Shepski

The AI SU-27 will fly with leading edge slats extended dependent on airspeed and not angle of attack. With the AI in formation with the player flown Su-27 the AI will have slats extended at speeds under 700 km/h IAS. Once they reach 700 the slats will retract. This bug causes excessive drag and fuel burn for AI aircraft which impacts missions because they will run out of fuel well before the player. The slats logic for AI Su-27s should be based on angle of attack and not airspeed.

The wingman(AI) will fly with slats extended up to about 700 km/h indicated airspeed which will create a lot of extra drag and will make him burn more fuel. Until this bug is fixed make sure you fly at 700 or greater with him in formation.

Definitely shows what it was designed for, low speed and higher alpha maneuvers! In DCS I feel there is too much rudder movement at higher speeds where it really shouldn't be noticeable and this in turns moves the nose around too much with the rudder deflection and then rebound back to neutral.

As am I! :) I have time behind the wheel of high performance go-carts and and single seaters and once you get used to the rapid acceleration/deceleration and cornering G they aren't all that hard to drive. After that it becomes all about timing with braking and turn in points. I have found the cause of my biggest issue with the FM and it's because the flight stick interconnection with the rudders is over done which is causing all the nose bobbing and longitudinal instability.

Su-27 PFM Flight Model Longitudinal Axis Instability Bug When you roll the jet the nose moves to much about it's longitudinal axis with a rubber band like motion. The reason this happens is due to the stick/rudder interconnection. When you move the flight stick from side to side the rudders move with it. This causes the nose to move laterally to the left when you roll the jet to the left and then when you stop the roll with right stick movement the nose then moves laterally to the right then back left to re-center. Watch in an external view and move the stick back and forth laterally and you can see the rudders moving too much. The interconnection between the flight stick and rudders is over done at higher speeds as this system is designed for low speed and high alpha stability.

I have found out why the nose moves around so much with control stick inputs, which has been my main beef of the PFM... When you roll the jet into a flaperon roll the rudder kicks the nose into the roll and when you stop the roll the rudder kicks the nose the opposite direction. flaperon/rudder interconnection is over done. To see it in action just go to an outside view looking at the tail and move the stick from side to side and you will see large rudder deflections. Once this is fixed and the flaperons less affected from rudder deflection the jet will be much more stable about it's longitudinal axis!

Having several Flanker books and a video on the design, development, and chronology of the Su-27, reading and listening to interviews by test pilots and demonstration pilots the way they describe flying the real jet is not what we have in the DCS Flanker. Some quotes by pilots were "best aircraft they ever flew", "Flys like a dream", and "very easy for the pilot". Just watch some Youtube videos of in-cockpit footage when the jet is pushed around and you can see how stable it is. I'm looking forward to flying *that* jet in DCS!

If this was how it was designed IRL it never would have been approved by Sukhoi to go into production. It feels like there are rubber bands attached to the nose and when you pitch down the band wants to pull it back up. When you roll the nose wants to bob up and down like it's being pulled by elastics. Try the single mission "River Run" and see how stable the jet is when doing simple bank and pulls to get through the gates. Note: Increase your altitude in the mission editor prior to running the mission. I set 600m and and increased speed to 420. Like I said I will play with the axis curves.

The bouncy nose is not accurate for any aircraft be it prop or jet. I think adverse yaw is over modeled and really shouldn't even be present with a modern aircraft with flight control computers. It should be much easier to trim in pitch for stable flight. I'm hoping it is still very much a work in progress with tuning to come. I'm using the curves at 5 FWIW since YoYo recommends none. I'll play with more curve and see what happens. I'm very, very impressed with the Mig-21 and feel it may be the best of the DCS flight models yet.

After flying the Mig-21 which is a very stable platform the Su-27 is too pitch happy and the nose bounces around all over. The PFM still needs work to stabilize it. They really should bring the stability of the Mig-21 to the Su-27.

Happy New Year too! Wow 20 years and we can now fly the Flanker that we saw in Eagle Dynamics rendering videos from back then... only 20 years to get here but still waiting for the full on DCS: Su-27SM which I have always hoped would be their first hi-fi fast jet release. When I have time I'm really enjoying learning the Mig-21Bis... incredible detail and I had to get the F-86 Sabre too. :) Eagerly waiting on the Spit! I hated seeing my old TM Stickworks FLCS/TQS go obsolete and now have a CH Fighterstick/Pro Throttle and other than ease of programming I'm not happy with the soft feel and accuracy of the stick but it works for the limited time I have for flying. Cheers!

Hi Rich! Hope all is well with you and your family! I just found out the tire suppler for the Flanker needs to be changed. Locked up and blew both tires while taxiing! Hi George!

Hey Goran! I just got back into this now that the Flanker has had some real attention. Other than autopilot wobbliness and some pitch anomalies our beloved Flanker is most excellent. I just flew a mission in the "Fortress Mozdok" campaign and in one sortie downed 4 F-16s. 3 with ERs and 1 with an Archer. I always wait for RTR to launch and they seemed to be ok. The Flanker cockpit, external model, and the sounds are amazing! I also got the Mig-21 which is a real masterpiece but needs some big engine sound improvements. It's nice to be flying again! Cheers, Mark

GTX 660 Ti FTW

This worked! Thanks for the help guys!

I tried this but get a completely black cockpit.

Smoke would never be there because it would be blown back so it should be removed and the dirty canopy is too much. Hard enough to see tiny Migs through a clean canopy.

Great video and triangulation works great but now the SA-15s shoot down the Mavs so you have to launch a volley at them.

Most likely there is suction feed in the event pumps fail.

I never flew F3... my first PC was a win 95 box and the first software I put on it was Su-27.

Sure is! Probably the difference is North American and European retail versions.

Fore sale on Ebay: http://www.ebay.com/itm/SSI-1995-PC-CD-ROM-Game-Box-Set-SU-27-FLANKER-w-Strategy-Guide-NEW-SEALED-MINT-/370793126515

Here's the original:

Captain Chaos! Hi Bas! What a fantastic time we had in Apeldoorn! I hope all is well! Another blast from the past: Big Bear 1998... http://www.combatsim.com/review.php?id=432

Very nice work Paul! Thank you!