Estimate still-air glide range, glide time, and sink rate from altitude, speed, and lift-to-drag ratio.
Glide range
18.00 km
38.0 m/s groundspeed
Sink rate
3.17 m/s
V divided by L/D 12.0
Glide time
7.89 min
1,500 m altitude available
Altitude converts to horizontal distance through L/D, then wind changes the ground track covered in the same descent time.
range 18.00 km
Glide ratio
L/D 12.0
Still-air reach
18.00 km
before wind correction
Wind component
no wind correction
same as still air
Descent rate
3.17 m/s for 7.9 min
This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.
Open source: review the implementation and see how the results are produced.
Embeddable: preview this tool, copy the iframe, and use it in your own site or LMS.
Estimate still-air glide range, glide time, and sink rate from altitude, speed, and lift-to-drag ratio.
Glide range
18.00 km
38.0 m/s groundspeed
Sink rate
3.17 m/s
V divided by L/D 12.0
Glide time
7.89 min
1,500 m altitude available
Altitude converts to horizontal distance through L/D, then wind changes the ground track covered in the same descent time.
range 18.00 km
Glide ratio
L/D 12.0
Still-air reach
18.00 km
before wind correction
Wind component
no wind correction
same as still air
Descent rate
3.17 m/s for 7.9 min
This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.
Open source: review the implementation and see how the results are produced.
Embeddable: preview this tool, copy the iframe, and use it in your own site or LMS.