Search found 172 matches

by MatthewDB
Sun Jun 24, 2018 3:42 am
Forum: Technical/Operations
Topic: Windmilling with a tail wind & lubrication
Replies: 8
Views: 1609

Re: Windmilling with a tail wind & lubrication

N2 doesn’t typically windmill. There just isn’t enough velocity to do it. What you’re seeing is N1 or the Fan. I’ve never seen a prohibition against, nor an inspection required for windmilling on the ground due to surface winds. Cleary I reversed the terminology... Yes, all I could see is the fan a...

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by MatthewDB
Mon Jun 18, 2018 11:51 pm
Forum: Technical/Operations
Topic: Windmilling with a tail wind & lubrication
Replies: 8
Views: 1609

Windmilling with a tail wind & lubrication

I recently transited through AMS, and went for a bus ride across the airport. It was quite blustery and I noticed many of the aircraft were windmilling pretty good. I noticed that for the aircraft parked tail to the wind, the windmilling rotated the fan in reverse. This led me to wonder, is there an...

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by MatthewDB
Mon May 28, 2018 6:56 am
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

Bouncy castle/balloons are for stage 2 return (probably on land).Fairings 'have' to land at sea and can't get drenched in salt water hence the 'catchers Mit' boat. What is on the faring that can't be made "salt-proof"? I would think if they made the parts either salt resistant or easily r...

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by MatthewDB
Wed May 23, 2018 6:45 am
Forum: Civil Aviation
Topic: Oregon Aviation Thread - 2018
Replies: 1408
Views: 142153

Re: Oregon Aviation Thread - 2018

When we start to see the number of flights to/from PDX-SEA start to decline (currently ~30/day each way) we’ll start getting more domestic and international nonstops. As long as passengers to/from Portland continue to accept connecting thru Seattle, we’ll get squat. The airline business model of us...

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by MatthewDB
Fri May 11, 2018 6:29 am
Forum: Civil Aviation
Topic: Oregon Aviation Thread - 2018
Replies: 1408
Views: 142153

Re: Oregon Aviation Thread - 2018

twincommander wrote:
MatthewDB wrote:
Anyone know why there was an Antinov 124 next to 28R/10L today?


Ramp space in PDX is cheaper than in PAE...


That still leaves us completely clueless....

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by MatthewDB
Thu May 10, 2018 5:08 am
Forum: Civil Aviation
Topic: Oregon Aviation Thread - 2018
Replies: 1408
Views: 142153

Re: Oregon Aviation Thread - 2018

Anyone know why there was an Antinov 124 next to 28R/10L today?

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by MatthewDB
Thu May 10, 2018 4:42 am
Forum: Civil Aviation
Topic: AA gate agent asks nursing mom "How many boobs do you have"
Replies: 73
Views: 9856

AA gate agent asks nursing mom "How many boobs do you have"

- Breastfeeding mom Kelsey Myers was reduced to tears before boarding a flight - Myers was preparing to travel home from LAX to ORD with American Airlines - While boarding, she was stopped by two airline employees who told her she was carrying too many bags - Myers assured them she was well-informed...

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by MatthewDB
Sat Apr 28, 2018 2:14 pm
Forum: Civil Aviation
Topic: Family Suing AA Over Death of Passenger
Replies: 256
Views: 20804

Re: Family Suing AA Over Death of Passenger

People keep mentioning "over-weight" or "dumping fuel." Would that be needed at this point in the flight? The diversion would have saved 90 minutes at most. I would think the trip from Hawaii across the Pacific would have burned more than enough fuel to lighten the airplane to a ...

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by MatthewDB
Sun Apr 01, 2018 8:09 pm
Forum: Civil Aviation
Topic: Aeroflot sent American citizens to New Delhi
Replies: 89
Views: 12900

Re: Aeroflot sent American citizens to New Delhi

I have never heard of using Aeroflot and Moscow as a one stop to India from the US! My, that is really asking for it! It seems they got what they paid for. It’s like the international version of travel hell from Allegiant or Spirit airlines. Western US to India flights suck for routing options. Mos...

