F-35 and Airshows

Discuss the F-35 Lightning II
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spazsinbad

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Unread post31 Jul 2020, 20:31

F-35 Demonstration Maneuvers Explained: The Pedal Turn https://www.youtube.com/watch?v=e3zRW12BI_s

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Unread post01 Aug 2020, 06:53

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Unread post20 Aug 2020, 16:31

The LIGHTING cracks it again - or should I say 'apparently VAPORISES' it somewhat. But hey this is getting OLD - LIGHTING?
United States Air Force Flight Demonstration Teams “Vaporize” Ocean City Air Show
19 Aug 2020 Randy Jennings

"The “OC Air Show” was a stunning success for those starved of air show entertainment. It was also the first time four Air Force demonstration teams took part in the same show

Taking place over the beaches of Ocean City, Maryland, a resort town on the Atlantic coast of the United States, the Ocean City Air Show was held on August 15-16, 2020. Originally the OC Air Show was scheduled for June, but COVID-19 caused it to be postponed until this past weekend.

The show was highlighted by not only the United States Air Force Thunderbirds, but also the A-10C Thunderbolt II, F-22A Raptor, and F-35A Lighting II flight demonstration teams. Before the air show’s postponement, only the Thunderbirds were scheduled to perform at the OC Air Show...."

PHOTO: https://i1.wp.com/theaviationist.com/wp ... HOW_11.jpg

Source: https://theaviationist.com/2020/08/19/u ... -air-show/
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Unread post21 Aug 2020, 17:28

Watched all the displays... the F-22 and 35 are on a different level, no question. And the F-35 display was VERY impressive, especially the power it displayed in the vertical. Damned if the F-22 didn't steal the show though IMO. The way it dances in the air, is just majestic.

I'd still like to see and F-22 chased by an F-35. Maneuver for maneuver, would tell us a lot.. like just how close it is!
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Unread post25 Aug 2020, 12:53

Capt. Kristin "BEO" Wolfe, F-35 Demo pilot, explains the Square Loop maneuver. https://www.youtube.com/watch?v=pk0K-10nquU

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Unread post09 Sep 2020, 22:14

OCEAN CITY AIRSHOW HIGHLIGHTS F-35 Demo Team 2020 https://www.youtube.com/watch?v=dE1uzJJQuIw

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Unread post02 Dec 2020, 16:57

Captain Kristin "BEO" Wolfe says the Minimum Radius Turn is completed in 15 seconds. (!?!?) :shock: wow! really !? :doh:
https://www.youtube.com/watch?v=59rS-iI-aYY

F-35 Demonstration Maneuvers Explained: Min Radius Turn to Lightning Loop
08/03/2020
hey everyone, captain kristen beowulf the f-35 demo pilot.
today we're going to be talking about the min radius turn to lightning loop.
the minimum radius turn is exactly what it sounds.
it's intended to show how quickly the jet can turn.
and to show how small of a turn radius is required to complete the 360 degree level turn.

Entering just over 400 knots the jet finishes the turn in about 15 seconds.

and then i immediately pull the nose to pure vertical for the lightning loop maneuver, at just over 3000 feet above ground.
i pull full aft on the stick to command maximum nose rotation over the top and show how quickly the jet can point its nose using the high aoa capability.
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Unread post02 Dec 2020, 16:58

Rare Shot trying to avoid the Birds!! :shock: wow (Rares Shot) Amazing Handling Skills...!! :applause:
https://www.youtube.com/watch?v=nGxKlXTab74
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Unread post02 Dec 2020, 17:06

Drift of F-35 does not lower the Nose. 8) How about the Drift of other Fighter JETs? :devil:
https://www.youtube.com/watch?v=WW0Q4PBAzaM

hey everyone. captain kristen beowulf, the f-35 demo pilot.
today, we'll be talking about the tactical pitch.
one of the more unique maneuvers we do during the routine is the tactical pitch, or informally known as the dojo drift.
named after the first f-35 demo pilot who created and flew the maneuver last season.
approaching the crowd at 310 knots and 300 feet above ground, i select max afterburner, roll to 45 degrees angle of bank and pull full app on a stick.
this commands maximum aoa, or angle of attack, from the jet, which means the jet's flight path is sliding away from the crowd as the nose is still pointed upwards.
i reduce the aoa around 150 knots and show the jets ability to climb, even after bleeding off tons of energy.
it's always a really fun last maneuver to end the show with right before coming in for landing.
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Unread post02 Dec 2020, 17:09

@1:12~ F-35's Quick Nose Pointing Speed !! :shock: WoW. @2:05~The speed stands out when viewed compared to the F-16. 8)
https://www.youtube.com/watch?v=CxgtoOVTgDY
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Unread post02 Dec 2020, 17:10

C model 2020 Air Show. 8)
https://www.youtube.com/watch?v=Ui-7r8NaVUQ
@00:45~ High Rate Climb.
@02:30~ Quite Instantaneous Turns.
@03:15~ High Rate Climb.
@03:50~ Minimum Radius Turns of 20 seconds Just.
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Unread post02 Dec 2020, 17:15

CincoHamilton talks about the F-35's Tail Slide. 8)
He says it's a Typically Prohibited Maneuver. I was... secretly... hoping to see it on an Air Show someday...:doh: (Lose Heart)
https://www.instagram.com/p/CE5ONqHhOPx/
F-35 Tail Slide.gif

[cincohamilton] : This is what we call a tailslide. Typically a prohibited maneuver but as test pilots we use it to ensure the aircraft is recoverable if it happens. You fly straight up until you run out of airspeed and then hope, as the aircraft falls, that the nose points down and stays down...allowing the pilot to regain control and fly away. They are a blast to fly, though slightly nauseating.

