Radio Controlled Soaring Digest December 2005 Issue
Issue Contents:
Peter has published many articles on his PW airfoils in Aufwind and Several models are being produced with his airfoils. These are well suited for plank flying wings because of their zero pitch moments (Cm0.25) Coordinates are given W51 is for slope flying and aerobatics PW106 is for thermal oriented slope flying PW98 is for more sophisticated slope flying with more accuracy needed in building PW75 is for slope and thermal flying + aerobatics. Higher Cm0.25.
Andy Talks about his Bird of Time a 1979 design. It is a 118 Inch span model build in 2002 from RCM plans. Modifications include a built up rudder carbon fiber spar caps 2 servos for driving the spoilers in the wings FG over wood fuselage and a skeg for landing. Photo was taken after a 65 minute flight.
Hitec HS-81 MG and HS-85 MG servos are compared. Several HS-81 MGs were compared. It was noted that the travels and speeds differed between servos to the extent that it caused a crash when landing his flip with flaperon control. Computer radios can made the servo travels the same but not the rates. Sherman Knight says servos from different batches might contain different parts and hence different ranges. The Y harness method can get you into problems.
Windrider Aviation BAT kit Review. It is a 2 Channel elevon controlled model. It comes with pre-molded EPP wing halves balsa elevons control linkages pre-cut V.Stabs CF rods to mount the stabs on.The plane takes 10 oz. of lead in the nose for balancing. A Hitec Neon SS 2 Ch radio was used. It launches with a highstart of slope toss. Good for all but very light lift conditions. Pitch stability is a problem at high speeds. Control linkages need to be stronger. Opaque tape for covering would be an improvement.
Tom took a GWS Spitfire which he had crashed and converted the model to a sloper w/o the motor prop and motor battery. Weight was needed in the spinner and a washer behind the spinner for balance. Wing loading was 7.8 oz/sq ft and the total wt. of 20 oz. Other improvements noted. Makes a good sloper.
Lee recalls how he started to fly full size gliders before getting his license to do so by himself. His experience this time is with a Grob 103 with Kieth Colmer at the Las Vegas Valley Soaring Association in Jean Nevada.
The SZD-24-4A Foka 4 Standard Class (15 m)sailplane is reviewed. Made by AZD Dielsko in Poland in about 1961. The front part of the fuselage is fiberglass but all other parts are wood and fabric or plywood covered. Owned by Gary Busk.
Comments about content of articles in this the largest RCSD with 50 pages. This article also includes airfoil coordinates for tested flying wing applications.
Cover photo is of Andy Pages Bird of Time at Seattle Area Soaring Soc. Field.
Radio Controlled Soaring Digest December 2005 Issue
