Radio Controlled Soaring Digest January 1993 Issue
Issue Contents:
Composite wings can be made without vacuum. Use boards and concrete blocks together with mylar or acetate film to make good epoxy glass wings.
A contest format was made for the novice flyer which made things less intimidating for the beginner.
Stationary bike conversion stand for standard bike provided a way to make Brian’s bike a human powered launching machine. Garilla launch you say!
Additional information on programming the X-347 computerized ratio with glider modifications. These provide crow configuration and camber change.
Rick reviews the 2 day contest he CDed in Arizona which had rain
David Squires’ AFEDIT program allows one to compare airfoil shapes on computer screen. Edited airfoil can be used in other plotting program.
RG15 Thermal Eagel is improvement over Falcon 880 for low weight
Anabat HLG uses symetrical airfoil WE008 by Jef Raskin
Anabat series slope soaring ships are described as having low sink rateand good maneuverability. Raskin WE008 symetrical section and comp. design.
The construction of a fast building wing is shown. Model is made of foam board 1/4 in with smooth sides. High fun/cost ratio – 1 night project.
Spalinger S18-][ is a good flying ship but G. uses the FX-1261 airfoilw/ symetrical tips. Flown fast there is not tip stall.
Optimum neutral stability and dive testing behavior are again explainedwith decalage being another way to judge if at neutral stability.
Pt.6 of series gives some observations after making four wing pannels using slightly different materials. Suggests trying methods & using best ones 4U.
A review of Rolf Girsberger design objectives from Soartech 5. RG airfoils were modifications for Prof. Eppler’s designs.
Experience with Graupner Ventus + Keller 40/10 motor gives 15-20 deg climb for 1.5 minutes. Flight Lite C. Falcon 800 Elec with T tail & RG15 airfoil
Question: Is there an optimum wing loading? No! Because of changesin air velocity
Part I (Making a mold for fiberglass fuselage) takes ~80 hrs. Make plug
Comments on Marcs national sailplane symposium. Speakers: T.Edmons; S.Metz S.Neu; A.Doig; T.Renaud; M.Hill; Gene Chase; Martin Simons & others.
Stabilizer type(flying or hinged) makes little difference. Flat plates have higher drag than sym. airfoils. SD8020 shows low dead band and drag.
Slight camber in stabs may reduce drag at low speeds. Thickness of H.Stab decreases need for size. Thinner red. Cl max but larger red. induced drag.
In response to the question
Radio Controlled Soaring Digest January 1993 Issue
