PROBLEM 9.1 A Boeing 747 has a wing span of 195.7 feet and a 6.95 aspect...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
PROBLEM 9.1 A Boeing 747 has a wing span of 195.7 feet and a 6.95 aspect ratio. It cruises at 500 mph at a weight of 550,000 pounds at 35,000 feet (density of 0.000737 slug/ft³). Assume that the Reynolds number can be approximated using: R₂ =9324 x V xe where V is the average speed in mph, e the average chord in feet. Assuming that the wing sweep and twist combine to give an essentially elliptical spanwise circulation distribution find: 1. From the given data, show that the span area is 5511 ft². 2. From the given data, show that the average elliptic chord is 35.85 ft. 3. From the given data, show that the Reynolds number is 1.67 × 10%. 4. Show that the cruise speed is 733 ft/s. 5. Show that the coefficient of lift is 0.50. 6. Show that I, 6.6 x 10¹ ft²/s. 7. Show that downwash velocity is -16.9 ft/s. 8. Show that the coefficient of induced drag is 116 counts. 9. Show that the induced Drag has a value of 12.7 x 10¹ lb. 10. Show that the induced angle of attack is approximately 1.32. 11. Show that the coefficient of profile drag is eq=0.0088. Assume you can use the value for a flat plate with a correction factor of 1.75. 12. Show that the coefficient of proof drag at cruise is c-0.0250. (See chart, next page) 13. Show the total coefficient of drag is 0.0455. (proof+ profile + induced). 0.8 0.6 0.4 0.2 0 -0.2 0.0 Cruise Drag Polar, M=.84, Alt=35 kft 88*** 0.02 -0.03- HTT 04 0.05 0.06 0.07 0.0 Nominal Cruise Point, 636kips CD PROBLEM 9.1 A Boeing 747 has a wing span of 195.7 feet and a 6.95 aspect ratio. It cruises at 500 mph at a weight of 550,000 pounds at 35,000 feet (density of 0.000737 slug/ft³). Assume that the Reynolds number can be approximated using: R₂ =9324 x V xe where V is the average speed in mph, e the average chord in feet. Assuming that the wing sweep and twist combine to give an essentially elliptical spanwise circulation distribution find: 1. From the given data, show that the span area is 5511 ft². 2. From the given data, show that the average elliptic chord is 35.85 ft. 3. From the given data, show that the Reynolds number is 1.67 × 10%. 4. Show that the cruise speed is 733 ft/s. 5. Show that the coefficient of lift is 0.50. 6. Show that I, 6.6 x 10¹ ft²/s. 7. Show that downwash velocity is -16.9 ft/s. 8. Show that the coefficient of induced drag is 116 counts. 9. Show that the induced Drag has a value of 12.7 x 10¹ lb. 10. Show that the induced angle of attack is approximately 1.32. 11. Show that the coefficient of profile drag is eq=0.0088. Assume you can use the value for a flat plate with a correction factor of 1.75. 12. Show that the coefficient of proof drag at cruise is c-0.0250. (See chart, next page) 13. Show the total coefficient of drag is 0.0455. (proof+ profile + induced). 0.8 0.6 0.4 0.2 0 -0.2 0.0 Cruise Drag Polar, M=.84, Alt=35 kft 88*** 0.02 -0.03- HTT 04 0.05 0.06 0.07 0.0 Nominal Cruise Point, 636kips CD
Expert Answer:
Answer rating: 100% (QA)
1 From the given data show that the span area is 5511 ft The span area can be calculated using the following formula Span Area Wing Span2 Aspect Ratio Given Wing Span 1957ft Aspect Ratio 695 Therefore ... View the full answer
Related Book For
Posted Date:
Students also viewed these mechanical engineering questions
-
1) Solve the equation below. Show all work following the methods discussed in class; if an equation includes fractions, clear the fractions in the first step. If the equation has a unique solution,...
