FLYBOYJ
"THE GREAT GAZOO"
Taxi time? And you're running up each engine individually so multiply that by 4 and consider the other 3 engines sitting there at idle
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I've already explained that the one minute referred to the TO run alone. I assumed this would be obvious as this is when the engines are going to be running at full throttle.
Warm up for ten minutes = about 1-1.5GPM/engine or about 40-60IG and then 1 minute max power for TO = 1/60 x 500IG/hr = 8.3IG and then we get between ~50-70IG
You won't get all 4 engines even started in one minute.
I've already explained that the one minute referred to the TO run alone. I assumed this would be obvious as this is when the engines are going to be running at full throttle.
Warm up for ten minutes = about 1-1.5GPM/engine or about 40-60IG and then 1 minute max power for TO = 1/60 x 500IG/hr = 8.3IG and then we get between ~50-70IG
Taxi time? And you're running up each engine individually so multiply that by 4 and consider the other 3 engines sitting there at idle
Again, how long do you have to run the engines at full throttle to burn 20% fuel? This is a straightforward question.
You're trying to argue that WW2 combat mission were impossible because they had to burn 20% of their fuel before TO.
Again, how long do you have to run the engines at full throttle to burn 20% fuel? This is a straightforward question.
Yeah, but you are burning fuel before then. Make yourself more clear, before you get snarky with people for no reason.
Fine. Now please answer the question: How long do you have to run the engines at full throttle to burn 20% of the fuel?
And this is a straightforward answer. I'm not saying fuel burn is 20%. Care to show me where I did? Thats a straightforward question. Knock it off with the snarkiness.
OK, if fuel burn isn't 20% then why not take issue with that statement? The fact is that no matter how you cut it, fuel burn up to TO will be ~2%.
OK, if fuel burn isn't 20% then why not take issue with that statement? The fact is that no matter how you cut it, fuel burn up to TO will be ~2%.
With aircraft that are heavily laden, around 20 percent of their total fuel load is used just to get off the runway (a value roughly calculated in a class exercise using a 747, its total fuel load and its MTOW versus its speeds and acceleration).
Hello, where did I say 20%????
Also remember for what its worth, takeoff power does not stop once the wheels leave the ground. You have to think of climb out too.
Note to a specific person: no mention of 20% fuel burned.
I do not know if this will help?
In some of the Bomber Command operational records I have found, the usual time on the ground from engine start to the start of the TO run was considered to be a minimum of 20 minutes for bombers operating in formations. However, the planners were supposed to use a ground time running of 30 minutes as a minimum to take into account that not all WUTOs went according to plan.
Where did I say you did? I am asking a straightforward q
Do you agree with this statement from post 533?
"With aircraft that are heavily laden, around 20 percent of their total fuel load is used just to get off the runway..."
Where did I say you did? I am asking a straightforward q
Do you agree with this statement from post 533?
"With aircraft that are heavily laden, around 20 percent of their total fuel load is used just to get off the runway..."