Jump to content

alfredo_laredo

Members
  • Posts

    363
  • Joined

  • Last visited

Everything posted by alfredo_laredo

  1. Sorry i think you should just leave it at zero.. It will add up.. I still prefer using the left botton for a countdown
  2. First of all, excuse my english... Im going to cover the very Basics of engines and props. (Im in no way expert on the Merlin Engine) The engine works like any other 4 cycle engine works. Fuel and O2 enters the cylinder, piston compress it and then it ignites. What is the MP? Manifold Pressure meassured in Inches of Mercury.. is the amount of Mix of Fuel/o2 that goes into the Cylinders.. and meassure the SUCTION into the cylinders. Logic says that the more suction, the more power. But this power is send to the propeller. The prop in the P-51D is a constant speed propeller. Lets explain this thinking first in a Fixed Pitch Propeller.. or in this.. Notice the Blades of this fan. they are big and they have a certain angle. This is done to produce the most amount of "thrust" at the lowest posible speed. and so it has a low Pitch Now, Imagine mounting this fan on the top of your car and turn it at its maximun speed. Obviously is not going to have enough thrust to move it but it will generate a minumun amount of thrust... The question here is... if you start the engine of the car.. and accelerate.. at what speed the fan will act more as an Air brake than as a Help in moving it? The answer.. at a very very low speed... because again, is designed to produce the most thrust at the lowest speed. The same principle goes to a fixed pitch propeller. For example a Cessna 152. have a propeller designed to work better at certain speeds. If you need to archive the shortest take off distance posible you need a Low Pitch propeller If you need to archive the fastest cruise speed you need a High Pitch Propeller. The Cessna 152 (and most of other light airplanes) is a balance of this two needs. a High performance aircraft like the P-51 requires both. and so, it has a Constant Speed Propeller. This means that by moving the RPM lever, you are not instructing the prop at what angle it has to be.. you are instructing the Governor at what pitch it has to be to mantain a certain amount of Revolutions. The Propeller governor will give you between 1800RPM and 3000RPM by constantly adjusting the porp between 23° and 65°, at different speeds and MP setting Explaining this.. the Prop of a P-51 flying at 30000 RPM at 150 MPH will not have the same pitch angle of a P-51 flying at 3000 RPM but at 250 mph. In take off, to archive maximun thrust at the lowest speed (like the fan) it has to be a very Low Pitch, so moving the RPM lever to the max. will archive this. But once you are in the air and speed starts to build up, and keep the RPM and max.. the prop will start to work as an Air Brake. So its time to change its pitch by reducing the RPM... normally at climb you mantain 46" MP and 2700 RPM... this gives you the best pitch for climbing. Now.. for combat operations, as far as I know most pilots in real life (and in DCS) just keep the RPM High, 2800-3000 this just takes away the worries of having to deal with engine managment while they are being shoot at. But be very careful with diving at high RPM.. because normally, the engine is the one that moves the prop... but in a High speed High RPM dive, the prop will start to act as a brake and also the Wind will start to "windmill" that prop, and causing it to go faster and faster.. At the end.. the PROP is the one that will be driving the engine, and this is very dangerous to the engine. (think of it like going down slope on your car at the First Gear... the tires are the one driving the engine) So at high speed dives, reduce your RPM. this are the recommended settings for different flight situations (MP"@RPM) Take Off. 61@3000 Max time 5 minutes Emergency 67@3000 Max Time 5 minutes Combat 61@3000 time max 15 min Max (no time limit) 46@27000 Max at Cruise 36@2400 The Time limit is there for temperature control! and Temperature control deserves a whole new post. :music_whistling: You can exceed this times as long as temperatures are in the limits (still not recommended)
  3. It is an electric resistance, that warms the Pitot Tube. (and by warm.. i mean almost red!) As a Basic Rule, turn on the pitot heat under 5°C (or under icing conditions) There are no restrictions for how long you keep it on. Remember is electric so in case of Generator Failure you should turn it off (as with most of other electrical load) Its very difficult to really damage the Pitot by leaving it on in the ground... is more of a safety issue to the ground crew.. because it gets really hot!
  4. Thanks! your textures are really great
  5. Any news on the updated "darker" Mexican Navy??!!! =)
  6. Still Broken on Update 1.2.6 Update 2.. PLease fix this.. is the most anoying Bug
  7. Thanks.. will work on it and see what happens..
