We’re rewarding the question askers & reputations are being recalculated! Read more.
58

That's called the step. Without it, you'd have to fight against the buoyancy of the rear end of the hull when you rotate for takeoff. However, a seaplane float or hull must be designed to permit the seaplane to be rotated or pitched up to increase the wing's angle of attack and gain the most lift for takeoffs and landings. Thus, the underside of the float ...


58

They are definitely not jet engines. They look more like electric motors or generators or blower units or something.


51

It's an airspeed indicator for ultralights. The pitot inlet is at the bottom and the pitot air pushes a little red plastic disc up and down on a central rod, with a calibrated clearance between the edge of the disc and the walls of the tube. They are very sensitive and are good down to 10 MPH or less. You'll also see them on hang gliders. See here: ...


49

It's too big and too intact. In a turbofan engine, you see the fan upfront. The casing (nacelle) surrounding the engine would not survive. And the remaining core that runs the engine is much smaller compared to the fan and engine, in diameter and length, respectively. For comparison, this is the remaining core from the 737 Max crash in Ethiopia (lower-...


46

These are very large electric motors, used in HVAC plants or water distribution, probably. Or possibly main generators out of a diesel gen-set. They are very dense and tough by design, though certainly beat to snot; they may have been inside a building that collapsed. They are on the trailer together because they are going a scrapper who specializes in ...


43

It's a Boeing 314 flying boat. From the late 30s (look at the two rectangular windows behind the cockpit). The last dedicated navigators on long range flights had started to disappear by the late 60s in the airline business.


43

It is a fitting for a Hucks Starter. Photos from Vintage Wings Canada


39

It is just a design feature, and serves no technical purpose, beyond filtering some light and providing a waterfall feature. Safdie designed the roof of the rotunda as an inverted dome, an asymmetric dish floating above the piazza that lets sunlight in and filters the daylight with a special white fabric ceiling. source: https://www.bdcnetwork.com/ready-...


38

They are the roots of the variable stator vanes that control the direction of the airstream as it enters each compressor stage to manage and optimize the angle of attack of the compressor blades in each stage. The vanes are connected to the ring shaped gang bar and somewhere around the circumference there is an hydraulic actuator, or a series of them, that ...


34

Those are Elevator shaft motors, they're wound for high starting torque, not like most pump motors. Here is one of the motors from 2 other angles. It's on exhibit at the 9/11 World Trade Center Memorial & Museum. Photo 1 (Source "More Than Route 66" blog): Next to the radio tower was an elevator shaft motor also recovered from the rubble. The ...


32

According to the Airliners.net forum, they are fairings that cover hardpoints used for attaching outsize loads. Outsize loads that cannot fit into the capacious cabin (including Buran and Energiya components) are carried 'piggyback', the load supported on two main attachments above the center section. These supports and other smaller ones along the ...


28

It's called a hull step. Below is with and without: It reduces water drag. As the plane gains speed and the aft body is lifted, only the forward hull will be in contact with the water. Source: Laté 631 Replica - Chapter 3 - Hydrodynamics


22

It was a test bed that was looking into laminar flow on the wings. was converted in 1942 as a two-seater, with an elongated central nacelle extending aft of the wing trailing edge, intended as a research vehicle to find ways of reducing drag, and was the only P-38 to have have a full dual set of flight controls. Later it was modified with ...


22

That is a fuseholder for the optional clock or optional Hobbs meter. The yellow wire probably should be connected to it but you should have a certified mechanic inspect it.


22

It holds a life raft. In case of ditching in the ocean, the raft would be removed from that compartment and tossed into the water, where it would inflate.


21

The “toothed” exhaust are called Chevrons and they reduce noise. They are an option on CFM56 equipped A321 aircraft. Wikipedia CFM International CFM56 ”GE and Snecma also tested the effectiveness of chevrons on reducing jet noise. After examining configurations in the wind tunnel, CFMI chose to flight-test chevrons built into the core exhaust nozzle. The ...


18

Those are airbrakes, they allow the aircraft to increase its drag substantially to bleed off excess energy. They are hydraulically operated, and need pressure for both deployment and retraction, i.e. they do not auto-stow, at least on this aircraft. Airbrakes are a handy feature, especially for a ground attack aircraft like the Su-25 in your picture, as ...


17

Galley seal. It works like a cable tie, you can put one end inside a hole on the main body but you can't pull it out without destroying the seal. The cabin crew will seal the galley carts containing alcohol and other duty-free items before landing and note the seal numbers in their report. This is required by law in a lot of countries.


17

Unlike many of the others who have responded here, I have relatively little expertise in identifying motors and wouldn't be able to distinguish a pump motor from a high-torque lift motor at a glance. I'm not even very expert when it comes to jet engines. However, I do think that one reasonably reliable heuristic is this: if it appears to be attached to a ...


16

They are indeed the Ram Air Outlet Doors. (source, showing Ram Air Inlet (RAI) and Ram Air Outlets (RAO)) From the A380 FCOM (21 - Air Conditioning): PACK DESCRIPTION The hot bleed air flows into each pack, via the two pack valves, then enters the heat exchanger. This heat exchanger precools the air using external air. This external air enters ...


15

That's the EPR inlet pressure sensor (there's another one located aft of the engine in the exhaust). EPR = Engine Pressure Ratio, one way to measure thrust. (source) See also: What is the difference between EPR and rotor speed as thrust setting parameter? How does the EPR reading behave in reverse, and in reheat modes?


15

It is a civilian owned C-130 Hercules used for aerial spraying operations. It is owned by the International Air Response company based out of Mesa, AZ. The aircraft is equipped with a RIDSS spray system for use in things like oil spill response (for spraying dispersants). You can read more about the system here.


14

It's indeed an airspeed indicator. Here's one at Oshkosh 2018, with me blowing about 27 knots into it.


12

I've found it on the 737, both the -800 and Max as far as I've looked. It's even noticeable from the outside. The related patent from 2005 is US7267302B2 Window airflow damper. It solves an issue with severe window fogging. Basically it's a device that replaces the usual breather hole by putting the hole on top and covering it with a damper. There is a ...


12

I don't see an ASI in the panel. I am unable to confirm this guess, but it could be an airspeed indicator (ASI). Google Dwyer Wind Speed Indicator. The Dwyer is plastic, wider at the bottom, and works by having the wind push a ball up a tube that gets progressively wider near the top. As the airflow pushes the ball up, more air can leak around the ball. ...


11

It's a VOR antenna. You can find more information about it in similar questions like this one or this one.


11

From Wikipedia: The Rockwell B-1 Lancer has small canard vanes or fins on either side of the forward fuselage that form part of an active damping system that reduces aerodynamic buffeting during high-speed, low altitude flight. Such buffeting would otherwise cause crew fatigue and reduce airframe life during prolonged flights. Having a traditional ...


11

It's Architecture [sic], and it's for your eyes to behold: Safdie architects explain further.


9

The manufacturer, Big Ass Fans, calls those devices “air fences.” Based on this naming I assume they are most likely there to redirect spanwise flow on the longer airfoils, not to prevent separation. Such a narrow airfoil built to move at a steady speed and loading would probably not suffer from separation issues. They are basically the same as wing fences. ...


Only top voted, non community-wiki answers of a minimum length are eligible