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baffmeister

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Everything posted by baffmeister

  1. Thanks for the update ideas. I will test the nose gear edits and look into the other improvements. This project is becoming a long term one but there may be a formal upload at some point in the future so it's good to get information on any past mods that would make for a better package.
  2. I found some interesting MiG -21 data online so did a mini review of the ThirdWire flight model to see if there was any room to improve the performance a bit. Regarding the aerodynamics everything looked good and any changes that would have been made based on the data would have resulted in slightly worse performance so I left it as is. Best areas to improve performance were some adjustments to rack weights, some potential adjustments to empty weights on some versions but not the Bis, implementation of a combat flap set up for the later versions, and a work around for the Bis series to model the very large emergency thrust setting that was available below 4km/13123ft. There was a 3 minute limit on that system but it's not modeled. Might try something in the future to get an engine blow up at some point past 3 minutes but it's low priority. Here's some info on the changes: Engine Boost: I've been aware of this capability for a long time but didn't think it could be modeled. Turns out, it can! The engine afterburner mach tables use the same altitude table as the dry mach tables so what I did was add a second engine to the Mig-21Bis, but it supplies thrust in afterburner only. It adds additional thrust bringing the total thrust to 21825lbs static. At 13000ft the altitude table included with the second engine starts cutting down on the thrust until it's completely gone at 14000ft. The additional fuel consumption with the added thrust is modeled but it's not as bad as I suggested in a screen shot. After fixing a mistake the fuel lasts around 4 to 4 1/2 minutes but the fuel consumption and thrust can vary quite a bit depending on mach number and altitude. The additional thrust activates at about 98% throttle so to conserve fuel you will want to use the AB with discretion. It just occurred to me now I might be able to set the main engine up so it gets it's max thrust around 90-95% which would leave a bit of a dead zone between the main and second engine. Will give that a test at some point. Combat Flaps: This system appeared on the later versions, possibly first appearing on late production PFM's but not 100% sure about that. A graph showed the additional lift from the combat flaps that was available at speeds up to mach 0.90. I'm not sure how they worked in RL but these ones are just set to automatic mach and are fully deployed at 0.30 mach and fully retracted at 0.90mach with a continuous variation between points. The combat flap system worked between 0deg and 25deg flap angle. With the automatic combat flaps the landing flap setting is no longer available. Rack and empty weights: With the smallish low lift delta wing the MiG-21 suffers badly from increased weight. Any legitimate weight savings would help a lot. Anyway, from the info I was looking at the weight of the main racks was considerably lighter than the TW values so I made some adjustments. Aircraft empty weights need more research but the Bis looks about right and the MF looks too heavy by about 240kg. Any further information on these topics would be appreciated. Here are beta test FM's for the Bis and Bis-B: MiG-21BisFM's0.95.zip
  3. SF2 F-16A

