No. They could not fire through the propellor without shooting it off. A Frenchman designed a propellor with a armored deflector shield that allowed him to shoot through it and any bullet that hit it would bounce off. Imagine how risky that was to fly next to him. His aircraft crashed and the Germans inspected it, hoping to find a secret design that could use. They were disappointed so they designed a cam mechanism that was driven off the engine and it would stop the gun from firing when the blade was aligned with the gun.
propellers
3,000. That is not even close to the amount of bullets fired for every casulty through the Vietnam war. Three thousand rounds is a mere thought of how many bullets were torn through humans from 1959 -1975. The answer is never to be known. If you take a look at the statistics, 3k bullets were fired killing humans in the first year.
Yes, airplanes are aircraft. However, not all aircraft are airplanes. Helicopters, blimps, and balloons are aircraft- but they are not airplanes. Airplanes are generally fixed wing machines that move through the air.
No, because propellers do not power anything. The engines of the planes power the propeller to get the plane propelled through the air.
Anthony Fokker was an Dutch aircraft designer. He is most well known for the aircraft he designed for the Germans during WW1. Among his most well known airplanes was the Fokker Eindecker, Fokker Triplane This website has a lot of information on Fokker http://www.dutch-aviation.nl/index5/index5-0.html As a single invention, what was best known was his interrupter which allowed firing a machine gun through the rotating propeller. This stopped the firing action in time with the position of the propeller blade so that bullets were fired only when the blade was out of the way. Allied aircraft failed to catch up with this piece of technology and many were fitted with bullet deflectors attached to the propeller which reduced its performance and could deflect individual rounds in unpredictable and occasionally dangerous directions. Also sorry to say that the Eindecker (one decker) was the Fokker monoplane. The Triplane was the Tridecker. (Dozens of references on the web.)
An aircraft which is yawing is rotating around a vertical axis through its centre such that it nose points more to the left or right.
propellers
Rockets don't have propellers - they're propelled by direction of exhaust gases through outlets.
The system you are refering to was developed by the French. The deflector system relied upon a steel wedge being bolted to the propellers, so they could deflect the bullets that hit the propeller. It was the first successful design that allowed bullets to be shot forward, through the propeller. This system did not have any synchronisation gear attached, that would allow the bullets to fly between the blades, but rather relied upon the metal to prevent the propeller blades from being shot to pieces by kicking bullets aside. Enough bullets made it between rotations to allow the pilot to hit a target. The deflector was also called the Garros Wedge (after the French pilot who used it successfully Roland Garros) although it was designed by French aircraft designer Raymond Saulnier (Morane-Saulnier aircraft) If you are interested in a diagram of how the wedge looked, check out http://www.ctie.monash.edu.au/hargrave/morane-saulnier.html Scroll down to the section on Morane-Saulnier Type L, 1913. There is a diagram of the deflector. Not the best diagram, but the only one I could find on-line.
They rotate and produce forward movement through thrust.
This goes back to WW1. Firstly they used a metal deflector plate to protect the propellor. Then someone, I don't know who, invented a synchronised method of allowing the bullets to pass through it. By WW2 most machine guns were wing mounted. The Me 109 had a cannon which fired through the very centre of the nacelle.
.40 caliber bullets. Was this a trick question?
Yes.
yes
Water enters the submarine by entering through the butthole and leaving from the propellers
To "propel" the aircraft through the air.
After you get the Golden Egg for the Purple Giant, climb the vine from the rooftop restaurant at the far left of Poptropica Towers. Give the giant the egg and go to the Garden. There you will find the water bucket. Then go farther right through the Aircraft Graveyard. You will see several broken-down aircraft. Use the updraft from the propellers to get over the rocket, and you will find the jetpack there.