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One search, a wider view.
Search across aircraft, engines, flight science and glossary terms. Follow the result that catches your curiosity.
Search all of Owl THE FREE AVIATION REFERENCE
A world of flight.
Open to everyone.
Aircraft. Engines. The science that connects them.
Explore a growing aviation database, one detail at a time.
Always free to explore No sign-in needed
AIRCRAFT / ENGINEERING / UNDERSTANDING
owl. REFERENCE INDEX
Aircraft library306 models & variants
Engines library426 engine records
Flight science36 conditions & concepts
A little more knowledge.A wider horizon.
YOUR CURIOSITY. NO BARRIERS.
Aircraft specifications Engine engineering Weather & physics
THREE WAYS INTO AVIATION
Start anywhere.
Understand more.
For students, enthusiasts, and curious professionals.
A reference worth coming back to.
306 models & variants
Aircraft library
From commercial airliners to business jets. Explore families, compare variant specifications, and follow the engineering.
Explore aircraft families426 engine records
Engines library
Get closer to the powerplant. Discover engine architectures, thrust, fuel-flow references, and aircraft connections.
Explore the engines36 conditions & concepts
Flight science
Understand wind shear, lift, icing and more through physical mechanisms, equations, and connected explanations.
Understand the scienceLOOK A LITTLE CLOSER
A familiar silhouette.
A thousand details.
A wingspan tells one part of the story. The engine, weight, and operating environment add the rest. Owl brings those references together, so one discovery can lead naturally to the next.
Get to know an aircraftBUILT FOR THE CURIOUS
More than a list of specifications.
Find the right reference.
See the differences. Understand the terminology.
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The difference is in the details.
Compare up to three aircraft or engines side by side, with highlighted differences and the original source context.
Build a comparison03
Speak the language of flight.
From MTOW to Mach, find clear definitions of aviation terms and continue into the science behind them.
Open the glossaryA FEW GOOD STARTING POINTS
Pick a heading.
No syllabus. No sign-up.
Just something worth discovering.
BEFORE YOU EXPLORE
A few things
worth knowing.
Is Owl free to use?+
Yes. All of Owl’s reference libraries, search, comparisons, and glossary are freely accessible. There is no account or subscription required.
Which aircraft and engines are included?+
The collection focuses on commercial, regional, and business aircraft, with engine records spanning several manufacturers and architectures. You’ll find both model-level references and selected variants; coverage continues to grow.
Can I check where a specification comes from?+
Yes. Detail pages include source references, editions, retrieval dates, and coverage notes. Comparison cells retain their own source context, and missing values are clearly marked.
Can I share a comparison?+
Yes. Choose two or three aircraft or engines, then copy the comparison link. The selected records are included in the URL, so someone else can open the same view.
KNOW WHERE KNOWLEDGE COMES FROM
Open access.
Clear references.
Aircraft and engine records bring together FAA data, OpenAP research references, and selected manufacturer specifications. Flight Science connects original explanations with FAA and NASA educational material.
This is a growing collection. Coverage varies, and missing specifications are clearly marked. Each detail page carries its source context, so you can follow the reference further.
View provenance & licensesFOLLOW YOUR CURIOSITY
Your next discovery
is already here.
Search a familiar aircraft. Meet its engine. Understand the forces behind its flight.