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Marine One start up
I have noticed that when POTUS talks to reporters, or walks to the machine, the turbines often sound like they're running, but the blades are not yet turning.
Does the VH-3D have a ground idle setting which is used at this point - once he's on board then flight idle selected and blades begin to turn? |
Sounds like there is a rotor brake like in the S58 and S76
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Standard Sea King start is with rotor brake on, both engines running before engaging rotors.
At least it used to be ;) |
Originally Posted by John Eacott
(Post 10283398)
Standard Sea King start is with rotor brake on, both engines running before engaging rotors.
At least it used to be ;) skadi |
Errrm....APU? |
Originally Posted by Sloppy Link
(Post 10283434)
Errrm....APU? |
Not exactly a Sea King - I believe its known as an H3 across the pond. I think it has different engines, but I would imagine the same gearbox, including the accessory drive. As a maritime helicopter, the acc drive is part of the basic design to provide hydraulic power to fold/unfold the blades onboard ship.
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Originally Posted by skadi
(Post 10283411)
At least the Westland Kings have an AccessoryDrive ( actuated free wheeling unit ) so #1 could drive the hydraulics/generators without load on the rotorbrake...
skadi As do the Sikorsky Sea King/SH-3 :ok: Getting back to the OP, the engines can be running and the rotors held on the rotor brake. |
Apu!
Not often seen, as photos of the VH-3 tend to be of the LH side and main cabin door, but the RH MLG sponson has an APU attached to it.
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Originally Posted by BTC8183
(Post 10283601)
Not often seen, as photos of the VH-3 tend to be of the LH side and main cabin door, but the RH MLG sponson has an APU attached to it.
http://www.collectivemag.com/wp-cont...en-730x480.jpg skadi |
Originally Posted by BTC8183
(Post 10283601)
Not often seen, as photos of the VH-3 tend to be of the LH side and main cabin door, but the RH MLG sponson has an APU attached to it.
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Ok, here it is from left side |
Nah, that's the blow-dryer for his rug!
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Originally Posted by Non-PC Plod
(Post 10283834)
Nah, that's the blow-dryer for his rug!
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Originally Posted by Carbon Bootprint
(Post 10283822)
That would appear to be from the "other" left side, but thanks for the picture! :ok:
skadi |
Originally Posted by 212man
(Post 10283454)
Errmm....on a Sea King?
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Hardly standard fit though.
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Sikorsky H3. T-58 engines. Engine sits at Ground Idle in Acc drive. No clutch, no holding on rotor brake. Just sitting there at 51-58 Nf.
His helo is one of 5. They fly mostly everywhere as a 5 ship and swap postions frequently. This deters G2A missiles locking onto the one with the Protus onboard. The APU is a test bed being readied for the replacement programme for the presidents helicopter. |
Originally Posted by Sloppy Link
(Post 10283932)
Errrm....feel free to acknowledge.... |
Originally Posted by Thomas coupling
(Post 10283987)
Sikorsky H3. T-58 engines. Engine sits at Ground Idle in Acc drive. No clutch, no holding on rotor brake. Just sitting there at 51-58 Nf.
His helo is one of 5. They fly mostly everywhere as a 5 ship and swap postions frequently. This deters G2A missiles locking onto the one with the Protus onboard. The APU is a test bed being readied for the replacement programme for the presidents helicopter. |
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