Bob Merrett Posted November 4, 2013 Share Posted November 4, 2013 Can I just ask, when using the scales under the wheels method, does this establish the CG "as built", based on the completed weight, or actually establish where the CG "should be". Thanks! Quote Link to comment Share on other sites More sharing options...
Pat (rActive) Harbord Posted November 4, 2013 Share Posted November 4, 2013 As built, should be comes from measuring as indicated on plan or manual Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted November 4, 2013 Share Posted November 4, 2013 Hi Bob, it establishes where the c of g is when weighed. The model must be level however. I use an incidence gauge on the wing so that I know what "level" is then measure the distance the tailwheel is from the bench so that I can reproduce this with the incidence gauge removed. (A spirit level on the datum would also work.) The title is a bit confusing, but the section is as you say, about calculating where the c of g "actually" is on your model, not where it "should" be. I have subsequently read that Phil Clark doesn't find the Vanessa works very well for lighter models, (cannot see why not) but perhaps the tension in the lines etc alters the results slightly??? Cheers Danny Edited By Danny Fenton on 04/11/2013 11:01:18 Quote Link to comment Share on other sites More sharing options...
Bob Merrett Posted November 4, 2013 Author Share Posted November 4, 2013 Thank you for clearing that one up! I am okay with the Vanessa principle, still need to knock one up though, it was just understanding the scales method. Cheers, Bob. Quote Link to comment Share on other sites More sharing options...
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