agentdarnell Posted March 11, 2015 Posted March 11, 2015 Well I just cant get up past around 700kph and would love to fly mach. Why is this not possible? [sIGPIC][/sIGPIC]
Azrayen Posted March 12, 2015 Posted March 12, 2015 It is possible. Without any details, only answers possible are either: - you're doing it wrong or - you're reading your speed wrong.
escaner Posted March 12, 2015 Posted March 12, 2015 Are you sure it is not 700 knots? Also don't load external tanks and get some altitude for larger mach number [sIGPIC][/sIGPIC]
OnlyforDCS Posted March 12, 2015 Posted March 12, 2015 If it is indeed knots that the OP has confused with km/h: 700 knots = 1296,4 km/h The default loadout for the F15C on the quick missions always carries drop tanks. These will severly limit your top speed, especially at low altitude. Current specs: Windows 10 Home 64bit, i5-9600K @ 3.7 Ghz, 32GB DDR4 RAM, 1TB Samsung EVO 860 M.2 SSD, GAINWARD RTX2060 6GB, Oculus Rift S, MS FFB2 Sidewinder + Warthog Throttle Quadrant, Saitek Pro rudder pedals.
agentdarnell Posted March 12, 2015 Author Posted March 12, 2015 OK Thanks. So it is knots not kph? Should be able to hot Mach 2.5. [sIGPIC][/sIGPIC]
VincentLaw Posted March 12, 2015 Posted March 12, 2015 Should be able to hot Mach 2.5.At high altitude with no drop tanks and no missiles you should be able to go that fast. At low altitude the max speed is around Mach 1.2. [sIGPIC][/sIGPIC]
PiedDroit Posted March 12, 2015 Posted March 12, 2015 The mach meter is below the radar screen, right of the left MFD on the same instrument as IAS (it's the inner scale). Also you have mach speed displayed in the HUD in BVR mode (bottom left). Otherwise, go to external view F2, put your viewpoint in front of the aircraft (i.e. you see the front of it). If there is no engine sound, then you are supersonic ;)
escaner Posted March 12, 2015 Posted March 12, 2015 IIRC, max Mach number is reached at about 37,000 or 38,000 ft in this plane. [sIGPIC][/sIGPIC]
agentdarnell Posted March 12, 2015 Author Posted March 12, 2015 Was able to get it up to 1.6 in a steep dive after 1.2 level. [sIGPIC][/sIGPIC]
BMCha Posted March 12, 2015 Posted March 12, 2015 The other night I was running clean at 35,000 feet and managed to get it up to mach 2.2 (groundspeed 1200 knots, IAS in the 700s) after a good minute or two of level acceleration. It was still accelerating but I had just overshot my destination and so I terminated the experiment. It's definitely achievable though. A clean config and higher altitudes are the key here, as that reduces drag and also the speed of sound.
Aginor Posted March 12, 2015 Posted March 12, 2015 Jep. Don't use external tanks, fly without weapons, climb to 38,000 ft, accelerate full burner straight forward. You should hit Mach 2 rather quickly. EDIT: AIf it doesn't work: check your input axis settings. Maybe you can't go to full burner? DCSW weapons cheat sheet speed cheat sheet
PiedDroit Posted March 12, 2015 Posted March 12, 2015 (about the F-15A/B) At lot is written about the F-15 being Mach 2.5 capable. First off, Mach 2.5 is altitude limited to above 50,000 feet and time limited to 1 minute maximum. I've flown the jet to Mach 2.35, its normal operating limit, on only a couple of occasions.Here http://foxtrotalpha.jalopnik.com/how-to-win-in-a-dogfight-stories-from-a-pilot-who-flew-1682723379 I don't know how accurate the sim is but that gives a good starting point :smartass:
GGTharos Posted March 12, 2015 Posted March 12, 2015 NASA has flown their f15 to M2.7. [sIGPIC][/sIGPIC] Reminder: SAM = Speed Bump :D I used to play flight sims like you, but then I took a slammer to the knee - Yoda
PiedDroit Posted March 13, 2015 Posted March 13, 2015 (edited) NASA has flown their f15 to M2.7. Yep, it was a -B with a modified powerplant IIRC (and probably much lighter too). The Streak Eagle had some records on its own too, dunno if it had speed records though. Edited March 13, 2015 by PiedDroit
GGTharos Posted March 13, 2015 Posted March 13, 2015 (edited) I don't know about lighter, and the power-plant modifications should be a clue too - those were the old engines. The F-15C is still equipped with a VMAX switch IIRC, and the -1 charts do not present its capability when using VMAX ... again IIRC. The Streak was stripped even of paint, but I don't believe it had engine modifications - you can fly that profile with the FC3 jet which is slightly heavier, but once supersonic the 220's are quite superior. Edited March 13, 2015 by GGTharos [sIGPIC][/sIGPIC] Reminder: SAM = Speed Bump :D I used to play flight sims like you, but then I took a slammer to the knee - Yoda
PiedDroit Posted March 13, 2015 Posted March 13, 2015 By googling F-15 NASA I read that they also used D version but I couldn't find which one set the speed record... I didn't know about this VMAX switch, it sounds like a "war emergency power" switch, the kind of switch the maintenance guy would hate you for using without a very good reason :D
GGTharos Posted March 13, 2015 Posted March 13, 2015 That's exactly what it is :) It increases supersonic performance and there's a useage time-limit, but it's a bit more than the -1 lets onto. The 220's appear to do just fine without VMAX, compared to a -100 with VMAX on. As for the NASA eagle, they weren't trying to set any speed records, they were trying to do science - I don't ever remember in which paper they wrote about that flight any more :) [sIGPIC][/sIGPIC] Reminder: SAM = Speed Bump :D I used to play flight sims like you, but then I took a slammer to the knee - Yoda
mvsgas Posted March 13, 2015 Posted March 13, 2015 (edited) (about the F-15A/B) Here http://foxtrotalpha.jalopnik.com/how-to-win-in-a-dogfight-stories-from-a-pilot-who-flew-1682723379 I don't know how accurate the sim is but that gives a good starting point :smartass: I think it is accurate for the A-model F-15 with F100-PW-100. I have never heard anything good about those old engines. ... The F-15C is still equipped with a VMAX switch IIRC, and the -1 charts do not present its capability when using VMAX ... again IIRC. In the F-16, it is called Max power switch. Some things will be different in terms of how the engine behaves but this should give you an Idea on the switch. Also, keep in mind this only applies to PW-220 engines, not PW-229, GE-100 nor 129. The MAX POWER switch is solenoid held in the MAX POWER position when the throttle is at MAX AB and airspeed is 1.1 mach or greater. Do not use MAX POWER except in actual combat. Use of MAX POWER limited to 6 minutes per application. Total of 60 minutes allowed before turbine inspection/overhaul. All MAX POWER time is recorded by the EDU or DEEC ( depending on updates) and shall be logged on AFTO Form 781 One thing I would love to see is the performance number on the GE powered F-15K. Not all are GE powered, but I just would love to see the numbers. Edited March 13, 2015 by mvsgas To whom it may concern, I am an idiot, unfortunately for the world, I have a internet connection and a fondness for beer....apologies for that. Thank you for you patience. Many people don't want the truth, they want constant reassurance that whatever misconception/fallacies they believe in are true..
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