Jump to content

Griffin

Members
  • Posts

    1643
  • Joined

  • Last visited

Everything posted by Griffin

  1. The main part of thrust is the acceleration of gases through the engine i.e. Newton's third law of motion. Pressure plays a minor role. Thrust is created by burning the fuel and air thus expanding it and accelerating the mass. This acceleration of mass pushes the aircraft forward. Compressor compresses the air to achieve conditions for efficient combustion. Compressor in itself does produce thrust forces in forward direction but the turbine creates forces in the opposite direction which can completely counteract the compressor forces and even surpass them by a large margin. Thus these forces can be disregarded when thinking about the fundamentals of thrust creation. Afterburning doesn't increase pressure in the jet pipe and it's actually undesired as it would affect the operation of turbine. It's again an expansion and acceleration of mass rearward. EDIT: I had the wrong Newton's law but the second law applies to jet engines just as well.
  2. I don't claim to know everything about jet engines but in the industry or literature I've never come across anything telling that burner shape affects the direction of the air flow. It's the compressor that brutally shoves the air in the right direction and pressure difference between compressor outlet and rear of the engine. The burner is naturally carefully shaped to be most efficient, but no matter the shape, the air/gas won't change direction.
  3. To any jet engine related questions I suggest you turn to AgentJayZ on Youtube. He does Q&A videos and just a couple of weeks ago his Questions 28 video has an answer to that around 15:30. Basically the compressor of the engine is driven by the turbine and the shaft power on that setup is tens of thousands horsepower. All these horsepower spin the compressor which rams air backwards into the engine increasing the pressure at each stage. The turbine on the other hand is basically an open duct with relatively free passage for the air, thus it has nowhere to go but back. It has to do with the pressure differential. A fluid or gas will always try to go to lower pressure from high pressure. As you have an immense pressure in front of the combustion chamber, the air has no other way to go than back. AFAIK burner shape doesn't have anything to do with it but it does transfer thrust forces.
  4. Tell that to Syrian tank snipers.
  5. Sure man but there's much deeper philosophy to this. :D On subject and speaking of party poopers: ;) :D
  6. I guess those aren't really funny if you understand even a bit of German but the Panzerwerfer was pretty absurd, don't you think? :) Just silly crap! Think of the first two ones as an introduction to the theme.
  7. He was part of the Axis of Evil comedy tour with Ahmed Ahmed and a third guy. Hilarious stuff check it out! Didn't like the Griffin guy too much. :D Here's a nice one with Ahmed Ahmed and in the beginning there's my favourite stand up man, Russell Peters!
  8. Sorry, I shouldn't have put the sentences next to each other like that as they aren't about the same subject (range). :/ I didn't mean the range. I meant how advanced the missile was. The Ataka is much better than I initially thought, better than Vikhr, thus I said that now I'm impressed as it brings the Russian helicopters on par with the best in the world. It's simpler than Hellfire but it seems to do it's job well and range is sufficient IMO. Plus it can be used on many platforms which is impressive also. I should think better and re-read what I wrote before posting. Finland doesn't have attack helicopters and doesn't produce any missiles either.
  9. The Internet Reacts To Facebook Buying Oculus Rift http://kotaku.com/the-internet-reacts-to-facebook-buying-oculus-rift-1551579758/+patriciahernandez
  10. The 9M120M version has a range of 8000 m. Seems better than the Vikhr! Well it's not even close to the Hellfire but it makes Russian helicopters fully capable and modern war machines IMO.
  11. They were probably flying Kobras around that poor Syrian pilot. ;)
  12. Ataka ATGM. Now I'm becoming impressed. http://russianplanes.net/id133139 http://russianplanes.net/id133143
  13. Belbek is now under threat of being taken over by Russians and I bet it will be today. Webcam seems calm so far and Ukrainian flags are still up. EDIT: Somethings up! A BMP is pushing a truck blocking the road aside. 16:48 16:50 a BMP is ramming the front gate. Moments earlier something smudged the webcam. Still visible. 16:53 an ambulance arrived. I don't know the reason. The BMP was possibly ramming to get the ambulance in quicker. The gate was closed and a car was blocking it from the inside. The BMP did not enter after the gate was rammed and opened enough for the ambulance to pass. A jeep with a roof mounted MG also appeared briefly. 17:14 the camera was taken down by a group climbing to the post or whatever it was hanging on. At that moment some Russian troops were outside the gate just walking around basically. Lots of Ukrainian troops were formed up on the front yard of what looked like the HQ of the place. They were all standing there in a large square formation. Reporters kept running around the whole time. You can still watch the last moment of the video.
  14. http://russianplanes.net/id132884 http://russianplanes.net/id132878
  15. Haha! Well this week at work I had 70% of absolutely nothing and 30% of paperwork. So I would give my left ball to turn 10% of that time into flying! :D
  16. You got me interested about what it's like to be a Luftwaffe pilot?
  17. Well I use contacts outdoors and glasses at home so military aviation was never an option for me. Just last year I applied to a partly government funded ATPL school but two weekends in a row working overtime and a stubborn flu effectively rendered my brains useless. Plus the competition is of course stiff. That would have cost some 12 000€ and the other option, a private ATPL school, costs 100k€ more is not an option. I could reapply in two years and continue to apply as many times as I want but then again I have a job in aviation maintenance industry where my prospects are good and if I wanted, I could save for ultra light aircraft license. Civilian pilot market is also very overheated and not worth pursuing IMO despite the possibility of a great job. It could become a terrible job just as easily though. So flying small planes in my free time and military aircraft (those I couldn't fly IRL anyway) sims suffice for me and keep me happy. My interest in aviation started from reading a fiction WW2 fighter pilot book so I didn't dream of becoming a fighter pilot immediately. First it was learning about the exciting WW2 aerial warfare and relive the thrill in WW2 sims. Gradually the interest expanded into other parts of aviation and became a way of life and a profession. Though, sometimes certain bastards appear on Youtube like Rodrigo David who sting that little needle of envy into my heart but it doesn't last too long. :D
  18. Griffin

    Tesla cars

    Thats already happening in Finland. They are planning a GPS based system and I think it even had some extra rush hour fees. Taxing the gas does exactly the same thing (without the rush hour fees) but I suppose they are trying to be early adapting the taxation model before electric cars will be the norm. You can imagine what the public thinks of that... The gas already costs 1.6€ per liter ($8.4/gallon) and diesel 1.5€. The system will cost millions to develop and tax payers will be paying for it. Then theres the GPS tracker that has to installed.
  19. Make sure you have autopilot heading hold enabled and flight director disabled. Make sure your pedals are trimmed to center as they might be deflected beyond the autopilot authority limits.
  20. Parts of course are expensive because of the required precision and the R&D that have been mentioned. Another thing is the certification that can cost around a million for general aviation aircraft. So yeah you're not buying just the material of the part but you're funding the whole process that has taken years prior the introduction to service of the aircraft. That must have been the most detailed explanation to the shortest question I've seen. Kudos for that! Those thrust figures however are true only static at sea level but at airliner cruise altitudes they are closer to 50:50.
  21. The best crosswind landings video I've seen yet and this guy has plenty more in his channel. Pretty impressive.
  22. Syria - Sniper team films ATGM that's launched directly at them http://www.liveleak.com/view?i=1cb_1394739409
  23. Reuters: Radar data suggests missing Malaysia plane deliberately flown way off course http://www.reuters.com/article/2014/03/14/us-malaysia-airlines-radar-exclusive-idUSBREA2D0DG20140314
×
×
  • Create New...