Search found 967 matches

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by akiss20
Sat Jul 08, 2023 11:39 am
Forum: Technical/Operations
Topic: Flight turbulence increasing as planet warms up
Replies: 35
Views: 5334

Re: Flight turbulence increasing as planet warm

[twoid][/twoid] I’m not paying to read but, having lots of experience with wildly inaccurate turbulence forecasts, I’d like to know how they quantified turbulence 45 years ago when we’re talking about 0.1% of the annual exposure to severe turbulence and maybe 0.3% of lesser turbulence, severe is a v...

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by akiss20
Tue Apr 11, 2023 12:27 am
Forum: Non-Aviation
Topic: federal judge suspends FDA's longtime approval of an abortion pill
Replies: 42
Views: 4325

Re: federal judge suspends FDA's longtime approval of an abortion pill

As an avid United flyer I always refuse to connect through IAH as it is too extreme there. They even play evangalist preachers on Sundays there on the airport TVs. IAH is among the most liberal corners of Texas. Consider yourself lucky if hanging out there. Like saying “count yourself lucky, you’re...

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by akiss20
Sat Jan 07, 2023 4:21 pm
Forum: Non-Aviation
Topic: 2023 F1 Season News and Discussion Thread
Replies: 668
Views: 59471

Re: 2023 F1 Season News and Discussion Thread

I know it won’t happen but wish they would just buy haas. Haas hasn’t done really anything of interest except for a few moments and it isn’t really a feeder team for much a la Williams (to Merc sometimes) and Alfa (to Ferrari). I know Haas just signed a new sponsorship with MoneyGram but whatever. I...

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by akiss20
Sat Dec 31, 2022 3:12 pm
Forum: Non-Aviation
Topic: Pope Emeritus, Benedict XVI, RIP
Replies: 21
Views: 2163

Re: Pope Emeritus, Benedict XVI, RIP

Protector of pedophiles and gaslighter of victims, demonizer of LGBT+ individuals, promoter of HIV by restricting condom use, and former Nazi. Why should anyone shed a tear for this guy?

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by akiss20
Fri Nov 19, 2021 1:17 am
Forum: Non-Aviation
Topic: F1 - 2021 Season
Replies: 1121
Views: 81703

Re: F1 - 2021 Season

The meeting was scheduled for 17:00 local time (which was 14:00 GMT). So just over four hours ago. I'm surprised we haven't heard anything yet. I'm expecting the review to be granted, but no penalty for Verstappen. We'll have to wait until tomorrow to find out what's happening... https://www.racefa...

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by akiss20
Fri Nov 19, 2021 1:16 am
Forum: Non-Aviation
Topic: F1 - 2021 Season
Replies: 1121
Views: 81703

Re: F1 - 2021 Season

The meeting was scheduled for 17:00 local time (which was 14:00 GMT). So just over four hours ago. I'm surprised we haven't heard anything yet. I'm expecting the review to be granted, but no penalty for Verstappen. We'll have to wait until tomorrow to find out what's happening... https://www.racefa...

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by akiss20
Mon Sep 27, 2021 1:08 am
Forum: Non-Aviation
Topic: F1 - 2021 Season
Replies: 1121
Views: 81703

Re: F1 - 2021 Season

The new FIA directive on pit stops really is causing havoc. We had what 6-7 slow stops today? Such utter nonsense.

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by akiss20
Sun Jun 27, 2021 8:52 pm
Forum: Non-Aviation
Topic: F1 - 2021 Season
Replies: 1121
Views: 81703

Re: F1 - 2021 Season

Man George cannot catch a break! He has the worst luck in the world.

Shame it didn't last a few more laps, would've been great to see Perez try and pass Bottas. Good showing from RB overall. Solid comeback for Ferrari.

