# How can you calculate the gliding distance for a remote controlled jet?

Is there a way to calculate the gliding distance for a remote controlled (RD) jet aircraft, in case of engine failure? We have some telemetry data on the model, giving us speed and altitude so as to plug them on an equation or other model in estimating the glide distance, but we would not want to actually risk destroying the jet by testing a real life scenario.

So, for example, our maximum allowed altitude is 500ft Above Ground Level and its speed is about 150 knots; we are interested in calculating the gliding distance if engine power is lost or cut off (the engine is automatically cut off if the jet flies outside radio control range).

• You need to be a little more specific - what is the aspect ratio, wing shape, fuselage size etc. This would allow to estimate the drag, which is a necessary part of calculating lift/drag. This ratio will give you the glide ratio. Mar 28, 2015 at 7:26
• I don't see the risk in testing. Set it up ok a nice day, cut the engines, measure the glide, and restart the engines at, say, 100ft AGL. Mar 28, 2015 at 22:04
• Hi Peter, thanks for your answer. Assuming you have the quantities described above, it the computation straight forward or does it involve numerical analysis? I remember back in my grad school days we used Galerkin procedure to solve a number of differential equations, but it completely escapes me now.....is that what you are referring to? Mar 30, 2015 at 14:14