Primarily for general aviation discussion, but other aviation topics are also welcome.
jrp wrote:So how does it do that? What do you mean by total energy? And why don't powered aircraft have them?

As @Flyin'Dutch' says they would not be helpfull to a powered aircraft - if you inadvertently slow up, and therefore climb at 200fpm you want to know about it. Also my guess is they would'nt work very well anyway - the maths (AFAIK) depend on the ability of a glider to trade height and speed very efficiently - it's quite easy to do a low level pass at 100kt plus, pull up and then complete a circuit

A PA28 or C150 etc is not as efficient as this engine-off!

PS The vapour trails are water ballast being dumped.
Last edited by ls8pilot on Sun Nov 22, 2020 6:08 pm, edited 1 time in total.