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by akiss20
Fri Jun 11, 2021 10:57 am
Forum: Non-Aviation
Topic: F1 - 2021 Season
Replies: 1121
Views: 81703

Re: F1 - 2021 Season

All those comments about "angry" Max are hilarious. He's a sportsman and very is commited to become a F1 World Champion. And he is showing us his dissapointment vividly. But I also understand that it's too much for some snowflakes.... Lewis swears on team radio maybe once a season. Sebast...

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by akiss20
Tue Apr 20, 2021 5:46 pm
Forum: Non-Aviation
Topic: F1 - 2021 Season
Replies: 1121
Views: 81703

Re: F1 - 2021 Season

I'm critical of Russell but I agree that Toto's statement is BS. In fact Russell not attempting the pass would be worse for him, for Williams and for Mercedes. The trick was not to crash, or to abort the pass when it proved difficult. Exactly, Russell took the risk for the overtake and took himself...

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by akiss20
Tue Apr 20, 2021 3:02 pm
Forum: Non-Aviation
Topic: F1 - 2021 Season
Replies: 1121
Views: 81703

Re: F1 - 2021 Season

I mean give the guy a second, he's had two races in the car to Lando's 2 years, and it's not like Lando is just some talentless pay driver; he has skills and is very driven to improve himself (you can hear on the radio whenever he messes up how high a standard he holds himself to, even when his eng...

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by akiss20
Tue Apr 20, 2021 2:42 pm
Forum: Non-Aviation
Topic: F1 - 2021 Season
Replies: 1121
Views: 81703

Re: F1 - 2021 Season

I only got to see the start and the first 20 lops or so, luckily f1 posts race highlights soon after. Questions remain about Riccardo and how good he is. He should be the number one at Mclaren and competing with/outperforming Norris but two races in he is looking like he is where he will be for the...

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by akiss20
Tue Apr 20, 2021 1:42 pm
Forum: Non-Aviation
Topic: F1 - 2021 Season
Replies: 1121
Views: 81703

Re: F1 - 2021 Season

I thought Wolff's statement about George was pretty BS. "The whole situation should have never happened. Valtteri had a bad first 30 laps and should have never been in that position, but George should never have launched into this manoeuvre considering that the track was drying up -- it meant t...

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by akiss20
Mon Apr 19, 2021 2:14 pm
Forum: Non-Aviation
Topic: F1 - 2021 Season
Replies: 1121
Views: 81703

Re: F1 - 2021 Season

Yeah the camera angles were not ideal for a lot of the circuit, not helped by the cams often being aimed the wrong way to catch anything either. The only helpful angle of the Bottas Russell crash was the Onboard from Kimi and even that wasn't as clear as I'd like to see, it seemed to my eyes that B...

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by akiss20
Sun Apr 18, 2021 3:05 am
Forum: Non-Aviation
Topic: Opinion about elite universities like Caltech and MIT eliminating SAT admission test due to COVID?
Replies: 35
Views: 2431

Re: Opinion about elite universities like Caltech and MIT eliminating SAT admission test due to COVID?

You're right; the tests used to have lots of tricks in them. But any test of aptitude has tricks and tests of logic. You say SAT is not an accurate single point predictor of aptitude. My reading said it 88% correlated with IQ, at least prior to 2016 redesign, which was partly to make it less "...

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by akiss20
Sun Apr 18, 2021 2:38 am
Forum: Non-Aviation
Topic: Opinion about elite universities like Caltech and MIT eliminating SAT admission test due to COVID?
Replies: 35
Views: 2431

Re: Opinion about elite universities like Caltech and MIT eliminating SAT admission test due to COVID?

The SAT or GRE test Aptitude. As I said, you need that plus character (GPA is a decent proxy for that) to succeed at these top levels. The idea you can get through Caltech without enough aptitude, yeesh. I wouldn’t want to try that. They would need to make it easier. Nobody is suggesting one doesn’...

