All Questions

Aircraft and automobile tyres can be divided into two main types, based on the orientation of the tyres’ body plies (the layers of tough fabric that form the main structural body of the tyre); radial ...

Supersonic area ruling is used to reduce the drag rise that occurs as aircraft pass through the transonic regime. While it has been validated experimentally, what is the theoretical/physics-based ...

So if on the same axis of the main rotor using counter rotating props to drive a single large rotor (two electric motors).... If the prop drivers stay level no matter AOA the rotor uses.... Yes ...

What height over a fixed plain (such as water) can a plane begin to take advantage of the ground effect or when air is compressed between the wing and ground near cruizing speed? Could an airliner ...

I will preface this by saying I do not have any level of knowledge in Aerodynamics - I'm a freelance journalist and so apologies for the poor level of general understanding. I'm attempting to create ...

The Lion Air Max crashed in the Java sea from a low altitude. What is the structural integrity strength of the fuselage?

So I had this question asked in my recent commercial-pilot checkride: The DPE asked me about high-density-altitude airports; he specifically asked me if I should add airspeed when I'm on landing ...

So let’s say there’s two aircraft, which are the same, and both are cruising at 28,000FT, the only difference is one plane is doing 260 knots and the other is doing 280 knots. If they both pitched ...

I would like to know some examples of aircraft (specific models) which can fly at FL600 or higher. As far as I know, commercial airplanes cannot fly that high so I can only think of jet fighters, ...

§135.225(a) states that, "...no pilot may begin an instrument approach procedure to an airport unless— (1) That airport has a weather reporting facility operated by the U.S. National Weather Service, ...

I know that airport diagrams show the exact position of airport runways in DMS (degrees, minutes, seconds) and therefore could use trigonometry to find how far apart runway centerlines are from ...

From what it appears to me, flight control surfaces seem to be taken for granted. In terms of how they actually work and what kind of physical outputs they give in terms of forces and such. Take for ...

I am developing an application for airport fire crew and ground staff. Part of the application is to familiarize users with emergency procedures of various aircraft. I have a few questions about the ...

I am just wondering if supplying compressed hydrogen to a turbine would be a better fuel as it has three times the octane rating of kerosene. It just seems better all around.

why in Lift and Drag calculation over an airfoil we ignore shear stress effect and focus on pressure distribution?

Following up from this question - or more specifically Brian Drummond's comment on the accepted answer: Or even revoked without modification, if something new is discovered about the existing ...

I have searched the site but failed to find a similar question. I know that modern civil aircrafts are equipped with multiple radar altimeters. Question is: In the unlikely event of those outputting ...

When electro-hydraulic servo-actuators are used for the actuation of control surfaces in aircraft, linear variable differential transformers (LVDTs) are used for position or velocity feedback. There ...

I'm an electrical engineer and I'm interested in civil aviation, more specifically in fly-by-wire planes like the Airbus A320, Boeing 777 and others. But I fell in love with the Airbus A320 as it is ...

— 1 per cent per 30 m (minimum radius of curvature of 3 000 m) where the code letter is C, D, E or F; and — 1 per cent per 25 m (minimum radius of curvature of 2 500 m) where the code letter is A or ...

The BAC One-Eleven, like most jetliners, has a turboshaft APU mounted in the tail section of the aircraft, which is mainly used on the ground, but, originally, could also be used during flight at ...

For example: If you request a visual approach and get approved, but you meant to request an ILS approach, are you not allowed to change it? Is there some type of penalty for changing approaches after ...

I am tasked with weighing a fixed wing aircraft. the aircraft can not be leveled because the leveling points are damaged. therefor it is going to be weighed not leveled, an inclinometer will read a ...

The margin of the Enroute High sectional H-4 claims that the times of operation of the airspace R-5107K near El Paso are "1400-0300Z, MON-FRI" (and other times by NOTAM). If the days of the week are ...

I can understand coaxial rotors cancelling the need for a tail rotor, however, I am curious as to if the second rotor is needed to actually maintain the same pitch or could be just used to offload the ...

