Quote:
| Originally Posted by CCamper Whoops, hold on a minute! The boom isn't pressurized by the exhaust. There's a seperate fan driven by the engine that draws air in from the top of the boom, near the fuselage. Also, the majority of torque compensation is derived from the Coanda effect of the boom's design, not from vectored thrust. |
I said bypass air from the turbine was exhausted at the rectangular port,
not implying the exhaust was blown down the tail boom,it much to hot and the velocity is much to high.
I did not extrapolate where the bypass air came from,other than the turbine which is true.
While the "coanda effect" adds yaw stability,it's Built into the aircraft for longitudinal stability in flight and the pilot has no control,or lets say very little over this effect. the more air moving down over the tail boom the greater the effect.So the more power applied to the main rotor, the greater the effect. Most pilot controlled yaw is accomplished by a drum that rotates in the tail boom limiting or increasing the the bypass air.
Carl explained where it comes from so no need to repeat.
I think since I said bypass air was exhausted, Carl took I meant turbine exhaust, which passes Thur the main compressors and hot section.
I'm sure Carl has more experience than I, but technically what I said was correct.
If not ,Carls welcome to make additional corrections.