    Not sure what the actual aerodynamic limits might be for an F-16A but the type did have an automatic G-Limiter installed. A long time ago someone came up with an aerodynamic G-Limiter for the stock TW F-16A. I think it was Caesar who passed it along to me. The modified FM is attached at the bottom. The mod works quite well if you fly in a normal fashion with just temporary high G turns. At high speed if you just pull back on the stick and keep it there it will piss away all your speed until you get below about 9 G's. The limiter kicks in a bit over 9 G's so theoretically if you kept the plane at exactly 9 G's at a high enough speed it could sustain that but I doubt that's possible in practice. I don't fly the F-16 much so not sure if this mod has any affect on the AI. Here's a "drop in" F-16A data/FM with the only mod being the G-Limiter: F-16A_G-Limiter.zip
  4. I agree, that's probably the best approach to get what you want. It isn't something that I even noticed but if you get a more realistic look please pass along the edits.
  5. The previous emergency thrust levels were overstated based on the flight manual and other sources. The ThirdWire default values are correct up to about 13000ft. Based on what I know now, I would actually have to model LESS thrust above 13000ft to more accurately model the Bis engine performance.
  6. Test FM's for the two ThirdWire MiG-21Bis models attached at the bottom. The main objective with these is to try and model the high alpha behavior as described in the flight manual. I had to make way more changes than expected to add only about 5degs to the existing AoA range. With the revised FM's I'm trying to model some lift transfer from the outer to inner wing panels. According to a document I read this occurs in the 20-25 deg range. To get a smoother transfer I went with the low end of the range at 20deg. The edits to the outer wing panel limit the CLmax to what it would be at 20deg, based on a straight line variation. The "surplus" CLmax has been added to the inner/forward wing panel that has a revised stalling angle of 20deg, so it transitions to the CLmax slope at 20deg and continues up to a new AlphaMax of 33deg, versus the original at 27.66deg. Some additional CLmax has been added to model the added lift available at 33deg. Some additional edits were required to the StallMoments and the StallXACShift tables to reach the higher AoA range. Here's a description of the idle power level flight stall behavior at 5000m/16400ft from the Bis flight manual, with some comments regarding the revised FM's in brackets: 340-370kmh /184-200kts: pre stall buffeting [around 170-175kts] 280kmh / 151kts: Aileron deterioration [somewhat noticeable] 230-240kmh / 124-130kts: Wing rock develops but pitch stable [no noticeable wing rock] 220-230kmh / 119-124kts: Aircraft starts to pancake [ I assume that means a high sink rate but pitch stable, which it does] 200kmh / 108kts: Large wing rock up to 50deg left/right at about 6-10deg sec [ Nope! ] I did some back to back testing with the stock and revised FM's and the sustained G remains about the same but the revised FM generates a higher instantaneous G due to the increased lift available at 33deg. The only way I found to check the low speed behavior was some calculated data from the CheckSix website. The test involved a very low speed turn at mach 0.22 / 133ktsIAS at 5000ft with two R-60's and 50% internal fuel. It was quite difficult to fly accurately but the best results were within +-2sec of the calculated data. The calculated data is 52sec for a 360deg turn. [6.9deg/sec] Some additional edits from the flight manual: Gear limit speed: quite high at 600kmh / 324kts. The sop's for landing call for gear down first at 550kmh/297kts then approach flap at 500kmh/270kts with full flap selected at 400-420kmh / 227kts. Flap limit speed: Not even mentioned in the flight manual and no description of the "floating flap" system! I based the flap1 speed on the sop's and the flap2 speed is the TW original. The rack weights have been adjusted using the info from the technical manual and the MiG-23 800L tank has been added as an option. Recommended take off rotation angle is 11-13deg. The manual calls for early aft stick, maybe due to ground effect issues, but I find 130-150kts, depending on weight, and 13deg AoA gives a nice lift off at the proper speed. Typical approach speeds at light weight are quite high at 180kts but that's probably due to over the nose visibility issues. The target touch down speed is considerably lower at 150kts. The canopy works with Shift0[zero] I've found the additional AoA range quite useless during dogfights due to the rapid speed loss. It's sometimes useful for evasive maneuvering but that's really a last chance maneuver, it's better to keep the speed up. An interesting document here describing the U.S. tests on a MiG-21F. https://theaviationist.com/wp-content/uploads/2013/11/havedoughnut.pdf I have read some other documents describing how skilled U.S. aggressor pilots could trick the rookies into low speed turn and burn dogfights with the MiG-21's and F-5E's but once the lesson was learned the results were much different so better not to go there. Even the ThirdWire AI will be flying rings around you! Revised FM's here: MiG21bisFMs0.96.zip I'm going to modify the light weight MiG-21F as well, it should be ready soon.
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  11. Nice looking game. Back from Sidewinder training. [unlimited weapons] DCS is more or less as expected. Steep learning curve, good flight models, and resource intensive. My new Dell G5 is probably mid range for this game but it's good enough for the old jets and light missions I'm interested in. For now it's mainly a fly around sim but will gradually work into some light combat missions. I think the F-86F and MiG-15 Bis will keep me occupied for many months!
  12. View File CF-100 MK-4B NORAD 1958 SKINS Additional CF-100 MK-4B NORAD skins for 1958-1962 ERA. INSTALLATION: Add the skin folders to the CF-100_Mk4B[NORAD] aircraft folder. 419,423,440 and 445 squadrons were in Europe during this time frame so they aren't included in this North American pack. CREDITS: 1977Frenchie Submitter baffmeister Submitted 12/13/2019 Category Other Origin  
  13. CF-100 MK-4B NORAD 1958 SKINS

    Version 1.0.0

    38 downloads

    Additional CF-100 MK-4B NORAD skins for 1958-1962 ERA. INSTALLATION: Add the skin folders to the CF-100_Mk4B[NORAD] aircraft folder. 419,423,440 and 445 squadrons were in Europe during this time frame so they aren't included in this North American pack. CREDITS: 1977Frenchie
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  19. View File CF-100 MK-4B NORAD SKINS Three additional skins that didn't fit in the CF-100 MK-4B NORAD upload. INSTALLATION: Add the skin folders to the CF-100_Mk4B[NORAD] aircraft folder. CREDITS: 1977Frenchie This package is subject to the CombatAce Modders Licensing Agreement Submitter baffmeister Submitted 11/29/2019 Category Other Origin  
  20. CF-100 MK-4B NORAD SKINS

