100mm kayak drive system

thingiverse

It seems like you're working on a project involving modifying a kayak to include a jet drive system. Here are some observations and points to consider based on the information provided: 1. **Motor Selection**: The motor selected, a 12V DC electric motor with an 8mm shaft and operating at 2700 RPM, appears suitable for your application considering the size of your kayak. However, you might need to adjust the propeller or sprocket configuration to optimize performance. 2. **Coupling**: The coupling you've chosen seems like a good option for connecting the motor to the shaft that will drive your jet pump. Aluminum couplings are often durable and resistant to wear and tear, especially in marine environments where corrosion is a concern. 3. **Housing and Motor Mounts**: These components are crucial for ensuring both efficiency of the system and safety by preventing water ingress into the electrical components of the motor. It's wise that you're planning to post about them later once you've fine-tuned their design for your kayak. 4. **Kayak Selection and Hull Modification**: The use of a Lifetime Tamarack, Tahoma, or Tioga kayak is interesting because it leverages the existing hull without requiring significant modifications in terms of hull shape. However, integrating a jet drive system will necessitate some adjustments to ensure proper fitment and functionality. 5. **Cost Considerations**: With an average price range for the Tahoma model being around $170-200, you're on the lower end of kayak prices but still within a reasonable budget for many enthusiasts. The cost of your custom mount, sterntube, and electrical components will need to be factored into your overall project expense. 6. **Safety Considerations**: When modifying any watercraft, safety is paramount. Ensure that your modifications comply with all local regulations regarding vessel modifications, especially if you plan to use the kayak on public waters.