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tpodz
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 Posted: Aug 11, 2011 - 07:11 PM
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Newbie
Joined: Aug 11, 2011 - 07:00 PM
Posts: 3
Status: Offline
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Hi there. I have a few queries that i hope bros here are able to enlighten me. 
1) During our launch for the F16, why do we throttle up when we see the FFP light flickers? (6 Green Light at the LOX panel). How does throttling up helps?
2) How does the Hydraulic Pump A & B works? Was told it was using a swashplate? Something like a Constant pressure Variable Flow pump?
Hope to hear from u guys soon. Thanks! |
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Sponsor
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 Posted: May 25, 2013 - 4:58 AM
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F-16.net Sponsor
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That_Engine_Guy
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Posted: Aug 12, 2011 - 12:41 AM
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Elite 2K
Joined: Dec 14, 2005 - 05:03 AM
Posts: 2198
Location: Under the engine somewhere.
Status: Offline
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tpodz wrote:
1) During our launch for the F16, why do we throttle up when we see the FFP light flickers? (6 Green Light at the LOX panel). How does throttling up helps?
Throttling up changes the conditions of the pump's output. By increasing the demand from the engine both flow and pressure will change. The book says the light can flicker at "IDLE" but if you increase the throttle, and the light continues to blink, or goes completely out, there can be a problem.
tpodz wrote:
2) How does the Hydraulic Pump A & B works? Was told it was using a swashplate? Something like a Constant pressure Variable Flow pump?
Yes, it's a Variable Flow, Constant Pressure system. As there is an increase in demand for flow, the swashplate will pivot, allowing the pistons attached to have a longer stroke. As flow decreases the plate moves back towards neutral where the pistons have a short stroke. (See illustration & Link)
http://www.youtube.com/watch?v=Athbk7JvGRQ
Keep 'em flyin' 
TEG |
| Description: |
| An example of the flow inside a variable flow, constant pressure hyd pump |
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23.97 KB |
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10434 Time(s) |
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_________________
[Airplanes are] near perfect, all they lack is the ability to forgive.
— Richard Collins
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tpodz
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Posted: Aug 14, 2011 - 12:52 PM
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Newbie
Joined: Aug 11, 2011 - 07:00 PM
Posts: 3
Status: Offline
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That_Engine_Guy wrote:
tpodz wrote:
1) During our launch for the F16, why do we throttle up when we see the FFP light flickers? (6 Green Light at the LOX panel). How does throttling up helps?
Throttling up changes the conditions of the pump's output. By increasing the demand from the engine both flow and pressure will change. The book says the light can flicker at "IDLE" but if you increase the throttle, and the light continues to blink, or goes completely out, there can be a problem.
Hmm it would help in if any of u guys could explain the "how" and "why" we increase throttle. In terms of system wise? Wat will change if we change throttle settings etc?
Thanks! |
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That_Engine_Guy
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Posted: Aug 14, 2011 - 11:32 PM
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Elite 2K
Joined: Dec 14, 2005 - 05:03 AM
Posts: 2198
Location: Under the engine somewhere.
Status: Offline
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tpodz wrote:
Hmm it would help in if any of u guys could explain the "how" and "why" we increase throttle. In terms of system wise? Wat will change if we change throttle settings etc?
System wise; I'd suggest you refer to the applicable Fuel System FI and GS.
TEG |
_________________
[Airplanes are] near perfect, all they lack is the ability to forgive.
— Richard Collins
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tpodz
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Posted: Aug 16, 2011 - 09:49 PM
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Newbie
Joined: Aug 11, 2011 - 07:00 PM
Posts: 3
Status: Offline
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i went thru the GS and couldnt find any explanation for it 
Went thru the FI it only tells us to throttle up. |
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Cali
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Posted: Aug 17, 2011 - 02:05 AM
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Enthusiast
Joined: Apr 30, 2008 - 07:52 PM
Posts: 50
Status: Offline
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| That engine guy explained it pretty well. |
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