, and 2, 3, or 4 vertical stabilizers, as well as several body flaps (depending on the model), the vehicle did not lack for control surfaces. The vehicle measured 74 feet 10 inches (22.81 m) long, 24 ft 2 in (7.37 m) wingspan, and 20 ft 7 in (6.27 m) height. Various drawings show a payload bay 12 feet (3.7 m) long and perhaps 5 feet (1.5 m) diameter.

References

Further reading Miller, Jay. The X-Planes: X-1 to X-45. Hinckley, UK: Midland, 2001. Rose, Bill, 2008. Secret Projects: Military Space Technology. Hinckley, England: Midland Publishing.

External links Operators’ reference drawing [1], [2], [3] Encyclopedia Astronautica Publicly archived Air Force picture Nasa Archives- X-24C Phase 3

Illustrations

Worked examples

Example 1 — a first encounter with Lockheed L-301

Start with the simplest possible case. Write down what Lockheed L-301 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Lockheed L-301 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 Lockheed L-301 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 Lockheed L-301

In research: Lockheed L-301 appears in biology 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 Lockheed L-301 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: Lockheed L-301 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Aircraft with retractable tricycle landing gear, Cancelled American spaceplanes, Cancelled NASA spacecraft, so understanding it makes those chapters shorter.
In everyday life: Look for Lockheed L-301 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Lockheed L-301” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Lockheed L-301 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Lockheed L-301 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 Lockheed L-301 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Lockheed L-301 in simple terms?

Why does Lockheed L-301 matter?

Because it connects several biology 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 Lockheed L-301?

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 Lockheed L-301.