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What is the ideal thrust to weight ratio?
Acceptable Thrust to weight(rocket and installed motors) ratio: A minimum ratio of 5:1 is typically required. This can be as low as 3:1 at the RSO’s discretion.
Is a high thrust to weight ratio good?
An aircraft with a high thrust to weight ratio has high acceleration. For most flight conditions, an aircraft with a high thrust to weight ratio will also have a high value of excess thrust.
What aircraft has the best thrust to weight ratio?
J85
For many years, the J85 had the highest thrust-to-weight ratio (8:1) of any jet engine in aviation. Let’s just call it “The Little Tough Guy.”
What is thrust to power ratio?
The inverse of power-to-weight, weight-to-power ratio (power loading) is a calculation commonly applied to aircraft, cars, and vehicles in general, to enable the comparison of one vehicle’s performance to another. Power-to-weight ratio is equal to thrust per unit mass multiplied by the velocity of any vehicle.
How much thrust does a 747 have?
Boeing 747 Specs Table
| Boeing 747 100 | |
|---|---|
| Maximum Takeoff Weight (MTOW) | 735,000 lbs 333,400 Kg |
| Maximum Fuel Capacity | 48,445 US Gal. 183,380 Litres |
| Engines and Thrust | Pratt & Whitney JT9D-7A Thrust 46,500 lb (20,925 kg) Rolls-Royce RB211-524B2 Thrust 50,100 lb (22,545 kg) GE CF6-45A2 Thrust 46,500 lb (20,925 kg) |
| Boeing 747 100 |
How much thrust do I need?
General rule of thumb: you need at least 2 lbs. of thrust for every 100 lbs. of fully-loaded boat weight (people and gear included). If things like wind or current are major factors where you fish, you’ll want a little extra thrust.
Can a 747 fly inverted?
The scene, a Hollywood masterpiece of special effects, has people asking can an airliner fly upside down. The answer is yes for a “little” bit! Unlike military fighters, commercial planes do not have the engine power for sustained inverted flight and rely on lift from the wings.
How much thrust does a 747 take off?
What speed does a Boeing 747 take off at? A fully loaded Boeing 747 ‘Jumbo Jet’ on a normal long haul flight would take off at a speed of around 160 knots which is 184 mph.
Can a 747 fly on two engines?
A 747 can fly on just 2 engines. A 757 can fly on 1. A 747 cannot takeoff with just two engines because the time it would take to pick up enough speed would have it half way there, but once its in the air, they’ll keep it moving. 2.
What is the thrust to weight ratio of an aircraft?
For aircraft, the quoted thrust-to-weight ratio is often the maximum static thrust at sea-level divided by the maximum takeoff weight. In cruising flight, the thrust-to-weight ratio of an aircraft is the inverse of the lift-to-drag ratio because thrust is the opposite of drag, and weight is the opposite of lift.
Can a plane take off with less thrust than its weight?
A plane can take off even if the thrust is less than its weight: if the lift to drag ratio is greater than 1, the thrust to weight ratio can be less than 1, i.e. less thrust is needed to lift the plane off the ground than the weight of the plane. For propeller-driven aircraft, the thrust-to-weight ratio can be calculated as follows:
Which is better thrust to weight or power to weight?
This adjustment is essential to permit the comparison between different requirements. Really the term “thrust-to-weight” is mainly associated with jet aircrafts. The equivalent term for propeller aircrafts is the “power-to-weight” ratio.
What is the thrust to weight ratio of Atlas V?
The Russian-made RD-180 rocket engine (which powers Lockheed Martin’s Atlas V) produces 3,820 kN of sea-level thrust and has a dry mass of 5,307 kg. Using the Earth surface gravitational field strength of 9.807 m/s², the sea-level thrust-to-weight ratio is computed as follows: (1 kN = 1000 N = 1000 kg⋅m/s²)