I keep having engine 2 failure. its happening on flights when im above FL200. ill be at IAS 190 or so TRQ of 1000 with N at like 95. Now i know im running the engine hard but tempts are all in the green. so does it just not matter that temps are in the greens and im just running it to hard or is there something else im missing? I dont have the problem when im running at lower altitudes when I can keep the N down.
I'm a mech eng., but my background is more on the structural / systems / robotics side of things. I've been wondering about using a turbine in a serial hybrid car, instead of a gasoline IC engine, like in a Prius, for example. It seems to me that a steady-state engine would be preferable for electric generation in a series hybrid system since the battery can act as an accumulator for the system.
I was also under the impression that Brayton cycles were more efficient than Otto cycles, but after a bit of digging, I found I was wrong. The thermal efficiency of the Brayton and Otto cycles are the same for the same compression ratio, with the advantage of the Brayton cycle being able to operate at lower temperatures and the advantage of simpler cooling but the disadvantage of the engine seeing high temperatures all the time instead of in bursts.
What other factors am I not considering?
I couldn't find information on other factors since it is in that weird middle ground on Google where it's not common knowledge and it's not hyper specific.
Is it a power density consideration? Is it a pollution issue? Is it fuel consumption rate? Is it not practical to retool an entire production line when you already make a sufficiently good engine?
Thanks in advance for helping me with this thought experiment.
There have only been 3 mass produced tanks that use gas turbines, the Stridsvagn 103, T-80, & M1 Abrams & 2 proposals for gas turbine engines in the Panther & Conqueror. Out of those only the Americans only ever stuck with them, with Russia, Ukraine & Sweden abandoning the gas turbines with the T-90/T-14 & Stridsvagn 122 & most Ukrainian upgrades of the T-80 using a diesel. Why is this?
I was hiding and waiting for this T-80 to pass and I could hear it's engine from like 200m away allowing me to pin point it's exact location accurately. Meanwhile I didn't even notice that there was a Leo 2a4 right behind me 50-100m away.
So this question I've been wondering for a while and my instructor wasn't able to answer properly. He just said, you won't be able to fly forever, but didn't elaborate much.
Basically, if I have 100 KTS headwind and my stall speed is 50 KTS and I have an engine failure, I should be able to fly forever assuming the headwind stays? I should even be able to climb!
Please explain with engineering terms if possible OR with free body diagram. I will understand better :)
I know it sounds silly but I’ve been in this 2 years now and have never drained or seen oil drained from a turbine. Is it just not needed since they just burn it and get serviced?
Could it be time for the water pump to finally be failing in me? Car has 167k miles on it. CEL is on as well. All this just started happening about 2 months ago. Coolant temperature also rises above the halfway point between H/C.
