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47 votes

What is this red canister on the tail of the YF-22?

The canister contains a small parachute and either a spring or an explosive charge to kick the chute out when it is needed. It is a precaution for spin flight tests, that's why it is called a spin ...
Peter Kämpf's user avatar
37 votes
Accepted

What is this little "rod" thing on the back of the F-22 for?

According to this cutaway (source) it is a "runaway emergency arrest hook housing":
sophit's user avatar
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30 votes
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What is this red canister on the tail of the YF-22?

It is a spin recovery/stabilization chute, installed during testing for high AoA test flights. The following image shows it being deployed on the ground. Image from fas.org
aeroalias's user avatar
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29 votes

What are the bumps in the F-22 Raptor wing for?

Yes they are fairings for the actuating mechanism for the control surface. I can't speak directly to the F-22's details but, this kind of thing is done on lots of airplanes. The F-22's control ...
John K's user avatar
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19 votes
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Why do the F-22 and F-35 look similar to each other and different from previous designs?

ymb1 is right - stealth and not styling determine the looks of both the F-22 and the F-35. But there is more to it. Watch Lockheed test pilot Tom Morgenfeld talk about them in this video: ...
Peter Kämpf's user avatar
19 votes

Why is Russian super-maneuverable thrust vectoring more prevalent than American?

This is a case of divergent design, and you can't know the answer without asking why current aircraft are designed they way they are. Following the work of Col. John Boyd in the 1960's in developing ...
Precious Mettle's user avatar
16 votes
Accepted

Why is Russian super-maneuverable thrust vectoring more prevalent than American?

Part 1 - TVC Perception The US also ran several programs with TVC: F-15 STOL/MTD and ACTIVE. F-16 VISTA / MATV. AVEN: F-18 HARV (High Alpha Research Vehicle)...
Hephaestus Aetnaean's user avatar
15 votes
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Why is an F22 slower than an F15?

Aerodynamic heating will damage or destroy the composite wing of the F-22, especially around the leading edge where compression heating is highest. See here for the temperatures which supersonic ...
Peter Kämpf's user avatar
15 votes
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Aside from simulated dogfights, do F-22 Raptors actively participate in live fire/target practice using live munitions?

Plenty of times. There are multiple missile shoots annually out of Tyndall Air Force Base, where F-22s or other active duty and reserve Air Force units fire live ammunition at target drones over the ...
Romeo_4808N's user avatar
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15 votes

What is this little "rod" thing on the back of the F-22 for?

It is the tailhook housing. Looking for a definitive picture, but can't find one.
WPNSGuy's user avatar
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15 votes

Can doppler radar be used to detect stealth aircraft by focusing on the characteristic flow field instead of the aircraft itself?

To a limited extent, yes, it's possible to detect the air disturbances left by aircraft. This NASA article studies the radar reflectivity of vortex wakes exhaustively. It's being proposed as a safety ...
Therac's user avatar
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11 votes
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How does the F-22 Raptor radar reflector work?

The F-22 RCS enhancers size and shape (to some extent), as well as this source for example, suggest it is a Luneburg lens. The Luneburg lens is a device that reflects electromagnetic waves very ...
Jpe61's user avatar
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10 votes
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Why do the F/A-18 and the F-22 Raptor have horizontal stabilizer as well as canted rudders for pitch control?

The rudders on modern fighters are canted mostly to reduce their radar cross section. A straight vertical tail would produce a corner reflector in combination with the fuselage or the wing and would ...
Peter Kämpf's user avatar
9 votes

Why do the F/A-18 and the F-22 Raptor have horizontal stabilizer as well as canted rudders for pitch control?

They're very different aircraft, built to different requirements, meant to fill very different roles. Large tails are good for pitch authority and high-alpha---which are good for maneuvering and ...
Hephaestus Aetnaean's user avatar
9 votes

What is this little "rod" thing on the back of the F-22 for?

While the cutaway drawing shows that Stinger described as an enclosure for the runaway arrestor hook, close-up inspection of an F-22 aft section reveals that is only partly true. The runaway arrester ...
Romeo_4808N's user avatar
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8 votes

How can an F-22 Raptor reach supersonic speeds without having supersonic inlets?

The jet uses a fixed, rhombohedral shaped jet intake combined with a serpentine intake duct. It allows for speeds just north of Mach 2 without the need for a variable geometry inlet to prevent ...
Romeo_4808N's user avatar
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8 votes
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Why does the canopy of the F-22 Raptor have a golden tinge?

In order to reduce the radar cross section (RCS) of the aircraft, the F22 canopies are coated with a thin layer of Indium Tin Oxide (ITO), which gives it a golden tint. From the book F-22 Raptor by ...
aeroalias's user avatar
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8 votes

Is the F-117 actually inferior in its RCS than the F-22 and B-2?

The few people that know the lab measurements, aren't at liberty to tell. So the only public information on stealth comes from modeling. However, stealth is complicated. It's not just specular ...
Therac's user avatar
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8 votes

Aside from simulated dogfights, do F-22 Raptors actively participate in live fire/target practice using live munitions?

Have F-22s fired live missiles in training? Absolutely. Here, firing AIM-9. These were almost certainly not with a live warhead, but everything else was 'live'. https:...
WPNSGuy's user avatar
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7 votes
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How does the Pratt & Whitney F119 achieve its features?

The afterburner is aft of the gas core of the engine in the jet pipe and bypass air from the fan would have already been mixed with the exhaust gases from the core prior to passing through the ...
Romeo_4808N's user avatar
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5 votes
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Why did Lockheed Martin give the F-22 stealth fighter such small fuel tanks?

The F-22 was developed in the 90's, primarily for use by the United States Air Force. This means it was designed to serve specific mission profiles. The F-35 however is going to replace the F-22 and ...
Ron Beyer's user avatar
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5 votes
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How can an F-22 Raptor reach supersonic speeds without having supersonic inlets?

The inlet spike is not required for supersonic flight, it is just one way to minimize the losses that comes with decelerating supersonic flow. As a general rule, the shallower angle that you force the ...
user74671's user avatar
  • 193
5 votes

Why do the F/A-18 and the F-22 Raptor have horizontal stabilizer as well as canted rudders for pitch control?

The design philosophy of the F-117 was different from that of the F-22 (or F-18, which was not intended to be a stealth aircraft). The main design driver of the F-117 (in fact, practically the only ...
aeroalias's user avatar
  • 100k
4 votes

Why is Russian super-maneuverable thrust vectoring more prevalent than American?

A very important reason is stagnation. US aircraft development has pretty much stopped cold in the mid-late 1980s, with just the F-22 and F-35 entering production since, and those decades overdue. ...
jwenting's user avatar
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4 votes

Why is YF22 designed with conventional rudders while YF23 with all-moving rudders?

As a general rule when you see an all-moving surface vs a fixed fin and control surface it's because you get more control authority per unit of surface area, so the surface itself can be smaller. ...
John K's user avatar
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4 votes

Do F-22's use cartridge start to start engines?

No, the F-22 has an Allied Signal APU in the port wing root opposite of the cannon installation, which is on the starboard wing root. From GlobalSecurity.org (http://www.globalsecurity.org/military/...
Romeo_4808N's user avatar
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4 votes
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Why doesn't the air force order more F-22's?

Aside from Juan's point about the F-22 being fairly outdated by now (it's an 80's era design), it is also not possible to just restart production of it. First, it would cost ~$10Bn to simply get to ...
zymhan's user avatar
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