Search found 268 matches

by Redbellyguppy
Sun May 01, 2022 5:48 am
Forum: Technical/Operations
Topic: Operating costs: 2x A321XLR vs 1 widebody
Replies: 14
Views: 2588

Re: Operating costs: 2x A321XLR vs 1 widebody

Remember, you have to buy the things, too. The cost of [email protected] Is less than [email protected]/330neo

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by Redbellyguppy
Fri Apr 08, 2022 3:02 pm
Forum: Technical/Operations
Topic: Biz Jets: VNAV and Flight Level Change
Replies: 18
Views: 2405

Re: Biz Jets: VNAV and Flight Level Change

These comments are based on 737 vnav but other aircraft are similar. Much of the time, the vnav functions identically to level change. During periods of unrestricted climb, vnav speed is max climb thrust, speed bug as set by the fmc. Only to meet a restriction does it enter a path mode. Similarly in...

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by Redbellyguppy
Sun Mar 27, 2022 6:04 am
Forum: Technical/Operations
Topic: A320 pushes nose down in flare mode
Replies: 12
Views: 3079

Re: A320 pushes nose down in flare mode

To smoothly land my aircraft, a 737, you have to gently de-rotate to sort of skip the mains on as you touch down. The net effect is the same as you pull the side stick to counter the nose down trim application. It results in nice landings. Yes I’m typed in both the a320 and 737.

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by Redbellyguppy
Sun Mar 27, 2022 1:31 am
Forum: Technical/Operations
Topic: airplane gliding
Replies: 43
Views: 4992

Re: airplane gliding

If I’m descending into, say, Sacramento, on a flight from Seattle, from FL400 I’ll pull the thrust to idle over Redding, or thereabouts. If I do it properly and ATC has no traffic issues, I wouldn’t need to apply thrust until I’m at 1000 ft… and only that because of the drag from configuring. If I h...

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by Redbellyguppy
Fri Mar 25, 2022 4:14 am
Forum: Technical/Operations
Topic: Delta - payroll optimized luggage/overhead question
Replies: 7
Views: 2374

Re: Delta - payroll optimized luggage/overhead question

A bag in the overhead weighs nothing, since it is built into the weight of a passenger, but in the pit it counts as a bag and weighs somewhere around 30 pounds depending on what their average weight program weights are.

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by Redbellyguppy
Sat Feb 26, 2022 3:37 pm
Forum: Technical/Operations
Topic: Engines for the Hawaii Hopper Flights
Replies: 5
Views: 2356

Re: Engines for the Hawaii Hopper Flights

The 737s flying inter island can stay in Hawaii for at the most, ten days. They have to return to the mainland for service checks because their operator does not have actual company maintenance out in Hawaii and contract maintenance can’t do all the maintenance needed to keep those aircraft out ther...

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by Redbellyguppy
Wed Jan 26, 2022 5:06 pm
Forum: Technical/Operations
Topic: Pilot retracted flaps one notch just before landing
Replies: 19
Views: 4324

Re: Pilot retracted flaps one notch just before landing

I suppose it might depend on what you considered “just before touchdown”. In the 737 it could be possible that I planned for, loaded, briefed, flaps 30. Then because of an unexpected tailwind, atc, etc, I was high and/or fast. I could drop flaps 40 to have the drag to repair that. But since my numbe...

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by Redbellyguppy
Sun Dec 19, 2021 3:02 am
Forum: Technical/Operations
Topic: 737 MAX APU Inlet Door
Replies: 30
Views: 3872

Re: 737 MAX APU Inlet Door

The inlet design was taken from the 787 design. Airflow around the new tail one design.

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by Redbellyguppy
Sun Dec 19, 2021 2:59 am
Forum: Technical/Operations
Topic: 737 MAX APU Inlet Door
Replies: 30
Views: 3872

Re: 737 MAX APU Inlet Door

The in flight open position is only 17 degrees vs the 45 degrees you see on the ground when watching our planes from the terminal. Ordinarily the apu is used only in flight as directed by mel or Qrh. However, we also run it continuously on departure during etops flights, it is running as a third ele...

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by Redbellyguppy
Wed Dec 15, 2021 7:27 am
Forum: Technical/Operations
Topic: Can anyone identify the various noises on this video of a B737 horiz stab jackscrew in operation?
Replies: 3
Views: 795

Re: Can anyone identify the various noises on this video of a B737 horiz stab jackscrew in operation?

I’m not sure what the groaning sound in the middle was but the final sound was created by the actuation of the jack screw past the limit of electrical trim, by the trim wheel being manually cranked to zero by someone in the cockpit.

