Just had a thought on this... from what I've seen of available paddle launch design I'm reckoning that I weigh a LOT more than the water being lifted by a fixed paddle... would it really be that big an issue? That said it doesn't look that complicated to use it if I can find some already dimensioned (roughly) drawings to use.... how much eccentric to give the feathering heel etc (in terms of a fraction of the paddlewheel diameter I expect....) chrisc ________________________________________________________________________ This e-mail, and any attachment, is confidential. If you have received it in error, do not use or disclose the information in any way, notify me immediately, and please delete it from your system. ________________________________________________________________________ MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.