MigBuster 2,887 Posted September 28, 2018 Hornet, Persian Gulf Map, and Su-33 Free Weekend! Starting today and lasting until 1 October 2018, play DCS: F/A-18C Hornet, DCS: Persian Gulf Map, and the Su-33 for DCS World for free! The Hornet and Su-33 include all the missions and campaigns as the purchased versions, and they can be played in both single player and multiplayer modes. Enjoy! If you do not already own one of these modules, we hope you will take advantage of this great opportunity and try out a new DCS World module and consider a purchase. Download and try out from either our e-Shop or Steam. For install any of those modules please see into Module Manager in the game. DCS World e-Shop DCS World Steam Edition DCS World Open Beta Update This week we updated the DCS World Open Beta to version 2.5.3.22176. Important additions and fixes to this week's Open Beta include: SA-2 SAM, Rapier SAM, HY-2 Silkworm anti-ship cruise missile and P-19 search radar added Persian Gulf Map updated with oil platforms, natural gas platforms, Sheikh Zayed Grand Mosque, and Aldar Headquarters building. More to come! Includes new Hornet mini-campaign Hornet air-to-air radar improvements for retaining lock with hard maneuvering, and resolved locking target when at high roll angles. Note: work continues on oddities with b-sweep in some conditions Mk-82Y (high drag with ballute) added to the Hornet inventory R-77 / AA-12 air-to-air missile guidance improved Mk-20 and CBU-99 Mk-118 submunition effectiveness increased Several AJS-37 Viggen additions Please see the complete change log on the DCS forum DCS World Helicopter Autumn Sale Pack Final Days Running just two more days, until September 30th, 2018, we are offering all four DCS World helicopters for just $69.99! Normally a $199.96 value; this is a 65% saving on each helicopter. DCS World offers some of the most realistic helicopter simulations available on the PC, and nothing compares to the helicopter combat environment that DCS World offers. You can purchase from our e-Shop We are also offering the same bundle sale from our DCS World Steam Edition page Please see our sale video Aircraft Flight with Folded Wings Explanation With the release of DCS: F/A-18C Hornet, we've observed some confusion and false-assumptions regarding how an aircraft can fly, or even take off, with its wings folded up. The answer: physics. For folded-wing aircraft's flight characteristics, we conducted calculations for the wings and stabilators in XFLR5 software. The calculations were done using VLM (Vortex Lattice Method) with a non-viscous flow model. The program then determines the characteristics of the linear area of lifting force dependence based on the angle of attack. For horizontal flight, we have the following equation to calculate how the forces are balanced in the vertical plane: pv2/2 SCL = mg The calculations show us that the folded wing configurations results in a 30% reduction in the coefficient of lift. To compensate for this reduction in horizontal flight lift, we need to either increase the angle of attack by 42% or increase the velocity 19%. Because the folded portion of the aircraft resides behind the center of gravity, a folded wing configuration results in reducing the negative pitching moment, which will also result in a reduced rotation speed at takeoff. Initially, we didn't take into account the fuselage, stabilators, and flaps lift capabilities, which all add to the total lifting force. Unfolded wing Folded wing For an aircraft with non-folded wings and mass of 35,000 pounds and 8 degrees of angle of attack, the velocity to create the lifting force would be 186 knots without taking into account the fuselage, stabilators, and flaps. For an aircraft with folded wings and a mass of 35,000 pounds and 8 degrees of angle of attack, the estimated velocity for creating lift is 222 knots (i.e. 186 +19% = 221,34 knots). In our model, the velocity for a mass of 35,000 pounds and an angle of attack of 8 degrees is 205 knots due to the fuselage, stabilators, and flaps. Sincerely, The Eagle Dynamics Team Share this post Link to post Share on other sites
