FIRST want rectify error August 1988 column discussed determine center-of-gravity canard tail-first airplane noted sign term involving tail length changed should multi plied two converting equation tail-last equation canard equation Unfortu nately canard equation appeared August column 2 multiplier missing Its really necessary get canard center-ofgravity equation printed correctly appears low Equation 4a 4a CG Stab Area 3 x Wing Area R2 P T Several months back got letter Bill Hintz Glendora CA looking plans old RC designs should have known better couldnt think sources Since published Bills request August column have received two letters containing sources already knew about first came Doe Mathews Mls RC Old-Timers colum nist suggested readers send $1 RC plans list John Pond Plan Service Box 90310 San Jose CA 95109 Apparently John re lies word-of-mouth advertising because Ive never seen magazine ads about plans ser vice though knew about second came Tom Dixon Suite 401 1938 Peachtree Rd Atlanta GA 30309 has plans service also knew about addi tion long list airplanes vin tage RC catalog also has plans several air planes catalog include deBolt Livewire Cruiser Jenny Berkeleys Royal Rudder Bug Bootstraps RC Sprengs Stormer Roots Ascender Guillows Vanguard Send $2 Tom vintage RC plans catalog remember September column said going write column dealing servo torque requirements MAs associate editor good enough remind George M Myers Model Aviations Radio Technique col unmist already covered topic extensively back 1981 no real need spend lot effort reinventing wheel interested learning about subject can dig out issues Model Aviation March April May 1981 read Ra dio Technique first two cover servo torque requirements last about picking battery thats right servos choose dont have access back issues will copy articles mail people send SASE SOC postage Hey Ron put glass cloth balsa-covered foam wing walking Eglin AFB FL ran fellow club member Fred Carnes asked question fin ished telling him suggested would good column topic prefer put glass cloth balsa wing skin before skin put foam wing Its easier glass cloth protects balsa its being bent around wing con tour particularly wing skin wrapped around wing leading edge However regard less stage put glass cloth wing skin technique same should fill imperfections balsa wing skin minor glass cloth will good job filling over balsawood grain dont expect miracles use Sigs lightest glass cloth wing fuselage 2A- 3A-oz-per-sq-yd cloth should work fine glass cloth should cut slightly oversize about inch plenty Lay cloth balsa smooth out much possible Any win kies remain will come out apply ep oxy glass cloth use Dave Browns Mix A-Matic 30-mm epoxy thinned rubbing alcohol watery consistency stick cloth start center end cloth work outsides toward opposite end cloth completely stuck down excess epoxy must blotted up surface will uneven youll add too much weight use roll toilet paper roll surface aid axle made short section broom handle inserted toilet paper tube roll particular direc tion youll quickiy find out paper will stay roll rather rolling out glass cloth Remove few sheets roll becomes saturated epoxy discard Continue rolling surface until glass cloth securely stuck down balsa no epoxy being picked up Its easy tell stop rolling will get quite effortless Initially will kind sticky easy roll paper across cloth Ill bet 52 Model Aviation Radio Conoi Sport Aerobatics Ron Van Putte Ill Sleepy Oaks Rd Ft Walton Beach FL 32548 does go difference between men boys price toys George Olsen wrapped plywood white pine around Craft-Air plastic field box added wheels toy truck painted decorated achieved Aircraft Service Truck field box George editor club newsletter Clearwater FL Heres closer look George Olsens scalelike field/flight box Bumpers steel straps some decorations thumbtacks looks right Giant Scale rallies Its no RC truck thought rolling something college kids did trees during football season epoxy has cured excess cloth extends past wing tips trailing edge easily cut off using sanding block #240 grit sandpaper use #400 grit wet-or-dry sandpaper sand whole wing keeping moistened using rubbing alcohol applied squirt bottle will leave sur face smooth ready painting thats other story didnt mention earlier put 6- 8-inwide piece 1 /2-oz-per-sq-yd glass cloth over wing center section overlap lightweight cloth its applied Since usu ally put lightweight cloth side wing time ie top left center sec tion wing will end up being reinforced three layers glass cloth Anything breaks wings going break whole lot other things too Words wise Check operation receiver switch Sometimes switch pos itive enough its action engine vibration can cause switch tom oW Another potential source problems Du Bros Kwik Switch Mount usually reliable effective way mount receiver switch since requires hole side fuselage However occasion shaft On-Off device too tight switch fitting doesnt sound like problem does However Bruce Underwood Lake Gunters ville AL reported engine vibration can cause shaft creep tight fitting thereby shutting off receiver recom mended drilling out fitting enough make sure shaft fits smoothly loosely Since time several other readers have written reported similar problems solutions Dont stop using Kwik Switch Mount use myself check tightness between On-Off shaft switch fitting take appropriate action back talking Radio Souths Tony Stillman 43 West Nine Mile Road Pensa cola FL 32514 said Hey going give Radio South hinges plug made smart remark back him about knowing about Radio South hinges already Later began wonder everyone really did know about Radio South hinges theres hinge thats much easier install Radio South hinge dont know about mark hinge go cut slot X-Acto #11 blade slide hinge put drop CyA adhesive Jet Hot Stuff Zap etc side hinge its Its hard wrong they stay John Fuqua Niceville FL FM flier finished top 20 last FAI team se lection finals Masters Tournament should get pald Radio South spokesman hinges John claims cannot destroy Ra dio South hinge Go talk dealer about hinges arent already familiar good way also just heard Radio South again performing repair/service JR radios Thats good news JR owners rely solely Circus Hobbies Circus repair depart ment periodically overloaded thing RC equipment owner cant tolerate waiting Tony told has less weeks back log work now crush frequency changes seems about over High Performance Models presents ECL IPSE Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed Specifically FAI Pattern Flying Perform Equally Well Other AMA Classes Plug Wings rglass Belly Pan Pre-Cut Holes Wing Joiner Tubes Ultrailght Honeycomb Wingcores extra $35 OptIonal Plastic Fiberglass Canopy Fiberglass Fuselage molded wing joIner tube HIGH PERFORMANCE MODELS 9556116 et North Delta British Columbia 6Z4 Canada 604-588-0605 Basic Kit- $12500 Pre-Built Kit- $32500 add SiSOOSaHI Send Check Money Order October 1988 53 DISTRIBUTED BY $975AVAILABLE AT AMERICAS8525 FINEST HOBBY SHOPS SMIITH ZIFDWDUZR87555 Sos Goboel Road cdes CA 53422 5 45E1717 NO MORE KICKBACKS THROWN PROPS popular best selling add ignition system world Convert engine spark ignition breokerless capacitive discharge Ignition System can installed engines 60 up both 2 & 4 stroke both single & twin cylinders 4strokers run absolutely beautiful ignition 10 30% power 4-stroke engine No kick-hock throwing props Absolutely no pre-detonetion tthe death 4-stroke engines Much lower priced feel usty hearings tcommercial fuel oveileble Red-Max Very low 900-1000 nap relieble idle end easy hand starts con control ignition timing yea will stop pre-detonatien engine will run muds cealer end develop power Now available completely shielded spark plug lead end 90 plug cover Chosen TLG Mfg & Byron Origiouls its outstanding reliability Send $100 price list newsletter ordering Box 1732 CH Electronics Inc Riveon WY 82501 307 857-6897 L
