Radio Controlled Soaring Digest November 2002 Issue
Issue Contents:
A review of center of pressure concept that was used early in aviation.Moment arms must be balanced for stable flight. An understanding of theconcept leads to better trimming and pitch stability. Diagramsand good explanation of the concept.
A comparison between flying wet power models and gliders. Soaring isabout building and hunting … for good air. The hunt separates us fromother variation of RC modeling.
Things to know when traveling to a foreign country or by air domestically.Nomad Sailplanes “MP” is a 55″ that can fit into a box 22x5x7 when the tailis removed. The center section can be left out for sloping andfits into a normal suitcase. This is a BIG advantage. Flying withthe center section provided good performance at HLG Golf eventThe short span flies very well. Description of how it comes apart.
Older polyhedral kits were designed by free flight experts. They weredesigned to fly well at one speed and resist changes in speed and attitude.Full house models are more accepting to the input of the pilot forspeed and bank angle when the CG is back where the model doesnt have tokeep the nose up with up elevator or decolage in the tail. This results in lower drag and higher performance.
Dave Revisits the issue of wing size performance optimum A/r of about10. 50 second flights from DLGs are not uncommon. New DLGs usuallyhave thinner airfoils and lower camber. Gyros are requiredThe optimum in design criteria have shifted. Drella AG12 is comparedto SA7035. Laminar flow airfoils on wind turbines were found tolose efficiency due to bug strikes. AG-12 better suited for slow flightwhen using low aspect ratio wings. Good article!
Second announcement that B 2 Streamlines discontinues the sales ofsoaring books.
Cover cartoon shows inattentive fliers walking over an active winch line
Radio Controlled Soaring Digest November 2002 Issue
