Wind & Wet

Vertical axis wind turbine models

2 blade H rotor

H rotor VAWT model

This is a larger model with a lower solidity compared to the previous models. The blades were made with a wooden leading edge and a cardboard trailing edge to give an approximately symmetrical aerofoil section.
Radius
200mm
Number blades
2
Blade chord
93mm
Blade thickness
15mm
Blade thickness (%)
16%
Blade length
580mm
Frontal area
232000mm2
Density
0.47
Blade area / frontal area
This was very reluctant to self start or even turn in low winds. I nearly gave up on it, but tried it on a windy day and it took off.
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