Aeroplane performance requirements
Can anyone help.
Am doing a bit of reading up on aeroplane performance and am coming across alot of the legal performance requirements pertaining to various phases of flight which we all should know, but maybe like myself don't (for now).
My question is, why a 3,3% climb gradient after take off. Who decided on 3,3%. Why should an aircraft land within 70% of the landing distance available.
Are these figures and percentages just a thumb suck or has serious research gone into making these law.
If anyone can help with some answers as to WHY it would be highly appreciated. Just makes it easier to explain it to the next chap.
Any source references would be great.
Thanks