Search found 356 matches

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by Yikes!
Wed Jul 29, 2020 1:29 am
Forum: Technical/Operations
Topic: Concorde longest transatlantic crossing due to unusual jet stream?
Replies: 13
Views: 1743

Re: Concorde longest transatlantic crossing due to unusual jet stream?

The standard of M2.0 cruise climb to TOD (top of descent) was its SOP (standard operating procedure). There was no "cruising" flight level. Its NAT tracks were pre-described. Other flights probably followed the same philosophy - cruise climb to TOD. As an anecdotal account, my crossing was...

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by Yikes!
Tue Jun 02, 2020 12:35 am
Forum: Technical/Operations
Topic: Landing wind direction
Replies: 28
Views: 2686

Re: Landing wind direction

Another consideration, given some aircraft that have a 20 knot tailwind for landing, is tire speed. Most heavy jets have tire maximum speed in excess of 230 kts ground speed. Where "on time performance" is so important, and a tailwind landing can accomplish this, the tailwind landing is an...

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by Yikes!
Thu May 21, 2020 4:58 am
Forum: Technical/Operations
Topic: Why are Alaska and Hawaii ICAO airport codes different from those in the contintental U.S.?
Replies: 9
Views: 3152

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... The ICAO system was devised before either were states and both were assigned to the PAC ICAO region. Indeed, the very first proposal was [national identification][...

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by Yikes!
Sun May 17, 2020 8:34 pm
Forum: Technical/Operations
Topic: Why are Alaska and Hawaii ICAO airport codes different from those in the contintental U.S.?
Replies: 9
Views: 3152

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

Alaska and Hawaii gained statehood under the US Constitution in 1959 - long after the initial ICAO "K" codes were compiled for the continental USA.

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by Yikes!
Wed May 13, 2020 1:27 am
Forum: Technical/Operations
Topic: HAL 3 - interesting routing today
Replies: 4
Views: 1266

Re: HAL 3 - interesting routing today

Routing probably due to prevailing winds. "Pressure pattern" flying term used in old days.

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by Yikes!
Wed Apr 29, 2020 3:12 am
Forum: Technical/Operations
Topic: Dead bolt
Replies: 9
Views: 2233

Re: Dead bolt

This should be addressed by your operator, NOT on a public forum. It’s a security procedure, thus closely held. What is it with so many people in this forum to ignore pure security related issues? I've been complaining of this for over 20 years on this forum which largely influenced my withdrawal f...

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by Yikes!
Thu Feb 20, 2020 1:26 am
Forum: Technical/Operations
Topic: (Hypothetical) Water injection on high-bypass engine
Replies: 34
Views: 4437

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 Yikes!
Thu Jan 30, 2020 3:42 am
Forum: Technical/Operations
Topic: How to identify the length of a runway?
Replies: 19
Views: 2104

Re: How to identify the length of a runway?

LH707330 wrote:
The little black signs with the thousands of feet remaining should be pretty good.


Few, other than military fields, have these markers. Simply referring to your company's route manual will give you the information you need.

'

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by Yikes!
Mon Dec 16, 2019 3:56 am
Forum: Technical/Operations
Topic: Could a human stop an engine start?
Replies: 20
Views: 4042

Re: Could a human stop an engine start?

Don’t know if it’s a urban legend but I’ve heard it could be done with a PT-6 turbo prop, but I wouldn’t want to try it ! saw it done on a PT-6 once but it was a free turbine and not geared. It's not urban legend. I have done it. During extremely cold starts (< -40C), there is virtually no lubricat...

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by Yikes!
Wed Dec 11, 2019 10:13 pm
Forum: Technical/Operations
Topic: How much power is needed for pressurization?
Replies: 40
Views: 3269

Re: How much power is needed for pressurization?

Judging by the difference resulting from turning the packs off to increase takeoff performance, in terms of engine power the answer is "not very much but enough to be significant". To illustrate, let's calculate performance taking off from a relatively short runway in terms of long haul w...

