Search found 230 matches

by convair880mfan
Tue Oct 26, 2021 4:59 pm
Forum: Technical/Operations
Topic: Can flaps be used to slow an aircraft or only to allow it to fly safely at slower speeds?
Replies: 18
Views: 841

Can flaps be used to slow an aircraft or only to allow it to fly safely at slower speeds?

I have heard contradictory things about this. I know flaps create some drag while increasing lift and that the first flap settings creates a lot of lift for a small amount of drag compared to landing flap configurations relatively speaking. Reading up on this subject I have learned that flaps lower ...

Jump to post
by convair880mfan
Tue Oct 26, 2021 5:52 am
Forum: Technical/Operations
Topic: Is it dangerous when aircraft carry fuel in a center tank beneath the passenger cabin?
Replies: 27
Views: 1425

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

Thanks to everyone who responded. I learned a lot. Thinking about what the others have written here made me think that if center fuel tanks were dangerous, the FAA and the aviation authorities of other countries would not allow them in commercial aircraft. I am also thinking now that I am not aware ...

Jump to post
by convair880mfan
Mon Oct 25, 2021 9:12 pm
Forum: Technical/Operations
Topic: Is it dangerous when aircraft carry fuel in a center tank beneath the passenger cabin?
Replies: 27
Views: 1425

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

Is the fuel from the center fuel tank used first? If not, during a wheels up landing, is the center tank fuel the first to be jettisoned before landing? I wonder if center fuel tank fires have caused a lot of fatalities and injuries that would not have happened if fuel was only kept in the wing tank...

Jump to post
by convair880mfan
Mon Oct 25, 2021 7:21 pm
Forum: Technical/Operations
Topic: Is it dangerous when aircraft carry fuel in a center tank beneath the passenger cabin?
Replies: 27
Views: 1425

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

I've read about some airliners that carry fuel beneath the passenger cabin in order to give them added range. Is that dangerous, for example, in the event landing gear fails to extend and the plane is forced to make a belly landing. Also . . . do airliners that carry fuel in the horizontal stabilize...

Jump to post
by convair880mfan
Sun Oct 24, 2021 9:32 pm
Forum: Technical/Operations
Topic: Do Boeing 737 pilots use Flaps 1 or Flaps 10 very often?
Replies: 7
Views: 885

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

Thank you so much Snuffaluffgus.

That answers so many of my questions and was very clear and understandable. Thanks again!

Jump to post
by convair880mfan
Sun Oct 24, 2021 6:36 pm
Forum: Technical/Operations
Topic: Do Boeing 737 pilots use Flaps 1 or Flaps 10 very often?
Replies: 7
Views: 885

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

After watching many Boeing 737 videos taken from out of passenger windows, it seems like Boeing 737 pilots sometimes skip some of the settings during approach to landing. I have seen a picture of a 737 flap indicator with the following settings: 1, 2, 5, 10, 15, 25, 30 and 40. A retired 737-200 Capt...

Jump to post
by convair880mfan
Sun Oct 24, 2021 12:11 am
Forum: Technical/Operations
Topic: What was the most powerful PW JT8D engine ever used on a Boeing 737-100?
Replies: 4
Views: 623

What was the most powerful PW JT8D engine ever used on a Boeing 737-100?

Wikipedia is not considered to always be correct in its information. From this source if seems like the 737-100 could take even the highest thrust Pratt and Whitney JT8D engines [-17R] but I don't know if it really could take such engines. The 737-100 was not hugely popular and less than 100 were pr...

Jump to post
by convair880mfan
Sat Oct 23, 2021 4:51 pm
Forum: Technical/Operations
Topic: Video showing Convair 880 flap and speed brake operation
Replies: 2
Views: 545

Video showing Convair 880 flap and speed brake operation

https://youtu.be/g0bHp1fdwY0 This video of a cigarette commercial using clips of the Convair 880 and Boeing 707 has views of the Convair 880 flap operation, speed brake operation and a bit of air to air of a Convair 880 coming in to land for anyone interested. The Convair 880 hand vortex generators ...

Jump to post
by convair880mfan
Fri Oct 22, 2021 3:59 pm
Forum: Travel, Polls & Preferences
Topic: What defines a "long haul" flight?
Replies: 11
Views: 875

What defines a "long haul" flight?

Is there any kind of fixed definition of "long haul" when used of flights or is it a fluid concept?

Jump to post
by convair880mfan
Fri Oct 22, 2021 3:54 pm
Forum: Technical/Operations
Topic: Could MD-11's used domestically do without the winglets?
Replies: 21
Views: 1915

Re: Could MD-11's used domestically do without the winglets?

