Tuesday, October 20, 2015

VSKYLABS Shenyang J-15 flight performance model


VSKYLABS Shenyang J-15 flight performance model




Please read the X-Plane flying tip, down this post.

This project is still under development, and is being released now because the flight-model tuning phase is almost finished.

A 'Flight Performance model' is a project which focus on one or more aircraft flight performance aspects. My last flight performance model was the VSKYLABS IAI Kfir TC2 Turn performance flight model, which is sort of a maneuverability demonstrator.

The next aircraft to come is the VSKYLABS Shenyang J-15 'Flying Shark', which is based on the Soviet-designed Sukhoi Su-33. In the past, I've uploaded a previous versions of the SU-27/33 for X-Plane. This model is a rebuild, with a completely new flight model design, as I've decided to stretch out X-Plane's capabilities and try to design the most authentic super-maneuverability flying model.

Note: This is an upgraded J-15 model since it utilize a 3D thrust vectoring system.

A brief explanation about Super-Maneuverability:
'Corner Velocity', which also called 'corner speed' is the minimum speed at which maximum G can be obtained (at full engine power). Fly faster than it, and you can instantaneously pull to a maximum and even over-G turn (and lose energy in the process). Fly slower, and pulling all the way, will get your turn rate to drop rapidly. It is therefore desirable in combat or aerobatic maneuvering to maintain corner velocity.

In a super maneuverable aircraft, a high degree of maneuverability below corner velocity can be obtained, even below stall speed. Such an aircraft is capable of maneuvers that are impossible with a purely aerodynamic design. The ability of an aircraft to perform high alpha maneuvers that are impossible for most aircraft is evidence of the aircraft's super maneuverability.

Here is a new video I've made during the extensive flight-testing and tuning process of the model:


Flying tips for X-Plane
(and real life, if you find yourself in a super maneuverability agile fighter) :

First of all, The aircraft maximum weight is set up to a lower value in Plane Maker. The reason for that is that I wanted the aircraft to be set up on a light-weight configuration, "ready for airshow". If a maximum weight value is set up in Plane-Maker, X-Plane will put the aircraft on the runway with a heavy weight configuration (not the maximum weight but still heavy) and this is a bit heavy to "Rock n'Roll".

Second, I'm writing a post, explaining and demonstrating how to handle these kind of next-generation, Super-Maneuverability aircraft. It will be ready soon, with lots of explanation and video demonstrations.

Until then, I can recommend you to use the HUD for flying. In X-Plane's default HUD. there's a horizontal, dotted-line represents the stall-area. As you pull the stick, raising your Angle of Attack, you'll see this line coming from the upper area of the HUD. Once you proceed pulling, the line will cross the velocity vector cue, and now you are in the "Super-Maneuverability" zone. 

In order to stay alive in that zone, it is recommended to:
  • Stay with full afterburner power.
  • Try to separate vertical and horizontal inputs to the stick.
  • Getting out of this zone requires gaining speed, or extensive but controlled push of the stick, to reduce the Angle of Attack.



Have fun!

jetManHuss


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