1998/99 Rules and Vehicle Design = Specification

From: Subject: 1998/99 Rules and Vehicle Design Specification Date: Sat, 6 May 2006 12:03:11 -0500 MIME-Version: 1.0 Content-Type: multipart/related; type="text/html"; boundary="----=_NextPart_000_000E_01C67105.0C258B00" X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 This is a multi-part message in MIME format. ------=_NextPart_000_000E_01C67105.0C258B00 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Location: http://www.ae.uiuc.edu/aiaadbf/99rules.html 1998/99 Rules and Vehicle Design = Specification

1999/00 Rules and Vehicle Design Specification

Judging:
For the 1999/00 contest year = aircraft=20 will be designed to complete multiple mission sorties within a timed = flight=20 period.

Each team must also submit a written Design Report, which is divided = into two=20 phases as noted in the documentation requirements section. A maximum of = 100=20 points will be awarded for the team design report. (One score will be = given=20 accounting for both sections.) Scores for the written reports will be = announced=20 at the beginning of the fly-off.

The overall team score is a combination of the paper and flight = scores. The=20 team with the highest overall team score will be declared the winner. =

Contest Site:
Host for the = competition will be=20 Cessna Aircraft Company. The fly-off will be held in Wichita Kansas. It is highly recommended that = teams=20 consider Wichita weather (wind) conditions during the aircraft design = phase.=20

Team Requirements:
All team members = (except for=20 a pre-approved designated pilot) must be full time students at an = accredited=20 University or College and student members of the AIAA. The team must be = composed=20 of both under classmen and upper classmen, with at least 1/3 of the = members=20 being under classmen (Freshman, Sophomores or Juniors). The pilot must = be an AMA=20 (Academy of Model Aeronautics) member. Teams may use a non-university = member for=20 the pilot if desired. Such a designated pilot must be from the team's = local=20 area, and pre-approved by the contest officials. We will also provide = qualified=20 pilots on the contest day for any teams who are unable to have their = pilot=20 attend.

Technical Assistance:
A non-exclusive = list of=20 some available suppliers for materials, R/C systems, electric motors and = NiCad=20 batteries is included in this package.

Past Reports:
A compendium of the = entry=20 technical reports from prior-year competitions is published by ONR = through the=20 NTIS. Individual entry reports are also available by request from the = AIAA. All=20 reports submitted become the property of AIAA, ONR, and Cessna.=20

Preferred access to the prior-year reports is through NTIS, = However,=20 individual reports may also be requested from AIAA (AIAA policy is to = make all=20 student competition reports available). Teams outside the US may not = have access=20 to the NTIS reports, so may need to contact AIAA for = copies.

1996/97=20 Report:
2031840 NTIS Accession Number: AD-A329 477/4/XAB
Support = of AIAA=20 Student Aircraft Design/Fly Competition
(Final rept. 1 Apr-31 Dec 97) =

Sponsorship:
Teams may solicit and = accept=20 sponsorship in the form of funds or materials and components from = commercial=20 organizations. All design, analysis and fabrication of the contest entry = is the=20 sole responsibility of the team members.

Schedule:
A completed entry form = (electronic)=20 is due to the contest administrator on or before 31 October 1999. = Written=20 reports for the PROPOSAL PHASE (5 copies), are due to the = chief of=20 scoring by COB 13 March 2000. Written reports for the = ADDENDUM=20 PHASE (5 copies), are due to the chief of scoring by COB 10 = April=20 2000. Scores for the written reports will be announced at the = beginning of=20 the fly-off. The contest is scheduled for 22-23 April 2000.

Late submissions will not be judged. Teams who do not submit the = required=20 written reports will not be allowed to fly.

Communications:
The contest = administration will=20 maintain a World Wide Web site containing the latest information = regarding the=20 contest schedules, rules, and participating teams. The contest web site = will=20 also contain a list of potential suppliers for materials and equipment = available=20 to build an entry. The contest web site is located at:

http://www.aae.uiuc.edu/aiaadbf

All teams are required to provide a single point-of-contact e-mail = address=20 with their contest application.