Would removing 900 pounds result in significant fuel savings on short stage lengths? Since the winglet is actually part of the wingtip, I would imagine that some other type of wingtip would need to replace it and that would weigh something too. Would a new wingtip need to go through the FAA approval...

Jump to post
by convair880mfan
Wed Oct 20, 2021 5:30 pm
Forum: Technical/Operations
Topic: Could MD-11's used domestically do without the winglets?
Replies: 21
Views: 1915

Could MD-11's used domestically do without the winglets?

When Japan Airliners and ANA used a domestic versions of the 747-400 called the 747-400D, they didn't use the winglets since the added weight didn't translate into cost savings on the short stage length missions of these aircraft with their brief cruise portions of flight. I'm wondering whether the ...

Jump to post
by convair880mfan
Wed Oct 20, 2021 5:20 pm
Forum: Technical/Operations
Topic: When pilots speak of a specific type of aircraft as "unforgiving" does that indicate a design flaw?
Replies: 2
Views: 777

When pilots speak of a specific type of aircraft as "unforgiving" does that indicate a design flaw?

I am not a pilot or engineer or anything like that. I've read some debates here on the Forums on various aircraft types described with the adjective "unforgiving." This is a term taken from morality, ethics and psychology and then used analogically of aircraft. When an aircraft is describe...

Jump to post
by convair880mfan
Wed Oct 20, 2021 1:32 am
Forum: Technical/Operations
Topic: Aircraft that are heavy on the controls or light?
Replies: 13
Views: 872

Re: Aircraft that are heavy on the controls or light?

GalaxyFlyer, how was the Lockeed C-5 Galaxy. Would be interesting in knowing how the artificial feel was on that great aircraft.

Jump to post
by convair880mfan
Tue Oct 19, 2021 6:52 pm
Forum: Technical/Operations
Topic: Aircraft that are heavy on the controls or light?
Replies: 13
Views: 872

Aircraft that are heavy on the controls or light?

Sometimes when reading Aviation Week and Space Technology Pilot Reports on various aircraft, the writers speak of pull and push forces on the yoke or rudder, for example, x aircraft required a 30 pound push force on the rudder pedals during an engine out landing approach. Those of you who are pilots...

Jump to post
by convair880mfan
Tue Oct 19, 2021 2:52 am
Forum: Technical/Operations
Topic: Any opinions on hydraulic fuses?
Replies: 4
Views: 655

Re: Any opinions on hydraulic fuses?

My bad. I should have been more specific. I am referring to situations where a failure, in one case of a defectively repaired rear pressure bulkhead on a Japan Air special Boeing 747 and in another case, the failure of a tail mounted engine component on a DC-10-10 resulted in damage to all the hydra...

Jump to post
by convair880mfan
Tue Oct 19, 2021 12:42 am
Forum: Technical/Operations
Topic: Any opinions on hydraulic fuses?
Replies: 4
Views: 655

Any opinions on hydraulic fuses?

A couple of tragedies occurred when all hydraulic fluid was lost. Japan Air 747 and United DC-10. Do all commercial types use hydraulic fuses or just some? What other systems are there to prevent the complete loss of hydraulic fluid after a catastrophic failure?

Jump to post
by convair880mfan
Fri Oct 15, 2021 11:27 pm
Forum: Technical/Operations
Topic: Does anyone know the flap settings for the Boeing 720 and which settings were used for t/o or landing
Replies: 0
Views: 320

Does anyone know the flap settings for the Boeing 720 and which settings were used for t/o or landing

I've done a key word search to no avail and tried looking at enlarged photos of B720 instrument panels . . . also to no avail. Perhaps there are some former 720 pilots who know or enthusiasts who have Flight or Operating Manuals. Grateful for any information!

Jump to post
by convair880mfan
Thu Oct 14, 2021 10:09 pm
Forum: Technical/Operations
Topic: Was this Boeing 707 takeoff dangerous or only appears so to a non-pilot?
Replies: 8
Views: 1923

Re: Was this Boeing 707 takeoff dangerous or only appears so to a non-pilot?

Thanks so much 113312. I really appreciate it! When I was a teenager I read a lot of books on how to be a flight engineer, how to ace the F/E test for the B727, tricks for passing the 727 F/E written exam and so on. I read them but did not study them, did not memorize them, did not take the practice...

Jump to post
by convair880mfan
Thu Oct 14, 2021 8:28 pm
Forum: Technical/Operations
Topic: Was this Boeing 707 takeoff dangerous or only appears so to a non-pilot?
Replies: 8
Views: 1923

Re: Was this Boeing 707 takeoff dangerous or only appears so to a non-pilot?

