subject
Engineering, 20.10.2020 01:01 gymer630

You are asked to help design a streamlined dirigible with a length of 600 m and a diameter of 100 m to cruise at 15 m/sec for excursions for retired professors. Your task is to estimate the power required for each of four engines assuming 100% efficient propellers. You are allowed to make the crude assumption for calculating the drag that the surface can be represented as one side of a flat plate formed by unwrapping a hollow cylinder with the same length a diameter. You estimate is about: a. 20 horsepower
b. 200 horsepower
c. 2000 horsepower
d. 2 horsepower

ansver
Answers: 2

Another question on Engineering

question
Engineering, 04.07.2019 18:10
The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false
Answers: 1
question
Engineering, 04.07.2019 18:10
Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.
Answers: 3
question
Engineering, 04.07.2019 18:10
Ifa component is made of two or more materials with different modulus of elasticity (e), it is called a composite member and we calculate the factor·n". mention the formula for calculating n". also, ifn> 1, explain what will happen to the 1. transformed.gi) ifn 1, what will happen to the material when transformed material when
Answers: 1
question
Engineering, 04.07.2019 18:20
Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]
Answers: 1
You know the right answer?
You are asked to help design a streamlined dirigible with a length of 600 m and a diameter of 100 m...
Questions
question
Mathematics, 30.03.2020 19:06
question
Biology, 30.03.2020 19:06
question
Mathematics, 30.03.2020 19:06
question
Mathematics, 30.03.2020 19:06
Questions on the website: 13722367