Hello My name is Eruna.
I am using the translation system
because I am not good at English at the Japanese.
It thought about a peculiar character to the helicopter as follows.
Though it is uneasy because whether it is translated well is not understoodâ€¦.
[Point of content of explanation]
Phenomenon to cause nose raising when helicopter advances.
It is a difference of the action point of the working gravity. the lift and the airframe of the rotor
It is confirmed with [my RC helicopter] and [CSM3in1]
[Jetcopter 2nd (flight simulator of a real machine)].
Addition of photograph and great correction of misprint
Excuse me, in Japanese
The expression might serve as a reference.
It is helicopter engineering. (Japanese)