I'll have to look up those abbreviations, but I do appreciate your comments. I would think, and I could be wrong, that your numbers would have to be pretty accurate. What I mean is there seems to be little room for error if you underestimated your load, if your weight and balance was off or if you r...

Jump to post
by convair880mfan
Thu Oct 14, 2021 7:08 pm
Forum: Technical/Operations
Topic: Was this Boeing 707 takeoff dangerous or only appears so to a non-pilot?
Replies: 8
Views: 1923

Was this Boeing 707 takeoff dangerous or only appears so to a non-pilot?

https://youtu.be/_RKa0_Qr1s4
-->

I am not a pilot, so what appears to be a real "nail biter" might be completely normal. What do you pilots think of this video. It does provide a nice view of a standing takeoff .https://youtu.be/_RKa0_Qr1s4

Jump to post
by convair880mfan
Tue Oct 12, 2021 6:19 pm
Forum: Travel, Polls & Preferences
Topic: For pilots: Was the DC-10 a joy to fly?
Replies: 7
Views: 2054

Re: For pilots: Was the DC-10 a joy to fly?

CosmicCruiser,
I am not quite sure what you mean by "sluggish" when referring to the controls on the MD-10 [DC-10]. Do you mean the rudders, ailerons and speed brakes were slower to respond to your control inputs than the controls of the MD-11?. Sorry I am not a pilot.

Jump to post
by convair880mfan
Mon Oct 11, 2021 3:52 pm
Forum: Travel, Polls & Preferences
Topic: For pilots: Was the DC-10 a joy to fly?
Replies: 7
Views: 2054

For pilots: Was the DC-10 a joy to fly?

As a passenger, I always enjoy my flights on the DC-10-10 and the DC-10-30. Not sure how many DC-10/MD-10 pilots are on the Forums, but I was wondering whether pilots enjoyed flying it?

Jump to post
by convair880mfan
Mon Oct 11, 2021 3:44 am
Forum: Travel, Polls & Preferences
Topic: Your favorite plane that you haven't flown on
Replies: 25
Views: 1230

Re: Your favorite plane that you haven't flown on

Convair 880 or 880M
Concorde

Jump to post
by convair880mfan
Sun Oct 10, 2021 8:32 pm
Forum: Technical/Operations
Topic: Does a jetliner need to be taken out of service after one of its engines suffers a compressor stall?
Replies: 2
Views: 914

Does a jetliner need to be taken out of service after one of its engines suffers a compressor stall?

I hate to be at the mercy of Wikipedia here. I am guessing that a compressor stall in an engine due to a bird strike would require an inspection after landing. What about other types of compressor stalls? It seems like there are degrees of seriousness involved involving duration, EGT limits and so o...

Jump to post
by convair880mfan
Sun Oct 10, 2021 7:48 pm
Forum: Travel, Polls & Preferences
Topic: Optical illusions of flight
Replies: 3
Views: 321

Optical illusions of flight

My first flight in a Boeing 707 occurred when I was a college student studying physics, so it was a very special experience for me. As the aircraft lifted off the ground, our plane felt motionless and it appeared that it was the earth that was falling away from us at an angle. During the first turn ...

Jump to post
by convair880mfan
Sat Oct 09, 2021 11:50 pm
Forum: Travel, Polls & Preferences
Topic: Anyone been on a DC8 when there was one seat row per window?
Replies: 2
Views: 786

Anyone been on a DC8 when there was one seat row per window?

The original DC8 had generous seat pitch such that for every row of seats there was one large window. Economics eventually caused airlines to pack more and more seats in the DC8 but I wonder if there are any old timers out there who flew on the DC8 when the passenger compartment was configured with ...

Jump to post
by convair880mfan
Sat Oct 09, 2021 5:59 pm
Forum: Technical/Operations
Topic: Could flap operation be automated?
Replies: 18
Views: 1720

Could flap operation be automated?

I was wondering about this since flap movement is tied to variables like weight and speed. Could flight deck automation remove from pilots the task of lowering and raising flaps based on aircraft configuration?

Jump to post
by convair880mfan
Sat Oct 09, 2021 3:30 am
Forum: Technical/Operations
Topic: What exactly is a "short final"?
Replies: 11
Views: 2207

What exactly is a "short final"?

There is a lot of conflicting information out there on the internet. Is there some kind of "official" definition? A commercial pilot told me that the airlines prefer long straight-in approaches. Is a short final sort of the antithesis of this?