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by akiss20
Sat Apr 17, 2021 10:53 pm
Forum: Non-Aviation
Topic: Opinion about elite universities like Caltech and MIT eliminating SAT admission test due to COVID?
Replies: 35
Views: 2431

Re: Opinion about elite universities like Caltech and MIT eliminating SAT admission test due to COVID?

The Problem with the SAT and ACT is that there are ways to game it by teaching for the test, rather than teaching on broad knowledge and application. The Advanced Math is there to trick folks, and the Advanced Language skills are so focused that they barely have application anywhere else. I could h...

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by akiss20
Mon Mar 29, 2021 2:07 pm
Forum: Non-Aviation
Topic: F1 - 2021 Season
Replies: 1121
Views: 81703

Re: F1 - 2021 Season

Wish the stewards would make up their mind on track limits though. 40 laps of going wide at T4 to shave off time isn't an advantage but finishing up a pass is? Enforce it or don't but don't change the enforcement mid-race. One part was definitely confusing - exceeding track limits in practice or qu...

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by akiss20
Sun Mar 28, 2021 10:17 pm
Forum: Non-Aviation
Topic: F1 - 2021 Season
Replies: 1121
Views: 81703

Re: F1 - 2021 Season

Fun race. Fitting start for Mazepin. Crofty didn't even have to check if it was Schumacher or Mazepin who spun (granted Mick spun a few laps later). Only 1 weekend in and he's already rightly become persona non-grata (especially after breaking the gentlemen's agreement and then destroying a few peop...

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by akiss20
Wed Aug 12, 2020 4:09 pm
Forum: Technical/Operations
Topic: 737CL engine sound
Replies: 5
Views: 1952

Re: 737CL engine sound

Also, that’s some pretty creepy wing flex at 1:35 in the video (likely an artifact of filming with a cell phone camera and the way in which phones capture an image) You can see that the entire frame seems to distort around those times (i.e. it's not just the wing doing some distortion). My guess is...

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by akiss20
Tue Aug 04, 2020 5:41 pm
Forum: Non-Aviation
Topic: It's back! F1 2020 Season
Replies: 295
Views: 37666

Re: It's back! F1 2020 Season

Sure, giving the seat to Hulk makes a lot of sense as he was on the grid last year. It's just that having a test or reserve driver and not give him the seat when you need him is a bit weird to me. Maybe the fact they were so close to the factory helped to make the decision. They were able to quickl...

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by akiss20
Fri Jul 31, 2020 5:42 pm
Forum: Non-Aviation
Topic: It's back! F1 2020 Season
Replies: 295
Views: 37666

Re: It's back! F1 2020 Season

Fair enough question, one I am sure he is asking too. I am guessing the RP bosses really want to maximize their chance at a podium now that they suddenly have essentially the number 2 car in the field and leap-frogged several places in one go. Gutierrez's pride comes second to that I suppose. Just m...

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by akiss20
Fri Jul 31, 2020 4:46 pm
Forum: Non-Aviation
Topic: It's back! F1 2020 Season
Replies: 295
Views: 37666

Re: It's back! F1 2020 Season

It’s been 4 years since Gutierrez drove a GP. Maybe RP wanted a more recently experienced driver, especially if they might be battling for a podium with the likes of Max.

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by akiss20
Mon Jul 06, 2020 10:56 am
Forum: Technical/Operations
Topic: Why are Alaska and Hawaii ICAO airport codes different from those in the contintental U.S.?
Replies: 9
Views: 4481

Re: Why are Alaska and Hawaii ICAO airport codes different from those in the contintental U.S.?

Let's not forget that when the ICAO proposed four-letter codes in 1947, the USA objected and said three-letter codes were sufficient... Hmmm.. Interesting. I wonder what made them think that??? I will have to apply my historian skills to research this as I find it interesting. Probably the same thi...

