SinusoidDelta

The F-15C control augmentation is analog. The F-15E's controls are digitally augmented and thus are easily reprogrammed. Pilot inputs are determined via strain gauges on the flight stick.

The F-15E Flight control system is semi fly-by-wire. It is quite different and far more advanced than the F-15C CAS system. Some F-15E's also have the pw229 engines which have more max thrust than the 220's overall,and significant gains in the supersonic and high altitude regimes. The 229's also eliminated the need for a vmax switch and have improved advanced DEEC with Assymmetric Thrust Departure Prevention System.

F-22 departure testing (HUD recording and external view). I think the pilot may have lost his lunch. Properly terrifying F-15 spin testing...

I agree with NeilWillis. It's probably an iteration of the current FM. I'd love to see a DCS F-15C but I'll be content if they just correct the ARI issue soon.

Not to derail the thread but the F-15E with the 229's does quite well.

Here are the performance charts I posted in the Max Cieling thread:

Below are charts for the PW220, clean, with and without pylons. Clean Airplane (No Pylons / No Launchers) Clean Airplane (3 Pylons / 4 Launchers)

I don't know what OP's loudout is but see my screenshot for what is possible.

I agree that the F-15 is a stable jet until it isn't. The Bitburg Roll is somewhat similar in nature to the TRO problem in DCS. I don't know what is considered "insane uncontrollable rolling" but 60 deg./sec IRL sounds pretty damn close. Regardless, I have no idea what the true nature of departure/autoroll susceptibility in the transonic regime is with weight and aerodynamic asymmetries. If this information exists, please direct me towards it. I only know a lot of research was performed in an attempt to quantify what factors increase departure susceptibility and I doubt it was done for s's and g's. Regarding the lateral weight asymmetry, I would gladly "test it out" but I don't know how with any degree of certainty. It's kind of a critical detail for a flight simulator, I really would appreciate if you could find out. Is there any way to log advanced telemetry? It'd be invaluable to make excel plots of inputs vs control surfaces, CAS authority, yaw acceleration, sideslip, etc. especially with different loadouts. There are a considerable number of potential virtual "test pilots" here. The community could help quantify and analyze these flight model issues and take some of the burden off ED. Just my .02 cents. I'll get off my pedestal now. :music_whistling:

I don't understand. Was this an example of "parts not meeting the drawing" so to speak?

TwinScroll USA F-15C

The F-15 had some serious issues with departure from controlled flight. The Bitburg Roll is one example. There are some great research papers on the topic. Does anyone know if the F-15 in DCS is modeled true to life with an inherent right wing heavy 1,700 ft*lb asymmetry?

Correct me if I'm wrong but the -220's offered better reliability at the expense of having slightly less maximum thrust than the -100's.

Sorry, I misunderstood you're original question. If the pitch and roll axes are mixing, deadzone in DCS could help. Curvature will smooth the transition coming out of the dead band. What settings have you tried? With my Logitech 3D Pro I used a deadzone of 10 and curvature of 20 on pitch and roll. Regarding the throttle axis, are you not reaching 100% throttle at full stroke? Or are you trying to tune the afterburner detent? If it's the former then simply lower the X saturation. It will reduce the amount of control input required to get 100% in-game. As SDsc0rch said, it's trial and error.

Axis curvature may not be very effective for your particular joystick setup. Input spiking when breaking out of the deadband sounds like a typical characteristic of a potentiometer control. That being said, your hardware converter has a low pass filter but this only takes out high amplitude, short period inputs. I imagine there is some freeware available to further filter the input and ideally smooth out smaller transient spikes.