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by Redbellyguppy
Mon Dec 13, 2021 4:47 pm
Forum: Technical/Operations
Topic: Turbofan Engine Shutdown Question
Replies: 12
Views: 2923

Re: Turbofan Engine Shutdown Question

The drag from a spinning prop is tantamount to having a disc of plywood out there that you’re pushing through the air. On a small aircraft the proportion of frontal area that said prop takes is much greater than the equivalent frontal area of a jet. The free spinning N1 also has a lot of drag, but p...

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by Redbellyguppy
Wed Dec 01, 2021 8:15 am
Forum: Technical/Operations
Topic: Why HAL3 went north before going back down to HNL?
Replies: 7
Views: 2095

Re: Why HAL3 went north before going back down to HNL?

You can fly lat long fixes to Hawaii. I’ve done it to go north of A track.

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by Redbellyguppy
Sun Nov 14, 2021 1:19 am
Forum: Technical/Operations
Topic: Why fuel driven actuators?
Replies: 14
Views: 1975

Re: Why fuel driven actuators?

I once flew an aircraft that had pneumatically actuated thrust reversers. There’s an infinite supply of air, too, in an engine that is running.

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by Redbellyguppy
Wed Oct 27, 2021 8:14 am
Forum: Technical/Operations
Topic: Is it dangerous when aircraft carry fuel in a center tank beneath the passenger cabin?
Replies: 43
Views: 3863

Re: Is it dangerous when aircraft carry fuel in a center tank beneath the passenger cabin?

You’re only going to get 17000 lb onto a 737 if you can’t use your center tanks, out of a potential capacity around 46,000 lb.

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by Redbellyguppy
Mon Oct 25, 2021 4:13 pm
Forum: Technical/Operations
Topic: Do Boeing 737 pilots use Flaps 1 or Flaps 10 very often?
Replies: 11
Views: 2937

Re: Do Boeing 737 pilots use Flaps 1 or Flaps 10 very often?

Only in the classic. The NG won’t honk at you flaps 10. I use it frequently when I want to descend at a decent rate but not use speed brakes.

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by Redbellyguppy
Mon Oct 25, 2021 3:57 pm
Forum: Technical/Operations
Topic: Do Boeing 737 pilots use Flaps 1 or Flaps 10 very often?
Replies: 11
Views: 2937

Re: Do Boeing 737 pilots use Flaps 1 or Flaps 10 very often?

Only in the classic. The NG won’t honk at you flaps 10. I use it frequently.

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by Redbellyguppy
Wed Oct 20, 2021 5:22 pm
Forum: Technical/Operations
Topic: Rationale for unusual SYD-YVR routing
Replies: 7
Views: 1583

Re: Rationale for unusual SYD-YVR routing

Fly to the wind to ride the wind.

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by Redbellyguppy
Sat Oct 02, 2021 5:50 am
Forum: Technical/Operations
Topic: Which airliners have ram air turbines. Which power hydraulics and which provide electricity?
Replies: 46
Views: 4963

Re: Which airliners have ram air turbines. Which power hydraulics and which provide electricity?

737 has cables going to flight controls, actuated by a person. These people powered generators consume cheap coffee and garbage airport food. One of the greatest misconceptions in aviation. 737 has cables to the hydraulic fight flight control actuators, with manual reversion in some instances. Whil...

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by Redbellyguppy
Thu Sep 30, 2021 8:18 am
Forum: Technical/Operations
Topic: Which airliners have ram air turbines. Which power hydraulics and which provide electricity?
Replies: 46
Views: 4963

Re: Which airliners have ram air turbines. Which power hydraulics and which provide electricity?

737 has cables going to flight controls, actuated by a person. These people powered generators consume cheap coffee and garbage airport food.

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by Redbellyguppy
Mon Sep 27, 2021 7:39 pm
Forum: Technical/Operations
Topic: Is it true that the American 191 and Air Florida 90 accidents could have been averted if the pilots had added power?
Replies: 16
Views: 2818

Re: Is it true that the American 151 and Air Florida 90 accidents could have been averted if the pilots had added power?

Air Florida had thrust to spare but what the DC10 really could have used was a few knots more airspeed. If they hadn’t been so dead nuts precisely pitching to V2 that wing wouldn’t have stalled.

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by Redbellyguppy
Sat Sep 11, 2021 9:33 pm
Forum: Technical/Operations
Topic: Question about 737 BBJ2.
Replies: 6
Views: 1517

Re: Question about 737 BBJ2.

What is the fuel capacity of this aircraft?

