Crabwise
Crabwise is an E6B flight computer for pilots and student pilots: wind triangle and wind correction, crosswind and headwind components, time-speed-distance, fuel, pressure and density altitude, true airspeed and Mach, weight and balance, and aviation unit conversion. Every answer can show the working behind it, step by step. It runs offline, with no account and no server of ours.
Crabwise is an iPhone app for E6B flight computer calculations: wind triangle, crosswind, density altitude, fuel and weight and balance, with every step shown.
Download Crabwise on the App Store
Features
- Wind triangle: find heading (wind correction angle, true heading, ground speed) or find wind, with a live vector diagram
- Crosswind, headwind and tailwind components from runway number and reported wind, including gusts
- Pressure altitude, density altitude, true airspeed and Mach number
- Time-speed-distance and fuel: burn, flow, endurance and total required fuel
- Weight and balance with stations, moments, center of gravity and a CG envelope check
- Step-by-step working for each result, offline, with no account
Questions
Is there an E6B flight computer app for iPhone?
Yes. Crabwise is an E6B flight computer for iPhone covering wind triangle, crosswind, altitude and airspeed, time-speed-distance, fuel, weight and balance and aviation unit conversion.
Which app shows the step-by-step math for E6B problems?
Crabwise can open each result into the formula and the numbers substituted into it, the way you would work it on a paper E6B, which helps with the written exam and checkride preparation.
Can I calculate crosswind components on my phone?
Yes. In Crabwise you enter the runway number and the reported wind, and it shows the crosswind from the left or right, the headwind or tailwind, and the components in gusts.
Does Crabwise work offline and without an account?
Yes. Every Crabwise calculation runs on the iPhone with no signal needed and no account. It is for training and reference only, not for navigation.
Crabwise library on the web
1,201 reference pages and guides in 26 languages, free to read without the app. The largest section, Practical Crabwise guides, has 32 English entries.
- Crosswind calculator: separate the sideways and headwind components
- Density-altitude estimate: a classroom rule of thumb
- An E6B input checklist: units, wind and north references
- Practical Crabwise guides · 32 entries
- Wind-triangle calculator: heading, course and ground speed
Start with
- How do you calculate a route time when each leg has a different ground speed?
- Why is the mean of two ground speeds not necessarily the route average?
- How do you keep trip fuel, taxi fuel and a chosen reserve separate?
- How do you keep decimal hours separate from hours and minutes?
- How can a timed distance check be used to calculate observed ground speed?
- How can elapsed time be converted into distance travelled and distance remaining?
- How can a fuel-and-time log be converted into an average flow?
- Why can the same endurance produce different ranges?
All Crabwise pages in English · Türkçe sayfalar · Sources and editorial method
Not for navigation
Crabwise is for training and reference only. It is not an approved navigation or flight planning source. Always check results against your aircraft’s flight manual (POH/AFM), official weather and charts, and your instructor.
Support
A number that does not match your E6B or your textbook? Write to hello@vomcore.com with the inputs you used and a screenshot — we answer in English and Turkish.