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Udat

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Everything posted by Udat

  1. Except maybe a north Atlantic map. That would be beyond descriptionally amazing.
  2. I bet it might not be very smart to land or taxi on poorly-kept or closed down airbases, forcing real world decision-making on the virtual pilot in case of emergencies. Would be cool if FOD likelihood could be modeled into the sim based on type/ownership of airfield, as well as weather conditions, etc..
  3. I am speechless. You guys go WAY beyond even ED themselves. You are setting the bar for others to follow, and you are making me fall in love with your product before it's even released. Just incredible work.
  4. So what is the velocity-to-air density ratio for the slowest reentry possible?
  5. Why disintegration though? The drag is equal to drag coefficient*air density*velocity squared*surface area. If air density is sufficiently low, air drag should be proportionally low, depending on the other factors.
  6. If that was true, that the blades have the same angle at the retreating and advancing side, the helicopter would produce 2-3 times the lift on the advancing side at around 100 kn if the blades spin at around 400 kn tip speed. Not good for level flight. What happens is that the blades starts producing more lift than it would be at a hover, as soon as it passes the 6 o'clock position on the rotor disk. This happens due to the increased velocity of the relative wind. Now an increase in lift makes the blade want to go up, and since helicoper blades can flap, the blade flaps up. This upward motion causes the relative wind to come from higher up, thereby reducing the AoA, and therefore also lift. The opposite happens at the retreating side. The higher the speed, the more the blades will flap to compensate. If this were not true, helicopters would not be able to accellerate out of a hover. And they would not be able to hover over a point on the ground in windy conditions. What i just explained is disymmetry of lift. The aerodynamic hazard called retreating blade stall occurs when the forward speed of the helicopter is so great that the retreating blade has to flap so much that the AoA to the realtive wind exceed its critical angle of attack, and stalls, eliminating lift and dramatically increasing drag for the affected section of the rotordisk.
  7. Why woud you add the gust speed to the normal wind speed? I can not read spanish, but the way I see it, your 10 knots on he 75 line is well within the green, and the gust speed is right on the limit between yellow (precautionary?) and red.
  8. Udat

    No VRS?

    Try to descend with 500 feet per minute, 0 airspeed and pull collective until you are using full power. If that doesn't do it, there is something wrong..
  9. You can also download the maneuver manual from Robinson helicopters website for free. It includes pictures; helps you visualise!
  10. Pretty much everyone considers 15° @ sea level standard. ISA = International Standard Atmosphere Temperature: 15°C @ sea level Pressure: 1013.25 hpa @ sea level Lapse rate: 1.98°C/1000feet :book:
  11. Here is an old NASA article on Coaxial rotor systems: https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19970015550.pdf
  12. I deserve it because it will allow me to teach my wife and son how to fly helicopters!!
  13. The entire nordic region with Murmansk, Iceland Norway, Sweden. Finland and the baltic would be the dream map. We could reenact much of red storm rising!
  14. Very true. I had more than 50 hours in the Robinson R22 before I started feeling comfortable with my set downs.
  15. Allthough I haven't flown any of the DCS helis (only real ones,) I could not imagine even trying without pedals. From what I hear they are way harder to fly (especially in the hover) than the real thing. So yes, get pedals!
  16. Well, the key to a precise set-down is the hover. If you can not hold a steady hover over a point on the ground, you can not be expected to precisely set it down on a point on the ground.. I would practice at some big aiport, and start by practicing hover taxi (airspeed below ETL, 3-5 feet skid height) along the taxiway centerlines. When you start feeling comfortable; stop your forward movement, maintaining altitude, ground track and heading. Do slow, controlled hover turns in 90-degree increments until comfortable. Practice hover over one spot for at least 3-5 minutes. As soon as your hover is good and stable, you can gently start lowering collective, still focusing on the hover. At some point your skids will touchdown, and the ground should come as a surprise. Good luck!
  17. That is very interesting! I didn't realize that pilots would fly in conditions as hazardous as that. I am curious as to whether the FAA "knows/cares" about it, and if they have a valid reason not to incorporate it and support it. At the safety course they seemed to have been taken by surprise when learning about the maneuver. I am surprised that they didn't have any prior knowledge of the technique. As a sidenote, they recently incorporated into the R-22/44/66 PoH as Safety Notice SN-22: http://www.robinsonheli.com/service_library/safety_notices/rhc_sn22.pdf I see by your info that you are located in Oregon. Do you fly there? I am currently in CFI training at Hillsboro Aero Academy in Troutdale. Would be funny if you're a DPE and we'd flown together allready :)
  18. Wow, impressive! Now show us a 500 fpm descent to a landing to a hover next to a taxiway entry on a runway, then use pedal turns and hover taxi to get to the nearest ramp and set down. Now THAT I would like to see someone do with mouse and keyboard!
  19. I am in love with the wallpaper og the inverted su-27 dispensing flares with cumulus gouda AS a background, and I want it on the front of my bank card. I manager to Google up a small one, but the resolution was too small. I cant find it in the game folders either. Any help would be greatly appreciated! PS: i hate autocorrection on ipads with a vengeance! EDIT: here it is: http://images.akamai.steamusercontent.com/ugc/47632380471632387/FB96CB2F98B5B9A3E2FEB62B1465CF25C0A8EF64/?interpolation=lanczos-none&output-format=jpeg&output-quality=95&fit=inside%7C128:128&composite-to=*,*%7C128:128&background-color=black
  20. I wonder how updated the databases and software will be for the Garmin! I use it almost daily in RL, so this will be exciting to try out in DCS. It is quite small, so I wonder how fiddly it will be to use inside the sims cockpits.
  21. Just some quick pointers, since I see a couple of small holes in the knowledge among all the awesome posts here. I don't pretend to know it all, especially on the specific modules and in DCS (you guys obviously know 10 times more than I ever will,) but I have a rotorwing private pilot licence, so just a couple of small tidbits: Ground effect should normally start becoming effective approximately 1/2 rotor diameter above the ground, and increase greatly in effectiveness as you get lower. Vortex ring state or settling with power requires 3 ingredients: high rate of descent, low indicated airspeed and power applied. If you descend faster than 300 feet per minute with less than 30 knots (or etl), you are generally in danger. It depends on the helicopter in question off course, but staying outside those numbers should keep you safe (if aerodynamics are properly modelled.) The ideal way to land is generally to slow below etl just as ground effect takes hold, then come to a hover. Hope I don't come off as an ass here, I have zero experience with helicopters in DCS, and most of you guys probably know a lot more than me.
  22. You're very welcome! Time was short and I am very curious, so I just snapped away at everything that looked somewhat interesting, like nosewheel pressue charts and whatnot, so a lot of the pics will be kinda meaningless..
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