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Thread ID: 117893	2011-05-09 10:21:00	Helicopters	Poppa John (284)	PC World Chat

Post ID	Timestamp	Content	User
1200886	2011-05-09 21:20:00	no matter who is right or wrong, ya learn something new here each day and we discuss a huge range or topics......... good work peoples...:) and PJ yeah thats a noisy bugga, but the kids at work love it and we watch it nearly every time its in the air, keeps our fly boys happy here, cos we cant see a train from our spot............ :) beetle	beetle (243)
1200887	2011-05-09 22:40:00	PJ we could ask our son, he has had 23 years in the RNZAF, but even to us that would be "classified information". lol. Son put our 3 year grandson into the pilot's seat, helmet and all. Boy he could not stop talking about it when he got back to Christchurch. The February quake shook that out him !. Lurking.	Lurking (218)
1200888	2011-05-10 00:27:00	They used Chinooks they don't have a tail rotor as such. They have big rotors back and front and they do have a very distinct noise very different to normal helicopters. They sound like the rotors are fighting each other. So if they could cut this noise they would since only the West mainly America uses Chinooks The SEAL force uses MH60 Black Hawk helos. It was one of these that had a forced landing. The only Chinook used was the pick-up machine at the operation in Pakistan. The UH1 Huey and variants makes the noise known as 'Huey thump' because it has a rotor of only two blades. This was used for storage purpose as less space is occupied by each machine, especially on board ship.	Richard (739)
1200889	2011-05-10 01:02:00	The SEAL force uses MH60 Black Hawk helos. It was one of these that had a forced landing. The only Chinook used was the pick-up machine at the operation in Pakistan. The UH1 Huey and variants makes the noise known as 'Huey thump' because it has a rotor of only two blades. This was used for storage purpose as less space is occupied by each machine, especially on board ship. Not quite sure how you worked that than out the uhd/h blade dia is 48 ft. If you wanted a helicopter to stow onboard a ship you would want multiple blades so they would be shorter and smaller then you could fold them back. On a frigate sized ship you would need a hangar 48 feet long or a channel with which to stick the forward blade.	prefect (6291)
1200890	2011-05-10 01:39:00	Not quite sure how you worked that than out the uhd/h blade dia is 48 ft. If you wanted a helicopter to stow onboard a ship you would want multiple blades so they would be shorter and smaller then you could fold them back. On a frigate sized ship you would need a hangar 48 feet long or a channel with which to stick the forward blade. Remember Rich is getting on, so allow a little lee-way.	Cicero (40)
1200891	2011-05-10 02:11:00	I thought the thumping from the iriquois was because of the higher pressure air under the rotor hitting the boom and being chanelled forward	Whenu (9358)
1200892	2011-05-10 02:49:00	Prefect, Hueys are stored with the blades fore and aft, which means they occupy less space, than if they had 4 blades. Forty eight feet is not overly long for a hangar, but I think helos are more usually stowed side by side. on deck, aboard ships equipped to handle them. As well, the two blade rotor was what Bell was familiar with, and was fitted to the design from which the UH1 was developed.	Richard (739)
1200893	2011-05-10 02:55:00	In the 1 May 2011 operation that killed Osama bin Laden, it emerged that the 160th Special Operations Aviation Regiment, which operated the helicopters during the raid, used a heavily modified version of the UH-60. Features apparently include a modified tail section with extra blades on the tail rotor and other additions which significantly lower noise levels from that of conventional UH-60s. It also had low-observable technology similar to that of F-117 that enabled it to evade Pakistan Air Force radars. The aircraft seemed to include features like special high-tech materials, harsh angles, and flat surfaces, found only on sophisticated stealth jets. This came to light only when one of the helicopters used in the operation crashed and was subsequently destroyed except for its tail section.[16][17][Nb 1][18] Highly-modified H-60s were employed during the US Special Forces operation that resulted in the death of Osama bin Laden on 1 May 2011.[26][27][18] One such helicopter experienced mechanical trouble during the operation and the team was forced to destroy it before departing.[28] The team members later departed in one of two MH-47 Chinooks with bin Laden's remains. Two MH-47s were used for the mission to refuel the two MH-60s and as backups.[29][30] Thanks to good old Wikipedia.	Richard (739)
1200894	2011-05-10 03:45:00	Prefect, Hueys are stored with the blades fore and aft, which means they occupy less space, than if they had 4 blades. Forty eight feet is not overly long for a hangar, but I think helos are more usually stowed side by side. on deck, aboard ships equipped to handle them. As well, the two blade rotor was what Bell was familiar with, and was fitted to the design from which the UH1 was developed. The helicopters made for ships fold the blades backwards over the tail after the front blade pin is pulled out. I guess if you are talking non naval aviation helicopters side by side you are right.	prefect (6291)
1200895	2011-05-10 08:44:00	The Thump-Thump that comes with the Iroquois is due to its twin blade set-up,with the forward travel, its the leading blade that momentarily breaks the sound barrier with the thump being the mini sonic boom Yes, that should have been Ioquis not Appache. Sorry. PJ	Poppa John (284)
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