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DarkFire

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Everything posted by DarkFire

  1. That would not give an accurate figure since the mass constantly changes due to fuel usage. It would be something like F = (Ms - dm/dt) * a where Ms is the starting mass and dm/dt is the change in mass due to fuel drain. The calculation is also altitude, humidity and temperature dependant.
  2. Some real information, or as close to real as we're likely to see in publicly available sources: A TsAGI report apparently states that the base line Su-27(S?) accelerates from 600km/h to 1,100km/h in 15 seconds, at 1,000m altitude, at an all-up starting mass of 18,920kg, and this equates to an average acceleration of 9.25m/s^2. I can't find an actual acceleration graph or the TsAGI report mentioned in the source, so the above should all be taken with a pinch of salt until it can be verified with actual documents. Obviously due to non-linear drag variation & other factors adjusting the figures for different altitudes & different speeds is far from simple, and since it's been 17 years since I last solved a differential equation I'm not about to try ;) or do the integration to find the theoretical thrust value for that matter.
  3. I do wonder if the effect of temperature on the AL-31F might be slightly over done. I wonder if this is related.
  4. I watched all the YouTube F-15C cockpit footage I could find. Looks like there's a modest degree of shaking during high-G AOA conditions but it's hard to differentiate camera shake from cockpit shake so... not sure.
  5. There's some precedent for ED having official support for modules - this is after all how we got to fly the Ka-50 with support from Kamov. I'd love to see a full fidelity Su-27SM and a mid-1990's MiG-29. I do worry though about how many DCS players would be interested in them. The Russian jets seem to have a much smaller user / fan base than the NATO aircraft.
  6. IIRC Combined Arms is slated to get a major upgrade at some point. It wouldn't surprise me if armour got much more detailed interiors & systems as part of that. My dream scenario would be for ED to try talks again with the people behind Steel Beasts - they would be a perfect fit to take care of armour modules for DCS World.
  7. I believe that there's some other issue with aircraft on the ground having an unnaturally large number of 'hit points' for want of a better description. I remember doing an A-G mission in my Su-27 where I had to kill a parked IL-76. The damned thing absorbed 6 x FAB-500's and an entire 30mm gunpad and still refused to die. I would suggest trying rockets.
  8. In fairness I could be wrong about the MiG-23's. Thinking about it I remember the enemy CAP being F-4's so I could be thinking about a different mission. I agree about the KGMU's. I've never found them to be effective for attacking anything except a column on a road. Outside of that one rare target type I've always found RBK's or rockets to be much more effective. Might also be worth trying FAB-500's - they tend to do reasonably well against light to medium armour if they impact close enough. They won't really touch MBT's but should be effective against other vehicles.
  9. IIRC there should be a fighter sweep of MiG-23's that are supposed to clear out the F-5's for you. That being said, Cold War Warrior is not an easy campaign by any means. One pass, haul ass is definitely the way to approach things. Partial mission success at best is entirely normal for this campaign. The only way I managed it was to do an ultra-low altitude ingress, pop up attack and dump everything on the target in one go then immediately dive back to weeds height & egress at Vmax, while continuously popping countermeasures.
  10. Almost certainly. The automatic roll neutralisation stops at all altitudes when speed approaches the transonic region. Given that it appears to happen at ~0.9M rather than a fixed IAS or TAS I would surmise that it is increased pressure on the control surfaces but likely due to the formation of transonic shockwaves rather than simply increasing dynamic air pressure. I'd imagine it may be entirely deliberate in order to avoid any uncommanded forces on the airframe in the transonic region of the G/mach envelope.
  11. There's another strange behaviour associated with the null zone: at the onset (nearly exactly 0.9M with full fuel) the roll channel no longer self-centers as it normally does. This behaviour continues at all speeds above 0.9M whereas the trim authority returns when speed exceeds about 0.95M, again with full fuel at low (<200m) altitude.
  12. I must admit I've become really lazy with my landing procedures. Keep the runway threshold in the lower third of the HUD until it feels about right to start flaring :D
  13. The requirement is that the gear must be down before the hook will deploy. That had me scratching my head for a while. Definitely worth checking that the game doesn't have multiple buttons or other controls assigned to the hook though.
