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#841
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Doran, I did the basic design for my foils including planform,selecting the foil loading and section but the engineering was done thru John Ilett and the guys who built the 40' Spitfire. They were engineered for the loads they anticipated when jumping. The main foil is 3.5 sq.ft including 50% of the 45 degree angle dihedral tips and the rudder foil is 50% of the mainfoil area. I can write Mark Pivac in Australia if you'd like and see if he'd be interested and then put you in contact with him. Don't forget Tom and do you know Ray Velinga? Pivac and team designed this:
__________________ yes, it is a revolution ---"So (yet) another new world begins." Andrew Hurst, editor of Seahorse magazine, August,2011 |
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#842
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__________________ Samuel Schneider http://sr-71monofoilerproject.blogspot.com/ |
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#843
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Looks like alot of hardwork, getting plug just right can take hours. Just noticed a link about nida PP core. I have only used competitors products and have had a whole range of problems bonding to the PP core... Nothing seemed to stick apart from more PP/Glass. I'd carry out peel ply tests before you lay up your whole mould. Ps keep up the goodwork. |
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#844
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| ...publishing also helps if you're ever likely to commercialise something derived from what you're doing, even in a very small way. Stops anyone patenting it later and chasing you for licence fees for something you did before they even thought of it. |
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#845
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| How true. Like the Langley Aerodrome. |
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#846
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__________________ Samuel Schneider http://sr-71monofoilerproject.blogspot.com/ |
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#847
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| Sounds like you have it all in hand. I'm not sure i'd add the micoballons to the epoxy, great for making a light weight filler but not so great for gluing. Are you laying up on your plug or making a female mould? I came across the following video on youtube that shows an interesting way of laying up.. http://www.youtube.com/watch?v=mROBlWIu8q4 Personally i'd stick with the method your using, but thought you'd still find it interesting. |
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#848
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Nida Core is a polypropylene copolymer; I've not had success using epoxy on polymer materials in wet situations. The manufacturers provide NidaBond which might be a better adhesive for this material.
__________________ "Boats are like rabbits; you can have one boat or many, but you can't stop at two" - A. Onassis Boat designs: "a convoluted collection of discontinuous compromise" - Par ". . . ere the end, some work of noble note, may yet be done . . ." -Tennyson Dances with Turkeys |
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#849
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__________________ Samuel Schneider http://sr-71monofoilerproject.blogspot.com/ |
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#850
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Any way to roughly estimate when you'll have the first boat ready to test?
__________________ yes, it is a revolution ---"So (yet) another new world begins." Andrew Hurst, editor of Seahorse magazine, August,2011 |
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#851
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| Quote:
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__________________ Samuel Schneider http://sr-71monofoilerproject.blogspot.com/ |
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#852
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| Best of Luck!
__________________ yes, it is a revolution ---"So (yet) another new world begins." Andrew Hurst, editor of Seahorse magazine, August,2011 |
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#853
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| Since you so cordially answered the question it would be interesting for you to ask the questioner to reciprocate and explain his schedule to you... |
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#854
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| I am designing a new lifting foil and I need to calculate the material stress, as I am pushing the limits pretty hard. I figured out how to estimate moment of inertia, but I don't know what distance to use from the neutral axis to the foil surface, mostly because I don't know how to find the neutral axis for the foil section I am using. Does anyone know how to compute this axis for an airfoil? Thanks in advance. |
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#855
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You could probably approximate the section with composite shape made up of rectangular sections. The more sections, the more accurate it would be. If it was me, I would probably just eyeball it. The loading uncertainties (wave loads etc) probably don't justify using a figure with a high degree of accuracy. |
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