The feasibility of a one-passenger VTOL (vertical takeoff and landing) craft is under review. The preliminary design calls for a small engine with a high power-to-weight ratio driving an air pump that draws in air through the 62° ducts with an inlet velocity v = 45 m/s at a static gage pressure of -1.246 kPa across the inlet areas totaling 0.1355 m². The air is exhausted vertically down with a velocity u = 408 m/s. For a 82-kg passenger, calculate the maximum net mass m of the machine for which it can take off and hover. (See Table D/1 for air density.)

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
icon
Related questions
Question
Table D/1 Physical Properties
Density (kg/m3) and specific weight (lb/ft³)
lb/ft3
0.07530
168
Air
Aluminum
Concrete (av.)
Copper
Earth (wet, av.)
(dry, av.)
Glass
Gold
Ice
Iron (cast)
Lead
Mercury
Oil (av.)
Steel
kg/m³
1.2062
2 690
2 400
8 910
1760
1280
2 590
19 300
900
7210
11 370
13 570
900
7 830
4 510
1 000
Titanium
Water (fresh)
(salt)
Wood (soft pine)
(hard oak)
* At 20°C (68°F) and atmospheric pressure
1030
480
800
150
556
110
80
162
1205
56
450
710
847
56
489
281
62.4
64
30
50
Transcribed Image Text:Table D/1 Physical Properties Density (kg/m3) and specific weight (lb/ft³) lb/ft3 0.07530 168 Air Aluminum Concrete (av.) Copper Earth (wet, av.) (dry, av.) Glass Gold Ice Iron (cast) Lead Mercury Oil (av.) Steel kg/m³ 1.2062 2 690 2 400 8 910 1760 1280 2 590 19 300 900 7210 11 370 13 570 900 7 830 4 510 1 000 Titanium Water (fresh) (salt) Wood (soft pine) (hard oak) * At 20°C (68°F) and atmospheric pressure 1030 480 800 150 556 110 80 162 1205 56 450 710 847 56 489 281 62.4 64 30 50
The feasibility of a one-passenger VTOL (vertical takeoff and landing) craft is under review. The preliminary design calls for a small
engine with a high power-to-weight ratio driving an air pump that draws in air through the 62° ducts with an inlet velocity v = 45 m/s at
a static gage pressure of -1.246 kPa across the inlet areas totaling 0.1355 m². The air is exhausted vertically down with a velocity u =
408 m/s. For a 82-kg passenger, calculate the maximum net mass m of the machine for which it can take off and hover. (See Table D/1
for air density.)
62
F
Answer: m =
Ti
TYP 6274
kg
Transcribed Image Text:The feasibility of a one-passenger VTOL (vertical takeoff and landing) craft is under review. The preliminary design calls for a small engine with a high power-to-weight ratio driving an air pump that draws in air through the 62° ducts with an inlet velocity v = 45 m/s at a static gage pressure of -1.246 kPa across the inlet areas totaling 0.1355 m². The air is exhausted vertically down with a velocity u = 408 m/s. For a 82-kg passenger, calculate the maximum net mass m of the machine for which it can take off and hover. (See Table D/1 for air density.) 62 F Answer: m = Ti TYP 6274 kg
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 1 images

Blurred answer
Knowledge Booster
Applied Fluid Mechanics
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Elements Of Electromagnetics
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY