Wing loading formula - the nonscientific way - no need to use a Cray or similar :-)! Basically it is just weight through wing area - if the wing is tapered, you have to project a root rib on the centre line (if the wing doesn't pass right through, that is): For a rectangular wing area is width x span For a tapered wing (root width (see above) + tip width)/2 x span (but see below for an easier way to do it). For extremely complex planforms it becomes more complicated - my recommendation is to take the building plan and cut out one wing panel as exact as you manage. If you have a good scales you weigh the plan. Now cut a ten by ten inch square of the same plan. Weigh it! Now you'll divide the wingpanel weight x 2 with the square's weight and you have a fairly exact measure of how big the wing is if you multiply the result with a hundred :-)! Doesn't matter if the wing is less than 100 sq. inches - the method still works! If your scales aint that exact you should make a template out of cardboard of the wing outline and ditto with the square - same piece of cardboard must be used as to ensure it weighs the same per sq. inch! And then redo the division of weights - as above! In most cases it is just enough to measure the width at half-span (that is halfway between the tip and the wing root) and multiply by the span of the wing! Works with tapered wings, as well as with rectangular, as well as with swept wings like Boomerangs and Zagis! Yours, Tord, Sweden -- If reply difficulties - use [EMAIL PROTECTED] Tord S. Eriksson, Ovralidsg.25:5, S-422 47 Hisings Backa, Sweden RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