Questions regarding the contest, schedules, or rules interpretation = may be=20 sent to the contest administrator by e-mail at:

gregory.s.page@nrl.navy.mil

The contest administrator will provide copies of all questions = received and=20 their answers to all teams of record.

Written reports (only) should be sent to the chief of scoring at: =

Dr. David W. Levy
Cessna Aircraft Co
5701 = E.=20 Pawnee, MS 178 P
Wichita, KS 67218
email:=20 dlevy@CESSNA.TEXTRON.COM
PHONE: (316) 831-2520
FAX: (316) = 831-2828=20

Aircraft Requirements - General

The aircraft may be of any configuration except rotary wing or=20 lighter-than-air.=20
Maximum wing span is 7 feet.=20
Must be propeller driven and electric powered with an unmodified, = over the=20 counter model electric motor. May use multiple motors = and/or=20 propellers. May be direct drive or with gear or belt reduction. For = safety,=20 each aircraft will use a commercially produced propeller. Teams may = modify the=20 propeller diameter by clipping the tip.=20
Must use over the counter NiCad batteries. For safety, battery = packs must=20 have shrink-wrap or other protection over all electrical contact = points. The=20 individual cells must be commercially available, and the manufacturers = label=20 must be readable (i.e. clear shrink wrap preferred).=20
Maximum battery pack weight is 5.0 lb. Battery pack must power = propulsion=20 and payload systems. Radio Rx and servos (only) may be on a separate = battery=20 pack. Batteries may not be changed between sorties during a flight = period.=20
Aircraft and pilot must be AMA legal. This means that the aircraft = TOGW=20 (take-off gross weight with payload) must be less than 55 lb., = and the=20 pilot must be a member of the AMA. Since this is an AMA sanctioned = event, the=20 team must submit proof that the aircraft has been flown prior to the = contest=20 date (in flight photo or video).

The pilot need not be a = student at the=20 represented university. Application for approval of a non-student = pilot must=20 be presented to the contest administrator for approval at least one = month=20 prior to the written report, PROPOSAL PHASE submission. =

Aircraft Requirements - Safety

All vehicles will undergo a safety inspection by a designated contest = safety=20 inspector prior to being allowed to make any competition or = non-competition=20 (i.e. practice) flight. All decisions of the safety inspector are final. = Safety=20 inspections will include the following as a minimum.

Physical inspection of vehicle to insure structural integrity.=20
- Verify all components adequately secured to vehicle. Verify all=20 fasteners tight and have either safety wire, lock-tite (fluid) or = nylock=20 nuts.=20
- Verify propeller structural and attachment integrity.=20
- Visual inspection of all electronic wiring to assure adequate = wire=20 gauges and connectors in use. Teams must notify inspector of = expected=20 maximum current draw for the propulsion system.=20
- Radio range check, motor off and motor on.=20
- Verify all controls move in the proper sense.=20
- Check general integrity of the payload system.
Structural verification. All aircraft will be lifted with one lift = point=20 at each wing tip to verify adequate wing strength (this is equivalent = to a=20 2.5g load case) and to check for vehicle cg location. Teams must mark = the=20 expected empty and with payload cg location on the exterior of the = aircraft=20 fuselage. Special provisions will be made at the time of the contest = for=20 aircraft whose cg does not fall within the wing tip chord. This test = will be=20 made with the aircraft filled to its maximum payload capacity=20 (Teams must inform the inspector and judges of their maximum = design=20 capacity and must make all flights within that capacity).=20
Radio fail-safe check. All aircraft radios must have a fail-safe = mode that=20 is automatically selected during loss of transmit signal. The = fail-safe will=20 be demonstrated on the ground by switching off the transmit radio. = During fail=20 safe the aircraft receiver must select:=20
- Throttle closed=20
- Full up elevator=20
- Full right rudder=20
- Full left aileron=20
- Full Flaps down (if so equipped)

The radio Fail Safe provisions will be strictly = enforced.

All aircraft must have a mechanical motor arming system separate = from the=20 onboard radio Rx switch. This may be a mechanical switch rated for the = maximum=20 current draw accessible from outside the aircraft, or can be a = removable link=20 such as an automotive "blade" style fuse. The aircraft Rx should = always be=20 powered on and the Tx throttle verified to be "closed" before = activating the=20 motor arming switch.