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by Redbellyguppy
Thu Sep 02, 2021 1:11 pm
Forum: Technical/Operations
Topic: OGG Runway strength - PCN/ACN
Replies: 3
Views: 1311

Re: OGG Runway strength - PCN/ACN

Hmm. I’ve been over 170 dual wheel. I’ll ask next time.

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by Redbellyguppy
Thu Sep 02, 2021 1:08 pm
Forum: Technical/Operations
Topic: N1 creeping up in climb 737NG
Replies: 9
Views: 2102

Re: N1 creeping up in climb 737NG

That’s how it works in real life.

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by Redbellyguppy
Fri Aug 20, 2021 4:03 pm
Forum: Technical/Operations
Topic: A320 Wingtip strobes
Replies: 19
Views: 2793

Re: A320 Wingtip strobes

If I choose to exercise courtesy about my strobe usage, it isn’t so much the wingtip strobes I’m being courteous about. It’s the tail strobe, which is right in the face at eye level of the crew behind us.

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by Redbellyguppy
Sat Aug 07, 2021 4:09 am
Forum: Technical/Operations
Topic: MPH student shifting into aviation
Replies: 11
Views: 1501

Re: MPH student shifting into aviation

Go take a demo flight. I doubt it’s too late for you if you have the heart for it.

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by Redbellyguppy
Thu Jul 29, 2021 5:01 pm
Forum: Technical/Operations
Topic: Welding in the main gear well ?
Replies: 11
Views: 1761

Re: Welding in the main gear well ?

Almost certainly a LED headlamp.

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by Redbellyguppy
Wed Jun 23, 2021 4:55 pm
Forum: Technical/Operations
Topic: Engine noise question
Replies: 22
Views: 3457

Re: Engine noise question

Sounds like you were overflown by an a220 or an a320 going to flaps 1

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by Redbellyguppy
Sat Jun 05, 2021 5:42 pm
Forum: Civil Aviation
Topic: Rare video of Anacostia river approach RWY 19 DCA
Replies: 23
Views: 6725

Re: Rare video of Anacostia river approach RWY 19 DCA

It would be hard to make stable approach requirements doing a late turn like that.

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by Redbellyguppy
Wed Jun 02, 2021 9:01 pm
Forum: Travel, Polls & Preferences
Topic: Is there a way to see how full Southwest's flights are?
Replies: 7
Views: 1824

Re: Is there a way to see how full Southwest's flights are?

Of course there is. If you work for southwest.

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by Redbellyguppy
Tue Jun 01, 2021 5:09 am
Forum: Technical/Operations
Topic: For Pilots: What Is Your Favorite Route/Flight Story?
Replies: 21
Views: 6054

Re: For Pilots: What Is Your Favorite Route/Flight Story?

I really like landing at kpwm. From the west you descend to fly over Portland head light house. You head out over the Casco bay, around Ft Gorges and down the mouth of Portland harbor. It becomes the Fore river and as it curves around it deposits you right on the extended centerline of runway 29. If...

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by Redbellyguppy
Tue May 25, 2021 3:26 am
Forum: Technical/Operations
Topic: How common is significant over fueling?
Replies: 15
Views: 3129

Re: How common is significant over fueling?

Rare. Usually it only occurs because of a late tail swap.

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by Redbellyguppy
Sun May 23, 2021 3:17 pm
Forum: Technical/Operations
Topic: Passenger Seat Belt Types 1960s/early 1970s
Replies: 3
Views: 1685

Re: Passenger Seat Belt Types 1960s/early 1970s

I’ve seen push to release on certain aircraft seatbelts that also had an airbag installed.

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by Redbellyguppy
Fri May 21, 2021 6:16 pm
Forum: Technical/Operations
Topic: Inflight Oscillation at Cruise
Replies: 15
Views: 3590

Re: Inflight Oscillation at Cruise

Happy times flying am autopilot deferred aircraft when I was at the regionals. The ambitious flight attendants were the worst, and especially when they had a lot of moment..

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by Redbellyguppy
Wed Apr 07, 2021 8:11 pm
Forum: Technical/Operations
Topic: Boeing 777 door locks
Replies: 3
Views: 2197

Re: Boeing 777 door locks

Don’t confused “locked” with “properly closed”. The 777 does have main door locks that engage at 80 knots. On my 737 I have micro switches that tell me the door is properly closed but the only openings that are “locked” are the overwing exits when we have at least 50% N2 and at least three doors are...

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by Redbellyguppy
Fri Apr 02, 2021 10:46 pm
Forum: Technical/Operations
Topic: Why do all new-build cargo aircraft have lower deck cargo areas?
Replies: 10
Views: 2966

Re: Why do all new-build cargo aircraft have lower deck cargo areas?

That cabin floor contributes a lot of structural integrity to the aircraft...