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by akiss20
Sat May 16, 2020 12:46 pm
Forum: Non-Aviation
Topic: Top of the Hub in Boston Permantely Closed
Replies: 10
Views: 1405

Re: Top of the Hub in Boston Permnantely Closed

Eh. Crappy overpriced food, you’re just paying for the view. The space isn’t going away, hopefully they will turn it into something more accessible. In the 11 years I’ve lived in Boston I went exactly once.

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by akiss20
Mon Feb 17, 2020 2:36 am
Forum: Technical/Operations
Topic: (Hypothetical) Water injection on high-bypass engine
Replies: 34
Views: 5482

Re: (Hypothetical) Water injection on high-bypass engine

If a water-injection system were to be installed on an aircraft high-bypass turbofan, where would the injectors be placed? My guess is probably in the core, just after the low-pressure turbine, or in the bypass duct. Probably not injecting it into the combustion chamber, as cooling the flame would ...

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by akiss20
Sat Jan 25, 2020 2:59 pm
Forum: Technical/Operations
Topic: Will ATC ever interact with the Autopilot?
Replies: 12
Views: 2162

Re: Will ATC ever interact with the Autopilot?

Garmin's new emergency autoland system will talk to ATC. I can see it eventually having some remote function. AFAIK it doesn’t really “talk” it just squawks 7700 and broadcasts to inform ATC an emergency is underway and what its intentions are (proceeding direct KXXX for landing runway Y, landing i...

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by akiss20
Fri Dec 20, 2019 8:51 pm
Forum: Technical/Operations
Topic: Will ATC ever interact with the Autopilot?
Replies: 12
Views: 2162

Re: Will ATC ever interact with the Autopilot?

Garmin's new emergency autoland system will talk to ATC. I can see it eventually having some remote function. AFAIK it doesn’t really “talk” it just squawks 7700 and broadcasts to inform ATC an emergency is underway and what its intentions are (proceeding direct KXXX for landing runway Y, landing i...

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by akiss20
Wed Dec 18, 2019 3:16 pm
Forum: Non-Aviation
Topic: Is Religious Freedom Losing Its Ground Around The Globe?
Replies: 66
Views: 3810

Re: Is Religious Freedom Loosing Its Ground Around The Globe?

It certainly is. At least in the US, you have all the tinker-toys running to the SCotUS if there is a manger on public property. Even the Pope is considered a plant. Funny how the same people who complain about not being able to put up a manger then clutch their pearls when the Satanic Temple tries...

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by akiss20
Sat Dec 14, 2019 4:14 pm
Forum: Technical/Operations
Topic: How much power is needed for pressurization?
Replies: 40
Views: 3877

Re: How much power is needed for pressurization?

I don't often calc compressed gasses, just building air where the pressure changes are low enough to be ignored. Didn't realize the compression would heat it that much, yet I've installed cooling towers to handle the large 120 psi plant aftercoolers. I would imagine the unit includes a heat pump th...

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by akiss20
Sat Dec 14, 2019 3:24 am
Forum: Technical/Operations
Topic: How much power is needed for pressurization?
Replies: 40
Views: 3877

Re: How much power is needed for pressurization?

In figure 2.2 of this report it lists the ECS/ Pressurization at cruise of 320 kW and 32 kW for ECS fans. I haven't found an airflow but I would guess that most of the load is heating the air from -50F to 70F, rather than pressurizing to about 7 psig. I am assuming that is the worst case demand loa...

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by akiss20
Fri Dec 13, 2019 10:21 pm
Forum: Technical/Operations
Topic: How much power is needed for pressurization?
Replies: 40
Views: 3877

Re: How much power is needed for pressurization?

In figure 2.2 of this report it lists the ECS/ Pressurization at cruise of 320 kW and 32 kW for ECS fans. I haven't found an airflow but I would guess that most of the load is heating the air from -50F to 70F, rather than pressurizing to about 7 psig. I am assuming that is the worst case demand loa...

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by akiss20
Mon Nov 25, 2019 2:19 pm
Forum: Non-Aviation
Topic: Tesla Truck: What the Hell?
Replies: 114
Views: 5361

Re: Tesla Truck: What the Hell?

