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  1. J

    Simple hydraulic control linkage?

    I'm trying to work around a elevon control linkage problem, one where I want to be able to rotate the wing for transport/storage without disconnecting the controls. The obvious way around this is to use Teleflex cables, but they are still pretty stiff and quite heavy. The maximum control...
  2. J


    I've recently been re-reading the various articles by the George Spratt's on the controlwing. I've also read a couple of papers about it on the NASA tech server. As far as I can see, it seems a simple principle, quite well suited to a microlight (ultralight) or low speed light aircraft. The...
  3. J

    Airdrome Airplanes Eindecker weight?

    I have an acquaintance who is interested in building one of these, under the new UK ultralight rule (weight less than 115kg (254lb), wing loading under 10kg/m² on empty weight). The manufacturer quotes an empty weight of 238lbs, which is fine if it's achievable, but it seems a bit light to me...
  4. J

    Spoilerons - pros and cons?

    As some of you know, I've been working on a very light (65kg empty weight) design for a while now. I'm reviewing the design yet again with a view to getting more weight out of the structure, and the idea of using spoilerons for roll control has popped into my head as a lighter alternative to...
  5. J

    Lifting body discussion

    I'm sitting at home with a nasty cold, so have been catching up on a pile of stuff I've printed out over the last year or so, meaning to study again one day. I have just re-read Barnaby Wainfan's papers on the Facetmobile, and as usual it's sparked my curiosity as to just why this design (or...
  6. J

    Fin up - Fin down?

    I appreciate your patience in answering my questions so far, and giving some very useful points to take into consideration. This next one may seem to be a little simplistic, but try as I might I've not seen anything in any of the books I have that gives any useful advice. As many of you...
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