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by Redbellyguppy
Fri Mar 12, 2021 4:27 am
Forum: Technical/Operations
Topic: Door Latch Question
Replies: 18
Views: 2794

Re: Door Latch Question

Air loads move the handle to an aerodynamically neutral position. There won’t be any indication in the cockpit if the door is otherwise properly closed. Thee won’t be unusual noise or pressurization issues. An exterior handle is not a no-go item for that operator.

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by Redbellyguppy
Fri Mar 05, 2021 3:52 pm
Forum: Technical/Operations
Topic: Can the IRS be aligned in an hangar?
Replies: 7
Views: 1621

Re: Can the IRS be aligned in an hangar?

Sure. The earth still spins under a hangar.

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by Redbellyguppy
Mon Nov 09, 2020 6:50 am
Forum: Civil Aviation
Topic: JAC (Jackson Hole Airport, WY) to close April-June 2022
Replies: 62
Views: 14566

Re: JAC (Jackson Hole Airport, WY) to close April-June 2022

I remember using a parallel taxiway as a runway at rsw, oak... too bad that couldn’t happen at jac

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by Redbellyguppy
Wed Nov 04, 2020 2:31 am
Forum: Technical/Operations
Topic: C919- purple splotch on the flaps?
Replies: 10
Views: 2324

Re: C919- purple splotch on the flaps?

Interesting reflection of the hangar lights in the FO side window...

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by Redbellyguppy
Tue Nov 03, 2020 7:39 am
Forum: Technical/Operations
Topic: Why do some DC-9s have this extension piece on the cowling?
Replies: 17
Views: 3524

Re: Why do some DC-9s have this extension piece on the cowling?

Some of the NWA dc9 engines started their lives on United 732s maybe that has something to do with it.

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by Redbellyguppy
Sun Oct 18, 2020 5:24 am
Forum: Civil Aviation
Topic: Southwest Crew Base in Hawaii?
Replies: 77
Views: 12641

Re: Southwest Crew Base in Hawaii?

The longest flight is hnl-ito. About 35 minutes. The turn times are all at least 50 minutes if not longer. We routinely downs lire time in the ground then we do flying, out there. During covid cancelations of flights from San, Smf, sjc... there was lots and lots of deadheading. Dozing for dollars is...

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by Redbellyguppy
Mon Oct 12, 2020 2:22 pm
Forum: Technical/Operations
Topic: In your airline, do you start the APU upon landing?
Replies: 23
Views: 5134

Re: In your airline, do you start the APU upon landing?

I typically start the apu as part of my after landing flow... flaps up, start apu, start switches off, unnecessary lights off, window heat off, auto brakes off, call operations... by the time it has been started and warmed up for a minute, we are often reasonably close to the gate. Packs on apu blee...

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by Redbellyguppy
Sat Oct 10, 2020 6:03 pm
Forum: Technical/Operations
Topic: Simulators and Spatial Disorientation
Replies: 13
Views: 2245

Re: Simulators and Spatial Disorientation

I bargain with the check airmen... please take us off motion when we exit the runway snd I promise I won’t puke at the gate...

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by Redbellyguppy
Fri Oct 09, 2020 5:25 am
Forum: Technical/Operations
Topic: Simulators and Spatial Disorientation
Replies: 13
Views: 2245

Re: Simulators and Spatial Disorientation

It’s quite real in the air. But taxiing... ugh. Vomitado. That was the worst part of all of my type ratings.... taxiing.

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by Redbellyguppy
Fri Sep 25, 2020 12:48 am
Forum: Technical/Operations
Topic: What happens if you don't stab trim an aircraft
Replies: 11
Views: 2371

Re: What happens if you don't stab trim an aircraft

On the 737 there are certain conditions where the aircraft will apply some trim for you. And, this is exclusive of anything MCAS on the Max. If you remain at takeoff trim the whole flight... between 4-7 units in an 800 depending on weight and flap setting... the elevator control pressures will be -v...

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by Redbellyguppy
Wed Sep 23, 2020 10:07 pm
Forum: Technical/Operations
Topic: Commonality between the 737 Original and 737NG?
Replies: 29
Views: 5541

Re: Commonality between the 737 Original and 737NG?

I’m sure there’s some things that are the same. Maybe the windshield glass. Maybe the passenger window panes. Maybe the radome.

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by Redbellyguppy
Tue Sep 15, 2020 4:10 pm
Forum: Technical/Operations
Topic: Off position for landing gear handle
Replies: 24
Views: 5490

Re: Off position for landing gear handle

Off depressurizes the actuators. Non-max 737s have “off” and they do not have gear doors.

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