Speed VS Horsepower

Here is the data on Mike Daly's website converted into horsepower using a
conversion factor I worked out which gives hp = kt x lb x 0.003072.
I also added the speed in mph using mph = kt x 1.15 for people who
are not used to speed in knots.


Speed
kt mph Endurance Nordcapp Solstice A. Hawk Sonoma Winters
2 2.3 0.006 0.006 0.006 0.006 0.005 0.012
3 3.45 0.019 0.017 0.019 0.018 0.017 0.025
4 4.6 0.044 0.044 0.045 0.044 0.047 0.066
4.5 5.18 0.065 0.073 0.073 0.065 0.096 0.111
5 5.75 0.099 0.124 0.124 0.095 0.179 0.215
6 6.9 0.208 0.265 0.262 0.208 0.266 0.535


comments:

1. 1/20 hp = 0.05 hp which puts an average canoeist (Winters) at about 3.5 mph
and a kayaker at 4.5 mph in a dead calm.

2. an athlete can sustain 1/4 hp = 0.25 hp which puts the athlete
at about 6 mph in a canoe and 7 mph or more in a kayak.

3. a solo paddler can't go 7 mph in a canoe but a canoe can have 2
paddlers and that means more surface friction.

4. to go 7 mph the paddlers in the second fastest pair of kayaks have
to work about 30% harder than the paddlers in the fastest pair of kayaks.

5. it's a shame we don't have the resistance broken down into
friction and wave-making. That would be interesting to examine.


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