7
votes
What would be the minimum number of engines required to climb in a 747?
We use the polar of the 747 as given in this answer:
Let's suppose that it took off at its MTOW of 377'000kg and that the accident happened somewhere midway i.e. with half of its 198'000 liters of ...
- 5,926
6
votes
Accepted
What is the purpose of variable stator vanes in the power turbine part of a free shaft gas turbine?
When you take a turboshaft engine and subject it to large and sudden load changes, that it doesn't have to cope with in an aircraft, like during gear ratio changes in a tank, you get very sudden ...
- 117k
5
votes
Why does Engine Pressure Ratio (EPR) rise as thrust levers are pushed forward?
What makes you think the EPR should be 1.0? Note that we are using stagnation/total pressures to determine the EPR, we are not using the static pressures. Although the nozzle expands to ambient ...
- 1,564
3
votes
Why the green inside newer turbofan engine nacelles?
This is a part of the fan case and is integral with the engine - it is not a part of the nacelle.
On PW GTF engines, the fan case is manufactured using composite materials. So why is it painted green?...
- 1,992
2
votes
Accepted
Why does ITT drop drastically after startup?
Yes, the increase in airflow has a cooling effect.
- 21.7k
2
votes
What is the GE90-115b turbine power output in horsepower?
TLDR
The number given for the Trent engine is only for a specific engine component and is not representative for the total output of that engine. The 110000 hp for GE90 is plausible.
Full answer
It is ...
Only top scored, non community-wiki answers of a minimum length are eligible