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verticle lift using ducted fans
- Thread starter MAHONRI7
- Start date
GregLocock
Automotive
In ground effect or not?
Cheers
Greg Locock
Cheers
Greg Locock
GregLocock
Automotive
P=1/(2^.5)*T/M*(T/(rho*pi*R^2))^.5
T is the thrust, M is the figure of merit for the design, take between 0.5 and 0.8 for a ductless rotor, rho is the air density, R is the radius of the rotor and P is the power required.
From this you'll see that your duct would have to be very efficient indeed. You'll probably need a gearbox as well, but I can't be bothered to work the speeds out.
Cheers
Greg Locock
T is the thrust, M is the figure of merit for the design, take between 0.5 and 0.8 for a ductless rotor, rho is the air density, R is the radius of the rotor and P is the power required.
From this you'll see that your duct would have to be very efficient indeed. You'll probably need a gearbox as well, but I can't be bothered to work the speeds out.
Cheers
Greg Locock
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