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20 votes

Cruise with a single engine in a twin, good idea?

A twin engine aircraft with one engine operating (OEI) suffers considerable drag penalties. First, there is the drag of the windmilling engine. Since the engine is likely out on the wing, it causes ...
Rob McDonald's user avatar
  • 13.5k
11 votes

Where does Air Force One refuel?

The VC-25A (which is usually used as Air Force One) can definitely make the trip from Washington D.C. to Athens in one fuel tank! I think the longest the VC-25A has gone without refuelling is from ...
Nam Ba Vo's user avatar
  • 121
8 votes

How diesel fuel is injected into the cylinder of a diesel engine?

The fuel is injected at the top of the compression stroke, timed as you would time the firing of a spark plug. The fuel starts to burn as soon as it atomizes in the combustion chamber due to the ...
John K's user avatar
  • 132k
7 votes
Accepted

WWII fuel gauge: single needle and dual range

That looks like an animated cockpit, and if i was a betting man Id say that someone googled "german airplane gauges" and didn't know what they are looking at. The labeling on the spectrum is ...
Dave's user avatar
  • 101k
5 votes

What are the standard numbers for fuel consumption (kg), kg/NM, and kg/h, of Boeing 737-300?

There are charts out there, but the rule of thumb is 5,000 lbs per hour average for a flight. The first hour is more given the higher fuel flow at takeoff & initial climb, but as an average that's ...
Ralph J's user avatar
  • 51.8k
4 votes

Do fuel tanks need to be pressurized?

Fuel tanks don't need to be pressurized, though they can be. Unpressurized tanks are vented to the atmosphere, and so a large pressure difference never develops in the first place. In pressurized fuel ...
Chris's user avatar
  • 16k
3 votes

Why wasn't MH-17 flying at 33,000ft before it entered Ukrainian airspace?

In addition to the other answers, they didn't have to either. As can be seen in this visualisation made by the Dutch Safety Board, the restrictions at that time concerned the eastern part of Ukraine; ...
SQB's user avatar
  • 2,275
3 votes
Accepted

Cruise with a single engine in a twin, good idea?

Using actual numbers, a modern A350 at fairly heavy weight of 250 tons will have a specific range (distance travelled over burnt fuel) of approximately 77NM/1000kg at optimum cruise altitude of ...
busdriver's user avatar
  • 3,340
3 votes

What are the standard numbers for fuel consumption (kg), kg/NM, and kg/h, of Boeing 737-300?

You can look at the appropriate airport planning document. Airline manufacturers make them available. It contains a ton of information, you'll want to check out the payload-range diagram. For the -...
Rob McDonald's user avatar
  • 13.5k
2 votes
Accepted

How diesel fuel is injected into the cylinder of a diesel engine?

maybe a gradual injection of fuel during the power stroke will be helpful That is correct. Modern diesel engines inject fuel gradually. The main purpose of this is to ensure a slower burn of the fuel ...
user71659's user avatar
  • 6,636
2 votes
Accepted

Approved Mixtures of Fuels in ROTAX 912 Engine

Right in the document you linked: Fuel For ROTAX® aircraft engines different fuel types are available. See Operators Manual of the relevant engine type This means the specific manual for a specific ...
Max Power's user avatar
  • 2,604
2 votes

Diesel engines market share in Piston Airplanes market

It's about 5%, very approximately, but might be approaching 10% in the EU. https://www.experimentalaircraft.info/homebuilt-aircraft/aircraft-diesel-manufacturers.php - overall list https://www....
Therac's user avatar
  • 27.6k
1 vote

Are auxiliary fuel tanks optional on the Boeing 737 Max 9?

Aux fuel is optional on the Max 9, but to find out who has ordered aircraft with and without you will have to coax that information from Boeing or the airlines operating them.
Juan Jimenez's user avatar
1 vote

On the A321neo, what determines the 'time to land' when an Additional Center Tank System Fault is triggered?

The reason for that flight time is due to the CG limitations. I don't have data from the 3 ACTs, but I found this revision of the AFM document of the A321 with 2 ACTs from FAA regarding this (link). ...
ocirocir's user avatar
  • 1,972

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