HIGH PLANES Drifter ✓
@the_engi_nerd · joined 30 Aug 2013
Engineer. Dangerously sane. Creator of the phrase “vibes-based analysis”. In my Chinese Deterrence Era. https://t.co/6gkiD7lLGu
16 575Followers
975Following
41 771Posts total
1.8MViews on collected posts
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Sure, we all know you’re really like this https://t.co/gWkKXTvdJo
1.2K views · 34 likes
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F-35 was the most extensive flight test program in history. Twelve years. Thousands of tests and multiple sites. I have just realized that it was a historic opportunity. For a person like me who found test exhausting and intoxicating, F-35 was like that experiment where
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If only I could have 120+ AMRAAMs on a single jet. That would fix me
https://t.co/rfZWWQMoBw
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People have such faith in missile warning tech now that when a jet equipped with such a system is shot down, the reaction is “skill issue”
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@the_engi_nerd @planefag World’s averagest fighter pilot, by every conceivable metric.
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Working on a helicopter originally delivered when my parents were in elementary school:
https://t.co/82nRMlsVNz
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Being present for a V-22 demonstrating the fearsome power of its downwash:
https://t.co/dtrMEnaas0
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Launching rockets using MS DOS:
https://t.co/e1YgJb6gt0
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If you're new here and you're wondering who the heck I am and what I've done, here are some threads I've written about my experiences. First, the pain that was testing the original F-35C tailhook, and testing its redesign:
https://t.co/s9KvhZqQkr
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The flight test instrumentation systems used on F-35 test aircraft:
https://t.co/0al18Nb2QN
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@the_engi_nerd Awesome story! Reminds me that I lost a Hockey Puck award I was given while at Pax. Did the new arresting gear change the arresting wire as well?
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Let's put a bookend on the V-22 thread from the other day and tell the story of why I hated the NVH-3A test aircraft. 🧵
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On June 1, 2009, the VH-71 Presidential Helicopter program was terminated after years of delays and cost overruns. But we still needed a replacement for the NVH-3A as "Marine One".
Here's the story of how I learned that the V-22 wouldn't be that replacement. 🧵
📸 US Navy https:
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As I've just spent a while riffing on in the replies, being a telemetry engineer on the Sounding Rocket program was...an experience. Read the first few paragraphs of this article.
The scenario being described was literally my job during launch. https://t.co/aQG1zHIs3I
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F-35 Flight Test Instrumentation Thread 🧵 https://t.co/DEcwnyCFmd
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Though the program still needed to send the F-35C out to its final set of sea trials, those went very well, certainly without any further incidents like I've just described. Highly recommend "F-35 Lightning II: From Concept To Cockpit", chapter 13, for much more detail
END
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Fortunately it looks like the gear is good enough to support one more takeoff/landing cycle, so back to PAX it goes. The program decides to officially stop trying to chase the off-center arrrestments and wire only arrestments.
Thus ends the tailhook test saga...
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that I must conduct just on my flight test instrumentation hardware. Other maintainers and engineers have their own thick inspection stacks. It takes three days. We discover that we need new landing gear, but that can't happen at Lakehurst...
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Much consultation has to be done with the leaders of the program at Fort Worth. The day is late, the jet is impounded by the crew chief and no one is to work on it until formal inspection criteria are created. They arrive the next morning in my email, 200+ steps...
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It turns out that somehow the fresnel lens optical landing system (FLOLS) we are using was not set properly. Thus when the pilot thought he was flying on glideslope, he was flying a much too steep path. The LSO did not realize what was happening until it was too late.
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An immediate review of the data shows that the landing was at such a high sink rate that it is as if we have taken the F-35C and dropped it from a height of 20 feet. We hit almost entirely flat, just 2 degrees angle of attack.
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Fortunately, once we come back around for a conventional landing, there is no further difficulty. But now, the post-flight debrief we we have to talk about what happened and decide what to do next.