I just started having this issue today out of the blue. I tried resetting my PW and now my forum PW login changed but the ED website says it's incorrect. I still get the "cannot connect to master" prompt at MP login. So now it seems like changing my PW only further complicates things. I own the steam version so I'm running another integrity check. It looks like I won't be playing online for quite a while as this issue has no clear fix that I'm aware of. I've done every possible countermeasure on the boards. This is very frustrating. The issue was 2 conflicting versions of sweetFX. I wouldn't have expected it to interfere with MP connectivity. :doh:

I use FTNOIR with a 3 point model with 940nm LED's, 3 resistors, a 3.7v Li-on battery, and a PS3 Eye camera. Removal of the IR filter was easy but it shifted the focal length of the camera to about less than 5 inches away. This made tracking anything impossible. The solution was to remove the lens assembly from the camera again and very carefully sand the base portion that mounts to the CCD imager. That corrected the focal length and the setup works flawlessly now. It less than $40 in parts. Is it worth the time and effort to go the DIY route? I can only speak for myself and the answer is yes. TrackIR is a wonderful "turn-key" solution but IMO it's appreciable performance benefit from my DIY setup does not justify the price tag.

Just to clarify, specifically which switch is not working?

Hold the S key while turning to unlock the steering nose gear. And be careful not to barrel roll across the Tarmac.

1) That is incorrect, see the climb profile below. 2) The performance figures of the streak eagle can not be used as reference for the F-15C. IIRC the streak eagle had 3,000lbs of equipment removed(not fuel). Thats basically the weight of a car it didn't have to haul up to 40,000 feet. :huh: What is a moot point? Unless you typed something incorrectly mach 2+ is not possible at 1500 feet. It is only possible at altitude. The doghouse plot below is taken directly from the DCS F-15C manual. Press 2 on your keyboard. Look in the lower left of your HUD. That is your mach number. You must know your mach number at all times to stay within the flight envelope.

My best guess is that they modeled the ram air effect; a small yet considerable power increase as speed increases.

Perfect landing.

I've been using FTNoIR for a while now. At first I was using only face tracking with webcam app on my smartphone. I was blown away at the accuracy. Occasionally it would lose track, setup was a hassle and having a beard or any facial hair ruins the face detection. So, I went out and bought a PS3 Eye Toy. Using face-tracking the PS3 camera was actually worse than the smartphone webcam app. I decided to give IR a shot and Macgyver my own 3-point IR tracker for less than 10 dollars in parts from radio shack. Even with 940nm IR LED's the tracking was basically impossible due to the IR filter in the PS3 camera. (at least on my version) Moving forward, I decided to remove the IR filter from the camera. After a frustrating few hours I had the filter removed and had the camera reassembled. Not a single spec of dirt on the imager! I picked up my IR tracker, aimed it at the camera and... the image looked like a glaucoma patient's vision. It was extremely washed out, distorted, and totally useless for tracking anything. Upon further inspection I realized the focal point of the camera had shifted, by a huge amount. The image would focus crystal clear, only approximately 3 inches from the lens. Googling turned up some pretty insane countermeasures and most insisted it was a lost cause. After deep meditation, I realized that the removal of the IR filter had upset the focal length and the solution was simple. Either move the lense assembly forward or backward from the imager. Reluctantly, I disassembled the camera again but left it plugged into the computer. I tried shimming the lense slightly outward and realized the focal point was only getting closer. So, I grabbed a piece of 800 grit sand paper and very, very cautiously sanded the base of the lense housing, frequently checking the focal point. It didn't require much sanding at all and voila! It was fixed, objects on the other side of my room were in focus. Now I could finally try my IR tracker that had been collecting dust. Honestly, there is no comparison. Point tracking is incredible. Face Tracking is very impressive and will preview the feeling of immersion and added SA. Unfortunately, without stereoscopic cameras, face-tracking can't hold a match to IR point tracking. It is extremely intuitive, you look in the direction you want and thats it. It's like trying to convince someone in the not too distant past why they need the internet or a smartphone. Until you try it, you'll never understand.

I only experience the roll issue in single player, multiplayer is fine (aside from the fuel bug). I'll have to confirm when I'm off work.

The rectangles aligned vertically are displaying the azimuth of a radar jammer detected by the F-15's radar. You can position the TDC over the strobe and lock it to enter Home On Jam and the VSD will display HOJ. This mode only gives you the targets azimuth and does not tell you altitude, range or if the aircraft is friend or foe. When you get close enough (approx. <20nm) your aircrafts radar is able to overcome the noise of the jammer and the target will be displayed on the VSD, this is called Burn-Through. Hopefully that helps you a bit. I'll leave the other questions to the real experts. :thumbup: