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92 votes
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Why does this 757 have a propeller engine attached to the fuselage?

From the description below the image you linked: The Honeywell, Boeing 757 test bed appeared on static display for a few days before departing half way through the event. A testbed aircraft is an ...
Federico's user avatar
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46 votes

Why does this 757 have a propeller engine attached to the fuselage?

The airplane doesn't "need" that engine. It is a test platform for testing the engine during flight. Obviously, you don't want to rely on the engine you're testing, in case something goes wrong! So ...
abelenky's user avatar
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29 votes
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Did I witness an engine test for a 757 at MAN?

See this avherald report: https://avherald.com/h?article=4db1ccdb&opt=1 A Jet2.com Boeing 757-200, registration G-LSAN performing a test flight from Manchester,EN to Manchester,EN (UK), was in ...
Sanchises's user avatar
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26 votes
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What is this tube connected to a 757 for?

What Mike said is correct, but I thought I'd add a little more. The hose is technically called the "PCA Hose" which stands for Pre-Conditioned Air Hose. The hose supplies pre-conditioned air to the ...
OSUZorba's user avatar
  • 2,639
26 votes
Accepted

What is the purpose of quickly moving the speedbrake lever on the 757 during rollout?

On B757, B767, B777, retracting the speed brakes during the landing roll is a technique some pilots use to disarm the Auto Brakes. I haven’t flown the other Boeings, but they probably also work this ...
Mike Sowsun's user avatar
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25 votes
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Why did Boeing never replace the 757?

The gap happened because the 737MAX wasn’t part of the original plan. The 767 and 757 shared a type rating and a lot of common parts, and orders had dried up for both, so they didn’t have much choice ...
StephenS's user avatar
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19 votes

Why does this 757 have a propeller engine attached to the fuselage?

Testing a new engine design can only go so far on the ground. At some point, it has to be tested in conditions representative of actual use - in other words, in flight. You don't want to be dependent ...
Anthony X's user avatar
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19 votes
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Why didn't the Boeing 757 share the 767 fuselage?

Boeing had already a fuselage for the 757 that fit the bill. It came originally from the 707 via the 727. To accommodate more baggage, the rear fuselage was deeper, as on the 737. During development ...
Peter Kämpf's user avatar
16 votes
Accepted

Do all 767-200s have speedbrakes that deploy automatically upon touchdown?

All B757 and B767 aircraft have speedbrakes that can be deployed automatically. But you need to manually arm them first. You also need weight on wheels(truck tilt) and both thrust levers at idle, ...
Mike Sowsun's user avatar
  • 37.8k
10 votes

What is the length of an A380 aileron?

A good source of public information is the aircraft characteristics document that the manufacturers typically publish for each model, including the A380. A scale planform drawing can be found on page ...
fooot's user avatar
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9 votes

Did I witness an engine test for a 757 at MAN?

What you describe sounds exactly like compressor surges following an engine failure of some sort (e.g. a bird strike during takeoff.) Here's a video of exactly that happening with a 757 at Manchester (...
reirab's user avatar
  • 19.5k
8 votes

Why is the Boeing 757 undercarriage so high?

Rotation angle at takeoff is often the limiting factor in gear height. The 757-300 is 178ft long, 30ft longer than the Airbus 321 which also has tall landing gear. The first 737s were less than 100ft ...
Pilothead's user avatar
  • 20.2k
7 votes

Why did Boeing never replace the 757?

The 737 MAX 10 is the replacement, for now. It almost matches the 757-200 on capacity (230 vs 240) and the 757-300 on range (3300 vs 3400 nmi), while staying considerably lighter and cheaper, due to ...
Therac's user avatar
  • 27.4k
7 votes

Would ground effect and FOD ingestion be factors at high speeds close to the ground?

The amount of time a plane in a dive spends close enough to the ground to ingest foreign objects and thereby damage its engines is of order ~fractions of a second. For a plane that is about to ...
niels nielsen's user avatar
7 votes

What is this tube connected to a 757 for?

The yellow tube you see in the photo is "in-ground air conditioning". It is more common to see it connected to the bridge.
Mike Sowsun's user avatar
  • 37.8k
5 votes

Would ground effect and FOD ingestion be factors at high speeds close to the ground?

How could flight 77 into the pentagon overcome the compression lift of the ground effect at 460 KIAS that close to the ground? Pitch. If an airplane's nose is low enough, it will descend and ...
Tanner Swett's user avatar
  • 5,781
5 votes

Why didn’t the 757 have manual-reversion capability?

When you have controls designed to be operated manually, in an airplane that heavy and that fast, you have to include things to provide aerodynamic force compensation like servo tabs and offset hinge ...
John K's user avatar
  • 132k
5 votes
Accepted

What is that Boeing 757 custom cockpit interface?

It's an American Airlines ACARS unit.
Ralph J's user avatar
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4 votes
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Why aren't 757 scimitar winglets flush with the ailerons?

No prior knowledge of this design choice, but the design direction seems pretty clear here. The original design reduces load towards the wingtip for efficiency. The textbook spanwise loading for ...
Stuart Buckingham's user avatar
4 votes
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Which avionics suite does the 757 use?

The original 757 cockpit was considered “glass.” It consisted of six screens: Pilot’s PFD and ND, Co-pilots PFD and ND, and an upper and lower EICAS screen. Behind the scenes, there is a triple ...
Frank's user avatar
  • 2,403
4 votes
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Did Boeing subcontract the manufacturing of the wings on the B757 series?

The 757 Wings and Wing & Center Body Section was manufactured at the Renton plant at KRNT.
Romeo_4808N's user avatar
4 votes

How many hydraulic systems does the Boeing 757 series have?

The Boeing 757 has three fully independent hydraulic systems. The three systems are "Left," "Center," and "Right." The left system is powered by an engine driven pump (EDP) on the left hand engine, ...
OSUZorba's user avatar
  • 2,639
3 votes

Where can I find United 757 Checklists? (CRM, Pre Start, Pre Takeoff)

I doubt that you can get an airline specific checklist for an airplane, but for Boeing 757-200, a generic one is available. Please note that they might be for simulators (as Ben mentioned) but are ...
Farhan's user avatar
  • 29.4k
3 votes

Could the Boeing 757 replace the Boeing 737 Max 8/9/10?

Not for cheap it won’t. The 757 went out of production in 2004. Boeing has since dismantled the tooling for that airplane and it would cost a lot of money to get that set up again. Then all the ...
Romeo_4808N's user avatar
3 votes

By using the speed brake do we reduce the speed or do we increase the descent rate or does both happen simultaneously?

The two most common types of speed brakes are fuselage mounted and top of the wing mounted speed brakes. The effect of both types is the increase of drag. Top of the wing mounted speed brakes also ...
Jpe61's user avatar
  • 28.9k
2 votes

Question about the difficulty of a couple of airplane maneuvers

A runway at a decent size commercial airport is ~200' wide and 10,000` long, which is about 2 million square feet or 45 acres, most of this is for roll out can pilots generally have no issue touching ...
Dave's user avatar
  • 101k
1 vote

By using the speed brake do we reduce the speed or do we increase the descent rate or does both happen simultaneously?

Every implementation of a speed-brake that I've come across is basically a method of increasing drag, rather like putting your foot on the ground with a scooter, and slightly differently from most ...
MikeB's user avatar
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1 vote
Accepted

Why is the intake of the 757 (RR) engine slanted?

This is the case frequently, as the aircraft doesn’t have the same pitch angle on ground while accelerating, or at rotation, or at climb or at cruise. So the intake slant is calculated to the best ...
user40476's user avatar
  • 1,797

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