Location of COG on F16?

saberrider · by **saberrider** » 30 Jan 2017, 18:34

Does someone on this forum know were it is the location of Center of Gravity on F 16? I want to know if it is between main landing gear and front landing gear or little behind (reference point is AR scope)

meatwod · by **meatwod** » 30 Jan 2017, 18:53

Main gear is just below the CG which allows the AC tilt easily for take-off. Since the F-16 is unstable, the Center of Lift is probably slightly forward of the CG, but not more than a few inches.

saberrider · by **saberrider** » 30 Jan 2017, 19:03

Thank you , I wanted to know for my simulator to correctly apply it at the right spot. But it is at midline or bellow?

johnwill · by **johnwill** » 30 Jan 2017, 22:00

CG can vary as much as 10 inches. Average location is forward of the main gear, about 10% of the distance from the main gear to the nose gear. Without tanks or bombs, vertical CG is a few inches above mid line due to fuel. With heavy external stores, it is a few inches below mid line.

saberrider · by **saberrider** » 30 Jan 2017, 22:18

Thanks.https://www.youtube.com/watch?v=yL3t6GKWB0c. In this video at min. 4*17 after landing and bounce LEFs remain UP with aircraft standing in air.How it this possible ?

johnwill · by **johnwill** » 31 Jan 2017, 00:52

Before main gear touchdown the LEF is scheduled by AoA. When main gear touches down and weight on wheels switch closes, LED goes to 2 deg up if throttle is at idle. As you noticed, the main gear came off the ground. Why does LEF stay up? Because the throttle is at idle. If throttle is advanced, the airplane thinks the pilot is doing a touch and go and wants to take off again, so starts scheduling the LEF again.

Many F-16 landings (maybe most) have a small wheel bounce, so the LEF logic was designed to handle that without unnecessarily driving the LEF.