A few nice Helicopter transmission images I found:
Marine Week Boston, 2010: Bell UH-1N Huey helicopter taking off from Boston Common, with the Bell AH-1W SuperCobra on the ground to the right, and the Sikorsky CH-53E Super Stallion to the left
Image by Chris Devers
Pasting from Wikipedia about the AH-1 SuperCobra helicopter:
• • • • •
The AH-1 Cobra (company designation: Bell 209) is a two-bladed, single engine attack helicopter manufactured by Bell. It shares a common engine, transmission and rotor system with the older UH-1 Iroquois. The AH-1 is also referred to as the HueyCobra or Snake.
The AH-1 was the backbone of the United States Army‘s attack helicopter fleet, but has been replaced by the AH-64 Apache in Army service. Upgraded versions continue to fly with the militaries of several other nations. The AH-1 twin engine versions remain in service with United States Marine Corps as the service’s primary attack helicopter. Surplus AH-1 helicopters have been converted for fighting forest fires. The United States Forest Service refers to their program as the Firewatch Cobra. Garlick Helicopters also converts surplus AH-1s for forest firefighting under the name, FireSnake.[2]
[…]
The Bell AH-1 SuperCobra is a twin-engine attack helicopter based on the US Army’s AH-1 Cobra. The twin Cobra family includes the AH-1J SeaCobra, the AH-1T Improved SeaCobra, and the AH-1W SuperCobra. The AH-1W is the backbone of the United States Marine Corps‘s attack helicopter fleet, but will be replaced in service by the AH-1Z Viper upgrade in the next decade.
*********
Pasting from Wikipedia about the Uh-1N Huey helicopter:
• • • • •
The UH-1 Iroquois is a military helicopter powered by a single, turboshaft engine, with a two-bladed main rotor and tail rotor. The helicopter was developed by Bell Helicopter to meet the United States Army‘s requirement for a medical evacuation and utility helicopter in 1952, and first flew on 20 October 1956. Ordered into production in March 1960, the UH-1 was the first turbine-powered helicopter to enter production for the United States military, and more than 16,000 have been produced worldwide.[1]
The first combat operation of the UH-1 was in the service of the U.S. Army during the Vietnam War. The original designation of HU-1 led to the helicopter’s nickname of Huey.[2] In September 1962, the designation was changed to UH-1, but Huey remained in common use, as well as being chosen as the official name by the United States Marine Corps. Approximately 7,000 UH-1 aircraft saw service in Vietnam.
[…]
In 1962, the Marines held a competition to choose an assault support helicopter to replace the Cessna O-1 fixed-wing aircraft and the Kaman OH-43D helicopter. The winner was the UH-1B, which was already in service with the Army. The helicopter was designated the UH-1E and modified to meet Marine requirements. The major changes included the use of all-aluminum construction for corrosion resistance,[footnote 3] radios compatible with Marine Corps ground frequencies, a rotor brake for shipboard use–to stop the rotor quickly on shutdown–and a roof-mounted rescue hoist.
The UH-1E was first flown on 7 October 1963, and deliveries commenced 21 February 1964, with 192 aircraft completed. Due to production line realities at Bell, the UH-1E was produced in two different versions, both with the same UH-1E designation. The first 34 built were essentially UH-1B airframes with the Lycoming T53-L-11 engine producing 1,100 shp (820 kW). When Bell switched production to the UH-1C, the UH-1E production benefited from the same changes. The Marine Corps later upgraded UH-1E engines to the Lycoming T53-L-13, which produced 1,400 shp (1,000 kW), after the Army introduced the UH-1M and upgraded their UH-1C helicopters to the same engine.
