YE-4 | MiG-21's true predeccessor
Fact for 3/6/2021
FACTS
Mikulin AM-11 turbojet, including addition of a second hydraulic system
![](https://assets.zyrosite.com/cdn-cgi/image/format=auto,w=392,h=240,fit=crop/m5KjPzpGVzcqvJby/Ye-dWxPgBD045CeZ3Na.jpg)
![](https://assets.zyrosite.com/cdn-cgi/image/format=auto,w=382,h=234,fit=crop/m5KjPzpGVzcqvJby/Ye-dWxPgBD045CeZ3Na.jpg)
Design and Features
![](https://assets.zyrosite.com/cdn-cgi/image/format=auto,w=600,h=368,fit=crop/m5KjPzpGVzcqvJby/mig-m7VyX5OkD4sq8XBE.jpg)
![](https://assets.zyrosite.com/cdn-cgi/image/format=auto,w=382,h=234,fit=crop/m5KjPzpGVzcqvJby/mig-m7VyX5OkD4sq8XBE.jpg)
It was a lightweight fighter, achieving Mach 2 with a relatively low-powered afterburning turbojet, The fuselage is semi-monocoque with an elliptical profile. The air flow to the engine is regulated by an inlet cone in the air intake.
For speeds up to Mach 1.5, the cone is fully retracted to the maximum aft position. For speeds between Mach 1.5 and Mach 1.9 the cone moves to the middle position. For speeds higher than Mach 1.9 the cone moves to the maximum forward position ,When ejecting, the SK-1 ejection seat connects with the canopy to make a capsule that encloses the pilot. The capsule protects the pilot from the high-speed airflow encountered during high-speed ejections. After ejection, the capsule opens to allow the pilot to parachute to the ground, On both sides of the nose, there are gills to supply the engine with more air while on the ground and during takeoff , The YE-3 uses a tricycle type undercarriage
History
![](https://assets.zyrosite.com/cdn-cgi/image/format=auto,w=496,h=496,fit=crop/m5KjPzpGVzcqvJby/img-AE0Vgabp0XfV5VPg.jpg)
![](https://assets.zyrosite.com/cdn-cgi/image/format=auto,w=382,h=382,fit=crop/m5KjPzpGVzcqvJby/img-AE0Vgabp0XfV5VPg.jpg)