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by MatthewDB
Sun Apr 01, 2018 7:23 pm
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

https://www.space.com/40153-spacex-laun ... tions.html
-->

Apparently SpaceX needs permits to show video of the earth from space and doesn't have them (yet). This means launches will cut video at some point during the 2nd stage burn.

https://www.space.com/40153-spacex-laun ... tions.html

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by MatthewDB
Tue Mar 20, 2018 6:19 am
Forum: Civil Aviation
Topic: Possibility of L-1011 or MD-11 NextGen?
Replies: 38
Views: 5634

Re: Possibility of L-1011 or MD-11 NextGen?

Looking at the Ge9X engine, one would think that aircraft will need more engines if they needed more thrust. These very high bypass turbofans might have reached the fan design limits. So, never say no to a new three holer design! That makes for a very large S-duct or hole through the vertical stabi...

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by MatthewDB
Tue Mar 20, 2018 6:17 am
Forum: Civil Aviation
Topic: Possibility of L-1011 or MD-11 NextGen?
Replies: 38
Views: 5634

Re: Possibility of L-1011 or MD-11 NextGen?

What if Airbus rolled out with a tri-jet A360, or Boeing with the 797? They could easily make a fuel-efficient tri-jet. It's just a matter of someone sitting down and creating one. I don't think we'll see it from Boeing since they're looking towards the gap between the 737 and the 777 as the future...

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by MatthewDB
Tue Mar 20, 2018 5:12 am
Forum: Civil Aviation
Topic: Passengers fight on Southwest flight
Replies: 65
Views: 9396

Re: Passengers fight on Southwest flight

I am totally serious. And it's not breaking the "rules" to do so. Though, it's obviously breaking one of your rules. I'm one of those people too. I didn't know there was a rule. My carry on is smaller than the limit, I take a checked bag when needed. I don't do 10 rows, but I will do 3-5....

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by MatthewDB
Tue Mar 20, 2018 4:59 am
Forum: Travel, Polls & Preferences
Topic: Packaged food must come out for TSA screening?
Replies: 47
Views: 2662

Re: TSA now wants food out of bags for inspection?

Had this happen in ROC a couple months ago. They wanted all food taken out. Unfortunately I had a bunch of stuff; my smaller bag is mainly snacks and quick meals. Combined with having to take out my iPads there wasn't much left in the bag - almost everything was outside the bag in a plastic bin, on...

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by MatthewDB
Sat Mar 17, 2018 3:34 am
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

Tugger is correct, but I have to add that much of the force absorbed by the water is acoustic vibrations. By sheer fact of no atmosphere on the Moon, and Mars having less than 0.1% of Earth's atmosphere (according to wiki, so please correct me if I am wrong), there simply aren't enough gaseous mole...

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by MatthewDB
Sat Mar 17, 2018 3:19 am
Forum: Technical/Operations
Topic: Plane Flying with Landing Gear Down
Replies: 22
Views: 3664

Re: Plane Flying with Landing Gear Down

I can not speak about the 777 but on my type (A320) you rarely get hot brakes in flight (it is however a common occurrence on ground). In fact I only got the warning one time (on an other flight it was only 60° below the warning and it was a short flight, therefore we decided to keep the gear down ...

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by MatthewDB
Sat Mar 17, 2018 3:12 am
Forum: Civil Aviation
Topic: Oregon Aviation Thread - 2018
Replies: 1408
Views: 142153

Re: Oregon Aviation Thread - 2018

AM is daily this summer. Heard they're doing well at PDX?! PDX-MEX is daily/year round. Not sure why they’ve dropped a few Tuesdays recently. PDX-GDL on Volaris is going to 6x weekly from June 17th to July 14th. Flight will not operate on Thursdays. Regarding AM apparently dropping Tuesday flights ...

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by MatthewDB
Sat Mar 17, 2018 2:57 am
Forum: Civil Aviation
Topic: Narita cleared to extend hours, build new runway
Replies: 48
Views: 14770

Re: Narita cleared to extend hours, build new runway

Any word if they will make the train to Tokyo faster? Right now, the only "express" bit of Narita Express is that it is non-stop. What's the ride like? So far I've used NRT only as a stop-over for other Asian destinations, and HND to get to Tokyo. My employer has some weird contracts. We ...

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by MatthewDB
Sat Mar 17, 2018 2:39 am
Forum: Civil Aviation
Topic: Passengers fight on Southwest flight
Replies: 65
Views: 9396

Re: Passengers fight on Southwest flight

My strategy for flying, is that if I am one of the first to board, I put my "heavy" carry on in an overhead near the front of the plane. Then, after landing, I don't have to stand in a line from the back end of the plane, with that heavy carry on over my shoulder. Either your joking or yo...

