k10e3r
1 mW
- Joined
- Jul 30, 2021
- Messages
- 19
Importent is
- Reynold number http://physiquecira.free.fr/CoursPhys/colebrook/ReynoldsCalculateur.htm
2m bike 25m/s air 20°C ->Re= 3 333 443
- Percentage of laminar airflow. That's where the fairing is helping.
Let's say Cx=0.1 if the bike is 1.5m high and 0.5m whide, we get (30N)->750W Aerodyanmic drag.
After that it gets realy complicated
To my opinion for this type of project aerodynamic at that speed is not that importent.
90% of the power will be used in accelerations.
Geometry and mecanic is more importent to me to have a bike that is reliable (easy to handle) and light weight.
- Reynold number http://physiquecira.free.fr/CoursPhys/colebrook/ReynoldsCalculateur.htm
2m bike 25m/s air 20°C ->Re= 3 333 443
- Percentage of laminar airflow. That's where the fairing is helping.
Let's say Cx=0.1 if the bike is 1.5m high and 0.5m whide, we get (30N)->750W Aerodyanmic drag.
After that it gets realy complicated
To my opinion for this type of project aerodynamic at that speed is not that importent.
90% of the power will be used in accelerations.
Geometry and mecanic is more importent to me to have a bike that is reliable (easy to handle) and light weight.