Radio Controlled Soaring Digest January 2003 Issue
Issue Contents:
A small light winch is described using a Hobbico 40 starter motor. AnAluminum spool from a fly fishing reel #40 monofilament line a gutter spikewith a welded ring is used for the turn around. Works with HLG models to 2Mmodels.
Translated from German the article talks about setting the CG and Angle ofincidence (AOI). Advice from the 1st flight to final trimming. The divetest is a rough approach but mush better than the mfgrs suggestion.Porpoising Turning Spiral Behavior are discussed. If using a computerradio dont mix from the beginning but adjust separately then mix.Normal aileron differential is 3:1 or 2:1. Alternate R&L turns at 45 deg.Look for skidding. Limits for up elevator aileron deflection forF3J should not be aerobatic. Trimming for V-tail (Very Important).Minimize up ailerons with full crow flaps to retain directionalcontrol.
Good article on recargible batteries about inspection and maintenance.Using weak or questionable batteries is a bad risk. Same with connectorsany broken wires or bad connections are easy to replace.
The Golden Retriever activated by a heal switch on the winch foot switchassembly. When first activated the bale moves out of the way retrievingbegins. When flying alone it is recommended to stop retrievingwhen the winch line is being pulled along the ground. Parts diagram.
Comments on the Technology of Wanter Reimar Horton who first made taillessAircraft in 1934. They dont deserve credit for reflexed profiles whicheliminated the downward pitching moments at the expense of someefficiency. Wing flutter was a problem with swept back wings which twistedwith speed or high lift. Drag caused by tip vortices is larger thanall other sources combined at high lift slow flight. A semi-ellipse liftdistribution results in the least induced drag penalty. Hortonswent for a bell shaped lift distribution. The predicted L/d was never achievedbecause of washout which increased wing loading at highspeed. Adverse yaw produced by the tip vortex of the lifting wing.
Paul Recounts a number of humorous reasons why he has not completed hisACME AGF-9000 glider.
VSA National Rally is set for Aug 23-sept 1 in Tecachapi CAThe Midwest 7th Midwest Vintage/classic SP Regatta t-7-15 2003 inWabash Valley Soaring Society near Lawrenceville IL
Vintage Sailplane Association goals and relationship with the NationalSoaring Museum is discussed. The VSA maintains the exhibits.The Classic Division glider is at least 25 years old but is notcategorized as a vintage sailplane. Vintage sailplanes have been out ofproduction since 1958. Self help is available from the ClassicDivision of the VSA 1709 Baron Court Daytona Beach Fl 32124.
Contributors and others are being inundated with spam in their e-mail.A request is given to those who have solutions to the spam problem.
The Golden Retriever design described in this issue is shown on the coverpage with Dick McDonald launching.
Radio Controlled Soaring Digest January 2003 Issue
