Marine One start up

[tartare]

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?

[Sikpilot]

Sounds like there is a rotor brake like in the S58 and S76

[John Eacott]

Standard Sea King start is with rotor brake on, both engines running before engaging rotors.

At least it used to be

[skadi]

Originally Posted by John Eacott

Standard Sea King start is with rotor brake on, both engines running before engaging rotors.

At least it used to be

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

[Sloppy Link]

Errrm....APU?

[212man]

Originally Posted by Sloppy Link

Errrm....APU?

Errmm....on a Sea King?

[Non-PC Plod]

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.

[John Eacott]

Originally Posted by skadi

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


Getting back to the OP, the engines can be running and the rotors held on the rotor brake.

[BTC8183]

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.

[skadi]

Originally Posted by BTC8183

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.

Ok, here it is from left side



skadi

[212man]

Originally Posted by BTC8183

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.

You learn something new every day!

[Carbon Bootprint]

Ok, here it is from left side

That would appear to be from the "other" left side, but thanks for the picture!

[Non-PC Plod]

Nah, that's the blow-dryer for his rug!

[Torquetalk]

Originally Posted by Non-PC Plod

Nah, that's the blow-dryer for his rug!

Is that a metaphor for his hair? Can imagine it comes in handy for some industrial scale daily hairdressing.

[skadi]

Originally Posted by Carbon Bootprint

That would appear to be from the "other" left side, but thanks for the picture!

Oh yes!

skadi

[Sloppy Link]

Originally Posted by 212man

Errmm....on a Sea King?

Errrm....feel free to acknowledge....

[MightyGem]

Hardly standard fit though.

[Thomas coupling]

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.

[krypton_john]

Originally Posted by Sloppy Link

Errrm....feel free to acknowledge....

Well, to be specific, you won't find it on an actual Sea King...

[krypton_john]

Originally Posted by Thomas coupling

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.

Presumably the Donald would not be aboard the test bed? So the baddies' chances are now 1 in 4!