The speed at which one can paddle an outrigger canoe, using only one arm, can vary depending on various factors such as the individual's strength, technique, and the specific design of the canoe. It's difficult to provide an exact speed as it can differ from person to person. However, in general, paddling with one arm will likely result in a slower speed compared to paddling with both arms.
When it comes to the number of strokes per minute required to achieve a reasonable speed with two paddlers on board, it also depends on factors such as the size and design of the canoe, the paddlers' skill level, and the desired speed. However, in competitive outrigger canoe racing, it's common for teams to maintain a stroke rate of around 60 to 80 strokes per minute. This pace allows for a good balance between speed and efficiency, considering the physical capabilities and endurance of the paddlers.
It's worth noting that in outrigger canoeing, the synchronization and coordination between paddlers are crucial to maintain stability and maximize speed. The paddlers must work together, following a unified rhythm and stroke technique, to achieve optimal efficiency and propulsion.
If you have access to an outrigger canoe and are interested in determining your own speed and stroke rate, it would be best to experiment and practice in various conditions to find the most suitable and efficient approach for you and your team.