AER324 Aircraft Dynamics and Control Practical Flight Course Assignment Assignment Weighting: 40% Assignment Released: 5 February 2021 Due Date: 23.55 midnight, 25 April 2021, at the end of week 8 Submission You should submit your course work (CW) assignment in electronic form only on Blackboard (MOLE), the due date with an appropriate cover sheet created by you. Please name the file with your report for the submission on Blackboard to be the same as your ID number, e.g. CW_1101133888. Penalties for Late Submission: Late submissions will incur the usual penalties of a 5% reduction in the mark for every working day (or part thereof) that the assignment is late and a mark of zero for submission more than 5 days late. Feedback Date: approximately three weeks after the submission. Assignment Following the flight course you should produce a brief write up (no more than 2000 words upper limit) of approximately detailing the following: Why is it important to assess the longitudinal static stability of an aircraft and what conditions must the aircraft satisfy to be longitudinally statically stable; Using data and appropriate graphs, comment on the longitudinal static stability of the aircraft; Why is it important to assess the longitudinal manoeuvre stability of an aircraft and Comment on how useful and important you believe flight testing is in practise for the design of aircraft compared to other approaches (e.g. simulation and wind tunnel testing). You should look at the mark sheet for hints on what to include. It is recommended that you include data (and graphs) to justify your comments. You should also use data from other groups’ and show results from 3 data sets at least. Your report needs to start with a cover sheet, where you indicate your ID number. You may structure the write up in any way you think is most appropriate but it should include a brief introduction (that introduces the report and outlines its content) and concluding remarks (which will summarise the key points of the report and also cover your comments on the usefulness of flight testing). Include diagrams where it is appropriate. A suggested structure for the report is: 1. Introduction 2. Longitudinal static stability – stick fixed and stick free cases 3. Demonstrate understanding of manoeuvre stability 4. Conclusions (how useful flight testing is and an overall summary) Note that appendices should not be included as they will not be marked. All relevant information should be in the main body of the report (appendices should only be used in general for additional information that is not necessary to understand the main report but maybe of additional interest). Use the Handbook for the Practical Flight Test for completing your assignment. Marking Criteria Please see attached marking criteria – this is the mark sheet that will be used to assess the assignment. The mark sheet indicates the marks available for each part of the assignment and also indicates some of the factors that will be used in assessing the assignment. It is strongly recommended that you study this mark sheet before completing the assignment. This assignment will contribute up to 40% of the overall mark for AER324. An excellent report shows: a concise summary of the main theoretical background knowledge and a related discussion of the observed during the test understanding and critical analysis of the results, e.g. explains the locations of all neutral points (calculated from the given data). Many of the questions to answer are summarised in the booklet for the flight test course. ability of independent work and demonstration of a broad view on flight testing and aircraft stability. structure, a cover page, a content page, final conclusions maximum report limit: 2000 words Note that the cover page, content page, image captions and references are not counted towards the maximum word number. Assessment The attached mark sheet provides a guide to what the assessment criteria are. Unfair Means The assignment should be completed individually. You should not discuss the assignment with other students and should not work together in completing the assignment. The assignment must be wholly your own work. References must be provided to any other work that is used as part of this assignment. Any suspicions of the use of unfair means will be investigated and may lead to penalties. See https://www.sheffield.ac.uk/apse/digital/turnitin/unfairmeans for more information. Prof. Lyudmila Mihaylova Email: l.s.mihaylova@sheffield.ac.uk AER324 – Practical Flight Course Assignment Marking Form Student …………………………………………………………………………… This assignment contributes up to 40% of the overall mark for AER324. Marking Criterion/Comments Marks Compare Cessna 172 with Jetstream 31 and discuss how stability (longitudinal, directional and lateral) is achieved by their design. Discuss also the control systems of the two airplanes. /20 Demonstrate what longitudinal static stability is, show appreciation and understanding of its importance, factors that affect it. Give examples of static stability, how does this affect aircraft. Give a brief theoretical background knowledge and explain the conditions with examples. /10 Present results with at least with three data sets that are given to you for Jetstream 31. Discuss these results for longitudinal static stability of the aircraft. Show logical, well- reasoned discussion, with relevant evidence to support your conclusions (e.g. with the collected data and graphs). Show the neutral points for the stick-fixed and stick-free cases of longitudinal static stability. /30 Define shortly what manoeuvre stability is, why it is important. How do we assess manoeuvre Give a brief theoretical background knowledge. Give examples of aircrafts with manoeuvre stability/ instability. /10 Describe what flight testing is, how useful e.g. how logical and reasoned conclusions are, are these based on suitable evidence. /15 Quality of writing and presentation style: clarity, conciseness, structure, logical flow, figures and tables, use of references. /15 Total /100 Additional comments: Prof. Lyudmila Mihaylova Marker……………………………………………………Date………………………