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by Yikes!
Wed Dec 11, 2019 10:11 pm
Forum: Technical/Operations
Topic: How much power is needed for pressurization?
Replies: 40
Views: 3269

Re: How much power is needed for pressurization?

Judging by the difference resulting from turning the packs off to increase takeoff performance, in terms of engine power the answer is "not very much but enough to be significant". To illustrate, let's calculate performance taking off from a relatively short runway in terms of long haul w...

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by Yikes!
Wed Dec 11, 2019 3:07 am
Forum: Technical/Operations
Topic: How much power is needed for pressurization?
Replies: 40
Views: 3269

Re: How much power is needed for pressurization?

Hard to answer as the question is kind of like "how many times do I need to breathe to stay alive?" Aircraft have generally been pressurized over the decades by excess bleed air drawn from the engine's compressor. The B787 is radically different in that it uses bleed air from onboard Auxil...

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by Yikes!
Mon Dec 09, 2019 12:01 am
Forum: Technical/Operations
Topic: Can engine type be changed on an airplane?
Replies: 32
Views: 6072

Re: Can engine type be changed on an airplane?

On many large jets, manufacturers offer a multitude of engine choices. Once installed, it is very expensive to change from one to another. I think the original question might have been towards something like Canada's Canadair CL-215 (with originally designed Pratt & Whitney R-2800-83AM radial en...

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by Yikes!
Sun Dec 08, 2019 11:45 pm
Forum: Technical/Operations
Topic: The math behind twins.
Replies: 36
Views: 4313

Re: The math behind twins.

What's all this crap about boats on an AIRLINERS technical forum?????? (Just kidding! ROTFLMAO...Great discussion!)

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by Yikes!
Sun Dec 08, 2019 11:39 pm
Forum: Technical/Operations
Topic: How often/practical flying with full fuel tanks?
Replies: 14
Views: 2637

Re: How often/practical flying with full fuel tanks?

Very rare to fly large transport jet with full tanks. At Canada 3000, our rule was flight planned burn + alternate + 30 minutes. If we took more than 300 kgs more than flight plan, we had explaining to do. On long flights (4+ hours), the extra fuel burn required to carry the extra fuel was just a wa...

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by Yikes!
Sun Dec 08, 2019 11:31 pm
Forum: Technical/Operations
Topic: What are the aircraft engines average life expectations compared to the aircraft itself ?
Replies: 32
Views: 6877

Re: What are the aircraft engines average life expectations compared to the aircraft itself ?

Air Canada had an aircraft where the engine had not been off the wing in 60,000+ hours, if I recall.

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by Yikes!
Fri Dec 06, 2019 5:13 am
Forum: Technical/Operations
Topic: This looks dangerous!
Replies: 28
Views: 6017

Re: This looks dangerous!

Perfectly OK as a balanced takeoff with 35' AGL being height at end of TORA.

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by Yikes!
Tue Dec 03, 2019 2:06 am
Forum: Technical/Operations
Topic: TCAS/ATC
Replies: 16
Views: 1399

Re: TCAS/ATC

https://www.skybrary.aero/index.php/T15 ... many,_2002

Eurocontrol prohibits air traffic controllers from overriding TCAS alerts. Possibly the same here in North America.
-->

This says it all:

https://www.skybrary.aero/index.php/T15 ... many,_2002

Eurocontrol prohibits air traffic controllers from overriding TCAS alerts. Possibly the same here in North America.

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by Yikes!
Sun Oct 13, 2019 1:16 am
Forum: Technical/Operations
Topic: Flight Crews Housed an Hour Away from Airport?
Replies: 41
Views: 13855

Re: Flight Crews Housed an Hour Away from Airport?

Could also mean they're on a 30+ hour layover.

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by Yikes!
Tue Oct 01, 2019 3:25 am
Forum: Technical/Operations
Topic: Clarification of 02 use by pilots above FL400
Replies: 22
Views: 3150

Re: Clarification of 02 use by pilots above FL400

Was on the flight deck of Concorde passing FL580 with only one pilot at the controls (the other, indisposed). Nobody, including Flt Eng on O2.