The Albuquerque VFR sectional claims that the airspace table in the margin use local time, but some of the airspaces in the table cross timezone boundaries. Which timezone do those airspaces belong ...

What plane can land the slowest on the water? What plane can land on the choppiest water? Is there a way to land between the waves?

In June 2017 dozens of flights were cancelled in Phoenix, Arizona because of temperatures exceeding 120 degrees Fahrenheit/48.9 degrees Celsius.1,2 Hot air at a given air pressure is less dense, ...

Recently I was onboard a commercial airliner and we had just landed and were headed for the gate. I cannot remember exactly which airport but it was either Schiphol(Amsterdam Airport) or Bristol. As ...

I am trying to understand the derivation of some simple equations to calculate the neccecary takeoff speed for an airplane (under ideal conditions). Which is taken from 15. Takeoff and Landing. My ...

I have been reading the following article about radio navigation in general and GPS / GLONASS receiver design: A homemade receiver for GPS & GLONASS satellites in which the author states the ...

I want to know what exactly is "Type Certificate" and "Certificate of Airworthiness" means for an aircraft.

Is there any tool for Hinge Moment coefficient calculation that takes input of aircraft specification that includes general data such as wing, aileron, horizontal tail plane and elevator data. The ...

Sources: wikimedia.org and ar15.com Holdback bars are used to hold a carrier plane at full thrust until the catapult pulls it for launch. Older bars (right) use a disposable shearable block (item 5) ...

Source: tkaviation.net I suspect it's related to the fuel system, but it's only found on the left wing (see the yellow circle, not the pitot-tube). I haven't been able to find the right keywords to ...

From Wikipedia: From the start, engineers noticed that the wings were not stiff enough to carry the outboard engines at cruising speed without warping and fluttering. To alleviate this, an ...

I know that an increase in velocity (TAS) reduces the AOA and that makes sense. But how just simply increasing the blade rotation (RPM) results in higher AOA?

Ok I'm not a jet owner, I'm a novel writer. I wanted to get my airplane facts right for the story. Say my character has a mid-size (can go overseas) private jet. Has a door lock on the outside door ...

Occasionally while listening to ATC, I hear a beeping in the background of their transmission. My suspicion is it's a traffic conflict alert since the beeping is usually followed with a traffic alert ...

Can someone explain how speed impacts rate of turn and and degree of bank required? I'm trying to understand this practice problem but can't get the concept: Say you have 2 vehicles travelling at ...

What are the advantages / disadvantages of a live and fixed nose landing gear axle and how do they work? Maybe certain aircraft need a particular type fitted? I can't see the need of a moving axle (...

During WW2, some aircraft had gun cameras that activated whenever the guns fired, so that people on the ground could evaluate performance and help with kill ratios and other statistics. These were ...

The side-stick in the F-16 or F/A-18 communicates with the flight control computer to transmit the pilot inputs. This transmission uses a protocol. Which protocol?

How is the exosphere, composed of particles in a gaseous state, preventing the pressurized atmosphere from equalizing with the vacuum of space?

I would like to know the name (if any) and the specifications of Zenith's bush airplane? I would like to know the size, the diameter, the maximum load, bearing number/type, and so on. Seems that the ...

Let's say that I'm doing some pattern work in my favorite little Cessna or Diamond at my favorite little non-towered airport. Everything is going just fine, I'm on the downwind leg... Or, wait a ...

I know at larger airports, it's NEVER a slow time. But what about at smaller airports that are large enough to rate manned ATC, but things aren't always fast-paced, high-traffic like at JFK or DFW, ...

How much force does a helicopters tail rotor counteract? What are the formulas for determining this? How much rotational torque is produced by spinning the blades?

If props throw air outwards, why do some prop diagrams show a reduction in airstream diameter behind the prop disc, or are these velocity vectors? Diagram showing airflow outwards as shown on nap.edu ...

Boeing 737 Max updated MCAS will probably be cutted off in case of AoA disagree. Without MCAS, the plane is no longer similar to 737 NG (stick force per g requirement). Does that mean a new ...