I just tried a 5V processor cooling fan a 12V computer PSU cooling fan a 3V ducted fan of the sort used to cool your face (run at 5V without on-board batteries) with a 16cm dia polystyrene plenum. None could really lift their own weight - although (...) (22 years ago, 29-Nov-02, to lugnet.robotics)
(...) Get rid of this fixation with 'lift own weight' (you're -completely- ignoring the -primary- factor of time). Consider the exhaust of a car, pump it into a bag and you can lift the car to change the tire but you can stop the car by simply (...) (22 years ago, 29-Nov-02, to lugnet.robotics)
(...) I think you need a MUCH bigger area under the craft. If all the motors and stuff on top weighed (say) 100 grams, and you have just 16cm diameter skirt then you need a pressure of: 0.1 / (PI x 0.008 x 0.008 ) kilograms/square meter ...in order (...) (22 years ago, 29-Nov-02, to lugnet.robotics)
