Posted by Gandhi Weeps on January 23, 2007, 3:24 pm, in reply to "Re: WU - check this out" 1) What was the name of the material used to keep dust and debris from flying into the rotors of helicopters when landing? (2 points) 2) What do helicopter mechanics do to keep nuts from unscrewing due to vibration and what are the minimum standards? (5 points) They safety wire all connections after the nut has been properly torqued. The minimum number of turns varied according to nut size but the absolute minimum for any nut was 10 turns and they better be done uniformly or it's red-tag time. 3) Every person who has ever been to Vietnam mentions that they can't get this smell out of their nose. What is it? (1 point) 4) How many rounds of regular ammunition are there between trace rounds in an M-60 machine gun? (2 points) 4 to 1 ratio allowing the gunner to accurately “walk the fire” into the enemy position. M-60's were eventually replaced by 50-cals because they were prone to jamming from dust kicked-up by the helicopter blades. 5) What device was installed in assault helicopters to prevent door-gunners and crew chiefs from accidentally shooting the pilot or co-pilot? (2 points) The M23 bracket with a pintle mount and a collection box to catch ejected cartridges. These mounting brackets had this obvious advantage, but they also limited the amount of time a crew chief or door gunner had to “walk fire” into a “hot zone.” Prior to these mounting brackets, the M-60 was sometimes hung from a bunji cord in the open doorway and the door gunner stood on the skids of the chopper. This gave the door gunner an excellent, albeit “dangerous” field of fire, and sometimes as the pilot turned the chopper he would steer it right into the sustained and focused fire on the ground. Not good. 6) Which side of an assault helicopter did the door-gunner usually ride on? (2 points) Right side. The crew chief generally rode on the left. 7) If the hydraulic fluid in a Cayuse helicopter was shot-out during flight, could the pilot or co-pilot exert the physical force necessary to land the helicopter? The only hydraulics in a Cayuse are in the landing struts – so yes the crew could land the Cayuse. (1 point) Extra-credit if you answer the same question for a Huey. (2 points) They could land the helicopter all right, when it ran into a mountain or ran out of gas and dropped from the sky. Newton's law regarding objects in motion applies here. 8) What are the names of the three main steering controls in a helicopter? (1 point) cyclic (left-right, backwards-forwards), collective (up & down) and tail rotor pedals (trim). 9) What is the festive name for a ground attack on a helicopter that starts with RPG and then automatic weapons fire and why is it called that? (3 points) Christmas Tree Ambush – because the rpgs would light-up the ground as they were fired into the air, then the small weapons fire were like lights on the tree, with the bright light (the helicopter) at the top of the tree. Better if viewed at night…from far away. 10) Green & white golf balls comin' at you is what and why does it appear green? (2 points) Anti-aircraft fire. They are about the same size as golf balls and appear green because of the Doppler effect. You never want to see these if you can avoid them. Unfortunately, helicopters can’t hide behind rocks or trees or in ditches, so you either fight your way out, or do a tree-level skedaddle. I did not Google these answers, so my explanations/definitions may not match someone else's exactly. Everyone was an expert on everything over there.
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This posting means that RO is officially PNG'd.
It’s called penaprime. A tar-like substance lain down on dirt that made a semi-hard blacktop surface. In summer, it would get gooey and stick to the bottom of our jungle boots. I spent a lion’s share of my time cleaning this material off the floor and pedals of my two helicopters.
The smell of feces & urine burning in half a 55-gallon drum of diesel fuel. RO got the answer to this one probably because GIs were disciplined by being put on latrine-duty that entailed stirring this noxious mixture.
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