  8. where can I find it?? I only see 4.psd Files, all of them for a different part of the chopper. Not like the P-51 wich has a spec file apart
  9. Hi, Im trying to do a repaint for the MI8. The problem is that my texture is very shinny or reflects a lot of Light. and looks very unrealistic and plastic. here is what I have. and Im looking for something more matte even seems black (like the last pic) I guess it has to do with the Alpha channel.. but The MI8 template doesnt have a Spec File.
  10. Thanks!!!!!!!:thumbup:
  11. Excelent job on the Mexican Navy.. Only a problem I found it to be Too "White" and Shinny... is there any way I can change it to a little darker tone. The Real One, shoudnt shine
  12. Real Life... (taking out mechanical problems)
  13. Personaly i would prefer having another Prop instead of the 262.. Like the P-38 or the Stuka! The 262 in a flight sim is not going to be a really hard plane to simulate, theres no real 262 flying today (maybe a replica with new gen engines) so no real sounds recorded, no real pilot input in the process etc.. In DCS i predict is going to be so overpowered that no P-51 is gonna catch it and I see a lot of WW2 servers banning the 262 262 is gonna be use just for the fun of it.. but performance wise is a killer to the experience of WW2 (Props) the 262 didnt change the curse of the war because it was too late! and to few! and specially full of mechanical problems that are gonna be hard to see in a simulation. I Hope they find a way to balance this bird..
  14. Check the tank selector is on the Left Side.. always take off on the left fuel tank Check Theres Fuel on the tank Keep the Electric Fuel Pump On! During all flight. About Oil Dilution... If Your Oil temp are above 40, the Oil is not an issue on your takeoff. By the way, --oil dilution doesnt work If Your engine is off. --Oil Dilution Doesnt Work when Oil Temp is Really Hot.. Because the Fuel will evaporate. If you plan to re-start your engines in a below 0° situation.. dilute the oil before engine shutdown for a few minutes... --If you start in cold situation you can use Oil Dilute before your Run Up checklist to bring down your Oil Pressure
  15. just to get clear.. what is the last best version of TS to use TARS? is the MI8 support anytime soon??
  16. Very simple to use, Forget all the Test procedures for the doppler, and just go to the Basic Handling section.. Ill explain.. In the Copilot seat, you have your doppler (check the last picture) Theres 3 options. XTX Distance Distance Track You will adjust just the Distance and the track.. As an example, you want to fly from Aiport "A" to Airport "B"... You check in the mision editor or F10 map with the "Ruler" option your Track and distance. Lets say that theres 50 Km between airport A and B in a direction of 090° (east) You just set your distance either with the Left botton to 50km for a countdown from 50 to 0 as you get closer to airport B or use the Right Botton to 50.. to get a count from 0 to 50 (remember this is the second number.. not the first XTK Distance) And the Third number is your Track.. just put 090° there.. Turn the doppler on.. Take off and fly heading 090.. you will see in the XTK Distance option starts to drift either left or right.. this is because of drift wind etc.. If the XTK distance show a deviation of 1km to the right.. you need to compensate to the left.. lets turn your heading to 095° or 100°... this way the XTK start to descrease. The goal is to keep XTK distance at 0 all the time. this way you will be traveling a straight line. I recomend using the MI8 English cockpit mod.. so you dont get confused with russian (left and Right)
  17. Both ADF are not working at the moment.. I use the Doppler System wich is a great navigation aid and extremly precise. Check this to learn how to use it... http://www.alasrojas.com/2.0/foro/download/file.php?id=242&sid=3ccb42a3b948361bfd3233fff2a388c5 Its very simple... you just have to know two things.. Direction to destination Distance to destination I get both of this in the Map with "F10" or trough the mission editor waypoint.
  18. first try to change that option in the configuration---special---UH1 Huey Check or Unckeck that option and see what happen
  19. Using trackir? Try changing the opcion in "special" for the uh1.. "Aim with trackir" from off to on
  20. its normal, a trim works moving the oposite way.. From google =) Im not sure, but the right wing may have a Bendable Trim Tab... is a trim that you "Bend" with the hand before take off =)
  21. Done, Looks like Mi ISP doenst like that domain... I cant download it and cant see your screenshoots at your first post... Doesnt Matter, a friend download it and sended to me. Thanks!! Excelent Job!
  22. Hi, just like to report that while practicing some gunnery online with 3 mi8 and destroying several trucks. Suddenly we lost the tracers, all of us, we coudnt see the tracers of any gun or granade launcher, just the smoke in the pod and the impact on the ground.
  23. From Belsimtek
×
×
  • Create New...