Q:What’s the average flight level/altitude that you run out? I would have to assume it’s in the 40’s-50’s right ? Higher?
A [cincohamilton] : depends on where you start. We would do this testing in the 30s to see aircraft responses with low dynamic pressure.

Q1: I'm surprised that doesn't cause a compressor stall!
Q2: I have the same question, I'm curious how the engine maintains airflow
A [cincohamilton] : the engine can suck in a lot of air...so that along with a very effective fuel management computer keeps the engine safe. It’s a very good engine, I’d argue the most reliable ever made for a fighter...maybe Pratt should pay me for that free advertisement

Q: Does the vectoring nozzle help you to recover? What about elevator movements? Because if the tailslide is quite fast, that elevator movements may induce pith moment.
A [cincohamilton] : so the F-35 does not have thrust vectoring. If it did that could help recover the aircraft if it went out of control. The stabilator’s definitely play the most important part in regaining control. The pilot goes hands off during the recovery while the computer controls the surfaces to ensure recovery.
Q: Thank you Sir, I so the nozzle only changes direction upon landing, ? It is totally fixed during flight,?
A [cincohamilton] : the nozzle swings down on the B-Model and only when going into hover mode. The F-22 Raptor has thrust vectoring.

Q: So do you just pull up and then essentially let go of the stick? Then let it fly itself into a dive spin?
A [cincohamilton] : yeah, fly it straight up and then as it falls off release the stick, full the engine out of afterburner and the aircraft takes over from there to recover to aircraft to a nose down attitude. Once the nose is down and stays down the pilot can fly away as the airspeed builds.

Q: So if it doesn’t fall nose forward, what happens then?!
A [cincohamilton] : it tumbles...but then recovered once it reaches higher dynamic pressure. If there’s a possibility it won’t recover, based on engineering predictions, we put a spin chute on the plane as a safety measure.

Q: Can you glide the jet by the acceleration through going down or you need to turn on the jet engines to keep it going straight? I mean compared to light and ultralight aircrafts which you can glide without running engine, is that possible to steer the jet until landing time with engines off ?
A [cincohamilton] : yes, we do practice engine flameout approaches and landings. It can glide, but it requires a steep approach.

Q: What are the g’s pulling out of that?
A [cincohamilton] : the g’s aren’t bad since the airspeed is slow. You get jostled around quite a bit though as the aircraft tumbles slightly.

Q: So what do you do if the nose doesn’t point down?
A [cincohamilton] : if the aircraft continues to tumble then you wait so see if it recovers as the air gets thicker, I.e., continue to descend and see if it recovers. During some of these missions if there is a risk that it won’t recover we install a spin chute near the tail of the aircraft. If you get to a certain altitude you can pop that chute and it will force the nose down. Once the nose is pointed down the chute separates and the pilot flies away. If all else fails you eject.

Q: What altitude is this maneuver performed at?
A [cincohamilton] : usually in the 30s. We want to be high enough to get the right dynamic pressure and give us room to recover.
Q: awsome thanks for responding. So in other words not to high that the air is not thin enough for good lift. But not to low that that you can't recover?
A [cincohamilton] : bingo!


In addition,
CincoHamilton seems to like C the most among ABC. 8)
https://www.instagram.com/p/CGxfCZphnwK/
Q: nice thanks! Follow up; what’s your favorite since you’ve flown all 3?
A [cincohamilton] : I liked the C variant the most. Smoother, better high AoA handling, more fuel, easiest to land.

The fuel difference between A and C is only 1,500 lb, but is there such a difference in range that he had to comment and note? :roll:
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Unread post03 Dec 2020, 16:46

doge wrote:Captain Kristin "BEO" Wolfe says the Minimum Radius Turn is completed in 15 seconds. (!?!?) :shock: wow! really !? :doh:
https://www.youtube.com/watch?v=59rS-iI-aYY

F-35 Demonstration Maneuvers Explained: Min Radius Turn to Lightning Loop
08/03/2020
hey everyone, captain kristen beowulf the f-35 demo pilot.
today we're going to be talking about the min radius turn to lightning loop.
the minimum radius turn is exactly what it sounds.
it's intended to show how quickly the jet can turn.
and to show how small of a turn radius is required to complete the 360 degree level turn.

Entering just over 400 knots the jet finishes the turn in about 15 seconds.

and then i immediately pull the nose to pure vertical for the lightning loop maneuver, at just over 3000 feet above ground.
i pull full aft on the stick to command maximum nose rotation over the top and show how quickly the jet can point its nose using the high aoa capability.


The F-35 is limiting thrust output to avoid accelerating at 380knots when pulling 7.5G turn:
viewtopic.php?f=22&t=57359
This means what we saw at the airshow is below the actual limit of the aircraft.

If you do the math that is near 21.5deg/sec turn rate, which is equivalent to 16s 360 turn.
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Unread post03 Dec 2020, 16:51

About tailslide:

https://www.youtube.com/watch?v=J2Be50SNlSQ
https://www.youtube.com/watch?v=w87AvnDiVBU
Some non thrust-vectored jets can do tail slide. Normally it cannot level nose up immediately after the maneuver, because low airspeed does not generate sufficient pitch moment. Their aerodynamic control surfaces require enough airflow to be effective. They need to dive long time, in order to get sufficient speed to pull the nose up.

However, the F-35 may be different:
https://youtu.be/aWji8AcOYGA
Image
At 0:10 s F-35 does a tail slide. It starts with almost zero airspeed, and it levels its nose immediately. The pitch authority is exceptional. It seems that it could generate enough pitch moment even at low airspeed. Its aerodynamics surfaces are highly effective.
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