Consider a helicopter with the following properties: 1. Using Cp Weight Main Rotor Tipspeed Main Rotor Radius Number of Blades Engine Power Transmission Loss F/A Flight Path Angle CdO Empirical Correction Factor Divergence Mach Number KCT2 σcdo 2√12+22 8 16000 lbs 725 ft/s 27 ft 4 3000 HP 10% 0.015 5 degrees 0.008 1.15 0.96 + ººº (1 + 4.65µ²) +¾½µ³ ²+λCT, calculate the max speed in knots for steady level flight from sea level to 25000 feet while keeping the blade tip speed under the divergence Mach number. Use the ratio of density at altitude to sea level density as a knockdown factor to the available engine power. 2. Using the above equation for the same altitude range and constraints, find the new max speed while ensuring that the helicopter can climb at the service ceiling rate. a. Solve using a climb velocity of 100 ft/min in the power equation b. Solve using the leftover power divided by weight to get 100 ft/min 3. Compare the two different max speeds from step 2.

Consider a helicopter with the following properties: 1. Using Cp Weight Main Rotor Tipspeed Main Rotor Radius Number of Blades Engine Power Transmission Loss F/A Flight Path Angle CdO Empirical Correction Factor Divergence Mach Number KCT2 σcdo 2√12+22 8 16000 lbs 725 ft/s 27 ft 4 3000 HP 10% 0.015 5 degrees 0.008 1.15 0.96 + ººº (1 + 4.65µ²) +¾½µ³ ²+λCT, calculate the max speed in knots for steady level flight from sea level to 25000 feet while keeping the blade tip speed under the divergence Mach number. Use the ratio of density at altitude to sea level density as a knockdown factor to the available engine power. 2. Using the above equation for the same altitude range and constraints, find the new max speed while ensuring that the helicopter can climb at the service ceiling rate. a. Solve using a climb velocity of 100 ft/min in the power equation b. Solve using the leftover power divided by weight to get 100 ft/min 3. Compare the two different max speeds from step 2.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A Francis radial-flow hydroturbine has the following dimensions, where location 2 is the inlet and location 1 is the outlet: r2 = 2.00 m, r1 = 1.30 m, b2 = 0.85 m, and b1 = 2.10 m. The runner blade angles are ?2 = 71.4° and ?1 = 15.3° at the turbine inlet and outlet, respectively. The runner rotates at n. = 160 rpm. The volume flow rate at design conditions is 80.0 m3/s. Irreversible losses are neglected in this preliminary analysis. Calculate the angle ?2 through which the wicket gates should turn the flow, where ?2 is measured from the radial direction at the runner inlet. Calculate the swirl angle ?1, where ?1 is measured from the radial direction at the runner outlet. Does this turbine have forward or reverse swirl? Predict the power output (MW) and required net head (m).
Show the Relationship between these performance parameters and engines speed of Internal Combustion Engines engines 1. Brake power (BP) 2. Friction power (FP) 3. Mechanical efficiency 4. Thermal efficiencies (Brake and Indictaed) 5. Specific fuel consumption 6. Brake mean effective pressure
Two centrifugal pumps are connected in series in a given pumping system. Plot total head Δh against capacity Q pump and system curves and determine the operating points for (a) only pump 1 running (b) only pump 2 running (c) both pumps running on the basis of the following data: operating data for pump 1 Δh1 m, 50.0 49.5 48.5 48.0 46.5 44.0 42.0 39.5 36.0 32.5 28.5 Q m3 /h, 0 25 50 75 100 125 150 175 200 225 250 operating data for pump 2 Δh2 m, 40.0 39.5 39.0 38.0 37.0 36.0 34.0 32.0 30.5 28.0 25.5 Q m3 /h, 0 25 50 75 100 125 150 175 200 225 250 data for system Δhs m, 35.0 37.0 40.0 43.5 46.5 50.5 54.5 59.5 66.0 72.5 80.0 Q m3 /h, 0 25 50 75 100 125 150 175 200 225 250
A Kaplan turbine has the following specifications: H =25 ft., N=400 rpm; power = 650 hp. If the efficiency of the unit is 90%, estimate (a) the flow rate, (b) approxi-mate diameter of the runner, (c) turbine setting to avoid cavitation if the location is at sea level, and (d) turbine setting to avoid cavitation if the location of the unitis at an elevation of 5000 ft. The local temperature is 60°F.Ans: (a) Q=254 cfs; (c) Hs=5.8 ft.; (d) 0.12 ft.
A 0.30 m X 0.40 m branch duct leaves a 0.30 m X 0.60 m main duct at an angle of 60°. The air temperature is 20°C. The dimensions of the main duct remain constant following branch. The flow rate upstream is 2.7 m3/s. Find the pressure downstream in the main duct if at 20°C, the mass per unit volume is 1.2041 kg/m3. Group of answer choices 436 Pa 634 Pa 643 Pa 346 Paplease show full soluton for review and analysis
Pressure measurement will be carried out with Pitot tube in air flow with average speed 400 m/s, static pressure 0.8 bar and static temperature 15ºC. How many kPa is the total pressure measured by the Pitot tube, since R=287 J/kgK and k=1.4? a. 163.67 b. 182.57 c. 159.75 d. 187.05 e. 178.42
Look up the word affinity in a dictionary. Why do you suppose some engineers refer to the turbomachinery scaling laws as affinity laws?
What is the pressure ratio of the High-Pressure turbine operating at cruise? Given data: Mach number = 0.8 Altitude = 40000 ft High pressure Compressor ratio = 18 booster pressure ratio = 1.66 Fan Pressure Ratio = 1.5 Cp = 1244J/kgK polytropic efficiency =0.9 ? = 1.3
The dimensions of a Francis radial-flow hydroturbine are r2 = 2.00 m, r1 = 1.30 m, b2 = 0.85 m, and b1 = 2.10 m, where location 2 is the inlet and location 1 is the outlet. At the turbine inlet and outflow, the runner blade angles are β2 = 71.4° and β1 = 15.3°, respectively. The runner rotates at a rate of ń = 160 rpm. At design conditions, the volume flow rate is 80.0 m3 /s
A certain centrifugal pump was tested and its performance curves can be approximated as follows: H = 340 - 1.2(Q2), in feet BP = (0.0521Q3) + (1.25Q2) + (11.042Q) + 134.5, in horsepower where Q is in ft3/s. If two of this pump is connected in series to deliver water to a system whose head requirement is 615 ft, what will be the operating discharge rate in ft3/s of either pumps?
A liquid with a specific gravity of 4.7 and a viscosity of 1.3 cp flows through a smooth pipe of unknown diameter, resulting in a pressure drop of 0.183 lbf/in² for 1.73 mi. What is the pipe diameter in inches if the mass flowrate is 5,900 lb/hr?A. 3.64 inB. 0.44 inC. 5.74 inD. 0.005 in
A 1:10 model of a Francis turbine developed 0.5 kW under a head of 2.5 m at 480 rpm. The physical data are r1=1.5m, r2 = 0.4m, α1=15°, β2=135°. Find the speed of the prototype at a head of 20m.