Mechanical Engineering

When the landing gear retracts, it is very important for aerodynamics that they retract into the body of the aircraft as much as possible. However, placement of the landing gear depends ultimately on factors such as the aircraft's center of gravity, its weight, its possible fuel load and much more, there may not be a good locaction in the aircraft for the wheels to rectract fully without some kind of articulation. As a result, aircraft designers often must come up with some pretty interesting solutions to enable to landing gear to be retracted fully into a space that is otherwise unused in the aircraft. Often in order for the landing gear to retract into its well, the wheel trucks may have to be rotated or pivoted.

Large aircraft in particular often have multiple wheels for each of the landing gear. It is particularly difficult to design a retraction system for these as the wheel trucks may be very large and ungainly.

Some large aircraft have the ability to pivot the landing gear to one direction or another for landing. This is done to increase the aircraft's capacity to land in cross-winds. In a strong cross-wind the aircraft may not be able to land gracefully pointed straight down the runway, and so the landing gear may be off-set one direction or another to allow the aircraft to land with a slight crab-angle.

Unirex N2 is close to the equivalent of Alvania R2

tensile stress is due to just the tension in the load whereas breaking stress can be due to breaking,shearing or compression!

Young's modulus

Body taper 40

Throughput andflowrate both express the quantity or a substance per unit time passed through a specific volume. There are two notable differences though. They are that flowrate is usually only used when referring to fluids and throughput is more suitable when considering the feedstock charged through process equipment not just conduit volumes.

"WCB" is an abbreviation commonly used in texting situations. It generally stands for "will call back", and is used as a placeholder.

magicly

The difference is "soft seated" or "metal seated". Soft seated valves are used in gas applications were any leakage is absolutely not tolerated. The materials used are Teflon or ceramic. Metal seated valves can have very tight shut-off, it all depends on the coating, pressure in the line, and the lapping of the surfaces.

You can run a piston with any sort of power, steam, hydro, electric motor.

Electric motors are often used to move a piston in pumps, but the rotary type pump is much more efficient.

Today steam is normally used to move a turbine, not a piston.

Most pistons are used in internal combustion machines and are used to capture to power of the explosion.

If you stretch an object, each side changes length by an amount due to strain,e, so the new length is L(1+e)..Each side normal to the stretch direction contracts by an amount equal to poisson ratio x the stretch.

If you calculate the change in volume V you get

dV = Ve(1-2u)

Ay u = 0.5 there is no volume change (incompressible); if it were greater than 0.5 volume would decrease which is unlikely. If it is 0, there is no lateral contraction and volume increases. If less than 0 the object will actually expand laterally rather than contract, and some special materials do this. Poisson ratio can be as low as -1, but most common materials lie between 0 and 0.5

Bevel inside of sch. 80 to match OD of sch. 40

Yes. Manufacturer is not an essential variable.

time line of Mary Anderson life the inventor

A TXV works as a metering device which senses the temp. of the suction line with a remote bulb as it gets warmer the diaphragm is de compressed to allow more fluid to flow through for cooling

1. Test the system, ie make measurements or collect other evidence 2. Analyse the readings 3. Locate fault based on analysis (step 2) 4. Determine the original cause of the fault. (ie find a method to prevent recurrence) 5. Repair the fault (bearing in mind step 4) 6. Retest the system

putting a journal bearing at each end of the turbine rotor or shaft would be to support it.

Overhead cranes are variously structured machines that "travel" along a runway structure or pair of tracks located above the work floor of a plant or factory

Yes, no filler metal is used. Often used on thin metals, the metals are pressed together and electricity is used to heat the metals to a state they melt slightly and fuse together.

Crumple zones are sections of the car designed to fold easily under pressure. This means that the damage done to the car will actually increase quite a lot.

The good news is that the damage as a result of a crash is dramatically reduced for both the passengers in the car and the object the car hits.

The design is to prioritise life over property.

I believe nothing would happen to you until the salts and dirt from your hand contaminates the water making it conductive. I wouldn't want to test it and i wouldn't encourage you to. and i don't know what a edm is.

Bearing principle is very simple: objects rolling easier than slide.

use a dial indicator

Simple answer: Yes.

You can calculate the combined effect of bending and torsional stress on a rotating pipe using the outside diameter. The angle of rotation and the shearing stress should also be considered.