Frank, I will see about posting the images. They are on several sheets as I didn’t have large sheets of vellum at that time. In addition, there are some screen captures from my foil software. Note that there is also detail information on what is considered the optimum form for the trailing edge for high performance sail boats that we don’t really have to worry about. I will speak about control surfaces for a bit during my presentation on the Seehund at the Conference. Classes challenge me to learn more about a subject that I thought I knew a lot about…age humbles us! J Have taken up naval architecture to better understand submersible design and hopefully provide a continuing income from yacht plan sales in older age. R/Jay Resepectfully, Jay K. Jeffries Andros Is., Bahamas Save the whales, collect the whole set. From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of ShellyDalg@aol.com Hi Jay. The sketches you mentioned would be useful for anyone building dive planes or rudders. I've seen some cross section views of Kort nozzles too that were pretty interesting. They're available with a quick Google search. As we've said, the usefulness and performance of any control surface will be intensified as the speed increases. With our slow speeds, maybe Dean has the right idea. Make them really large. The course of study you're engaged in sounds both interesting and intense. Old dog learning any new tricks ? Learning new things keeps your mind young. Keep at it. Frank D. |