187,000 deposits in 3 days. I told you it would sell. Tesla as I mentioned will only be able to build 200,000 to 300,000 of these worldwide per year. That’s a piece of cake compared to GM, Ford, and Ram, which each sells 1 million to 1.4 million per year, each. $100 refundable deposits aren’t the s...

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by akiss20
Tue Nov 05, 2019 2:21 pm
Forum: Technical/Operations
Topic: Most Commercially Active U.S. Airports With 100 Ft Wide Runways?
Replies: 16
Views: 1994

Re: Most Commercially Active U.S. Airports With 100 Ft Wide Runways?

If you don’t mind small airlines, a lot of the airports Cape Air flies into are 100’. KRUT, KPVC, KMVY etc. not sure that C414s is what you had in mind though.

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by akiss20
Mon Nov 04, 2019 10:16 pm
Forum: Technical/Operations
Topic: Why are turboprops so named ?
Replies: 56
Views: 10498

Re: Why are turboprops so named ?

Disagree. There is enough residual thrust from the exhaust, that the performance tables take it into account in the POH. At high speeds it can approach 10% in extreme cases, but is usually less. It is something like 50 kg of thrust on the ATR. Not even enough to get it rolling with brakes released....

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by akiss20
Fri Sep 27, 2019 1:29 pm
Forum: Non-Aviation
Topic: My Tiny Hometown on a UAL Aircraft
Replies: 11
Views: 3415

Re: My Tiny Hometown on a UAL Aircraft

Awesome! I grew up not 20 minutes from that red mill and have gone through many times. Very neat to see.

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by akiss20
Fri Sep 06, 2019 4:47 pm
Forum: Technical/Operations
Topic: Prince Harry's Private Jet
Replies: 23
Views: 4529

Re: Prince Harry's Private Jet

I won't name the owner, but at least one Gulfstream 650 travels with a backup Gulfstream 550 on most occasions. That seems a little excessive don't ya think? I know AF 1 does this routinely usually with a 757 backing the 747 but that is perhaps understandable should the big boy hae a serious breakd...

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by akiss20
Mon Sep 02, 2019 10:25 pm
Forum: Non-Aviation
Topic: Contact Lenses wearers
Replies: 18
Views: 3499

Re: Contact Lenses wearers

I have never used monthly lenses which you need to store mostly because I'm not interested in the hassle or storing them even if they are slightly cheaper. Glad you found what works for you, but something to note about daily lenses is that they tend to be a bit more fragile. My boyfriend wears dail...

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by akiss20
Mon Sep 02, 2019 12:54 pm
Forum: Non-Aviation
Topic: Contact Lenses wearers
Replies: 18
Views: 3499

Re: Contact Lenses wearers

Wore glasses for probably 7 years before trying contacts and god I hate going back occasionally. Contacts are way better IMO. Nothing like having ALL of your vision be clear rather than looking through a porthole of clear vision. I wear a set of contacts for probably 2-3 weeks before replacing (they...

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by akiss20
Wed Jul 03, 2019 6:39 pm
Forum: Technical/Operations
Topic: Jet buzzsaw noise
Replies: 17
Views: 2338

Re: Jet buzzsaw noise

That’s exactly what I said. “And its harmonics up to blade passing frequency” You said "also". Only the shaft frequency and its harmonics are created by supersonic blade tip speed and are perceived as buzzsaw noise. And the harmonics of the shaft frequency reach far beyond the BPF. Gruß, ...

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by akiss20
Wed Jul 03, 2019 4:07 pm
Forum: Technical/Operations
Topic: Jet buzzsaw noise
Replies: 17
Views: 2338

Re: Jet buzzsaw noise

It is not "also" at shaft frequency, it is only at shaft frequency and many many of its harmonics. You can also have a pronounced peak at the blade passing frequency, but that one doesn't disappear at cruise level. It might just get less pronounced. Gruß, masi1157 That’s exactly what I sa...

