Can a helicopter make a loop?

In the movie "Blue Thunder" the helicopter makes a 360 loop. Is this possible?

Can a helicopter make a loop?
Check out these videos on youtube:


http://www.youtube.com/watch?v=53y8An1zA...





http://www.youtube.com/watch?v=SXLfpeyRz...





http://www.youtube.com/watch?v=MgoRtoZub...





The last one here is a bit famous, because when Bell Helicopter found out about it, they declared that the helicopter was not airworthy anymore, due to the maneuver. Don't know if it's true or not, but that's the story.





Most helicopters are not rated for this type of maneuver, as others have said.
Reply:Yes, it can.





A loop is a fairly benign aerobatic maneuver.





The pilot would start at altitude flying at his maximum cruising speed. He'd then dump the nose and build even more speed to almost his airframe limited speed, at which point he'd smoothly pull back on the stick until he reached vertical and beyond.





Because helos are not rated to high negative gs, he'd have to be careful to keep positive g on the helo while pulling over the top. Then, as his speed built again, he'd need to watch his airspeed and g to not overstress the helo while pulling out. This might require descending through his original altitude.





BTW, I'm assuming a fairly high performance helicopter. Not all planes can do a loop, and neither can all helos. But, certainly, some of each can can.





ANY aircraft can do a barrel roll, but that's another story.
Reply:There are only a limited number of helicopters that can perform this maneuver. They must be of the "rigid rotor" type such as the Apache, BO-105 or the Notar.





Chuck Aaron performs this and more maneuvers in the Red Bull BO-105 aerobatic helicopter. He also does an amazing "back flip" which starts from hovering level flight, he then pulls the helicopter up and over backwards for a perfect back flip!
Reply:in holly wood, yes
Reply:* in hollywood, Blue Thunder and Airwolf can


* in real life, only a few can, including aeromodelling helis


* european-made military helicopter "Tiger" can do a 360 loop,


you can see helicopter "Tiger" in the 007 movie "Golden eye"


but it didn't do the manoeuver.





ryanop@yahoo.com ;)



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