Radio Controlled Soaring Digest May 2004 Issue
Issue Contents:
Australian winch design shown. Drums are up higher than US designs.Seattle Area SS uses trailers to move winches and batteries around the field.
Drum design (depth and width) control how the speed and how speed buildsduring launching. Ball bearings vs. bushings make a big difference. New
New brushes are recommended and using a line guide 10 in frontof retriever is recommended to keep retriever working well. A large knife switch is used to break the power if the cellanoid sticks. Three batteries in parallel are used for long contests.
3 kinds of NiCd charging is defined. Forming charge is the first chargeof a new pack is 10% of capacity (0.1C) This is recommended every 6 months.Best Charge uses a peak detection charger. Batteries should endwarm. If not the battery is not fully charged. Rate should be .25 to .35CEmergency Charge is 2C charge for NiCd and 1C for NiMH. This cannot fully charge the packs because of slow diffusion in the battery. Do not keep packs on trickle charge for weeks at a time.
A listing of Museum collections related to air sports aeronauticsAstronautics. www/fai.org home page provides a wide range of information.Maynard Hill is honored by Aviation Week Space Technology for crossing the Atlantic Ocean using an 11 lb model.
Gordy continues his discussion of the function of control surfaces. He uses examples of his Pike Superior when the Elev. Servo unplugged. He handled the situation by using landing flap for pitch control. Usually a deployed flap calls for major down elevator mixing.
Gorilla Glue is a new moisture cure polyurethane adhesive having many uses.There are hazards see MSDS at www.gorillaglue.com similar to ProBondby Borden. Applications include EPP joints NiRods spars wing saddles.
Alula is a forward swept wing EEP foamy that goes well at slermal flying(thermals + slope flying) Michael Richter is the designer. Other modelsare weasel and mini weasel. Alula refers to the thumb featherson the LE of a birds wing. Exceptionally low speed performance. Modeldoes not require covering and is inexpensive. Weight is 100 g2.3 oz/ft 2. Kit price is ~$50 in summer of 2004. Tip launches to 40 ft.
Jerry discusses the methods used by the Clearlake Modelers RC Club.Students alternated getting the highstart launching and flying. Flyingwas done with a buddy box. Plenty of explanations were used togive the students an understanding about why things happen.
June 13-15 2003 and Monticello IL was the time and place for the JRAerotow. Article includes beautiful pictures of Aerotow Scale Models.This years event will be at the same venue on June 10-13. Therewill be some full size sailplane activity.
RCSD readers respond to RCSD being free and down loadable from the Internet.
Dan Troxells Grunau Baby 40% scale model at the JR Aerotow 2003 event heldin Monticello IL is shown on front page.
Radio Controlled Soaring Digest May 2004 Issue
