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Shaw & Tenney Oar Length Formula for Correct Length Oars


Take one-half of the dinghy's beam measurement in feet (taken at the oarlocks). Multiply that figure by 25, divide the result by seven, and round the answer up to the nearest six-inch increment if the boat is over 10 feet long, or down if the boat is under 10 feet long.


Let's say that your boat has a four-foot beam and it's roughly 12 feet long.


Multiply two (half the measurement of the beam in feet) by 25 and you'll get 50. Now divide that by seven and you'll get 7.14 feet. Take that and round it up to seven feet, six inches and that's the length of the oars that you need. Good luck and happy rowing.



Guide To The Correct Oar Length for Your Boat, the simple way.

DISTANCE BETWEEN ROW LOCKS

HALF

DIVIDE BY 7

X 25

APPROX. OAR LENGTH

INCHES

CENTIMETRES

CENTIMETRES

CENTIMETRES

CENTIMETRES

CENTIMETRES

36”

91.44

45.72

6.53

163.29

160

40”

101.6

50.8

7.26

181.43

180

48”

121.92

60.96

8.71

217.71

210

54”

137.16

68.58

9.8

244.93

240

60”

152.4

76.2

10.89

272.14

270

66”

167.64

83.82

11.97

299.36

310

72”

182.88

91.44

13.06

326.57

340

80”

203.2

101.6

14.51

362.86

370

The type of boat / freeboard height will affect things. If there is a requirement for the Oar Handles to overlap one another when rowing, then add 10 cms
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