Contents
What is the thrust-to-weight ratio of a Cessna 172?
A good estimate for a personal aircraft thrust requirement would be more like 25% of aircraft weight, and remember, the “ton” of Cessna includes fuel and pilot too! 213 kg thrust/909 kg weight = 23.3 % thrust to weight ratio.
How do you calculate thrust-to-weight ratio?
Calculation. The thrust-to-weight ratio is calculated by dividing the thrust (in SI units – in newtons) by the weight (in newtons) of the engine or vehicle. Note that the thrust can also be measured in pound-force (lbf), provided the weight is measured in pounds (lb).
What is the SI unit of thrust?
The force acting on an object perpendicular to the surface is called thrust. It is vector quantity and SI Unit of thrust is Newton. Thrust per unit Area is called Pressure.
What is Max thrust?
Maximum continuous thrust is the most thrust an engine can produce over a long period of time. An engine can produce more thrust than the maximum continuous level, but only for a few minutes. (This is called maximum takeoff thrust, and is physically the most thrust an engine can produce.)
How to calculate the thrust to weight ratio?
Note: Weight (in Newtons) is equal to mass times the gravitational acceleration rate of 9.8 m/s 2. Note: Remember that kN is simply N divided by 1000. Note: For Airplane Weight, if more than one value is given, find and use the average of the values.
How much does avgas weigh on a Cessna 172?
The arms, distances from some reference datum, will also come from your aircraft’s W&B info: fuel, front seats, rear seats, and baggage areas on a Cessna 172. Copy those into your table as well. Avgas (100LL) weighs 6 pounds per gallon, so the weight is 6 times the number of gallons.
What is the drag coefficient of a Cessna 172?
The key performance data which is relevant here is that a typical small, single engine aircraft, with a fixed undercarriage, will have a profile drag coefficient somewhere between 0.025 and 0.040. The Oswald spanwise efficiency factor will lie between 0.65 and 0.75.
What is the Oswald spanwise efficiency of a Cessna 172?
The Oswald spanwise efficiency factor will lie between 0.65 and 0.75. The book also provides a number of tables of representative data for various aircraft, for wing, horizontal and vertical tail parameters, and also weight data.