Mission Profile:

For the 1999/00 DBF contest, teams will = alternate between=20 two different sorties (flights) - a short-field cargo sortie and a = cruise/ferry=20 sortie. Teams may fly as many sorties as desired within the flight = period, but=20 must alternate between the sorties. Either sortie may be flown first. = Each=20 sortie will be assigned a score based on the table below. Note that only = the=20 short-field cargo sortie yields scoring points. The Single Flight=20 Score is the sum of the score(s) for the individual sorties = flown during=20 a single flight period. The best three Single Flight = Scores (may=20 be reduced to two if restricted by weather) for each team will be summed = for the=20 team's Total Flight Score.

Each team's overall score will be computed from their Written = Report=20 Score, Total Flight Score, and the Rated = Aircraft=20 Cost using the formula:

SCORE =3D Written Report Score * Total Flight Score =
Rated=20 Aircraft Cost=20

Rated Aircraft Cost must be documented and = included in=20 the Addendum Report provided prior to the competition. (If not provided, = a value=20 of 100 will be used.)

Sortie Matrix

No. Score Description

1 10*n Short Field Cargo Sortie=20

Carry 'n'-liters of water one lap of course. Water is to be = carried=20 in polyethylene 1 liter round bottles (full bottles only). =

Short field take-off (100 ft Max)

Minimum aircraft capacity is 2 liters (may fly less than = minimum=20 capacity). Maximum aircraft capacity is 8 liters (may NOT fly = more than=20 maximum capacity). Aircraft structural test will be conducted at = individual aircraft's maximum physical capacity.=20
All payload must be carried internally in a fully faired, = fully=20 closed structure.=20
Aircraft must complete a 360^o turn in the = direction=20 opposite of the base and final turns on each downwind leg.=20

2 No Score Cruise/Ferry Sortie=20

Aircraft must complete 2 full laps of the course with no = payload.=20 This non-scoring return task must be completed before attempting = another=20 scoring sortie of task #1.

Short field take-off (100 ft Max)=20
360 degree turn on downwind is not required for this task.=20

Aircraft Cost Model

Rated Aircraft Cost, $ (Thousands) =3D (A*MEW + B*REP + = C*MFHR)/1000

Coef. Description Value

A Manufacturers Empty Weight Multiplier $100 / lb.

B Rated Engine Power Multiplier $1 / watt

C Manufacturing Cost Multiplier $20 / hour

MEW Manufacturers Empty Weight Actual airframe weight, lb., without payload or = batteries=20

REP Rated Engine Power # engines * 50A * 1.2 V/cell * # cells

MFHR Manufacturing Man Hours Prescribed assembly hours by WBS (Work Breakdown = Structure).=20
MFHR =3D S WBS hours

WBS 1.0 Wing(s):
5 hr./wing.
+ 4 hr/sq. ft. Projected = Area

WBS 2.0 Fuselage and/or pods
5 hr/body.
+ 4 hr/ft of = length

WBS 3.0 Empenage
5 hr.(basic)
+ 5 hr./Vertical = Surface
+ 10=20 hr./Horizontal Surface

WBS 4.0 Flight Systems
5 hr.(basic)
+ 1 hr./servo

WBS 5.0 Propulsion Systems
5 hr./engine
+ 5 hr./propeller = or fan=20

Since the contest requires multiple sorties during each flight = period; ground=20 handling, take-off and landing are paramount design considerations.

