Guides, methodology and aviation analysis
Deep-dives on route planning, aircraft range, ETOPS, wind modelling, and the aviation concepts behind everything the tool does.
In Range Is Not Enough: Can Your Aircraft Actually Land There?
ETOPS coverage used to ask only whether a diversion airport was in reach. Now Great Circle Pro checks every alternate for a paved runway long enough to land your specific aircraft, from a 777 that needs 7,000 ft to a business jet happy with 2,800. Teal, amber, and red at a glance.
The Most Fuel Efficient Aircraft: Every Airliner and Business Jet, Charted
Plot every airliner and business jet by range and fuel burn per seat and the ranking surprises: the champion is a single-aisle narrowbody, not a Dreamliner or A350. A walk down the efficiency frontier.
How Far Can a Private Jet Fly? Range by Class, Mapped
From a 1,200 nm Vision Jet to the 7,700 nm Global 7500: every class of business jet drawn as real range rings from Teterboro, the city pairs each ring opens, and the derates the brochure never mentions.
The 10 Longest Flights in the World, Mapped
Ten routes, one map. The world's longest nonstops drawn as true great circles, including the Singapore to New York path that passes about 160 nm from the North Pole, and the physics that decides where the list ends.
Boeing 737 MAX 7 vs 8 vs 9 vs 10: Why Capacity, Not Range, Drives Mission Fit
Draw all four MAX variants and their range circles nest closely, the family trades seats, not reach. Here is how they compare, whether they share ETOPS, and which missions each one is built for.
Fuel Carries Fuel: The Breguet Effect in Aircraft Fuel Burn
An aircraft burns more fuel early in a flight than late, because it sheds weight as it burns. See the Breguet effect on an interactive chart, and how Great Circle Pro models it while leaving published ranges untouched.
Boeing 787-9 Range Circles: Anchorage vs Houston
Draw the same 787-9 from ANC and IAH. On a normal day the circles nearly match, but conservative hot-day planning can make the colder airport's usable-reach circle larger.
Hot and High: Why Some Airports Quietly Shrink an Aircraft's Range
Thin air at high-elevation airports cuts takeoff weight and reach. Here is how the hot-and-high penalty works, and why it trims the range circle at places like Denver, Bogota, and La Paz.
The Anchorage Tech-Stop Comeback: Which Aircraft Need ANC to Go Around Russia
Russian-airspace detours can add roughly 1,500 to 2,000 nm on some Europe to East Asia routings. Which aircraft absorb the extra arc nonstop, and which may need an Anchorage fuel stop.
Airspace Avoidance Routing: Russia, Belarus and the New Long-Haul Geometry
Why a London to Tokyo great circle now looks nothing like the way the flight is actually flown, and how the Airspace toggle on the Flight Plan tool reshapes the routed distance and block time.
ETOPS Explained: How Twin-Engine Jets Cross Oceans
What ETOPS ratings mean, how diversion time limits shape oceanic routes, and why conservative wind assumptions matter in oceanic planning.
Great Circle vs Rhumb Line: Which Route Is Actually Shorter?
Why the shortest path between two cities arcs over the poles on a flat map, and what that means for how dispatchers actually plan and fly global routes.
Aircraft Range Circles: What They Are and Why They're Never a Perfect Ring
Wind at cruise altitude can shift an aircraft's reach by hundreds of nautical miles depending on direction. Here's what a range circle actually represents, who uses them, and how we build ones that reflect reality.
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