F-15 A-D.
Yes, the F-15, like the F-4, F-5 or F-14, uses Units AoA. The conversion to actual AoA is different for each of those aircraft. In the F-15, the conversion is not linear. But we can say that 30 True AoA is roughly 40 CPU- Cocpit Units.
The SOS system is configured to trigger (push off the control stick of the aircraft) when maneuvering with the wing tips released-at an angle of attack of 26 degrees…
In all cases, for the MiG-29, the handle can be squeezed (broken).
3.The angle of attack with the SOS running is 30 degrees (without roll control).
The angle of attack with roll control is 26 degrees…
I mean, I besides the Instructor being the bloody garbage that it is and @skilz2kil bug report on SEP, MiG-29 should be pretty accurate, although it will face UFOs, right ?
The interesting difference between the MiG 29 and the F-15 is that the MiG 29 uses a Pitch-kicker system, the F-15 has no such system to limit the stick but aerodynamically gets buffet and wing rock which will limit the pilot, but can get above 40 AoA if the pilot knows where and how.
Again about the F-15…
For some reason you want to “fit” the F-15 to the desired figure of 30 degrees, this is not quite true…
Once again, read the limitations in operation for the early F-15, 30 units were installed, not 30 degrees…this is about +/- 22 degrees of true AOA…
Since there is no book on aerodynamics for the F-15, you need to pay attention to secondary documents…
How the F-15 can fly with an angle of attack of 30 degrees…In most cases, this is a straight-line flight (without roll and yaw control), that is, it does not maneuver (rehim CAS On)…
Spoiler
We are not interested in such a flight…we know for sure that the 9-12/9-13 limit of 26 degrees is set in maneuvering mode (SOS On mode)…
You can fly it with impunity at 30 AoA units at any weight and symmetric-asymmetric load. Beyond it depends on type of maneuver and symmetric-asymmetric load but you can take it to 45 AoA units depending how you are.
On the F15, AoA (°) + 10 = AoA units
There’s no limit but forces increase slightly on it.
testing units. But operationally has no such limits
look at the F15D charts above. Pull up manauever data exists aswell. Not straight line and ROLL CAS off.
It has no maximum AoA with CAS on
In fact, due to how it’s designed the FCS inputs are reduced, Yaw and roll are washed out to prevent inputs that would induce spins from them acting funky.
The F-15 had a more advanced flight control system than the MiG-29. The MiG-29’s pitch kicker could be exceeded, had the F-15 not had such an advanced FCS the limited would likely have been lower as well. As they said, they think they can open the limits up more in the future and surely they did. Even aircraft without airframe design made purely for aerobatic flights such as the F-35 can do post-stall maneuvers with full control of when they enter / exit the stall and without significant departure symptoms or instabilities almost purely thanks to the modern FCS.
The limit of 30 units of AoA was at the time when the AoA properties were tested. A little later it was raised to about 35-40 true AoA in the mid-1970s.
So YOU all came to the conclusion (which I wrote about earlier) at the beginning of the controversy on this issue…
Do not refer to the figure 26 degrees (SOS On) for the MiG-29, it can be 30 degrees (SOS Off)…
2.The F-15 can also be 30 degrees (CAS Off) and there is not even a need to delve into the details of CAS operation…because all maximum angles of attack are obtained in CAS Off mode…in fact, CAS Off…
In reality, the MiG-29, as well as the Su-27, there is no need to reach maximum angles of attack, because they are more maneuverable than the F-15… https://youtu.be/8bWTnqp1AFg?si=bSLVfiLQg7iX3kvw
CAS is not disabled by the pilot, why would he do that ? CAS allows the pilot to fly the aircraft more safely and achieve a higher AoA. Maybe the misconception has gotten in here that when an F-15 goes into a spin the CAS portion of the controls disengages itself to allow the pilot to bring the aircraft out of the spin, but a lot of other aircraft have that. In the MiG 29, the F-15 has a similar downward roll with increasing AoA, achieving similar AoA at low speeds. While the MiG 29 limit at 26 AoA is more pronounced, the roll kicker must not be exceeded ( written in the MiG 29 manual). The F-15 can reach up to a true stable AoA of 35+ with CAS on. Depends on configuration, speed, altitude, etc.
I don’t think the Mig 29 is more controllable than the F-15 at higher AoA, it will be close together.
CAS will allow the aircraft to be flown more precisely and safely. CAS has its own logic to set more, less or no control surface deflections. Thanks to CAS the pilot can achieve slightly higher AoA than if CAS was off. The CAS is turned off by the pilot sometime in the first familiarization flights on the F-15, when it is necessary to become familiar with how the aircraft will react if the CAS is off. Otherwise, it is left on.
CAS switches off automatically on spin, the pilot has direct control to recover the spin