Teams may fly multiple sorties within a 10=20 minute flight period. For each new sortie the team must = switch=20 to the opposite task. The time to unload and reload the payload for = the next=20 sortie is part of the flight period.=20
Aircraft will be brought to the flight line to begin the flight = period=20 with the payload for the first sortie (mission task) already loaded. = Teams=20 will be given a maximum of 2 minutes to place their aircraft on the = starting=20 line and prepare for competition before the judges start the timed = flight=20 period.=20
The aircraft payload must be emptied or reloaded before each = additional=20 sortie. Aircraft propulsion system(s) must be disarmed or "safed" = during all=20 payload changes.=20
Sorties may be repeated as many times as possible provided the = aircraft=20 has passed the downwind turn pylon before the time limit = for the=20 flight period ends.=20
Maximum flight support crew is: pilot, observer and 3 ground crew. = Only=20 the designated ground crew may conduct the unloading/reloading. Pilot = and=20 observer may be members of the ground crew, provided total ground crew = size=20 remains 3 people.=20
The upwind turn will be made after passing the upwind pylon. The = downwind=20 turn will be made after passing the downwind pylon. Upwind and = downwind pylons=20 will be 500 feet from the starting line. Aircraft must be "straight = and level"=20 when passing the pylon before initiating the turn.=20
Aircraft must land on the paved portion of the runway. Aircraft = may=20 "run-off" the runway during roll-out.=20
After landing, aircraft will taxi back to the starting line to = unload=20 their payload, and reload for the next sortie. Wing-Walkers are = allowed to=20 accompany the plane during the taxi, but must wait at the starting = line until=20 the aircraft comes to a complete stop before going to assist the = aircraft.=20
Aircraft that run off the runway during landing may be carried = back to the=20 runway by the ground crew to taxi back to the starting line. Aircraft = that=20 leave the runway will be returned to the runway at the nearest = possible=20 location.=20
Aircraft unable to taxi back to the starting line due to landing = damage=20 may be carried by the designated ground crew. Ground crew members will = not be=20 allowed to leave the starting line to retrieve the aircraft until the = aircraft=20 has stopped.=20
Aircraft experiencing minor landing damage may be repaired and fly = additional sorties within the flight period. Repairs must be made on = the=20 starting line, and may not begin until the payload has been unloaded. = Repairs=20 must be completed before the payload is reloaded for the next sortie. = All team=20 members may assist in repairs, only ground crew members may reload the = aircraft.=20
Aircraft will be considered to have only minor damage if = they can=20 be repaired and presented as flight worthy within 30 minutes of the = end of=20 that flight period. Aircraft with only minor damage will be = credited=20 with their full Single Flight Score.=20
Aircraft which can be repaired during the competition, but not = within 30=20 minutes of the flight period, will NOT be credited with a score for = the last=20 sortie flown, but will receive full credit for any prior sorties.=20
Flight altitude must be sufficient for safe terrain clearance and = low=20 enough to maintain good visual contact with the aircraft. Decisions on = safe=20 flight altitude will be at the discretion of the flight line judges = and all=20 rulings will be final.

Additional information is included in the FAQ (Frequently Asked = Questions).=20

Design Report:

Each team will submit a judged design report as outlined below. The = design=20 report will be submitted in two sections. Submission dates are contained = in the=20 schedule section of this document. Reports must be bound in some manor = (simple=20 spiral bindings are sufficient and preferred, 3-ring binders are = discouraged).=20 Both the Proposal and Addendum reports must contain the same cover, = title page,=20 and table of contents. All information used for scoring must be in the = outlined=20 sections. Sections exceeding the page limits will be scored as = "zero".=20 Appendices may be included if desired, but WILL NOT BE INCLUDED = DURING=20 JUDGING.

