SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

   PastimesTravel Forum


Previous 10 Next 10 
From: TimF11/6/2018 9:43:48 PM
   of 1490
 
Why the World is Running Out of Pilots

youtube.com

Share RecommendKeepReplyMark as Last Read


From: TimF2/20/2019 8:31:52 AM
1 Recommendation   of 1490
 
A Commercial Flight Hit an Absurdly Fast 801 MPH While Flying Over the United States

A Virgin Atlantic flight making the grueling journey from Los Angeles to London yesterday hit a ground speed of at least 801 mph, thanks to a streak of fast-moving air in the jet stream over Pennsylvania. You’re probably wondering how, as breaking the sound barrier over land is illegal, but despite surpassing the speed required to break the sound barrier, there was no sonic boom.

And no, the Virgin Atlantic flight wasn’t in some super-special mystery jet that you haven’t heard of. And no, they’re not bringing the Concorde back. Here’s what happened.

The 801 mph ground speed of the Boeing 787-9 was reported on the flight tracker system Flight Aware, and was tweeted out by meteorology teacher Stu Ostro:

The typical cruising speed for a plane of this size is only around 560 mph, which is a long way off of the speed of sound’s 767 mph (although the speed of sound does vary based on altitude, air temperature, pressure, and on and on, and that 767 mph figure is based on a reading at sea level under standard conditions).And that’s exactly why there was no sonic boom for this 801 mph flight. I’ll let the Washington Post explain:
With a speed max currently over central Pennsylvania, airplanes flying through the jet will either be sped up or slowed down big time, depending on their direction of travel. It’s like the moving walkway at the airport. You have your own forward speed, but if you continue this velocity in an environment that is itself moving, it can propel you at an impressive rate.

[...]

Commercial aircraft ordinarily can’t break the sound barrier, because they’re not designed to handle the sudden increase in drag and other aerodynamic effects associated with those speeds. Despite a ground speed that high, the plane didn’t come close to reaching that threshold because it was embedded in the swiftly moving air.?
So the plane, in this case, was essentially carried along at those speeds by the air around it, so that while it’s ground speed was faster than the speed of sound, its air speed was not. Otherwise the stress of flying near or over the speed of sound would add significant strain on the body of the plane and its control surfaces, and potentially spell disaster. If a plane isn’t meant to go faster than the speed of sound, then it really, really shouldn’t.

Despite not being in the jet stream over the northeast very long, the plane managed to arrive 48 minutes early in London, and most flights headed east over this area of North America are expected to have shorter flight times in the coming days. Of course, any flight going the other direction will either have to fight the wind or go around, so they’re expected to have longer flight times.

The jet streams winds are typically faster-moving in the winter, the Post reports, because of the maximized temperature differences between the northern and southern parts of North America...

jalopnik.com

Share RecommendKeepReplyMark as Last ReadRead Replies (2)


To: TimF who wrote (1462)2/20/2019 2:18:11 PM
From: elpolvo
   of 1490
 
airspeed... groundspeed... godspeed...
it's all relative...


Share RecommendKeepReplyMark as Last Read


From: TimF9/2/2019 1:21:02 PM
   of 1490
 

imgur.com

Share RecommendKeepReplyMark as Last Read


From: TimF9/17/2019 8:08:08 PM
   of 1490
 
Boeing's China Problem

youtube.com

Share RecommendKeepReplyMark as Last Read


To: cruisingtime who wrote (1453)9/20/2019 4:13:42 AM
From: backpackerstephen
   of 1490
 
Hey!

Since it sounds like you are renting your own boat you have a ton of options. It really depends on what you are looking for. The places you mentioned are all great. (I haven't been to Makarska but have heard good things). But they are all pretty popular. There are a lot of islands where you can get off the beaten track if that is how you want to travel. Split is a must in my opinion. It is one of my favorite places in Croatia.

If you are wanting a sailing tour there are a few companies I know. Busabout does a sailing Croatia tour. But it is geared more towards backpackers. There are also a lot of tour agents where you can find a tour to meet your needs.

This is a great post for reading about the best islands in Croatia that might give you some more insight.

Share RecommendKeepReplyMark as Last Read


To: TimF who wrote (1462)9/20/2019 4:16:45 AM
From: backpackerstephen
   of 1490
 
Wow! This is insane! Thanks for sharing. I wonder what it would have been like to be on that plane. lol

Share RecommendKeepReplyMark as Last ReadRead Replies (1)


To: TimF who wrote (1449)9/20/2019 4:19:15 AM
From: backpackerstephen
   of 1490
 
wow! I fly international a lot. Roughly 50 times a year. And this has always been a fear of mine. That employee should get a bous.

Share RecommendKeepReplyMark as Last ReadRead Replies (1)


To: backpackerstephen who wrote (1468)9/20/2019 11:25:37 AM
From: TimF
   of 1490
 
I didn't have a drunk pilot taken off the plane, but I did have a situation where the pilot caused a big delay and the airline let us know about it. They announced that the pilot thought he wasn't working that day, and didn't make it in for the flight, that they were going to get another pilot but the one they picked was coming in on an international flight and had to clear customs first.

Usually businesses won't broadcast something like that but I also had a case where I was arriving late to a hotel and no one was there to check me in. The hotel was on a beach island and I was staying there in the off season (for work nearby not to hang out on a cold beach). There was a number to call, apparently the one employee who lived on the island. She arrived and was rather annoyed at her coworker and let me know about it. Apparently the coworker thought that everyone booked for the night had arrived (they also screwed up my reservation, more on that below) and left hours early but put in her time as if she had left at something like midnight or 1 AM when she was supposed to leave.

So after a wait I get checked in, then they charged me for two stays. The employee who showed up creating a new booking for me, leaving their messed up reservation in the system. And they didn't wait until checkout to start charging. Unlike now, at the time I barely had any spare capacity on the card. I barely had money to eat, and I wondered whether I'd be sleeping in my car at my next stop or trying to call relatives and ask if they would pay for the hotel room. (The company pays for the rooms but only after I submit and expense report later not up front.) But finally I got them to refund the extra money. In fact I think they refunded a bit too much.

I've had my reservation messed up at another hotel once. This time they had the start right but not the end. I got back from my work site and they had taken all my stuff out of the room and put it in to storage. But they admitted there mistake, and gave me another room. No upgrade but I did get a free dinner at the hotel's restaurant.

Share RecommendKeepReplyMark as Last Read


To: backpackerstephen who wrote (1467)9/20/2019 11:29:55 AM
From: TimF
   of 1490
 
Other then getting in to your destination early I'm not sure it would have been a huge thing on the plane. 801 ground speed but air speed was normal. As long as it was turbulent I don't think the passengers would have noticed.

Share RecommendKeepReplyMark as Last Read
Previous 10 Next 10