# Question: What is the mass flow rate of a jet engine?

Contents

## What is the rpm of a jet engine?

An airplane׳s engines often run faster than its propellers. For example, on one airplane, the most efficient engine speed is 3,000 RPM, while the most efficient propeller speed is about 1,500 RPM. A set of reduction gears permits the engine to run at 3,000 RPM while the propeller turns at 1,500 RPM.

## How much force does a jet engine produce?

“Todays jet engines commonly develop 9,900 pounds of thrust or more.” “Jet Engine.” Encyclopedia Americana. New York: Anderson, 1996: 51. “It was strictly an experimental aircraft, but von Ohains engine of 838 pounds of thrust pushed the HE 178 to a maximum speed of 435 miles per hour (700 km/hr).”

## How do you calculate volume flow through mass flow rate?

Divide the mass flow by the density. The result is the volumetric flow, expressed as cubic feet of material. An example is: 100 pounds (mass flow) / 10 pounds per cubic foot (density) = 10 cubic feet (volumetric flow).

## How do you calculate mass fuel flow rate?

Mass flow rate can be calculated by multiplying the volume flow rate by the mass density of the fluid, ρ. The volume flow rate is calculated by multiplying the flow velocity of the mass elements, v, by the cross-sectional vector area, A.

IT\'S FUNNING:  Question: How long does it take to replace a condenser in a car?

## What is the difference between mass and mass flow rate?

Volume flow rate is the amount of volume flowing through a cross-section. Mass flow rate is the amount of mass passing through a given cross-section.

## How many horsepower is a 747 engine?

The power per engine for the two aircraft is seen to be 14 984 horsepower and 1646 horsepower for the 747 and Super Constellation, respectively.

Characteristic Lockheed 1049G Boeing 747
Number of engines 4 4
Total cruise power, hp 6 585 59 934
Power per engine, hp 1 646 14 984
Dry engine weight, lb 3 675 8 600

## What rpm is 777 engine?

The GE90—installed on some Boeing 777s—is typical in that the fan stage (N1) rotates at a maximum of 2,550 RPM while the compressor stage (N2) rotates at a maximum of 10,850 RPM. The blade tips, at 11,000 RPM, are well above Mach 1, which partially accounts for the high noise levels of a jet engine.