> For the complete documentation index, see [llms.txt](https://docs.flightsim-studio.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flightsim-studio.com/boeing-727/performance/introduction.md).

# Introduction

As for every aircraft, there are extensive performance tables for every phase of flight for the 727. Our replica of the aircraft is based on the JT8D-9A engines.

The calculation of the performance can be quite complex. To give you an easy introduction to the 727, we automatically calculate the most important data for you in our clipboard. These are:

| Takeoff | Landing | Go Around |
| ------- | ------- | --------- |
| N1      |         | N1        |
| EPR     |         | EPR       |
| V1      | Vref    |           |
| Vr      |         |           |

All values take into account aircraft variables such as weight and flap position as well as the given weather.

For your convenience, you can also set the corresponding values directly via the respective “Set” button in the clipboard.

However, if you enjoy reading performance tables, we recommend the next page.