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by akiss20
Wed Jul 03, 2019 2:12 pm
Forum: Technical/Operations
Topic: Jet buzzsaw noise
Replies: 17
Views: 2338

Re: Jet buzzsaw noise

You are both right, the buzzsaw noise is due to shocks with a tip Mach number greater than unity but is also at shaft frequency and it’s harmonics up to blade passing frequency. See my post from a long time ago about this https://www.airliners.net/forum/viewtopic.php?f=5&t=775259&p=11182623#...

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by akiss20
Mon Jun 17, 2019 2:39 pm
Forum: Non-Aviation
Topic: Graphing calculators
Replies: 16
Views: 2640

Re: Graphing calculators

The old joke is that we should peg our currencies to the price of the TI-83, it’s been $100 for decades now.

After high school I have never used my graphing calculator in college or now in grad school. Either everything is symbolic or when I am doing numerical anything it’s in Matlab.

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by akiss20
Sat Apr 06, 2019 5:41 pm
Forum: Technical/Operations
Topic: Neo vs Ceo cockpit differences
Replies: 9
Views: 2953

Re: Neo vs Ceo cockpit differences

What is dual cool theoretically supposed to do?

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by akiss20
Thu Mar 14, 2019 8:38 pm
Forum: Technical/Operations
Topic: Is there a problem with Boeing’s engineering team?
Replies: 33
Views: 4766

Re: Is there a problem with Boeing’s engineering team?

I wouldn't be at all surprised if in 50 years some old engineer writes a tell-all about how they raised concerns to management and those concerns were promptly ignored. Management of large engineering projects have long histories of ignoring on the ground engineers for the sake of meeting some goal ...

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by akiss20
Wed Mar 06, 2019 9:59 pm
Forum: Non-Aviation
Topic: Imperial System
Replies: 230
Views: 13001

Re: Imperial System

Tugg, There are issues though, and metric solves them much better. Newtons vs Pound-force 1 Liter of water weighs 1 KG At what pressure and temperature :) This relationship is not definitionally true anymore, although 1L of water is very close to 1Kg. The kilogram was defined in 1795 as the weight ...

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by akiss20
Wed Mar 06, 2019 9:48 pm
Forum: Non-Aviation
Topic: Imperial System
Replies: 230
Views: 13001

Re: Imperial System

This is not true. All base SI units will be based off of exact values of physical constants in the universe (the kilogram and a few others are switching definition on May 20th 2019). The meter is defined off the distance the speed of light travels in a certain amount of time (and the second itself ...

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by akiss20
Wed Mar 06, 2019 8:55 pm
Forum: Non-Aviation
Topic: Imperial System
Replies: 230
Views: 13001

Re: Imperial System

I love this discussion. I see little value in switching to the metric system as conversion is easy (especially nowadays). Also thought metric supporters claim it is "scientific" it really isn't anymore so really than imperial. It is just based on a different set base of measurement. The m...

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by akiss20
Wed Feb 27, 2019 4:05 pm
Forum: Non-Aviation
Topic: Repub. Rep warns Cohen
Replies: 64
Views: 5539

Re: Repub. Rep warns Cohen

apodino wrote:
Can a legal expert weigh in on here for me? How does Cohens testimony not violate attorney client privilege?

He’s already been disbarred so what else does he have to lose? Is violating attorney client privilege actually a crime? Not as far as I know but I’m no expert.

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by akiss20
Thu Feb 07, 2019 4:02 am
Forum: Technical/Operations
Topic: PAE An-124 Spoolup
Replies: 10
Views: 3116

Re: PAE An-124 Spoolup

Maybe taxi out/delays were shorter than expected and they needed to get down to MTOW? If you need to burn fuel fast, TO power is your best bet and probably not too many places you can throttle up near a runway besides the runway itself.

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