Odessa Posted March 25, 2022 Posted March 25, 2022 Good day. I am still playing tutorials and some simple missions. But I have constant problem with left engine (never happened with right engine yet) Left engine just stops, rps goes to 10%, no thrust. I cannot start engine in midair. Fuel gauge is OK. May it b after some "bad" maneuvers? Could anyone please give me a hint? Thank you
Sacarino111 Posted March 25, 2022 Posted March 25, 2022 2 hours ago, Odessa said: Good day. I am still playing tutorials and some simple missions. But I have constant problem with left engine (never happened with right engine yet) Left engine just stops, rps goes to 10%, no thrust. I cannot start engine in midair. Fuel gauge is OK. May it b after some "bad" maneuvers? Could anyone please give me a hint? Thank you HI. The F-5 has a diferential fuel Gauge, for left and right engines. In the right hand vertical console, underneath where the fuel pumps are, you have a switch to use more fuel from one or another depot. Once the engines are running, put the lever to the left position and the system will compensate for the differnet weights on the fuel depots. Maybe you thought the fuel was ok, but you where seeing the Right engine fuel indicator, not the Left one... Also, don't forget to set the fuel pumps on on both sides. Saludos. Saca111
=475FG= Dawger Posted March 25, 2022 Posted March 25, 2022 In certain conditions, negative G will cause the engine(s) to flameout. 1
Odessa Posted March 25, 2022 Author Posted March 25, 2022 Thanks for advice. No track - And now I cannot reproduce it It is not a bug I think. More likely I use engines wrong. Throttle full forward. next second full back, then full forward again and all this during hi G aerobatics And when I tried "engine start in air" probably I did not get proper flight parameters Just wanted somebody confirm that "F-5 it is not a robust and reliable A-10 so be gentle"
Sacarino111 Posted March 26, 2022 Posted March 26, 2022 9 hours ago, Odessa said: when I tried "engine start in air" probably I did not get proper flight parameters Hi. For a non assited start, I think you need almost 70% throttle in the other engine. Try that. Saludos. Saca111
Odessa Posted March 27, 2022 Author Posted March 27, 2022 I had 100% of another engine. I think speed was not right. I was slower than 250.
Sacarino111 Posted March 27, 2022 Posted March 27, 2022 2 hours ago, Odessa said: I had 100% of another engine. I think speed was not right. I was slower than 250. HI. Could be, but in ramp, with 0 airspeed, you can start the other engine with 70%+ in the runing one. Maybe you forgot to press the correct idle/start and cut off buttons before trying the restart. Saludos. Saca111
=475FG= Dawger Posted March 27, 2022 Posted March 27, 2022 4 hours ago, Sacarino111 said: HI. Could be, but in ramp, with 0 airspeed, you can start the other engine with 70%+ in the runing one. Maybe you forgot to press the correct idle/start and cut off buttons before trying the restart. Saludos. Saca111 Cross bleed is only available from the left engine to start the right engine and it only works on the ground. There is no cross bleed start available when airborne. For airstart, the critical factor is the windmilling engine RPM. 250 KIAS should get you in the middle of the start envelope but the engine can relight between 12 and 25 % windmilling RPM from sea level to 6000 feet. Above that the envelope narrows, with it reduced to 17 to 24% at 25,000 feet. Above that and you are out of the envelope.
Tiger-II Posted March 27, 2022 Posted March 27, 2022 Sounds to me like you didn't balance the fuel tanks as described further up this thread. The fuel tanks are two cells in the fuselage; forward and aft tanks. One is smaller than the other, but each engine draws fuel from each tank separately. As a result, you need to balance the tanks, but this must only be performed in flight. 1 Motorola 68000 | 1 Mb | Debug port "When performing a forced landing, fly the aircraft as far into the crash as possible." - Bob Hoover. The JF-17 is not better than the F-16; it's different. It's how you fly that counts. "An average aircraft with a skilled pilot, will out-perform the superior aircraft with an average pilot."
Odessa Posted March 28, 2022 Author Posted March 28, 2022 Thanks everyone for advice. Negative G with my full throttle forward - full back every second probably stalled the engine. I could not restart it probably because I did not have enough speed... I definitely use fuel balance because it was training mission and it said "Switch that thing" I do not remember if I was I was slower than 250 KIAS but definitely slower than 300
Recommended Posts