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F-35 news roundup


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Going off on a bit of a tangent, The Smithsonian Channel has a show about the HMS Queen Elizabeth airing now:

 

https://www.smithsonianchannel.com/shows/rise-of-the-supercarrier/1006072

 

I have only seen bits of a couple of episodes, and no F-35s yet, but I am hoping they will show up.  They did have a segment about the deck handlers, and they had non-operational Harriers and an F-35 mock-up.

 

Thanks for the heads up. They're still running the episodes. Decided to record them. Looks interesting.

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On 10/23/2019 at 8:41 AM, ST0RM said:

Interesting how the tail stabs are left in the full up position, while the aircraft are shut down on deck. 

Cuts down on overall length?

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On 10/23/2019 at 7:41 AM, ST0RM said:

Interesting how the tail stabs are left in the full up position, while the aircraft are shut down on deck. 

 
Well they aren’t “bleeding down” as all the control surface actuators are electric. 

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21 minutes ago, habu2 said:

 
Well they aren’t “bleeding down” as all the control surface actuators are electric. 

That will happen when they connect the static discharge lines to it. All the electricity will drain out.

 

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6 hours ago, MarkW said:

That will happen when they connect the static discharge lines to it. All the electricity will drain out.

 


well that explains the lightning bolt on the tail...... 😉

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https://mobile.twitter.com/thef35/status/1211712139242684417

 

 

FORT WORTH, Texas, Dec. 30, 2019 /PRNewswire/ -- Lockheed Martin (NYSE: LMT) delivered the 134th F-35 aircraft for the year today, exceeding the joint government and industry 2019 delivery goal of 131 aircraft.
One hundred and thirty-four deliveries represent a 47% increase from 2018 and nearly a 200 percent production increase from 2016. Next year, Lockheed Martin plans to deliver 141 F-35s and is prepared to increase production volume year-over-year to hit peak production in 2023

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On 11/14/2019 at 5:26 PM, habu2 said:

 
Well they aren’t “bleeding down” as all the control surface actuators are electric. 

Not to be argumentative, but the actuators aren't electric.  Parker Aerospace makes the actuators for the tail control surfaces.  The division I work in Kalamazoo, MI at makes the hydraulic pumps that are a part of the actuator system.  Here is text from Parker's brochure:

 

Electrohydrostatic actuation (EHA) and electric backup hydraulic actuation (EBHA) are power-by-wire systems that deliver less system weight, enhanced avionics integration, and reduced lifecycle costs. EHAs and EBHAs are self-contained hydraulic systems controlled by high-power electronics which allow the use of traditional, proven hydraulic actuation configurations for fault tolerance. The product of two decades of research, development, and flight-tested reliability, Parker EHAs and EBHAs offer significant advantages: • Reduced system weight. Hydraulic distribution systems are reduced. • Reduced power consumption. Power is used as required, yielding a more efficient system. • Improved maintainability. Hydraulic disconnections between actuation equipment and the vehicle system are eliminated. F-35 horizontal tail electrohydrostatic actuator.

 

https://www.parker.com/literature/Control Systems Division/CSD literature/CSDBrochure.pdf

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To be more specific the control surfaces are driven by self contained EHA units - electric motors in each EHA pump hydraulic fluid into linear actuators to move control surfaces.  I worked PTMS/C on F-35 (back during AA-1 flight test) and at that time there was concern about the amount of electrical power required to drive the EHAs on the larger control surfaces of the C models.  (obviously that has now been resolved)

 

There are traditional hydraulic circuits on other parts of the aircraft, IIRC they operate at ~4000 psi.

 

The original comment (all the electricity will drain out) was tongue in cheek though....

 

.

Edited by habu2
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19 minutes ago, habu2 said:

To be more specific the control surfaces are driven by self contained EHA units - electric motors in each EHA pump hydraulic fluid into linear actuators to move control surfaces.  I worked PTMS/C on F-35 (back during AA-1 flight test) and at that time there was concern about the amount of electrical power required to drive the EHAs on the larger control surfaces of the C models.  (obviously that has now been resolved now)

 

There are traditional hydraulic circuits on other parts of the aircraft, IIRC they operate at ~4000 psi.

 

The original comment (all the electricity will drain out) was tongue in cheek though....

I thought you meant it tongue in cheek, but there is an effort to go fully electrical on control surfaces of aircraft so I wanted to make sure no one mis-interpreted the pun. And...yes.  We also make the actuators on all three models (they are different) so the C problems must have been corrected.

Edited by fasteagle12
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