Inverted UH-60..

[dustdevil]

This is a repost from the "Turkish Arm Forces.." thread, please delete if you feel it's redundant.

I saw this photo when I was a child, nearly 15 years ago. I thought it was normal for Blackhawk pilots to do this, but I never saw any other inverted Blackhawk photo so concluded it must be a rare thing. In case you miss it in the other thread..

http://img113.exs.cx/img113/6928/jandarma2yh.jpg


Please post if you have similar pics...

[king_nothing100]

See the AAC loop their Lynx, back flip and fly it backwards it every year at the air show. Got a photo of a looping AH-64, post it later.

[akmarine]

I'm sure even the original designers are looking at that photo suprised that it could do that.

[dustdevil]

I've seen agile helos like AH-1 and AH-64 looping but not this particular helo :)

One of my friends said this maneouver was performed after a bet between Turkish pilots and Sikorsky officials. I can't confirm it yet. Also another friend said this photo was at the back cover of a Sikorsky sales sheet. I've also read somewhere on the net that UH60 is capable of doing this.. Anyway it's a good pic..

[Sloppy Joe2]

cool pic i dont think the guys in the back will like that to much :lol:

[Zorro C9]

Have they got a rigid swashplate?

[m230e1]

The aircraft is more than capable. Loops and rolls are well within it's flight envelope. Technique is what is at issue for those types of maneuvers. The average pilot may be able get through a move like that, but skill to near perfection is what's needed to do it on a whim or at the drop of a hat. There are alot of structural limitations and more importantly laws of physics that have to be observed or else catastrophe awaits.

Apaches, Blackhawks, and dare I say it, Chinooks are all capable. Sustained inverted flight is out of the question with helicopters (except for radio controlled ones) because the blades won't provide lift in the needed direction.

[szr]

I'd give my firstborn son to see a CH-53 or a 47 do a roll..

[vryhpyammoadded]

There used to be an old late 60s ish ad in US Naval Institute Proceedings demonstrating the maneuverability of the CH53 with it doing barrel rolls and loops.

[Malc]

The aircraft is more than capable. Loops and rolls are well within it's flight envelope. Technique is what is at issue for those types of maneuvers. The average pilot may be able get through a move like that, but skill to near perfection is what's needed to do it on a whim or at the drop of a hat. There are alot of structural limitations and more importantly laws of physics that have to be observed or else catastrophe awaits.

Apaches, Blackhawks, and dare I say it, Chinooks are all capable. Sustained inverted flight is out of the question with helicopters (except for radio controlled ones) because the blades won't provide lift in the needed direction.

Ive seen the Lynx do substained inverted flight

[scrybe]

Very impressive. I didn't realise so many active duty helos were capable of doing that.

[usm2b]

http://rud.hjem.wanadoo.dk/skag/F16inverted.jpg

Found this inverted pic too p-)

[Gremlin29]

Guys, I'm an old US Army aviator that flew UH-60's. I also AQC'd and have hundreds of hours logged UH-1's, AH-1's and OH-58's (A's and C's). Yes the Hawk can loop and roll (I've seen it), it's common knowledge in the rotary wing community. The first loops and rolls were performed by Sikorsky test pilots back in the 70's and it's a maneuver that's been illegally performed by numerous army pilots since the Hawk entered service back in 79. If a helicopter has a rigid, articulated rotor head it can most likely perform a loop, and a roll. Even helicopters with a semi rigid underslung rotor such as that found on UH-1's and AH-1's have been looped. It's an energy maneuver that can be accomplished as long as their's sufficient altitude at the beginning of the maneuver and positive G is maintained throughout. The rotor system is huge gyroscope, if you unload it (negative G) it will not follow the aircraft through the maneuver properly and most likely contact the tail boom for a spectacular if not somewhat short lived termination of flight.

CH-47's can not loop. NO manned helicopter in the world today is capable of sustained inverted flight, it's impossible. Turbine powered aircraft (like the Lynx) have a governor that adjusts fuel flow to the engine(s) based on the amount of pitch being pulled and rotor RPM, it works more or less like an automatic transmission but it only controls fuel (power) to the engine. Secondly, the rotor blades are not configured to produce lift in the inverted position either by design or rigging. Sustained inverted flight would mean the aircraft could fly without loss of altitude inverted. Trust me, when your inverted in a helicopter you lose all kinds of altitude... really fast.

Even though many of the aircraft the army flies are more than capable of these maneuvers, they are not often seen for a number of good reasons. The first reason is that ALL army aircraft dash 10's (operators manual's) define the bank and pitch limitations as +/- 30 degree's pitch, +/- 60 degree's bank. You NEVER operate an aircraft beyond published limitations without serious repercussions that would most likely end your career. It's not coincidental that the these maneuvers are performed on the sly so to speak, rather than in public where your tail number can be grabbed by a camera. By coincidence, Army flight regs (AR 95-1) prohibit aerobatic maneuvers which are defined by the Army and the FAA (they have rules against aerobatics as well) as +/- 30 degree's pitch, +/- 60 degree's bank. Hmmmm, do you think the limitations in the -10 are coincidentally the same for every aircraft AND Army/FAA regs? Second reason, it's not practical and it's fairly dangerous for inexperienced pilots.

