maxsurf sailbot design
Budget: $30 – $250 USD
Complete the concept design stage of a TP52 class racing yacht as per below:
Design constraints:
• The designed yacht should comply with 2011 TP52 class rules.
Deliverables:
A report should be submitted with at least the following sections:
1. Executive summary
2. Hull design section
a. Details of hull lines generation should be reported
b. Sectional area curve
c. Hydrostatics
d. Body plan, profile and waterlines
e. Symmetry of lines at 7.5 degrees of heel + 1 degree leeway, 15 degrees of heel + 2 degrees of leeway and 22.5 degrees of heel + 4 degrees of leeway
Hull lines 3-D in msd format should also be submitted
3. Stability calculations section
o Adjustment of steady state sailing angles
▪ Creation of a spreadsheet using Hazen’s method
▪ Calculation of heel force for the upright condition with the spreadsheet for the upwind sailing condition (AWA:27 degrees, AWS:25 knots)
▪ Estimation of heeling moment in the upright condition (distance between CE-CLR)
o GZ curve optimization
▪ Adjustment of steady state sailing angles (should not exceed 25 degrees for the AWA 27 degrees + AWS 25 knots case)
▪ stability range adjustment (min. 125 degrees)
o Ballast requirement definition (as per above)
o Loading condition
Weight (kg)
Z (m from WL)
Bulb
define
define
Rig
300
10,700
boom
30
3,200
Fin
1000
define
Hull+Deck Fit out
2200
0,700
Additional Crew
1000
1,9
Sails and Stores
205
0,35
anchor +chain
60
-0,15
4. Appendage design section
a. Sizing of the appendages
i. Bulb: should be sized during stability calculations
ii. Keel: section shape, profile, lift generation characteristic should be defined in order to balance the side force calculated during AWA 27 degrees + AWS 25 knot case), use 2-d CL data from “Theory of wing sections” and modify the CL for your aspect ratio and get lift. Aim at max. 4 degrees of leeway in this case.
iii. Rudder: use empirical area ratios
iv. The design should be incorporated to the profile drawing and 3-d hull in msd format.
5. Performance estimation section
a. Upright resistance calculations & engine power estimation (excel spreadsheet-by hand using Delft series)
b. Upright resistance calculation & engine power estimation by software & comparison with hand calculations
c. VPP by Span (report)
6. Profile drawing (printed sketch in A4, with suitable legend)
it should be in maxsurf
Design constraints:
• The designed yacht should comply with 2011 TP52 class rules.
Deliverables:
A report should be submitted with at least the following sections:
1. Executive summary
2. Hull design section
a. Details of hull lines generation should be reported
b. Sectional area curve
c. Hydrostatics
d. Body plan, profile and waterlines
e. Symmetry of lines at 7.5 degrees of heel + 1 degree leeway, 15 degrees of heel + 2 degrees of leeway and 22.5 degrees of heel + 4 degrees of leeway
Hull lines 3-D in msd format should also be submitted
3. Stability calculations section
o Adjustment of steady state sailing angles
▪ Creation of a spreadsheet using Hazen’s method
▪ Calculation of heel force for the upright condition with the spreadsheet for the upwind sailing condition (AWA:27 degrees, AWS:25 knots)
▪ Estimation of heeling moment in the upright condition (distance between CE-CLR)
o GZ curve optimization
▪ Adjustment of steady state sailing angles (should not exceed 25 degrees for the AWA 27 degrees + AWS 25 knots case)
▪ stability range adjustment (min. 125 degrees)
o Ballast requirement definition (as per above)
o Loading condition
Weight (kg)
Z (m from WL)
Bulb
define
define
Rig
300
10,700
boom
30
3,200
Fin
1000
define
Hull+Deck Fit out
2200
0,700
Additional Crew
1000
1,9
Sails and Stores
205
0,35
anchor +chain
60
-0,15
4. Appendage design section
a. Sizing of the appendages
i. Bulb: should be sized during stability calculations
ii. Keel: section shape, profile, lift generation characteristic should be defined in order to balance the side force calculated during AWA 27 degrees + AWS 25 knot case), use 2-d CL data from “Theory of wing sections” and modify the CL for your aspect ratio and get lift. Aim at max. 4 degrees of leeway in this case.
iii. Rudder: use empirical area ratios
iv. The design should be incorporated to the profile drawing and 3-d hull in msd format.
5. Performance estimation section
a. Upright resistance calculations & engine power estimation (excel spreadsheet-by hand using Delft series)
b. Upright resistance calculation & engine power estimation by software & comparison with hand calculations
c. VPP by Span (report)
6. Profile drawing (printed sketch in A4, with suitable legend)
it should be in maxsurf