Their attitude? If we lose pressurization, we're all dead anyway. So why bother.

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by Yikes!
Tue Sep 03, 2019 4:38 am
Forum: Technical/Operations
Topic: Scenario Question: Unstable Approach
Replies: 19
Views: 2746

Re: Scenario Question: Unstable Approach

Airbus, Boeing, who-cares - at a pre-described height, either pilot calls "UNSTABLE - GO-AROUND" to which the PF responds by executing the GA procedure for that type.

No brainer.

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by Yikes!
Wed Jun 26, 2019 2:42 am
Forum: Technical/Operations
Topic: What happens to the broken parts on aircraft after accident investigation is done?
Replies: 28
Views: 4519

Re: What happens to the broken parts on aircraft after accident investigation is done?

It was always my understanding that if a part had survived an accident, it would never be used again in service. Could be wrong....

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by Yikes!
Wed Jun 26, 2019 2:40 am
Forum: Technical/Operations
Topic: Individual Wheel Load
Replies: 9
Views: 1774

Re: Individual Wheel Load

Suggest you look at ACN numbers and work from there. Airplane Classification Numbers are used in conjunction with PCN's (Pavement Classification Numbers) to determine if a given aircraft is too heavy to be supported by the local airport to which the PCN's apply.

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by Yikes!
Wed Jun 05, 2019 4:07 am
Forum: Technical/Operations
Topic: Hand flying commercial jets - routes
Replies: 50
Views: 7235

Re: Hand flying commercial jets - routes

With non-complex DP's and/or STAR's, there is no reason a flight cannot be hand flown other than passenger comfort limitations. More and more airlines are encouraging pilots to fly to top of climb and from top of descent to re-familiarize themselves with "flying the airplane" . With a comp...

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by Yikes!
Wed Jun 05, 2019 3:53 am
Forum: Technical/Operations
Topic: Why retract flaps on the ground?
Replies: 51
Views: 7923

Re: Why retract flaps on the ground?

AirKevin wrote:
One less thing for the ground crew to crash into if the flaps are retracted.


Precisely. Flaps damaged by impact of ground crew typically are more expensive to repair than trailing edges of flaps retracted.

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by Yikes!
Sun Apr 28, 2019 3:53 am
Forum: Technical/Operations
Topic: ILS Categories US Major Airports
Replies: 23
Views: 4253

Re: ILS Categories US Major Airports

Obviously not. Lots of overhead, infrastructure, and upkeep. Why bother when the weather is benign all the time. I live in Canada and the sheer number of airports in the US with CAT II/III ILS is enough to make us drool. There was a point not too long ago you could count the number of CAT III appro...

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by Yikes!
Fri Apr 26, 2019 2:26 am
Forum: Technical/Operations
Topic: Icelandair 757 question
Replies: 31
Views: 3821

Re: Icelandair 757 question

Just used the same website and it showed From KEF To SDQ Total: 3,829 mi 3,829 statute miles and 3,327 nautical miles are one and the same. Slightly different units. Guys, I realize it is the same distance. However, the 752's range should be around 3900nmi. Can she do it westbound with a reasonable...

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by Yikes!
Wed Apr 24, 2019 10:41 pm
Forum: Technical/Operations
Topic: Icelandair 757 question
Replies: 31
Views: 3821

Re: Icelandair 757 question

Just used the same website and it showed From KEF To SDQ

Total: 3,829 mi

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by Yikes!
Wed Apr 24, 2019 10:37 pm
Forum: Technical/Operations
Topic: Icelandair 757 question
Replies: 31
Views: 3821

Re: Icelandair 757 question

~3,900 n.m. BIKF to Santo Domingo. Tight but possible. Probably not economical due to reduced payload to take the extra fuel required. Tech stop in CYYT would greatly improve viability of routes to all Caribbean destinations. According to gcmap.com the great circle distance between KEF and SDQ is 3...