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by MatthewDB
Sat Mar 17, 2018 2:28 am
Forum: Civil Aviation
Topic: Time to Change "Compliance with All Crewmember Instructions"?
Replies: 103
Views: 9221

Re: Time to Change "Compliance with All Crewmember Instructions"?

I agree with you completely! Far too often the media provide news about FAs that are rarely accurate. Pax usually see us as the enemy, rather than the friendly, trained, hand that is there to save your behind. Pax getting ridiculous about the use of the phone, and developing childish behaviors that...

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by MatthewDB
Sat Mar 17, 2018 2:22 am
Forum: Travel, Polls & Preferences
Topic: Packaged food must come out for TSA screening?
Replies: 47
Views: 2662

Re: TSA now wants food out of bags for inspection?

What about TSA Pre-check?

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by MatthewDB
Sat Mar 17, 2018 2:20 am
Forum: Civil Aviation
Topic: United Mishandles Their Third Pet In Three Days
Replies: 30
Views: 4324

Re: United Mishandles Their Third Pet In Three Days

Well, stupid error, but UA went old school and dropped it off on the way. Quick thinking, though costly. As a huge UA detractor myself, I agree with you. The reaction by UA in this case deserves praise. Too often UA puts the bottom line above doing the right thing. This shows promise of improving t...

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by MatthewDB
Fri Mar 16, 2018 4:08 am
Forum: Civil Aviation
Topic: Dog Dies in Overhead Bin on United Airlines Flight
Replies: 491
Views: 35243

Re: Dog Dies in Overhead Bin on United Airlines Flight

Quick question: have people always brought their pets aboard planes as frequently as they do now? Was this common in say the 80s and 90s? My questions are kind of off topic but I'm just curious if this has always been a thing. No. I had a gap in the late aughts and early teens where I didn't travel...

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by MatthewDB
Fri Mar 16, 2018 4:00 am
Forum: Civil Aviation
Topic: Dog Dies in Overhead Bin on United Airlines Flight
Replies: 491
Views: 35243

Re: Dog Dies in Overhead Bin on United Airlines Flight

The airline make the rules, and the airlines disagree with you. Yes and I disagree with the airline. I believe they should keep all animals in the cargo hold. Who cares if you disagree with the airlines. THE AIRLINES MAKE THE RULES -- NOT YOU Unless the rules become so unfair, so unsided, "the...

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by MatthewDB
Thu Mar 15, 2018 7:12 am
Forum: Civil Aviation
Topic: Dog Dies in Overhead Bin on United Airlines Flight
Replies: 491
Views: 35243

Re: Dog killed onboard United Airlines flight (in cabin)

For the rest of you, I don't want to clog up the thread with banter but I do get rather defensive when the mistakes of a few become a reflection of an entire company. Mistakes happen on EVERY airline, EVERY day. There are tens of thousands of UA employees that come to work every day and do the best...

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by MatthewDB
Fri Mar 02, 2018 2:55 am
Forum: Technical/Operations
Topic: Rodents (mice, rat, cockroaches) handling on an aircraft
Replies: 18
Views: 2110

Re: Rodents (mice, rat, cockroaches) handling on an aircraft

Fly it to North Dakota in the winter, drain the water and leave it for the night. Any vermin will be dead in the morning.

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by MatthewDB
Sun Feb 25, 2018 6:06 am
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

Francoflier wrote:
SpaceX is turning into a booming shipyard business as well.


That begs the question: Who is doing their shipyard work? They seem to be moving quite fast in all of the various new vessels SpaceX needs.

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by MatthewDB
Sun Feb 25, 2018 6:04 am
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

I would say this is an ample way to shorten 16,345 feet +/-250 feet. I would find it rather surprising if the search area is exactly 16,345 feet at all points.... Same with about 100m/328 feet. 100 meters are not 328 feet, that is still ~2.5% off. So, 100 meters are about 328 feet. But then again, ...

