The "hard to describe",is the catch in this .
I got paid lots of money , to fully describe what really caused accidents.
I learned quickly that "if you can't describe it in plain ,everyday conversational speech--- you really don't fully understand it ".
Pretty harsh - but true.
Technical jargon and graphs do NOT play well in court.
Neither does "If you can't convince em - confuse em".
Last week we went to an indoor flyin- some of the old farts (my age) had beautiful film covered craft - tiny motors - magnetic actuator "servos" etc..
Their craft followed the design criteria common on indoor rubber and microfilm setups.
Weights ranged from a very few grams to 2 ounces for the really big stuff.
Absolutely fascinating at how different the approach is, between these and the electric aerobatic foamies.
They used heavily washed wingtips , super stable CG positions which self stabilized etc..
Our stuff simply would dart around or fly at any attitude - due to extremly high power to weight.
The obvious difference was in wing loadings - tho my bipe has a loading of 3.8 oz per sq ft-at 400 squares - it was an absolute tank -compared to the large film covered models.
How do you do a wind tunnel test on a model which flys at grams per acre loading?
A hard sneeze would wreck these models.
Obviously, the old tried and proven rules of wing configuration (inc washout) work at these numbers- but then - so do the flat foam plates -
Looks like I get to do some more comparison srudying --