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by Yikes!
Mon Apr 22, 2019 3:59 pm
Forum: Technical/Operations
Topic: Icelandair 757 question
Replies: 31
Views: 3821

Re: Icelandair 757 question

~3,900 n.m. BIKF to Santo Domingo. Tight but possible. Probably not economical due to reduced payload to take the extra fuel required. Tech stop in CYYT would greatly improve viability of routes to all Caribbean destinations.

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by Yikes!
Tue Apr 09, 2019 10:56 pm
Forum: Technical/Operations
Topic: The Electric Beaver
Replies: 17
Views: 2071

Re: The Electric Beaver

Will believe it when I see it. Seems to be more of an ongoing April Fool's Joke than reality. If I have to eat my words, I prefer Ketchup vice mayonnaise....

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by Yikes!
Tue Apr 09, 2019 10:53 pm
Forum: Technical/Operations
Topic: IFE in 2019 - Huh?
Replies: 25
Views: 3628

Re: IFE in 2019 - Huh?

WPvsMW wrote:
More of a Travel forum topic. ???


Maybe not as IFE's are the vehicle by which most airlines deliver their safety briefings and passenger announcements (overriding IFE content).

False economy?

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by Yikes!
Tue Apr 09, 2019 10:50 pm
Forum: Technical/Operations
Topic: White painted Wings, are they allowed on airliners in the US?
Replies: 22
Views: 3484

Re: White painted Wings, are they allowed on airliners in the US?

And another thing learned recently. Aircraft paint contains microscopic aluminium to effectively make the paint a ground for the purposes of lightning strikes/static dispersion. If the paint is not applied properly or allowed to cure properly, the "conductivity test" can fail requiring rep...

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by Yikes!
Tue Apr 09, 2019 10:46 pm
Forum: Technical/Operations
Topic: White painted Wings, are they allowed on airliners in the US?
Replies: 22
Views: 3484

Re: White painted Wings, are they allowed on airliners in the US?

I thought that wings upper-side cannot be painted in dark colours for heat absorption-issues and UV radiation. It can be risky with the fuel tanks inside./ Not necessarily. For one thing, there are many high winged commuter aircraft where passengers cannot see the top of the wing. Turboprops rarely...

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by Yikes!
Sun Mar 24, 2019 6:02 am
Forum: Technical/Operations
Topic: Flying the Plane, versus systems management flying
Replies: 80
Views: 10794

Re: Flying the Plane, versus systems management flying

Not sure what you are trying to ask, but Extended Envelope Training, UPRT is upon the airline US airline industry effective this month. A significantly improved training program for all Part 121 operators. Low altitude, high altitude full stalls are a part of the program. There are advanced trainin...

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by Yikes!
Sun Mar 24, 2019 5:47 am
Forum: Technical/Operations
Topic: Polar ops on the 777
Replies: 24
Views: 3166

Re: Polar ops on the 777

I doubt that anyone uses the Universal tables anymore, even in the case of a a reroute on the NAT. After all, what could go wrong..... What could go wrong. Good question. EVERYTHING!!! I transited 90N about 5 years ago in a Dash 7. The FMS actually accepted 90N as a waypoint. It should not have, bu...

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by Yikes!
Sun Mar 17, 2019 6:14 am
Forum: Technical/Operations
Topic: Winglets On Older Jets
Replies: 9
Views: 1609

Re: Winglets On Older Jets

Winglet design (there are many) tend to reduce induced drag. Drag reduction = fuel savings. Boeing denied the concept for decades.

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by Yikes!
Mon Mar 04, 2019 4:13 am
Forum: Technical/Operations
Topic: Freezing Fuel?
Replies: 9
Views: 1523

Re: Freezing Fuel?

Most large heavies have a minimum temperature operating limit in the vicinity of -54 F. Given that the typical temperature rise due to ram air effect is about 15 degrees or more C, SAT's must be in the range of -70 F for the fuel to start to gel, making it hazardous to operate. Large airliners can e...

