The current crop of moulded high tech sailplanes are purpose designed for the serious world class level flier and as such the designer and supplier both expect the purchaser to have the basic knowledge of rudimentary aerodynamics including CG location, and control throws. It is somewhat analogous to giving instructions on how much to turn the steering wheel or change gears to an Indy Car driver.
While a starting CG location and tow hook position would be a welcome, the old 30% MAC with the hook 1/4" ahead is a conservative and reasonable place to start, but if the purchaser does not already know this rule of thumb, he is not ready for the model. Flying styles and final controls settings are a very individual thing, and just because JW or DP recommend the settings does not guarantee that you or I can fly the models so rigged. In the not too distant past people graduated through the ranks, from the Gentle Lady type models to the then current state of the art models, all the time learning by crashing and repairing, the subtleties of trim and design. With today's "Plug and Play" type world and the availability of superb professionally built designs, people are short-cutting the process and going straight for the top, without a full understanding of the basics. There is always a "pucker factor" in setting up and flying a new model and progressing a step up the performance ladder is a good thing. However, make sure your basic aerodynamic knowledge keeps in pace with your desire for the coolest model. The choice is yours and if you chose a Ferrari make sure you are prepared to handle it. A six servo wing won't do much for you if you don't know diddley about CG location or control settings. -- John O'Sullivan Nova Scotia Wind and Wave Models http://www.windandwavemodels.com/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