Design Report-PROPOSAL PHASE

Executive Summary: (Maximum 3 pages, 5 points): Provide a summary = of the=20 development of your design. This should be a narrative description=20 highlighting the major areas in the development process for your final = configuration and a broad description of the range of design = alternatives=20 investigated. Include an overview of the design tools used for each = phase of=20 the design development: conceptual design, preliminary design, and = detailed=20 design.=20
Management Summary (Maximum 2 page, 5 points): Describe the = architecture=20 of the design team. Provide a list of design personnel and assignment = areas.=20 Document the management structures used for personnel assignments, = schedule=20 control, and configuration control. Include a (single) milestone chart = showing=20 planned and actual timing of major elements of the design process, = including=20 as a minimum the conceptual design stage, preliminary design stage, = detailed=20 design stage, and report preparation periods.=20
Conceptual Design (Configuration Selection, Maximum 10 pages, 20 = points):=20 Document the alternative concepts investigated during the conceptual = design=20 stage. Detail the design parameters investigated, and why each was = felt to be=20 important. Describe the figures of merit (FOM's) used to screen = competing=20 concepts, and the mission feature each FOM was selected to support. = Include=20 the value for Rated Aircraft Cost assigned to each = concept=20 during the FOM screening process. Describe the analytic methods = used=20 during the conceptual design stage, the expected accuracy and why each = was=20 selected for this design phase. Numerical data need not be extensive = at this=20 stage, but should include as a minimum a final ranking chart giving = the=20 quantitative value of each design for each FOM, the FOM importance = factors or=20 ranking, and an explanation of the features that produced the final=20 configuration selection.
Preliminary Design (Performance Estimation and Vehicle Sizing, = Maximum 5=20 pages, 20 points): Document the design parameter and sizing = trades=20 investigated during the preliminary design stage. Detail the design = parameters=20 investigated, and why each was felt to be important. Describe the = FOM's used=20 and the mission or design feature each FOM supports. Describe the = analytic=20 methods used during the preliminary design stage, the expected = accuracy and=20 why each was selected for this design phase. Numerical data will be = more=20 extensive at this stage, and should include as a minimum configuration = and=20 sizing parameter values sufficient to justify the selection of the = final value=20 chosen for each of the major design and sizing parameters. Include a = summary=20 of the key features that distinguish the final configuration.=20
Detail Design (Final Design, Drawings and Performance Predictions, = Maximum=20 10 pages Plus Drawing Package, 20 points): Final performance data = should be=20 provided for the design, including take off performance, handling = qualities=20 and g load capability, range and endurance, and payload fraction. = Component=20 selection and systems architecture should be included in this section. = The=20 Drawing Package must contain as a minimum a 3-view = drawing of=20 the design in sufficient detail to indicate aircraft size and = configuration,=20 primary structure component size and location, and location of = propulsion and=20 flight control system components.=20
Manufacturing Plan (Materials Selection and Fabrication Processes, = Maximum=20 5 pages, 10 points): Document the process selected for = manufacture of=20 major components and assemblies of the final design. Detail the = manufacturing=20 processes investigated, and describe the FOM's used (including but not = limited=20 to: availability, required skill levels and cost) to screen competing=20 concepts. Describe the analytic methods (cost, skill matrix, = scheduling time=20 lines) used to select the final set of manufacturing processes. = Include a=20 manufacturing milestone chart showing scheduled event timings.

Design Report-ADDENDUM PHASE

Lessons Learned (Maximum 5 pages, 10 points): Document any areas = where the=20 final contest aircraft differs from the PROPOSAL design. Also identify = areas=20 for improvement in the next design and manufacturing process = implementation.=20
Aircraft Cost (Maximum 5 pages plus table, 10 points) Document = your final=20 competition aircraft's Rated Aircraft Cost using the = contest=20 supplied cost model. Provide a table indicating values for each = airframe=20 dependent parameter in the cost model. Provide a table listing = manufacturing=20 hours broken down by the supplied WBS structure.

Notes:

=B7 Page counts do not include figures or=20 tables. Figures and tables should be placed at the end of the text = for a=20 given section.

[Top] = [AIAA Student = Design/Build/Fly=20 Competition homepage][AIAA = Homepage]=20
Webmaster m-selig@uiuc.edu=20

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Coef.	Description	Value
A	Manufacturers Empty Weight Multiplier	$100 / lb.
B	Rated Engine Power Multiplier	$1 / watt
C	Manufacturing Cost Multiplier	$20 / hour
MEW	Manufacturers Empty Weight	Actual airframe weight, lb., without payload or = batteries=20
REP	Rated Engine Power	# engines * 50A * 1.2 V/cell * # cells
MFHR	Manufacturing Man Hours	Prescribed assembly hours by WBS (Work Breakdown = Structure).=20 MFHR =3D S WBS hours WBS 1.0 Wing(s): 5 hr./wing. + 4 hr/sq. ft. Projected = Area WBS 2.0 Fuselage and/or pods 5 hr/body. + 4 hr/ft of = length WBS 3.0 Empenage 5 hr.(basic) + 5 hr./Vertical = Surface + 10=20 hr./Horizontal Surface WBS 4.0 Flight Systems 5 hr.(basic) + 1 hr./servo WBS 5.0 Propulsion Systems 5 hr./engine + 5 hr./propeller = or fan=20