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...that we have violated a flight test continuation criterion: we hit so hard that all the landing gear bottomed out. The lead test engineer gets on the radio and says "We need a gentle flared landing." The pilot replies, "My body needs a gentle flared landing."
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Through the hotmic channel we have recording everything our pilot says and hears, I hear him yell "FUCK!" but he keeps control somehow and gets back in the air. "Lightning seven three is airborne, going back around" he says on the radio. Someone in the control room says...
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I don't hear that. And horrified, I watch on the video screen as the F-35 hits the ground with all three tires at once, then bounces off the runway, hits the runway again. The control room is full of engineers muttering curses under their breaths and staring at their screens.
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Everything seems normal at first. I hear our pilot call the ball. But then I see on the screen that he's actually coming in almost flat, and sinking like a stone. I expect to hear "WAVE OFF" from the fellow pilot monitoring him on the ground, acting as the Landing Signal Officer.
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An F-35C coming in for landing is usually at about 11 to 13 degrees nose high so that when it hits the carrier deck, it looks something like this: https://t.co/tsyIncw8aV
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I am sitting in something called the MITS (Mobile Instrumentation/Telemetry System). It's literally a giant 18 wheeler trailer the Navy made that's a mini control room. I am watching my instrumentation health screen and listening to the test audio, while watching the video
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We were doing tests with full external weapons (modulo not having AIM-9X on the outer wing stations...the wing structure needed a fix) and trying for off-center arrestments.
One cloudy day in May 2016 we try for an arrestment as far off centerline as we can go.
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Most of 2015 saw me paying more attention to instrumentation project efficiency (something that, I am pleasantly surprised to see, gets a 1 paragraph mention in "From Concept to Cockpit") but in 2016 I returned to Lakehurst with CF-03 to perform the trickiest tailhook tests
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Face aux comptes de taille comparable
5 posts des 90 derniers jours, à côté de la tranche de 10K–100K abonnés. diffusé bien au-delà de son propre public, et ce public réagit.
Vues médianes4 740ce compte924médiane pour 10K–100K
Portée, %28.60%ce compte3.62%médiane pour 10K–100K
Engagement, %3.49%ce compte1.52%médiane pour 10K–100K
| Indicateur | Ce compte | Médiane pour 10K–100K | Rapport |
|---|---|---|---|
| Vues médianes par post | 4 740 | 924 | 5.13× |
| Portée (vues ÷ abonnés) | 28.60% | 3.62% | 7.90× |
| Taux d'engagement | 3.49% | 1.52% | 2.30× |
Autres comptes de cette tranche → Comparer avec un autre compte → Comment ces repères sont établis →
Growth & engagement
How the posts we collected actually performed: views and reaction rate post by post, what the audience did with them, and where the follower count goes.
Views per post
4.8K5 Apr
394.4K27 Apr
34.2K29 Apr
1.6K17 Jun
2.6K8 Jul
181.4K
2.3K
3K
2.6K
4.7K16 Sep
6.7K17 Sep
2.3K
11.1K
1.2K
Last 14 collected posts, oldest on the left. The scale is logarithmic: one post can outrun the rest a hundred times over.
Engagement rate per post
0.83%5 Apr
0.42%27 Apr
0.41%29 Apr
0.38%17 Jun
0.85%8 Jul
0.21%
0.80%
0.72%
0.88%
0.89%16 Sep
5.68%17 Sep
3.49%
3.57%
2.91%
Reactions — likes, reposts, replies and quotes — divided by views. Median for 10K–100K accounts is 1.52%.
What the audience does
Likes82.0%5 889 in total
Reposts3.3%234 in total
Replies1.7%125 in total
Quotes0.6%40 in total
Bookmarks12.5%897 in total
Share of every reaction we collected for this account. Replies mean argument, reposts mean endorsement, bookmarks mean the post was worth keeping.
The follower curve appears once this account has two daily snapshots — we take one a day, and this one is on its first.
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