# R66 Weight & Balance > R66 helicopter weight and balance calculator with graphical CG display. (iPhone/iPad app by Michael Connor.) - Source: https://appshunter.io/ios/app/r66-weight-and-balance/id1113025052 (this page in markdown: same URL + `.md`) - Developer: [Michael Connor](https://appshunter.io/developer/862483678) - Category: Utilities, Education - Price: $0.99 - Rating: 3.30/5 from 3 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 9.1 · 10 MB - Languages: American English - Released: 2016-05-12 - Data updated: 2026-08-08 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/r66-weight-and-balance/id1113025052/reviews.md ## What is R66 Weight & Balance? R66 Weight & Balance graphs the center of gravity and weight with current fuel and at zero fuel. Want to know whether or not your heavy passenger *really* has to sit in the back and how much fuel must be maintained to stay in CG? This app will tell you at a much lower cost. This app will be a great help to new R66 pilots that need to quickly figure out if they have to put their 250lb. friend in back and the 160lb. teenager in front to maintain CG as well as how much fuel must be maintained to stay in CG in cases where it’s out of CG at zero fuel. It’s also a great educational tool for new pilots to quickly see how much influence a seemingly insignificant amount of weight has on CG. You’ll quickly find out why R66 pilots are most desirable in the 150 - 200lb. range. You’ll also discover why the R66 CG envelopes are beveled at the corners. The primary data displays are Longitudinal and Lateral graphs. You can look at the raw numbers if you want to, but it’s designed to give you CG data in graphical form. You’ll find yourself hardly ever looking at the raw number display. It is intended to be run on iPhone 5 and larger up through an iPad Pro. On an iPhone 4s, the graph will be compressed (good excuse to trade up). Features: • Shows CG for both zero fuel and current fuel. • Contains experimental support for auxiliary fuel tank that Robinson is working on. • If out of CG at zero fuel, it shows the minimum fuel that must be maintained to stay in balance. • Longitudinal and Lateral CG graphs. • Holds multiple R66 helicopters for those who fly more than one and can easily switch between them. • Accommodates the R66 Turbine and R66 Turbine Marine, though there isn’t any difference in the CG envelopes yet. • Individual weight entries for all seats and baggage compartments • Accommodates doors on & off; makes more difference than you would think. • Shows overweight warnings for the overall helicopter and combined seat & baggage. • Runs on iPhone 4s through iPad Pro. • Light weight app: uses little space and low CPU usage. ## Key features - Graphs center of gravity and weight - Calculates CG for current and zero fuel - Shows minimum fuel needed to stay in balance - Longitudinal and Lateral CG graphs - Supports multiple R66 helicopter profiles - Accommodates doors on/off - Overweight warnings ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/r66-weight-and-balance/id1113025052/reviews.md ### 4/5 — Good app, but doesn’t allow small auxiliary fuel tank *2025-04-09* I would give this five stars if it allowed me to put the 23.2 gallons in for the smaller auxiliary fuel tank. When I try to enter that and save it for my helicopter, it rejects it and asks me to put in a valid number of gallons. It only allows me to input the 43 gallons for the larger tank. ## Frequently asked questions about R66 Weight & Balance ### What is R66 Weight & Balance used for? R66 Weight & Balance is a utility app designed to help R66 helicopter pilots calculate and visualize the center of gravity (CG) and weight. It assists in determining the correct placement of passengers and fuel to ensure the helicopter remains within its operational CG limits. ### How much does R66 Weight & Balance cost? R66 Weight & Balance is a paid application, available for a one-time purchase of $0.99. This price provides access to all its features for managing helicopter weight and balance. ### What devices does R66 Weight & Balance support? The app is designed to run on iPhone 5 and larger devices, up through iPad Pro. It is compatible with iPhone, iPad, and iPod devices, though the display may be compressed on older models like the iPhone 4s. ### Does R66 Weight & Balance have ads? No, R66 Weight & Balance does not contain advertisements. As a paid utility app, it offers an ad-free experience for pilots managing their helicopter's weight and balance. ### How often is R66 Weight & Balance updated? The latest version of R66 Weight & Balance is 1.14, last updated on September 14, 2016. While updates have not been frequent recently, the app provides core functionality for R66 weight and balance calculations. ### What is the user sentiment for R66 Weight & Balance? Based on the available data, R66 Weight & Balance has a rating of 3.3 stars from 3 ratings. This suggests a mixed to positive reception from its user base. ### Does R66 Weight & Balance support auxiliary fuel tanks? Yes, R66 Weight & Balance includes experimental support for auxiliary fuel tanks. This feature is being developed in conjunction with Robinson, offering advanced capabilities for pilots. ### Can R66 Weight & Balance handle different R66 models? The app accommodates both the R66 Turbine and R66 Turbine Marine models. While there are no differences in CG envelopes currently, the app is designed to support these variations. ## Version history (last 3 releases) ### 1.14 — 2016-09-14 This update from Apple will improve the functionality of this app. No new features are included. Added gallons to the fuel quantity pickers for an easier time at the pump. ### 1.01 — 2016-05-24 Fixed a bug that added door weights to the empty weight versus subtract them (when removed). Updated anticipated Longitudinal & Lateral Arms for the upcoming auxiliary tank. ### 1.0 — 2016-05-12 No release notes. ## Apps similar to R66 Weight & Balance | App | Rating | Price | Category | | --- | --- | --- | --- | | [UN Decoder & Hazmat](https://appshunter.io/ios/app/un-decoder-and-hazmat/id6752623945) | — | Free | Utilities | | [Flight Computer E6B & Toolbox](https://appshunter.io/ios/app/flight-computer-e6b-and-toolbox/id6753596143) | — | Free | Utilities | | [PFSmarter: Flight Dispatch](https://appshunter.io/ios/app/pfsmarter-flight-dispatch/id6752538758) | — | Free | Utilities | | [VerticalWB](https://appshunter.io/ios/app/verticalwb/id6757898164) | 5.0 (6) | $1.99 | Utilities | | [Density Altitude Calculators](https://appshunter.io/ios/app/density-altitude-calculators/id6677017745) | 4.5 (2) | $2.99 | Utilities | | [I Fly Bell 407](https://appshunter.io/ios/app/i-fly-bell-407/id6747050989) | 5.0 (1) | Free | Utilities | ## More apps by Michael Connor - [R44 Weight & Balance](https://appshunter.io/ios/app/r44-weight-and-balance/id1099410583) - [R22 Weight & Balance](https://appshunter.io/ios/app/r22-weight-and-balance/id1105525529) All apps by Michael Connor: https://appshunter.io/developer/862483678 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-08.*