How many average sized crows would it take to lit an average sized speedboat off the ground. Ignore the practicalities of this and added weight of what ever you used to attach the crows to the boat. Just looking for the maximum weight a crow could lift and the how many it would take to lift the speedboat. A little random, I know, but important to me!
I think you've posted this in the wrong section...try the science section...they have people there that can tell you how long it will take for a fish to ride a uni-cycle across the Gobi desert...even allowing for a change in the wind... and punctures..!