-
ections. Show all of your work on this paper-no work means no credit. No calculators. () and B=(1) 621 021 1. Suppose A = value of a makes det (3ABC) = 27? 061 and that C is a 3 x 3 matrix with det C...
-
SHOW ALL WORK using these conversions 1 ft = 0.3058 m; 1 yd = 0.9044 m; 1 oz = 26.3495 g; 1 oz = 0.0825 lb 1000g = 1kg 1 lb = 0.443 kg; 1 lb =16 oz; 4 qt = 1 gal 1 gal = 3.775 L 1000mL = 1L 8.673 ft...
-
Using examples outline the main advantages and disadvantages of one of the following models of corporate governance: i) The principal/agent model ii) The stakeholder mode
-
Use the master glossary in the Codification to research the disclosure requirements for postretirement benefits other than pensions. Explain these requirements.
-
Assuming the cost of an associate leaving within 90 days is $3,000, what will be your facility's approximate cost of early turnover for this year? Year-to-Date Turnover Avg. Head- count Total < 90...
-
Using only the factor formulas given in Table 2.6, derive Equation 7.5 starting with Equation 7.3. TABLE 2.6 Summary of Discrete Compounding Interest Factors. To Find Given Factor Symbol Name P F...
-
On January 1, 2012, Crume Incorporated issued bonds with a face value of $100,000, a stated rate of interest of 9 percent, and a five-year term to maturity. Interest is payable in cash on December 31...
-
Joe is 25 and has a wage of $30,000. He is single with no dependents, and files as single. He rents and makes no contributions to charity. He contributed $800 to a Roth IRA in 2022. What is his Total...
-
Discuss the strong culture concept with respect to the culture of the Walt Disney Company. What are some examples that demonstrate it has a strong culture? What are its assets and liabilities?
-
On January 1, 2019 Paris Company acquired 25 percent of the common stock of Safir Corporation for $240,000, at underlying book value. For the same year, Safir reported net income of $70,000. It paid...
-
Which information concerning periodic statements and coupon books is true? A. If the servicer uses periodic statements, each statement must be sent reasonably promptly after the previous payment date...
-
An example illustrating how the equity method can result in manipulation of financial results is the case of Sunbeam Corporation. Sunbeam employed various manipulative tactics, including the use of...
-
Under the temporal method of translation, a foreign entity Multiple choice question. can have a net asset or a net liability balance sheet exposure. always has a net liability balance sheet exposure....
-
How do you navigate to the Journal report? Multiple choice question. From the Navigation Bar, click Reports. In the Search field, type Journal > click Journal and type the appropriate dates. From the...
-
Cost pools should be distributed to responsibility centers based on the cost Blank 1 Blank 1 cost , Incorrect Unavailable driver Blank 2 Blank 2 driver , Incorrect Unavailable. Correct Answer Blank...
-
Test the series for convergence or divergence. 8 Evaluate the following limit. Since lim b Identify b. (Assume the series starts at n = 1.) lim b no O and b 10 n + 1 LL b_ for all n, -Select---
-
Find the radius of convergence of? 1.2.3 1.3.5 (2n-1) r2n+1 -1
-
In Problems 1-3, sketch the indicated set. Describe the boundary of the set. Finally, state whether the set in open, closed, or neither. 1. {(x, y): 2 ( x ( 4, 1 ( y ( 5} 2. {(x, y): x2 + y2 < 5} 3....
-
Find the cosine of the angle between a and b and make a sketch. a. a = (1, -3), b = (-1, 2) b. a = (-1, -2), b = (6, 0) c. a = (2, -1), b = (-2, -4) d. a = (4, -7), b = (-8, 10)
-
Let f(x) = ax + b / cx - a. Show that f(f(x)) = x, provided a2 + bc 0 and x a/c.
-
Identify and explain the meaning of the term "strategy."
-
Describe and explain each of the major stages of the Strategic Management Planning process.
-
Identify and describe the major features of the Strategic Management model.
Study smarter with the SolutionInn App