That Looks About Right

How it works

TLAR's performance engine runs a physics and aerodynamic model that predicts aircraft performance in real time. Once per second it calculates the three-dimensional position, attitude and speed of your aircraft as a function of the physical forces, such as lift versus weight and thrust versus drag, that affect all aircraft as they move through the air.

Why should you care? This lets TLAR make reasonably accurate predictions of performance between and beyond the conditions explicitly covered by the POH.

Why we built it

We created TLAR to fill what we saw was a need in the general aviation community. Having “grown up” steeped in military aviation, complete with solid performance manuals and information, we were disappointed by the lacking or partially complete performance information in some general aviation pilot operating handbooks, especially for experimental category aircraft.

Flying backcountry in the mountains of Idaho, Nevada, Oregon, Utah, Colorado and others, it became an especially acute need for us to create something that could reasonably estimate aircraft performance. TLAR was born of this need.

The name

Like many terms used within TLAR, the name comes from a military aviation acronym. TLAR stands for “That Looks About Right,” which in military circles is usually said with one's thumb held high, acting as a gunsight. It means that what follows is an estimate: accurate enough to be useful, but not something to be taken as precisely correct.

That's the spirit of the app. TLAR is a disciplined cross-check for planning and flight. It doesn't replace the aircraft flight manual, placards, certified instruments, published procedures, current weather information or pilot judgment.

Who we are

TLAR is built by Owyhee Aviation, LLC, a small veteran-owned company dedicated to serving the general aviation community. We're located in the USA in Boise, Idaho, and take our name from the local Owyhee mountains: a truly stunning place to fly!

We welcome any suggestions to improve TLAR's design or accuracy: .