Pasting from Wikipedia about the Sikorsky CH-53E Super Stallion:
• • • • •
The Sikorsky CH-53E Super Stallion is the largest and heaviest helicopter in the United States military. It was developed from the CH-53 Sea Stallion, mainly by adding a third engine. Sailors and Marines commonly refer to the Super Stallion as the "Hurricane Maker" because of the downwash the helicopter generates. It was built by Sikorsky Aircraft for the United States Marine Corps. The less common MH-53E Sea Dragon fills the United States Navy‘s need for long range mine sweeping or Airborne Mine Countermeasures (AMCM) missions, and perform heavy-lift duties for the Navy. The CH-53E/MH-53E are designated "S-80" by Sikorsky.
Marine Week Boston, 2010: Bell UH-1N Huey and Bell AH-1W SuperCobra helicopters on Boston Common shortly before they took off
Image by Chris Devers
Pasting from Wikipedia about the AH-1 SuperCobra helicopter:
• • • • •
The AH-1 Cobra (company designation: Bell 209) is a two-bladed, single engine attack helicopter manufactured by Bell. It shares a common engine, transmission and rotor system with the older UH-1 Iroquois. The AH-1 is also referred to as the HueyCobra or Snake.
The AH-1 was the backbone of the United States Army‘s attack helicopter fleet, but has been replaced by the AH-64 Apache in Army service. Upgraded versions continue to fly with the militaries of several other nations. The AH-1 twin engine versions remain in service with United States Marine Corps as the service’s primary attack helicopter. Surplus AH-1 helicopters have been converted for fighting forest fires. The United States Forest Service refers to their program as the Firewatch Cobra. Garlick Helicopters also converts surplus AH-1s for forest firefighting under the name, FireSnake.[2]
[…]
The Bell AH-1 SuperCobra is a twin-engine attack helicopter based on the US Army’s AH-1 Cobra. The twin Cobra family includes the AH-1J SeaCobra, the AH-1T Improved SeaCobra, and the AH-1W SuperCobra. The AH-1W is the backbone of the United States Marine Corps‘s attack helicopter fleet, but will be replaced in service by the AH-1Z Viper upgrade in the next decade.
*********
Pasting from Wikipedia about the Uh-1N Huey helicopter:
• • • • •
The UH-1 Iroquois is a military helicopter powered by a single, turboshaft engine, with a two-bladed main rotor and tail rotor. The helicopter was developed by Bell Helicopter to meet the United States Army‘s requirement for a medical evacuation and utility helicopter in 1952, and first flew on 20 October 1956. Ordered into production in March 1960, the UH-1 was the first turbine-powered helicopter to enter production for the United States military, and more than 16,000 have been produced worldwide.[1]
The first combat operation of the UH-1 was in the service of the U.S. Army during the Vietnam War. The original designation of HU-1 led to the helicopter’s nickname of Huey.[2] In September 1962, the designation was changed to UH-1, but Huey remained in common use, as well as being chosen as the official name by the United States Marine Corps. Approximately 7,000 UH-1 aircraft saw service in Vietnam.
[…]
In 1962, the Marines held a competition to choose an assault support helicopter to replace the Cessna O-1 fixed-wing aircraft and the Kaman OH-43D helicopter. The winner was the UH-1B, which was already in service with the Army. The helicopter was designated the UH-1E and modified to meet Marine requirements. The major changes included the use of all-aluminum construction for corrosion resistance,[footnote 3] radios compatible with Marine Corps ground frequencies, a rotor brake for shipboard use–to stop the rotor quickly on shutdown–and a roof-mounted rescue hoist.
The UH-1E was first flown on 7 October 1963, and deliveries commenced 21 February 1964, with 192 aircraft completed. Due to production line realities at Bell, the UH-1E was produced in two different versions, both with the same UH-1E designation. The first 34 built were essentially UH-1B airframes with the Lycoming T53-L-11 engine producing 1,100 shp (820 kW). When Bell switched production to the UH-1C, the UH-1E production benefited from the same changes. The Marine Corps later upgraded UH-1E engines to the Lycoming T53-L-13, which produced 1,400 shp (1,000 kW), after the Army introduced the UH-1M and upgraded their UH-1C helicopters to the same engine.