Jump to post
by convair880mfan
Wed Oct 06, 2021 12:32 am
Forum: Travel, Polls & Preferences
Topic: Your shortest flight on a widebody and longest flight on a narrowbody
Replies: 105
Views: 4321

Re: Your shortest flight on a widebody and longest flight on a narrowbody

Shortest widebody flights:

TWA 747-100 St. Louis to NY JFK Airport
United 747-400 Denver to Los Angeles International Airport

Not sure about the lonest narrow body flights I've been on.

Jump to post
by convair880mfan
Tue Oct 05, 2021 5:34 pm
Forum: Travel, Polls & Preferences
Topic: "The Boeing 880" Create your own nickname for an airliner.
Replies: 3
Views: 213

"The Boeing 880" Create your own nickname for an airliner.

Airliners have nicknames but it might be fun to make up our own. I always thought a good nickname for the Boeing 720 would be the Boeing 880 since it was created in part as an answer to the Convair 880. What nickname would you give to an airliner you know of?

Jump to post
by convair880mfan
Tue Oct 05, 2021 5:17 pm
Forum: Technical/Operations
Topic: Dual spool compressors vs. variable stator compressors
Replies: 7
Views: 1131

Re: Dual spool compressors vs. variable stator compressors

Thanks to all members who helped provide information. How interesting that the PW4000 has variable incidence guide vanes in addition to the variable incidence stators. Isn't jet propulsion technology amazing. A friend sent me some information on the CFM56-3 engine. It also has variable incidence sta...

Jump to post
by convair880mfan
Tue Oct 05, 2021 6:04 am
Forum: Technical/Operations
Topic: Dual spool compressors vs. variable stator compressors
Replies: 7
Views: 1131

Re: Dual spool compressors vs. variable stator compressors

I had found some information on the internet but am having difficulty locating information about variable-incidence stator use on the jet engines of various airliners after the Boeing 707 and Convair 880. In a Forum called PPRuNe, a writer states that the JT9D of Pratt and Whitney utilized some vari...

Jump to post
by convair880mfan
Tue Oct 05, 2021 12:44 am
Forum: Technical/Operations
Topic: Dual spool compressors vs. variable stator compressors
Replies: 7
Views: 1131

Dual spool compressors vs. variable stator compressors

I think Pratt and Whitney and General Electric had two different jet engine compressor designs to prevent transients and stalling of the compressors during certain conditions. If I am not mistaken, GE used variable-incidence stators on the engines on the Convair 880 while Pratt and Whitney used twin...

Jump to post
by convair880mfan
Tue Oct 05, 2021 12:27 am
Forum: Technical/Operations
Topic: During a standing takeoff on a water-injected aircraft like the early 707, when does the water start?
Replies: 17
Views: 2361

Re: During a standing takeoff on a water-injected aircraft like the early 707, when does the water start?

Did the C-5 Galaxy need water to takeoff or were all of its takeoffs dry? I'm suspecting that it didn't need water since for an aircraft of that size, it didn't need all that much runway to get off the ground. But perhaps I am wrong.

Jump to post
by convair880mfan
Mon Oct 04, 2021 11:43 pm
Forum: Technical/Operations
Topic: How many miles before touchdown are final landing flaps selected?
Replies: 5
Views: 705

How many miles before touchdown are final landing flaps selected?

Is there a standard or average distance or does it vary by aircraft or conditions? If it varies by aircraft type, what is the average for your aircraft or is there no average? Thanks for any information in either miles or kilometers.

Jump to post
by convair880mfan
Mon Oct 04, 2021 11:38 pm
Forum: Technical/Operations
Topic: During a standing takeoff on a water-injected aircraft like the early 707, when does the water start?
Replies: 17
Views: 2361

During a standing takeoff on a water-injected aircraft like the early 707, when does the water start?

Does the water start when the thrust levers are advanced to a certain point or does it start when the aircraft begins rolling. I have been on 707's where standing takeoffs were made with water injection. Sometimes the 707 would wait like 30 seconds before the roll. Is water being used during this ti...

Jump to post
by convair880mfan
Sun Oct 03, 2021 4:42 am
Forum: Technical/Operations
Topic: Were Pratt & Whitney JT8D bird strike engine shurtdowns rare?
Replies: 0
Views: 543

Were Pratt & Whitney JT8D bird strike engine shurtdowns rare?

I've heard a lot about bird strike engine shutdowns on GE and CFM engines as well as larger Pratt & Whitney engines. Not sure about Rolls Royce engines. I can't remember hearing of bird strikes on P&W JT8D engines that caused engine shutdowns. I know hail brought down a DC-9 powered by P&...

