COXLESS DOUBLE SCULLS

In this example, we have used a hull design by Graeme King. The hull has a design displacement volume of D=0.211 m3; the underwater portion has length L=10.25 m, draft T=0.132 m, and beam B=0.351 m. The offsets of the hull were scaled to nominal displacements for the various classes.

The following table shows the dimensions of the underwater portion of the hulls used for each class. For all cases, we have assumed that the hull and other deadweight weighs mB=39 kg. Nominal average rowers' weights are m1=57 kgs for LW, m1=75 kg for HW, m1=72 kgs for LM, and m1=95 kg for HM.

Class
Volume
(m3)
Length
(m)
Draft
(m)
Beam
(m)
LW 0.153 9.214 0.119 0.315
HW 0.189 9.887 0.127 0.338
LM 0.183 9.781 0.126 0.335
HM 0.229 10.540 0.136 0.361

The following table shows the sectional times for the various classes obtained by averaging results from three recent world championship events. Also shown are the sectional times estimated using the present mathematical model and the peak force (to the nearest Newton) required to achieve the same finishing time as the (averaged) race results.

Class
Source
500m
1000m
1500m
2000m
LW
Race Data
Fmax=228N
 102.6
100.7		 209.1
206.7		 315.0
314.4		 420.8
420.4
HW
Race Data
Fmax=276N
 97.3
97.4		 200.6
202.2		 304.9
305.5		 410.0
409.6
LM
Race Data
Fmax=315N
 92.8
90.2		 188.0
185.3		 282.1
280.9		 376.5
376.5
HM
Race Data
Fmax=371N
 91.3
89.0		 186.5
184.1		 280.4
279.1		 374.9
374.9

It is interesting that the times for the two male classes are very similar. Although we would normally expect the heavyweight men to do better than the lightweights, it should be remembered that there are few events planned for lightweights at the Sydney 2000 Olympics and therefore the 2X is likely to attract the world's best (lightweights).