DOE Design Competition, IV
Windsurfer Board Construction
Final Score = (Mid-Term Report)10 + (Final Report)20 + (Windsurfer Board Construction, Performance and Engineering)50 + (Race)20
Board Construction, Performance and Engineering = (Board Weight) + (Volume ) + ( Hull Surface Smoothness ) + (Hull Puncture Resistance) + (Hull Water Resistance) + (Professional Board Maker's Evaluation)
One element of this report will be the cost accounting of the $2,000. start-up grant.
The final report will include a description of the final design. It will also include a description of the methods used to
Determine the weight, volume and weight percent of additives, coatings and fillers in the board. The final report will include a 5 minute video summarizing the highlights of the project.
Board Construction, Performance and Engineering:
Board Weight = Total finished board weight (board + anchor block + tail fin + center board)
(weightmax - weight)
Score = 10 __________________
(weightmax - weightmin)
Volume = (Determined from calculation. It must be an accurate estimate with any error being an Under-estimation of the actual volume)
Scoring based on minimizing weight to volume ratio of board
(weight/volume)max - (weight/volume)
Score = 10 _________________________________
(weight/volume)max - (weight/volume)min
Hull Surface Smoothness = TAPPI T538, Roughness of paper and paperboard (Sheffield Method)
(Sheffield)max - (Sheffield)
Score = 10 _____________________
(Sheffield)max - (Sheffield)min
Hull Surface Coefficient of Friction = ISO 15359, Paper and board - Determination of the static and kinetic coefficients of friction - Horizontal plane method
(COF)max - (COF)
Score = 10 ________________
(COF)max - (COF)min
Hull Puncture Resistance = TAPPI T803, Puncture test of container board. and
(Puncture Energy) - (Puncture Energy)min
Score = 10 _________________________________
(Puncture Energy)max - (Puncture Energy)min
Hull Water Resistance = TAPPI T558, Surface wettability and absorbency of sheeted materials using an automated contact angle tester.
(Contact Angle) - (Contact Angle)min
Score = 10 ________________________________
(Contact Angle)max - (Contact Angle)min
Professional Board Makers Evaluation:
Board aesthetics, novelty of design, incorporation of a non-skid surface, materials engineering and construction fabrication considerations, retractable and removable center board.
The race will be a linear course, perpendicular to the wind, around two buoys spaced 400 meters
Apart. The race will be conducted in a series of heats with the winner of each heat proceeding to the next
Pareto each team; lowest time = first place, longest time = last place
Boards will be raced in pairs with the winner continuing in the next heat(This protocol will be determined on the day of the race based upon lake and wind conditions)
Boards will be raced in a modified match race; the winners of match one and two will race in match three etc.
- The race will be conducted on the appointed day, rain or shine.
- The Race Committee will supply sails, masts, riggings, base plate, mast foot and mast extension.
Anticipated mast length 11 feet, sail dimensions ~ 7 feet by 11 feet.
A base plate, mast foot and mast extension will be provided to each team.
Commercial mast track boxes and/or tail fin boxes are not allowed.
The mastfoot and base plate being provided are manufactured by Chinook.
The base plate is a 2-bolt version that normally attaches to a sailboard
with an integrated mast track. What has been discussed for purposes of the
competition was to embed a length of wood (2X4 or 2X6) in the deck of the
sailboard and attach the plate using two lag bolts.Teams are encouraged to be innovative in
this design and construction element of the sail board.
- Faculty supervising the teams are strongly encouraged to incorporate the project into a design class or other special problems class where students will receive credit for the effort.
- Each team is encouraged to have an industrial mentor.
- Faculty advisors will verify team-derived metrics, e.g. board weight, volume, composition, by signing off on the appropriate pages in the final report.
- The board weight is the sum of the board + tail fin + center board.
- Synthetic fibers, adhesives, binders, coatings and other finishing materials may not exceed 10% of the board gross weight. Duct tape is allowed, however, it will be viewed negatively in the professional board makers evaluation.
This 10% limitation does not include other adhesives, glues etc. that may be found in
materials that are recycled for use in the sailboard, however, the Review Committee will view negatively excessive use of secondary materials containing more than 20% non-fibrous additives. A minimum of 90% of the board weight must be of
paper, paper board, paper pulp or other natural forms of fibrous papermaking cellulose.
- Board top view dimensions: The top view profile of the board must fit into a rectangle between, and
including, the dimensions of 12 feet X 36 inches to 9 feet X 20 inches.
- Foot straps are allowed and may be commercially available purchased items. The straps and fastening
hardware will not be computed into the board weight.
- IPST will provide each team with a standard mast foot, mast extension and anchor block.
- IPST reserves the right to conduct destructive testing of the sailboard at the end of the competition to verify any disputed results.
- Sample submissions for destructive testing will be four 12" X 12" samples of material identical to the
hull region skin of the sailboard. Thickness based on construction type (for "solid" structures
½" thickness will be sufficient). Samples should be flat or minimally curved.
- Tail fin and dagger board are required. Their construction must also be of "paper" material.
- Anchor block for base plate (mast equipment) can be of non-paper material. This material may
not exceed 20% of the sailboard top surface and is exclusively for anchoring the base plate
and dagger board.
- No form of reconstituted or solution cellulose is allowed in forming the board.
- The use of scrim material is not allowed.
[The DOE Review Committee reserves the right to continuously update the scoring protocol.]