Flight Computer
Help with Flight Computer. If something does not look right, tell us — a wrong number is the one thing this app cannot afford. Flight Computer 的使用帮助。如果结果看起来不对，请告诉我们 —— 算错是这类工具唯一不能容忍的问题。
Product page · Privacy Policy · iPhone and iPad 产品页 · 隐私政策 · iPhone 与 iPad
Contact us联系方式
Email support@ai123.xyz and we will reply within two business days. Please include your device model, your OS version, and the inputs you used. 请发邮件至 support@ai123.xyz，我们会在两个工作日内回复。请附上设备型号、系统版本和你输入的数据。
Frequently asked questions常见问题
Does the app need an internet connection?App 需要联网吗？
No. Every formula, constant and conversion factor is built into the app. It works with no signal and in airplane mode. The only thing that opens a connection is tapping a link to this website, which your browser handles.不需要。所有公式、常数和换算系数都内置在 App 内，没有信号或开启飞行模式都能正常工作。唯一会联网的地方是你主动点开指向本网站的链接，那由浏览器处理。
Why does my answer differ from another E6B app?为什么我的结果和其他 E6B App 不一样？
Most differences come from the assumptions, not the arithmetic. Pressure altitude: the teaching rule of 1,000 ft per inHg (30 ft per hPa) is about 6.7% away from the exact standard atmosphere. True airspeed: the “add 2% per 1,000 ft” rule gives a different answer from the density-based calculation. Weight and balance: it depends entirely on the arms you entered. Tap “Show working” on any result to see the formula and the exact substituted values, and the app will tell you where the two conventions differ instead of hiding one of them.差异通常来自口径而不是算式。气压高度：教科书里“每 inHg 一千英尺”（每 hPa 三十英尺）的规则，与标准大气的精确值相差约 6.7%。真空速：“每 1000 英尺加 2%”的规则式与按密度比计算的精算式结果不同。载重平衡：完全取决于你填的力臂。在任意结果上点“计算过程”就能看到公式与实际代入的数值 —— 两种口径的差在哪，App 会直接写出来，而不是藏掉其中一个。
Where do the formulas come from?这些公式从哪来的？
From public sources: the FAA Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C, chapters 4, 8, 10, 11 and 16) and the ICAO standard atmosphere. The Sources screen inside the app lists each formula against its chapter and gives the date the numbers were last checked against the handbook's own worked examples. The app is not approved by, endorsed by, or affiliated with the FAA or any aircraft manufacturer.来自公开资料：美国联邦航空局《飞行员航空知识手册》（FAA-H-8083-25C，第 4、8、10、11、16 章）与 ICAO 标准大气。App 内的“数据来源”页逐条列出公式对应的章节，并注明最后一次用手册自带例题核对这些数字的日期。本 App 未经 FAA 或任何飞机制造商认可、背书，也与它们无关联。
Can it replace my POH/AFM?它能替代我的 POH/AFM 吗？
No, and it is built so that it cannot be mistaken for one. It contains no aircraft performance data at all: no takeoff or landing distances, no climb or descent profiles. It also ships no weight-and-balance data — arms, maximum weights and centre-of-gravity limits come from you. Every result carries a “Verify with your POH/AFM” reminder, and all flight decisions and all risk remain with the pilot in command.不能，而且它是按“不可能被当成 POH/AFM”来设计的。App 内不含任何机型性能数据：没有起飞/着陆距离，没有爬升与下降剖面。也不含任何载重平衡数据 —— 力臂、最大重量和重心限制全部由你填写。每个结果都带“以你的 POH/AFM 为准”的提示，所有飞行决策与风险由机长负责。
Does the app collect my data?App 会收集我的数据吗？
No. There is no account, no analytics and no advertising, and nothing you type is transmitted anywhere. See the Privacy Policy for details.不会。没有账号系统、没有统计分析、没有广告，你输入的任何内容都不会被传输到任何地方。详见隐私政策。
Is it a subscription?是订阅制吗？
No. It is a one-time purchase: no subscription, no in-app purchases, no ads, and no account to create. The whole app keeps working offline.不是。买断制：没有订阅、没有 App 内购买项目、没有广告，也不需要注册账号。全部功能离线可用。