  14. This is one area where I think ED could legitimately come in for some gentle criticism. A training mission for A-G in the Su-27 should not have wind. Training missions for an aircraft that, let's face it, can be a real handful for new pilots to fly should build up one concept at a time. Introducing the need to carry out visual / dead-reckoning corrections for wind drift on top of roll in / turn out patterns and CCIP / CCRP release modes is a mistake. I keep meaning to write my own mission for A-G training in the Su-27. Maybe now is the time.
  15. The thing I dislike about A-G in the Su-27 is that to get real accuracy it's necessary to get up close & personal with the target which obviously causes it's own problems. I'll have to try the old low level supersonic bombing technique to see if it still works...
  16. In fairness there's actually very little use for the salvo mode in the Su-27 unless you've loaded up with 36 x FAB-100's. By default FABs & RBKs are released in matched pairs which prevents the need for roll trimming after single releases. But yes, there's no indication at the moment of whether default or salvo mode is set, which can be very dangerous if you need to suddenly switch from A-G to A-A modes as salvo also works with your AAM's.
  17. As far as I'm aware brake heat and its propensity to burst tyres is not modelled currently. In any case, brake heating caused by energy dissipation doesn't burst tyres immediately - it tends to happen some time after landing as the heat soaks in to the tyres from the hot brake disks. There was a thread on this in the F-15C sub-forum. IIRC SOP for the F-15C is for any aircraft that's experienced brake application above a certain rolling speed (60 or 90 Kts I think) is separated from other aircraft and is allowed to cool for some hours before anyone goes anywhere near it in case of a tyre bursting and killing members of the ground crew. I would imagine that the Russian aircraft in reality also have upper limits on rolling speed above which the wheel brakes are not to be used.
  18. This. The tyres on Russian aircraft are very susceptible to over-stress and bursting under overweight landing conditions. If you're landing over the recommended max weight then I'd recommend a very gentle touchdown and aerobraking / use of the drag chute as much as possible prior to brake application.
  19. Just checking - I assume you have each pedal mapped to an analogue axis and not a button? Sounds like you do, so that observed behaviour is strange. First step will be to make sure that the individual brake channels aren't mapped to anything else along with your pedals. If that's all squared away... Not sure what to suggest next.
  20. This sort of hit ratio is common & fairly normal for ARMs. The typical reason is that most AA & SAM systems in DCS world will happily try to shoot down ARMs that enter their weapon engagement zone. Firing two in quick succession helps to increase your Pk to the point where the target will usually be hit.
  21. Tremendous trifle may be, but it's nice to know it's there & frankly after a couple of K hours in the DCS Su-27, exploring the very edges of the envelope are where fun & interest are still to be had. Test pilot style investigations are much more interesting than going A-->B on automatic control :thumbup: Everything I've been able to find indicates that the -SK is simply the export version of the baseline Su-27S. Max fuel loads are quoted as being the same as is the radar and EOS. As far as I can tell the Su-27SK is simply the designation given to the original Russian manufactured tranche of aircraft that would become the J-11A. In Soviet days export models were inferior to domestic versions (possibly with heavier, older equipment) but there's nothing to suggest that was the case with the -27SK so I'm not sure. I guess the final dip in the AOA graph may have been an anomaly that Sukhoi were simply prepared to accept given that it shouldn't ever be experienced by line squadron pilots if they keep to SOP.
  22. Very interesting article. I would imagine that the F-15 Golden Eagle / F-15X would be significantly superior in BVR, with the Su-35 being significantly superior in WVR combat. Let's hope it never gets tested, because at that point s**t gets real and we're probably close to WW3.
  23. My guess would be that the depletion sequence was designed to be as flat as possible whilst avoiding the need for a complex & heavy automatic fuel re-distribution system. It may also be significant that the main spikes at the start occur at fuel loads that are above the "nominal" load of 5,160 that Esac_mirmidon's translation suggested (tank 2 & tank(s) 3). Might also be relevant that the drop off at the end of the fuel curve IIRC happens at a fuel load that's safely below the fuel required for a nominal landing weight, so in practise the drop off at the end should almost never be experienced unless a pilot goes in to emergency fuel. Finally, I think the available manual is for the 27SK variant rather than the 27S that we have in DCS World. Wonder if that makes any difference.
  24. This is exactly what I bought the Yak-52 for, and I agree that it's a real blast to just fly around & enjoy some raw stick & rudder piloting :thumbup:
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