Assuming my full kit and I weigh 82kg total, I have estimated that I need 5hp. To calculate this, I used the formula:
weight force (W) is F = m g
W= 82kg*9.8 ms/2 =401.8 Newtons
Now, if the drag ratio is 9:1 that means that there is also 401.8 Newtons of Lift (L) and 45 Newtons of Drag (D): D= L / (L:D) 45= 401.8/9 So if 45 Newtons are required to be overcome drag, this is the thrust the engine must produce. Using a rule of thumb of 11 Newtons per Hp that equals 4.05 Hp. I rounded this up to 5hp for climbing. Is my math correct? 5hp seems low compared to paramotors on the market with 20+hp. I would also need approximately 10kg of thrust, 82/9=9.1 rounded up to 10