Jump to post
by convair880mfan
Sat Oct 02, 2021 11:11 pm
Forum: Technical/Operations
Topic: Which airliners are able to use APU while airborne?
Replies: 10
Views: 1550

Re: Which airliners are able to use APU while airborne?

Did the Lockheed C5 Galaxy have an APU and could it be used in flight, GalaxyFlyer?

Jump to post
by convair880mfan
Sat Oct 02, 2021 9:48 pm
Forum: Technical/Operations
Topic: Which airliners are able to use APU while airborne?
Replies: 10
Views: 1550

Which airliners are able to use APU while airborne?

According to author Jim Upton in his book, "Lockheed L-1011 Tristar" : "Providing ground self-sufficiency and emergency in-flight power, the (L-1011) APU system is operable up to an altitude of 30,000 feet under all flight conditions within the aircraft operation envelope." (1) A...

Jump to post
by convair880mfan
Sat Oct 02, 2021 9:05 pm
Forum: Travel, Polls & Preferences
Topic: "Landing in a telephone booth"
Replies: 0
Views: 405

"Landing in a telephone booth"

Once back in the day while riding aboard a Southwest Airlines 737-200 from ABQ to PHX, the plane made an extremely "firm" landing and when reverse thrust was applied, I felt being pulled very, very hard against my seatbelt. I even had to brace myself against the backrest of the seat in fro...

Jump to post
by convair880mfan
Sat Oct 02, 2021 5:17 am
Forum: Technical/Operations
Topic: In a circling approach, how much of a straight path is required before landing.
Replies: 20
Views: 1482

Re: In a circling approach, how much of a straight path is required before landing.

GalaxyFlyer, Regarding visual approaches . . . How does that work? Does the aircraft request it and then need approval from ATC? Does ATC suggest it? I know there are published visual approaches like the one into DCA. I am not aware of any published visual approaches for Albuquerque although the wea...

Jump to post
by convair880mfan
Fri Oct 01, 2021 6:37 pm
Forum: Technical/Operations
Topic: In a circling approach, how much of a straight path is required before landing.
Replies: 20
Views: 1482

In a circling approach, how much of a straight path is required before landing.

Can an airliner follow an arc all the way to the runway threshold? I was on a return flight once to my hometown and the MD-80 I was on only lined up with the runway for about 11 seconds before it crossed the threshold. When the wings were level it was just 11 seconds. Are there any rules or protocol...

Jump to post
by convair880mfan
Fri Oct 01, 2021 5:39 am
Forum: Technical/Operations
Topic: How soon after takeoff can an airliner safely start a turn?
Replies: 24
Views: 2163

Re: How soon after takeoff can an airliner safely start a turn?

I wonder how the 400 figure was arrived at? How long is an aircraft in ground effect after takeoff? I wouldn't imagine its very long at those speeds. At 500 agl do you do a 30 degree turn or 15 %.

Jump to post
by convair880mfan
Fri Oct 01, 2021 4:34 am
Forum: Technical/Operations
Topic: If snubbers failed to stop wheel rotation during retraction, would this adversely affect the airplane?
Replies: 8
Views: 1249

If snubbers failed to stop wheel rotation during retraction, would this adversely affect the airplane?

Or would they just continue spinning until they decelerated on their own in their wheel wells? Would the spinning wheels engendered by failed snubbers create a gyroscopic force on the aircraft. I've never read of snubbers failing. Maybe they are too simple to fail. I collect aircraft manual and have...

Jump to post
by convair880mfan
Fri Oct 01, 2021 4:27 am
Forum: Technical/Operations
Topic: How soon after takeoff can an airliner safely start a turn?
Replies: 24
Views: 2163

How soon after takeoff can an airliner safely start a turn?

Is it 400ft.agl? Or can an airliner start turning right after the gear is retracted? Back in the day in Albuquerque I could count to 60 before watching a 707 or 880 begin a turn. Later as a passenger on Southwest Airlines' 737-200s I could usually count to 20 before the aircraft turned. In both of t...

Jump to post
by convair880mfan
Fri Oct 01, 2021 12:49 am
Forum: Technical/Operations
Topic: Why do ailerons and speed brake panels become so active during the approach phase of flight?
Replies: 14
Views: 1177

Re: Why do ailerons and speed brake panels become so active during the approach phase of flight?

Does the weight and momentum of the larger jet transports have something to do with their stability during approach and landing? A library donated all their issues of Aviation Week and Space Technology magazines to me when the library decided to go digital. I've dug up an old AW&ST pilot report ...

Jump to post