    Version 1.0.0

    54 downloads

    Three additional skins that didn't fit in the CF-100 MK-4B NORAD upload. INSTALLATION: Add the skin folders to the CF-100_Mk4B[NORAD] aircraft folder. CREDITS: 1977Frenchie This package is subject to the CombatAce Modders Licensing Agreement
  21. View File SF2 CF-100 MK-4B NORAD This package represents the CF-100 MK-4B version as used by the RCAF in North America. The squadrons/skins were based in Canada so this pack isn't a good fit for a typical install and should only be used in a North American centered installation. The date range runs from March, 1955, until December, 1962. NOTE: Due to the large size of this upload 3 additional skins will be uploaded as a separate package. Additional skins here: https://combatace.com/forums/topic/94108-cf-100-mk-4b-norad-skins/ I'm using the NORAD suffix to avoid any confusion with the European versions although the CF-100 MK4 service introduction pre-dates NORAD by about 3 years. The skin jpeg's are quite large and I've noticed some frame rate issues when flying over Hi Res terrains but no issues over the stock terrains. The model does use distance lods. INSTALLATION: Normal installation, just copy and past the files into the appropriate mod folders. If you already have the MK-4A installed you can skip the sounds, decals, pilots [seat] and weapons except the CF-100_RP which has had a not required jpeg removed, or just remove the jpeg from the rocket pod that was included in the MK4A upload. Additional information in the ReadMe. CREDITS: Sundowner: Aircraft model, cockpit model, various ini work, some skin work, research. 1977Frenchie: Skins, decals, hangar and loading screens, research. Baffmeister: Flight model, some ini work, some research, package compilation and readme. Wilches: Beta testing and research. Crusader: Research Paulopanz: Loadout TGA [Thanks!] The Canberra_2 engine sound and Mk3 ejection seat are included but not sure who made them. There is also a CF-100windsound which I might have made but don't remember for certain. This package is subject to the CombatAce Modders Licensing Agreement Submitter baffmeister Submitted 11/29/2019 Category Other Origin
  22. SF2 CF-100 MK-4B NORAD

    Version 1.0.0

    66 downloads

    This package represents the CF-100 MK-4B version as used by the RCAF in North America. The squadrons/skins were based in Canada so this pack isn't a good fit for a typical install and should only be used in a North American centered installation. The date range runs from March, 1955, until December, 1962. NOTE: Due to the large size of this upload 3 additional skins will be uploaded as a separate package. I'm using the NORAD suffix to avoid any confusion with the European versions although the CF-100 MK4 service introduction pre-dates NORAD by about 3 years. The skin jpeg's are quite large and I've noticed some frame rate issues when flying over Hi Res terrains but no issues over the stock terrains. The model does use distance lods. INSTALLATION: Normal installation, just copy and past the files into the appropriate mod folders. If you already have the MK-4A installed you can skip the sounds, decals, pilots [seat] and weapons except the CF-100_RP which has had a not required jpeg removed, or just remove the jpeg from the rocket pod that was included in the MK4A upload. Additional information in the ReadMe. CREDITS: Sundowner: Aircraft model, cockpit model, various ini work, some skin work, research. 1977Frenchie: Skins, decals, hangar and loading screens, research. Baffmeister: Flight model, some ini work, some research, package compilation and readme. Wilches: Beta testing and research. Crusader: Research Paulopanz: Loadout TGA [Thanks!] The Canberra_2 engine sound and Mk3 ejection seat are included but not sure who made them. There is also a CF-100windsound which I might have made but don't remember for certain. This package is subject to the CombatAce Modders Licensing Agreement
  23. Life in the Danger Zone: I followed that guy around for about 10 minutes trying to get get an awesome high alpha Aphid launch screen shot but the new higher AoA capability is proving to be quite useless during dog fights. The speed loss is very rapid and any potential firing solution is gone in an instant. I was down to about 135kts when I took the screen shot. The higher AoA is sometimes useful for defensive purposes if you have a stubborn EA on the tail. The rapid speed loss can force an overshoot but the sink rate gets very high at idle power and low speed so altitude must be carefully watched. After messing up the first attempt at a Bis FM update I going to change this project to a general review and potential updates for all the MiG-21's. I think the weapon rack weight adjustments are useful and a new 800L centerline drop tank would be nice. The MiG-23 800L "stand in" is good for now but it has an oval shape and conflicts a bit with the MiG-21 landing gear doors. I found an interesting document on basic delta wing aerodynamics so I settled on an approach to use for the modified FM. I won't get into details at this point but it involves transferring lift from the outer aft to the inner forward wing panel to model the vortex break down which moves from aft/outboard to forward/inboard. According to the document, the vortex breakdown starts in the 20-25 deg AoA range. Still some testing to do but should have a Bis test FM ready before year end. Will also include a modified FM for the MiG-21F. It's over 1000kg/2200lbs lighter than the Bis so might be more effective at high AoA. Or not.
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