[Wilco]

Guys, I'm an old US Army aviator that flew UH-60's. I also AQC'd and have hundreds of hours logged UH-1's, AH-1's and OH-58's (A's and C's). Yes the Hawk can loop and roll (I've seen it), it's common knowledge in the rotary wing community. The first loops and rolls were performed by Sikorsky test pilots back in the 70's and it's a maneuver that's been illegally performed by numerous army pilots since the Hawk entered service back in 79. If a helicopter has a rigid, articulated rotor head it can most likely perform a loop, and a roll. Even helicopters with a semi rigid underslung rotor such as that found on UH-1's and AH-1's have been looped. It's an energy maneuver that can be accomplished as long as their's sufficient altitude at the beginning of the maneuver and positive G is maintained throughout. The rotor system is huge gyroscope, if you unload it (negative G) it will not follow the aircraft through the maneuver properly and most likely contact the tail boom for a spectacular if not somewhat short lived termination of flight.

CH-47's can not loop. NO manned helicopter in the world today is capable of sustained inverted flight, it's impossible. Turbine powered aircraft (like the Lynx) have a governor that adjusts fuel flow to the engine(s) based on the amount of pitch being pulled and rotor RPM, it works more or less like an automatic transmission but it only controls fuel (power) to the engine. Secondly, the rotor blades are not configured to produce lift in the inverted position either by design or rigging. Sustained inverted flight would mean the aircraft could fly without loss of altitude inverted. Trust me, when your inverted in a helicopter you lose all kinds of altitude... really fast.

Even though many of the aircraft the army flies are more than capable of these maneuvers, they are not often seen for a number of good reasons. The first reason is that ALL army aircraft dash 10's (operators manual's) define the bank and pitch limitations as +/- 30 degree's pitch, +/- 60 degree's bank. You NEVER operate an aircraft beyond published limitations without serious repercussions that would most likely end your career. It's not coincidental that the these maneuvers are performed on the sly so to speak, rather than in public where your tail number can be grabbed by a camera. By coincidence, Army flight regs (AR 95-1) prohibit aerobatic maneuvers which are defined by the Army and the FAA (they have rules against aerobatics as well) as +/- 30 degree's pitch, +/- 60 degree's bank. Hmmmm, do you think the limitations in the -10 are coincidentally the same for every aircraft AND Army/FAA regs? Second reason, it's not practical and it's fairly dangerous for inexperienced pilots.

Welcome to the board Gremlin and nice post! Hope you can get some pictures up to Hood if you have any to show ;)

[flickme]

Ive seen a JollyGreen do a roll before. Its pretty impresive.

[Mikkel]

I'd give my firstborn son to see a CH-53 or a 47 do a roll..

I'm not gonna take up on that offer :D, but here (http://balsabusters.warp0.com/VIDEOS2.html) are some videos, in one of them you can see a CH-53 do a loop and a roll..

[szr]

I'd give my firstborn son to see a CH-53 or a 47 do a roll..

I'm not gonna take up on that offer :D, but here (http://balsabusters.warp0.com/VIDEOS2.html) are some videos, in one of them you can see a CH-53 do a loop and a roll..http://www.mcgirt.net/RC/VIDEOS/Discovery_Wings/dwings-h53.wmv

^That's f***ing nuts. Now, got any video of a 747 or a C-5 doing a roll? :lol:

[Beinlausen]

In the holy helms of Satan, that is friggin awsome!

[ValkXB70]

I used to have one of a 707 doing a barrell rol. Just to prove it was built tough.

http://www.707sim.com/images/texrole.jpg

http://www.avpics.de/mov/civ/tex_roll.avi

Found it

[usarfang]

http://rud.hjem.wanadoo.dk/skag/F16inverted.jpg

OMG THIS IS SUCH A PRETTY PICTURE!!!

[FozzieBear]

I used to have one of a 707 doing a barrell rol. Just to prove it was built tough.

http://www.707sim.com/images/texrole.jpg

http://www.avpics.de/mov/civ/tex_roll.avi

Found it HOLYCRAP!

[BusterHyman]

Whats the big deal. Aircraft don't know they are upside down. Including helicopters.

[Gremlin29]

Whats the big deal. Aircraft don't know they are upside down. Including helicopters.

Since aircraft (including helicopters) are incapable of concious thought, that's a forgone conclussion for most of us Mr. Obvious. :lol:

[Ratamacue]

Whats the big deal. Aircraft don't know they are upside down. Including helicopters.
If you knew anything about flight physics, you'd know that the shape of a wing is the main contributing factor to lift, and as such when a wing is inverted, its lift is inverted.

[J-10]

That's a rare pic of UH-60.

http://www.deltaweb.co.uk/eagles/shows/wadd0327.jpg
Lynx Loop
http://www.deltaweb.co.uk/eagles/wadd0302.htm

[Aerosoul]

Jeebus. I hadn't really seen anypics of inverted helos. Cool ****.

[M1A2U2]

id pay to see a C5 with fully loaded cargo do a barrel roll

[Malc]

I made a A380 do a barrel roll on Flight Simulator last night

[bloddyaxe]

Now I'd pay good money to see a Nimitz CVN do a loop...