Azazel Posted May 12, 2012 Posted May 12, 2012 I've been interested in testing the various IAS speeds at various altitudes for the Mustang but I'm having trouble finding any data out there. I've found this website so far but all the air speeds are in TAS: http://www.spitfireperformance.com/mustang/mustangtest.html For now I guess I'll just convert the airspeeds and see if they match up with the beta. My interest in this is to eventually find the fastest cruise settings (manifold and RPMs) at various altitudes without burning out the engine (which is bound to happen as ED updates the aircraft). Any info on what speeds WWII mustang drivers tried to achieve in normal operation and level flight (at various altitudes) would be appreciated: the manual really doesn't get into it. My Rig: EVGA GTX 1070 x 2 | EVGA x58 SLI classified | i7 X 990 CPU | 24 GB RAM | Windows 10 Home 64 bit| Track IR Pro | CH Fighter Stick | CH Throttle | CH Pro Pedals | [sIGPIC][/sIGPIC]
Azazel Posted May 12, 2012 Author Posted May 12, 2012 (edited) Close so far on the fm. Level flight @ 16500 ft throttle at 45in and RPMs at 2750 gave me 300 mph IAS which converted to TAS converts to 396 mph. Based on the charts I've been using (source posted above) a P-51D using the same engine did about the same in 1945: Normal Rated power (2700 RPM and 46") 16200' = 387 MPH I used 45in of manifold pressure and 2750 RPMs at 16500 because thats where I got the aircraft trimmed and I have my RPMs on a hat switch so getting the RPMs perfectly at 2700 is difficult. Good job ED. Passes the sniff test so far for me. Edited May 12, 2012 by Azazel My Rig: EVGA GTX 1070 x 2 | EVGA x58 SLI classified | i7 X 990 CPU | 24 GB RAM | Windows 10 Home 64 bit| Track IR Pro | CH Fighter Stick | CH Throttle | CH Pro Pedals | [sIGPIC][/sIGPIC]
WildBillKelsoe Posted May 12, 2012 Posted May 12, 2012 it's strange that they didn't post Alt/IAS charts for the big pony. The aircraft is widely known for it's climb abilities.. AWAITING ED NEW DAMAGE MODEL IMPLEMENTATION FOR WW2 BIRDS Fat T is above, thin T is below. Long T is faster, Short T is slower. Open triangle is AWACS, closed triangle is your own sensors. Double dash is friendly, Single dash is enemy. Circle is friendly. Strobe is jammer. Strobe to dash is under 35 km. HDD is 7 times range key. Radar to 160 km, IRST to 10 km. Stay low, but never slow.
159th_Viper Posted May 12, 2012 Posted May 12, 2012 it's strange that they didn't post Alt/IAS charts for the big pony. The aircraft is widely known for it's climb abilities.. All the relevant documentation is within the public domain. All you have to do is search :) Novice or Veteran looking for an alternative MP career? Click me to commence your Journey of Pillage and Plunder! [sIGPIC][/sIGPIC] '....And when I get to Heaven, to St Peter I will tell.... One more Soldier reporting Sir, I've served my time in Hell......'
WildBillKelsoe Posted May 12, 2012 Posted May 12, 2012 ^^ just so.. Like the missing wingspan diagram. I did a thread on it, few ppl fed-back.. AWAITING ED NEW DAMAGE MODEL IMPLEMENTATION FOR WW2 BIRDS Fat T is above, thin T is below. Long T is faster, Short T is slower. Open triangle is AWACS, closed triangle is your own sensors. Double dash is friendly, Single dash is enemy. Circle is friendly. Strobe is jammer. Strobe to dash is under 35 km. HDD is 7 times range key. Radar to 160 km, IRST to 10 km. Stay low, but never slow.
louisv Posted May 12, 2012 Posted May 12, 2012 IAS/TAS charts depend on altitude, not on the aircraft. So if you have any IAS/TAS chart, its good. MSI Z170A Titanium Edition mobo + 6700K CPU 32 GB G.Skill TridentZ memory 3200 MHz Sandisk Extreme Pro 256 GB SSD Samsung 950 Pro 512 GB M.2 SSD (3 GB/s) for DCS and +. HP ZR24W Monitor, EVGA GTX 1080ti FE Thrustmaster Warthog, MFG CrossWind rudder... and Oculus Rift CV1.