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by MatthewDB
Tue Feb 20, 2018 5:17 am
Forum: Civil Aviation
Topic: Happy 36th birthday to the Boeing 757
Replies: 58
Views: 5961

Re: Happy 36th birthday to the Boeing 757

All you flamers, stop. Unless you fly, not ride, the planes, you will see the trueness of the planes. Manufactures can make numbers what ever you wish but when your at the gate looking at your papers seeing the truth in flight planning, looking at the weather, verifying winds in the FMS and seeing ...

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by MatthewDB
Tue Feb 20, 2018 5:04 am
Forum: Military Aviation & Space Flight
Topic: To Make Way for B-21, Air Force Plans to Retire B-1, B-2 in 2030s
Replies: 23
Views: 2691

Re: To Make Way for B-21, Air Force Plans to Retire B-1, B-2 in 2030s

The B-52 is a much more effective psychological weapon! While the B-1 does have TFR, it's not used. You're ignoring the ability of the B1 to perform in airshows for the enemy. On the deck, full throttle with afterburner over the heads of people deciding what side they're on for the day is an effect...

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by MatthewDB
Fri Feb 16, 2018 4:30 am
Forum: Technical/Operations
Topic: Boeing 747 Landing Light Question
Replies: 21
Views: 2181

Re: Boeing 747 Landing Light Question

On a dc halogen Just saw this...really doesn't make a difference, but I'm pedantic enough to point out that the lighting is AC not DC. I was noodling on how exactly 1970's technology was going to deliver a low cost way to drop from 28V to 24V without a resistor. Then your post makes it rather clear.

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by MatthewDB
Wed Feb 14, 2018 6:56 am
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

New droneship landing platform : A Shortfall of Gravitas to join the east coast fleet. This should help in cases where the load requires the boosters to be too far out to sea. Wonder why there isn't a 3rd as they might need three platforms? https://www.floridatoday.com/story/tech/science/space/2018...

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by MatthewDB
Wed Feb 14, 2018 6:38 am
Forum: Military Aviation & Space Flight
Topic: Nuclear war.....
Replies: 16
Views: 1530

Re: Nuclear war.....

Considering that there pretty much is no fissile material on this planet that can´t be identified down to when, where and in which part of the reactor it was made, it is highly unlikely that anyone will get enough material to build a fission bomb without some country announcing the theft of that ma...

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by MatthewDB
Wed Feb 14, 2018 6:28 am
Forum: Military Aviation & Space Flight
Topic: Nuclear war.....
Replies: 16
Views: 1530

Re: Nuclear war.....

Best option is SLBM as there is no reason for first strike. Only if they're kept at sea. One of the consequences of the Walker scandal is that the Soviets (now Russians) and later the Chinese have not tried a blue water SLBM force as they know the US will trail every missile boat, ready to destroy ...

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by MatthewDB
Sun Feb 11, 2018 6:34 am
Forum: Technical/Operations
Topic: Named Runways
Replies: 27
Views: 2365

Re: Named Runways

Well, you can't takeoff on 18R in AMS. But of course, they only use the correct numbers. 36L or 18R Never been to AMS and not privy to the situation. Why can't 18R be used to takeoff?? If you look at it on a map, the answer is obvious. There are lots of places with staggered runways where it makes ...

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by MatthewDB
Fri Feb 09, 2018 4:36 am
Forum: Civil Aviation
Topic: UPS launches its longest ever flight SDF-DXB on 747-8F
Replies: 50
Views: 9856

Re: UPS launches its longest ever flight SDF-DXB on 747-8F

UPS and Fedex have very nice catering. Several choices they can order in advance, as well as coolers full of drinks and a coffee maker. Some of the other carriers like Atlas need to be more creative since they fly to a lot of far flung places. Sometimes they will arrange local hotels or restaurants...

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by MatthewDB
Fri Feb 09, 2018 12:22 am
Forum: Civil Aviation
Topic: UPS launches its longest ever flight SDF-DXB on 747-8F
Replies: 50
Views: 9856

Re: UPS launches its longest ever flight SDF-DXB on 747-8F

UPS and Fedex have very nice catering. Several choices they can order in advance, as well as coolers full of drinks and a coffee maker. Some of the other carriers like Atlas need to be more creative since they fly to a lot of far flung places. Sometimes they will arrange local hotels or restaurants...

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by MatthewDB
Thu Feb 08, 2018 11:54 pm
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

Was the moon visible at any point in the starman video? Or was the brightness of the sun always so much that it couldn't ever be seen?

How about the second stage 3rd burn? Was that ever caught on video?