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by Yikes!
Sun Mar 03, 2019 7:10 am
Forum: Travel, Polls & Preferences
Topic: Lockheed and Douglas - Should they have built twinjets?
Replies: 32
Views: 4671

Re: Lockheed and Douglas - Should they have built twinjets?

During the time (late 60's/early 70's), wide bodies were a novelty - the only one in existence at the time was the 747. Given the state of engine design and the thinking of the time, a minimum of three engines was required for long-haul, oceanic flight. The race to industry lead Douglas to take shor...

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by Yikes!
Sun Feb 24, 2019 5:37 pm
Forum: Civil Aviation
Topic: Atlas Air 3591 Down in Trinity Bay, Texas
Replies: 1915
Views: 443849

Re: Atlas Air 3591 Down in Trinity Bay, Texas

... Flying in the vicinity of thunderstorms can cause severe turbulence, yes. But they do not bring down jetliners. They most certainly can and have done - Air France lost two hull less than 2 years apart due to thunderstorms and crewmember incompetence. Countless other windshear/microburst events ...

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by Yikes!
Fri Feb 15, 2019 6:21 am
Forum: Technical/Operations
Topic: Thrust reverse pushbacks still legal?
Replies: 16
Views: 3212

Re: Thrust reverse pushbacks still legal?

Have done it with the 757. Tried once with the 767 in an extreme situation - couldn't move an inch. Never tried it again.

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by Yikes!
Fri Feb 15, 2019 6:19 am
Forum: Technical/Operations
Topic: What is the exact definition of a "cycle?"
Replies: 14
Views: 1866

Re: What is the exact definition of a "cycle?"

A go-around without a landing is not a cycle. A circuit with at touchdown (landing) is considered a cycle.

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by Yikes!
Wed Jan 30, 2019 3:57 am
Forum: Technical/Operations
Topic: Single Pilot Passenger Jet Operations
Replies: 72
Views: 5758

Re: Single Pilot Passenger Jet Operations

Canada's RCMP uses single pilot, night IFR pilots of Pilatus single engine turboprops IN THE ARCTIC 24/7.

Just wait....

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by Yikes!
Mon Jan 28, 2019 2:52 am
Forum: Technical/Operations
Topic: El Al 747's Tel Aviv to Eilat??
Replies: 16
Views: 2433

Re: El Al 747's Tel Aviv to Eilat??

TLV-ETH M0.80/B757 ~ 55 minutes. Been there, done that.

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by Yikes!
Mon Jan 28, 2019 2:37 am
Forum: Technical/Operations
Topic: Single Pilot Passenger Jet Operations
Replies: 72
Views: 5758

Re: Single Pilot Passenger Jet Operations

Great question TTT but take it a step further and having no pilot on board. That's where our industry is heading. We're already seeing it with driverless vehicle testing. Next it will be cargo flights over the North Atlantic Tracks. Finally (long after I'm retired, thankfully) it will be passenger f...

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by Yikes!
Thu Jan 17, 2019 2:36 am
Forum: Technical/Operations
Topic: NAV database updates for airliners.
Replies: 43
Views: 3824

Re: NAV database updates for airliners.

As an aside, the update frequency is every 56 days and effective always at 0901Z on the first day of the cycle and on every system. Most boxes (FMS) have the capability of holding two updates - one that is active and one that is either coming into effect at a later date, or, if that new one hasn't ...

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by Yikes!
Thu Jan 17, 2019 2:28 am
Forum: Technical/Operations
Topic: Most expensive aircraft part
Replies: 39
Views: 8098

Re: Most expensive aircraft part

Notwithstanding the rules as determined by the thread author, the most expensive part of the airplane is the most variable part: Its crew. Everything, and I mean EVERYthing on board that aircraft depends on the crew operating it. Doesn't take much to write off an entire airframe. Look at Air France....

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