Azazel Posted May 12, 2012 Author Posted May 12, 2012 IAS/TAS charts depend on altitude, not on the aircraft. So if you have any IAS/TAS chart, its good. Yeah, I'm well aware of that. I was asking for tables on what airspeeds should be expected from the Mustang at various altitudes and various engine settings. My Rig: EVGA GTX 1070 x 2 | EVGA x58 SLI classified | i7 X 990 CPU | 24 GB RAM | Windows 10 Home 64 bit| Track IR Pro | CH Fighter Stick | CH Throttle | CH Pro Pedals | [sIGPIC][/sIGPIC]
flightace37 Posted May 12, 2012 Posted May 12, 2012 It's all in an historical document drummed up with the search "P-51 Mustang pilot manual" on Google. http://www.scribd.com/doc/34811808/North-American-P-51-Mustang-Pilot-Training-Manual. - WH_Mouse
Slayer Posted May 12, 2012 Posted May 12, 2012 The flight manual reccomends 46" manifold @ 2700 RPM for cruise I believe. Would be a good starting point for you tests. Then you have to account for the supercharger kicking up over 12k feet also. [sIGPIC][/sIGPIC] System Specs Intel I7-3930K, Asrock EXTREME9, EVGA TITAN, Mushkin Chronos SSD, 16GB G.SKILL Ripjaws Z series 2133, TM Warthog and MFD's, Saitek Proflight Combat pedals, TrackIR 5 + TrackClip PRO, Windows 7 x64, 3-Asus VS2248H-P monitors, Thermaltake Level 10 GT, Obutto cockpit
flightace37 Posted May 12, 2012 Posted May 12, 2012 The flight manual reccomends 46" manifold @ 2700 RPM for cruise I believe. Would be a good starting point for you tests. Then you have to account for the supercharger kicking up over 12k feet also. 46" and 2700 is the maximum continuous setting. Max cruise is 36" and 2400. These limits are posted in the manual, and on a plate in the cockpit. The real training manual contains several pages of charts describing expected speeds, fuel consumption, and range for various power settings. The supercharger can kick in over a very wide range, and the specific point depends upon power settings and outside conditions. I think 12k is a little bit low, and believe the range settles between 14,000 and 19,500 ft. You'll want to double-check those figures. The real values should be in the book. - WH_Mouse
louisv Posted May 12, 2012 Posted May 12, 2012 Yeah, I'm well aware of that. I was asking for tables on what airspeeds should be expected from the Mustang at various altitudes and various engine settings. OOps sorry, I read too fast... MSI Z170A Titanium Edition mobo + 6700K CPU 32 GB G.Skill TridentZ memory 3200 MHz Sandisk Extreme Pro 256 GB SSD Samsung 950 Pro 512 GB M.2 SSD (3 GB/s) for DCS and +. HP ZR24W Monitor, EVGA GTX 1080ti FE Thrustmaster Warthog, MFG CrossWind rudder... and Oculus Rift CV1.
ErichVon Posted May 12, 2012 Posted May 12, 2012 (edited) I've been interested in testing the various IAS speeds at various altitudes for the Mustang but I'm having trouble finding any data out there. I've found this website so far but all the air speeds are in TAS: http://www.spitfireperformance.com/mustang/mustangtest.html For now I guess I'll just convert the airspeeds and see if they match up with the beta. My interest in this is to eventually find the fastest cruise settings (manifold and RPMs) at various altitudes without burning out the engine (which is bound to happen as ED updates the aircraft). Any info on what speeds WWII mustang drivers tried to achieve in normal operation and level flight (at various altitudes) would be appreciated: the manual really doesn't get into it. Specific to the other sim I still sometimes fly. Check out the graphs. They can be copied and printed out larger. http://www.hitechcreations.com/wiki/index.php/P-51D The info is relative as to plane weight, engine type, temperature, humidity, wind, etc. Also see Soda's link at the bottom of the page. Edited May 12, 2012 by ErichVon
Azazel Posted May 12, 2012 Author Posted May 12, 2012 Specific to the other sim I still sometimes fly. Check out the graphs. They can be copied and printed out larger. http://www.hitechcreations.com/wiki/index.php/P-51D The info is relative as to plane weight, engine type, temperature, humidity, wind, etc. Also see Soda's link at the bottom of the page. Thanks Erich, everything that I've tested so far seems to fit with the charts I have at hand. This sim is amazing, and it's only going to get better :) My Rig: EVGA GTX 1070 x 2 | EVGA x58 SLI classified | i7 X 990 CPU | 24 GB RAM | Windows 10 Home 64 bit| Track IR Pro | CH Fighter Stick | CH Throttle | CH Pro Pedals | [sIGPIC][/sIGPIC]
effte Posted May 17, 2012 Posted May 17, 2012 I believe ED posted a chart comparing in-sim theoretical and achieved performance with real-life data a while ago? Either climb performance or maximum airspeed... can't remember, but either way the match was good. ----- Introduction to UTM/MGRS - Trying to get your head around what trim is, how it works and how to use it? - DCS helos vs the real world.
ErichVon Posted May 17, 2012 Posted May 17, 2012 Thanks Erich, everything that I've tested so far seems to fit with the charts I have at hand. This sim is amazing, and it's only going to get better :) Right now those figures may be interesting from an engineering perspective, but until DCS_World gets other aircraft like the 109, to fight against whose own peculiarities at various altitudes will be different and it then will make a difference finding that sweet spot advantage. Currently we fight with the same aircraft, except fuel weight and its fuselage placement will make a difference, as also will how many .50 cal rounds a person carries as to Alt + ' and a pre-load. It would be nice to know the sweet spot altitude for fuel conservation going to target and egress RTB. Yes, it definetly does not perform the same as Aces High's P-51D. And watch it with a weapons load and angle of attack, even taking off with a full loadout heavy is quite a bit different than going to just dogfight unloaded. I love it. I have never flown a real aircraft so I have nothing to compare to real life.
Recommended Posts