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by MatthewDB
Wed Feb 07, 2018 9:47 pm
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

I just re-watched it for what has got to be the 10th time by now. I'm glad there are clips now on youtube that only show the launch through landing. I come up with similar number QuarkFly. Am I the only one that noted that there was video from one booster shown twice on the split screen? I suspected...

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by MatthewDB
Wed Feb 07, 2018 9:06 pm
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

As for the fairings.I am not sure quite what they are doing.They are practically if not totally in orbit when they release.How do they slow them down,how do they guide them - really bad shape at such speeds/altitude. The fairings are released at far less than orbital velocity...at about 110 km (70 ...

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by MatthewDB
Wed Feb 07, 2018 9:00 pm
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

As an ex competition level paraglide pilot I can tell you pin point landings are very difficult even in good conditions - and that's will 100% human precision!( well perhaps not 100% in my case!) Nope I'm going to stick with my thought on this one - bring the fairings and second stage back all toge...

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by MatthewDB
Tue Feb 06, 2018 10:30 pm
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

How long will the Starman camera and transmission hold out? Did the put solar panels on it or will the batteries die soon?

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by MatthewDB
Wed Jan 31, 2018 5:27 am
Forum: Civil Aviation
Topic: Near miss near TLV
Replies: 11
Views: 4599

Re: Near miss near TLV

Near miss. They missed each other, but they were very near/close. Of course it was a near hit. If it was a near miss there would have been a collision. One of the peculiarities of the English language. George Carlin covered this well: https://www.youtube.com/watch?v=zDKdvTecYAM If you haven't seen ...

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by MatthewDB
Wed Jan 31, 2018 5:02 am
Forum: Civil Aviation
Topic: MH370: Malaysia resumes search to find aircraft
Replies: 418
Views: 78231

Re: MH370: Malaysia set to announce resumption of search as early as this week

It should have been roughly a week now. Based on the article, that would be more or less the time it takes them to scan the "hottest" 5000sqm area. Does anyone know what would be the first media to issue an announcement in case of some positive news? Malaysian government? I would expect t...

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by MatthewDB
Wed Jan 31, 2018 4:55 am
Forum: Civil Aviation
Topic: United denies boarding to an Emotional Support Peacock
Replies: 112
Views: 23663

Re: United denies boarding to an Emotional Support Peacock

As an avowed United hater, let me say this will be the rare time where I say right on United! Hey, he did buy an extra seat for the Peacock! So cool, who doesn't love Peacocks? Anyone who says that hasn't spent much time around them. They sound like a woman screaming when they call. They also poop l...

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by MatthewDB
Tue Jan 23, 2018 2:24 am
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

Thx Karel.Shame but expected. Regarding an orbiting Moon station.I can't see - from a refuling to Mars POV - why you would want to lug the fuel all the way out there.Must be far easier to do it in Earth orbit ( and quicker) no? Spacex have ( I believe) said that the BFR could go to the moon ,land a...

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by MatthewDB
Tue Jan 23, 2018 1:59 am
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

Something that just came to mind with the US government shutdown. Looking at the schedule there are two commercial launches next month. It will be interesting to watch the shutdown and if this then impacts SpaceX's future launch opportunities. Well the good news is it looks like it was a 1 workday ...

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by MatthewDB
Mon Jan 22, 2018 12:44 am
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

How does the delta-V work out compared to all of the options? Geosynchronous orbit sucks, it takes a load of delta-V to circularize the orbit, and when you leave it takes a bunch to get to escape. That's part of the benefit to a lunar orbit or a lunar base, the moon helps capture and adds energy. I ...

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by MatthewDB
Fri Jan 19, 2018 6:08 am
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

Maybe you can educate me on this. The STS SRB's were twice cost to refurbish vs buying new and NASA did this for every shuttle launch? As per some info around the internet, it was actually between x2.5 and x3. Obviously not what they had in mind when they designed the whole thing (in the end the am...

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by MatthewDB
Wed Jan 17, 2018 4:12 pm
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 298396

Re: SpaceX - Tests, Launches, Developments

I don't think SpaceX is developing the Texas launch site to pull back from the cape, but to gain capacity. That said, it has several advantages. It's the closest to the equator you're ever going to see a launch site in the continental US. The site is a few miles from the Mexican border. Only the tip...

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