Go Back  PPRuNe Forums > Aircrew Forums > Rotorheads
Reload this Page >

Marine One start up

Rotorheads A haven for helicopter professionals to discuss the things that affect them

Marine One start up

Old 15th Oct 2018, 04:58
  #1 (permalink)  
Thread Starter
 
Join Date: Oct 2007
Location: A better place.
Posts: 1,558
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?
tartare is offline  
Old 15th Oct 2018, 05:10
  #2 (permalink)  
 
Join Date: Feb 2008
Location: Asia
Posts: 50
Sounds like there is a rotor brake like in the S58 and S76
Sikpilot is offline  
Old 15th Oct 2018, 05:39
  #3 (permalink)  
 
Join Date: Aug 1999
Location: Gold Coast, Australia
Age: 71
Posts: 4,085
Standard Sea King start is with rotor brake on, both engines running before engaging rotors.

At least it used to be
John Eacott is offline  
Old 15th Oct 2018, 06:21
  #4 (permalink)  
 
Join Date: Feb 2006
Location: On the big blue planet
Posts: 903
Originally Posted by John Eacott View Post
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
skadi is offline  
Old 15th Oct 2018, 06:47
  #5 (permalink)  
 
Join Date: Jan 2000
Location: Bar to Bar
Posts: 699
Errrm....APU?
Sloppy Link is offline  
Old 15th Oct 2018, 07:27
  #6 (permalink)  
 
Join Date: Oct 1999
Location: Nigeria
Age: 52
Posts: 4,443
Originally Posted by Sloppy Link View Post
Errrm....APU?
Errmm....on a Sea King?
212man is offline  
Old 15th Oct 2018, 08:14
  #7 (permalink)  
 
Join Date: Feb 2005
Location: On the green bit near the blue wobbly stuff
Posts: 597
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.
Non-PC Plod is offline  
Old 15th Oct 2018, 08:15
  #8 (permalink)  
 
Join Date: Aug 1999
Location: Gold Coast, Australia
Age: 71
Posts: 4,085
Originally Posted by skadi View Post
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.
John Eacott is offline  
Old 15th Oct 2018, 10:37
  #9 (permalink)  
 
Join Date: Sep 2012
Location: South
Age: 57
Posts: 34
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.
BTC8183 is offline  
Old 15th Oct 2018, 11:00
  #10 (permalink)  
 
Join Date: Feb 2006
Location: On the big blue planet
Posts: 903
Originally Posted by BTC8183 View Post
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
skadi is offline  
Old 15th Oct 2018, 12:41
  #11 (permalink)  
 
Join Date: Oct 1999
Location: Nigeria
Age: 52
Posts: 4,443
Originally Posted by BTC8183 View Post
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!
212man is offline  
Old 15th Oct 2018, 15:41
  #12 (permalink)  
 
Join Date: Nov 2007
Location: Texas, like a whole other country
Posts: 422
Ok, here it is from left side
That would appear to be from the "other" left side, but thanks for the picture!
Carbon Bootprint is offline  
Old 15th Oct 2018, 15:54
  #13 (permalink)  
 
Join Date: Feb 2005
Location: On the green bit near the blue wobbly stuff
Posts: 597
Nah, that's the blow-dryer for his rug!
Non-PC Plod is offline  
Old 15th Oct 2018, 16:06
  #14 (permalink)  
 
Join Date: Jan 2006
Location: EU
Posts: 365
Originally Posted by Non-PC Plod View Post
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.
Torquetalk is offline  
Old 15th Oct 2018, 16:08
  #15 (permalink)  
 
Join Date: Feb 2006
Location: On the big blue planet
Posts: 903
Originally Posted by Carbon Bootprint View Post
That would appear to be from the "other" left side, but thanks for the picture!
Oh yes!

skadi
skadi is offline  
Old 15th Oct 2018, 18:32
  #16 (permalink)  
 
Join Date: Jan 2000
Location: Bar to Bar
Posts: 699
Originally Posted by 212man View Post
Errmm....on a Sea King?
Errrm....feel free to acknowledge....
Sloppy Link is offline  
Old 15th Oct 2018, 19:16
  #17 (permalink)  
 
Join Date: Jul 1999
Location: Warrington, UK
Posts: 3,346
Hardly standard fit though.
MightyGem is offline  
Old 15th Oct 2018, 19:24
  #18 (permalink)  
 
Join Date: Aug 2000
Location: UK
Posts: 3,660
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.
Thomas coupling is offline  
Old 15th Oct 2018, 20:02
  #19 (permalink)  
 
Join Date: Jul 2008
Location: New Zealand
Posts: 885
Originally Posted by Sloppy Link View Post

Errrm....feel free to acknowledge....
Well, to be specific, you won't find it on an actual Sea King...
krypton_john is offline  
Old 15th Oct 2018, 20:04
  #20 (permalink)  
 
Join Date: Jul 2008
Location: New Zealand
Posts: 885
Originally Posted by Thomas coupling View Post
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!
krypton_john is offline  

Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.