Conference Session

Aerospace Division Technical Session 3

Collection

2014 ASEE Annual Conference & Exposition

Authors

Steve Gorrell, Brigham Young University; C. Greg Jensen, Brigham Young University; Brett Stone, Brigham Young University; Edward Red, Brigham Young University; Michael Richey, The Boeing Company; Fabian Zender, The Boeing Company; Michael Wright; David E. French, The Boeing Company; Shigeo Hayashibara, Embry-Riddle Aeronautical University, Prescott; Carl Johnson, Georgia Institute of Technology; John P. Sullivan, Purdue University, West Lafayette

Tagged Divisions

Aerospace

the conceptual design phase andabout 75% of the preliminary design phase. Teams had presented a Conceptual Design Reviewand Preliminary Design Review to the AerosPACE Advisory Board. The purpose of this sectionis to demonstrate what the multi-disciplinary, multi-university teams were able to accomplishafter one semester.Figure 4 shows Team 1’s interpretation of the UAV mission profile. Each team was asked torespond to the RFP and throughout the conceptual and preliminary design phases a clearunderstanding of the mission requirements was emphasized. Figure 4. Team 1 PDR RequirementsAn important outcome of the conceptual design phase is a constraint diagram to identify feasibledesign space based on takeoff, maximum

Conference Session

Aerospace Division Technical Session 1

Collection

2014 ASEE Annual Conference & Exposition

Authors

Scott L. Post, Bradley University

Tagged Divisions

Aerospace

/s) and must decelerate to a speed of 220 mph (100 m/s) at landing. During re-entry, thenose and leading edges of the wings experience temperatures as high as 3000 °F (1650 °C).1One of the major decisions to be made during the shuttle development was the design for thebooster rockets. Options included using liquid or solid-fueled boosters, and whether the boosterswould be expendable or reusable. NASA believed that solid rocket boosters would be lessexpensive to develop, even though they had had higher projected operational costs than liquidboosters. The shuttle was the first manned spacecraft to use solid rockets.1 There is somespeculation that the Air Force pressured NASA to use solid fuel boosters because they wanted todevelop the

Conference Session

Aerospace Division Technical Session 2

Collection

2014 ASEE Annual Conference & Exposition

Authors

Rajnish Sharma, University of Maryland, Eastern Shore; Abhijit Nagchaudhuri, University of Maryland, Eastern Shore

Tagged Divisions

Aerospace

was not achieved to finish the problem(s).Just to elaborate the project work and make it as a comprehensive study, the problems chosen Page 24.709.6from Ref. [2-4] are also added with many subparts, the project problems are developed asfollows:Problem 1[P7.10, REF. [1] MODERN CONTROL SYSTEMS 11th Edition, Dorf and Bishop](a) Figure 1 Sketch and Block Diagram of Feedback System(b) For the given characteristics of the aircraft in the medium-weight cruise condition. Plot theunit step responses of the system if the dominant roots

Conference Session

Aerospace Division Technical Session 1

Collection

2014 ASEE Annual Conference & Exposition

Authors

Devin Turner, Marquette University; Mark Nagurka, Marquette University

Tagged Divisions

Aerospace

where stiffness is most evident. Since the blades spin during normaloperation, they must be designed to minimize axial deflection due to the tension created by thecentrifugal loading and to minimize bending under their own weight due to static loading. Ahelicopter blade can be modeled as a fixed-free cantilever beam. Students can solve for thedeflection of the blade under tensile loading and distributed loading, as shown in Figure 5. Acase-study of the Sikorsky S-76 blade tip failure is also introduced. Students then discuss whatthey have learned about stiffness and deflection as it relates to design of components and how theS-76 design could be modified to minimize the risk of failure.3. Loads and Stress Stress and load path design is a

Conference Session

Aerospace Division Technical Session 3

Collection

2014 ASEE Annual Conference & Exposition

Authors

Terry Allen Michmerhuizen, College of Aviation, Western Michigan University

Tagged Divisions

Aerospace

sometimescustomers. Although a speech class is a required course in many four year universitycurriculums, the students need many more opportunities to prepare and present technicalinformation. Virtually every technical course provided by the maintenance training schoolshould incorporate at least one such student presentation in the class. Comprehension of the Effects of Human FactorsThis is the most important of the four “C”s and figure 3 reflects that nearly 80% of currentaviation related accidents are caused by Human Error. (4) CAUSAL FACTORS OF AVIATION ACCIDENTS 100% HUMAN 80

Conference Session

Aerospace Division Technical Session 2

Collection

2014 ASEE Annual Conference & Exposition

Authors

Nadir Yilmaz P.E., New Mexico Institute of Mining and Technology; Kyle Jeffrey Benalil, New Mexico Institute of Mining and Technology; Francisco Martín Vigil, New Mexico Institute of Mining and Technology

Tagged Divisions

Aerospace

advantages and disadvantages of each fuel. Table 1 shows the basic fuel properties ofbiodiesel used in this study in addition to jet-A and kerosene. Table 1. Properties of Jet-A, kerosene, and biodiesel [4,7,8] Fuels Jet-A Kerosene Biodiesel -1 Heating Value (MJ kg ) 42.8 43.5 40.5 0 -3 Density @20 C (kg m ) 807 780 855 0 Viscosity @ 40 C (mPa s) 0.88 1.4 4.57 0 Flash Point ( C) 60 39

Conference Session

Aerospace Division Technical Session 1

Collection

2014 ASEE Annual Conference & Exposition

Authors

Gene L. Harding, Purdue University

Tagged Divisions

Aerospace

introductory communications course. ATC and IFF systems are presented to explain theirpurpose and illustrate the substantial overlap in function (ATC is civilian, IFF is military).8The major emphasis in the systems material is on radar, which is used extensively in EWoperations and is perhaps least familiar to the students. The introduction includes radar’spurpose, antenna type(s), continuous wave (CW) vs. pulsed, and monostatic vs. bistatic.6,1,9 Thistopic was initially planned for two lectures, but was stretched to three lectures because thestudents struggled with the material. After the intro, pulsed and CW radars are treatedseparately, including range calculations for pulsed radar and Doppler shift for CW radars.Finally, radar ranging is covered