26:14

Piston vs. Turbine Engines WHICH IS SAFER??

14:45

Helicopter Control - Flapping

21:19

Is the Robinson R44 A SAFE HELICOPTER

23:03

First Walkthrough Of The Hill HX50!!!

10:26

WHY ARE HELICOPTERS SO EXPENSIVE TO RUN??

8:42

Types of Rotor Systems in Helicopters

7:10

WHY HELICOPTERS GET GROUND RESONANCE

12:57

Fixed pitch Coaxial Helicopters are they any GOOD? Homemade rotary wing aircraft