THE CHALLENGER designed achieve glider would thermal well have good speed range high lift over drag ratio still docile enough easy handling beginner definite advantage competition accomplished especially turbulent windy conditions Clark Y airfoil selected after talking Bob Bienstein Paul Crowley about problems have RC sailplanes Bob mentioned fact AJ Smith won full-size Nationals few years back sailplane used Clark Y flaps sounded good selected airfoil designed years ago carrying heavy loads still maintaining high lift Dont afraid load up Challenger gets windy Dayton Ohio last year winds blowing 25 35 mph 27 ounces ballast performed beautifully bringing first place day mainly because its penetration stability rough conditions Remember want win competition have go down wind max-out Contest performance over past two years 14 first places 5 second places 3 third places 2 fourth places 1 fifth place 1973 ECSS Champion 1973 Nationals 3rd overall 1974 National Grand Cham pion 1974 Nationals best original design 1974 NSS Unlimited Class Champion 1974NSS Grand Champion Working level V LSF8-hour slope flight ac complished 2-hour 8-minute thermal flight also completed Construction Select wood carefully using light weight stockS-lb 6-lb balsa unless otherwise noted suggest use Tite bond glue throughout unless otherwise specified Follow construction sequence will have problems absolutely necessary constructing fuselage Wing Construction Splice together 1/16 sheet balsa /8 x ce spars /8 x a false leading edge alsa leading edge 1/16 plywood webbing 1/16 balsa webbing Make rib templates out 1/16 aluminum suitable material Cut 38 balsa rec tangles 1 x 10 long 1/16 sheet balsa sandwich between aluminum templates Use small screws long enough go through stack retain nut hold stack together Rough carve outline finish sanding templates Cut notches spars l file Make set ribs per half panel Using balsa rib #W-l template cut two ribs out /8 plywood Using balsa rib #W-2 W-3 W-4 W-5 templates cut two ribs out 1/16 plywood Cut out two 1/16 balsa W-28 ribs existing rib W-28 Cut two F-27 fuselage side plates out /x plywood time did drill holes F-27 now Using F-27s should spot glued together cut out s drilled together drill jig drill out holes plywood ribs W-1 through W-5 careful step very important best spot glue plywood ribs gether drill through simultaneously Notice holes line front spar Drill s wing ribs will assure exact alignment between wing fuselage Use 9/32 dia drill enlarge holes F-27 Start construction laying down wax paper over plans proceed fol lows Pin down lower 1/16 sheet balsa center 1/16 sheet balsa dihedral 1/16 sheet balsa Glue lower spruce spar sheeting drying pin down lower 1/16 sheet balsa trailing edge Glue lower 1/16 x 3/16 balsa cap strips lower angular /8 x ce spar Ribs #W-l through W-15 must notched out angular spar point sniffer tube holes also put Glue rib W- let dry Using web bing previously cut guide rib spac ing glue W-2 through W-38 glue webbing now Glue both W-28 ribs angle see section B-B make template set rib angle Note Cut out section ribs flap spars shown plans Glue 3/16 x t flap spar let dry Using 1/32 sheet balsa spacer between front flap spar rear flap spar glue rear flap spar rear ribs Glue 1/8 x ead ing edge should have bottom edge angled match upsweep ribs Using masking tape pull lower leading edge sheeting up contact ribs sub-leading edge tape Use Hot Stuff glue sheeting 8 Model Aviation Iiallcnge% ribs sub-leading edge Glue x spar angular x spar Rudder Cutout ribs R-l through R-15 R-21 out /4 sheet balsa spar stock 3/4 X II /2 pin down R-2l glue ribs R-l through R-15 1/16 x a brace balsa block 1/16 sheet balsa trailing edge Unpin add soft balsa blocks either end Sand shape bevel R-21 rudder movement shown section A-A MonoKote Vertical Stabilizer Cut out R-16 through R-20 F-25 F-26 F-26A see plans materials Spot glue R-20s soft balsa block shape shown side view section A-A including cut outs leading edge horn Remove R-20s cut contoured balsa block half accept fuselage former F-25 Glue Thermal sniffer removed show three servos middle servo flaps top servo elevator bottom R-20s F-25 insert horn rear servo rudder Nylon tube antenna 1200 mil pack shown will accommodate 1500 radio 3/32 ID brass tube horn epoxy Heathkit GD-lB 5-channel On-off switch over pack Below Thermal Sniffer position Glue half balsa block between two R-20s insert 3/32 ID brass tubing through horn epoxy eyelets R-20s retaining horn Glue F-26 F-26A F-26A previously glued F-26 R-20s Glue rib R-16 leading edge leading edge preshaped shown section A-A two piece R-19 R-18 R-17 /s balsa brace 1/8 balsa support Finally sheet both sides 1/16 balsa sand lightly MonoKote Fuselage Lay wax paper over plans pin down lower 3/16 spruce longerons pre-bend steaming longerons F-i F-2 formers should hang over front building board Use rubber bands hold together glueing F-I F-2 Ion gerons Make up wing tubing former assembly follows Sandwich front brass tubing between formers F-7 F-8 using F-8B F-8C spacers use epoxy Like wise sandwich rear brass tubing between formers F-b F-ll using F-hA F-I lB spacers Bend flap-drive wire shown solder 1/16 brass horn wire brass tubing horn put wire before bending shown plans Take tubing assemblies glue F-27s side along formers F-6 F-12 four s x /8 plywood braces shown plans Epoxy flap horn place along 1/8 plywood braces Glue assembly place onto lower longerons glue formers F-l through F-5 F-5A F-13 through F-24 glue both top 3/16 sq spruce longerons Make up pushrods put fuselage now cannot installed after fuselage complete unless use nyrodsdo recommend Unpin wing slide edge board use two 36 aluminum yardsticks buy local hardware approximately 50 washout trailing edge wing screw yardsticks building board Repin wing down board trailing edge over washout yardstiaks Epoxy brass wing tubes place add hardwood plywood balsa webbing webbing out rib W-9 epoxy W-l0 through W-36 Tite bond Add plywood front corner brace hardwood blocks eyescrews balsa fill-in between W-l W-2 December1975 9 Flap-spoiler function 40 degrees down flap gives full spoiler Rubber band pull spoiler down flap 20 degrees less Challenger sniffer tube Cut out ribs W-17 through W-21 spoiler glue 3/16 sq balsa spoiler Add balsa brace W-27 front flap spar Trim balsa false leading edge using razor-blade plane followed sanding final angular shape Next glue upper 1/16 balsa sheeting 1/16 balsa trailing edge 1/16 balsa flap top surface bevel edge shown plans Add 1/16 x 3/16 cap strips center 1/16 sheeting dihedral 1/16 sheeting 1/16 sheeting tween ribs W-18 W-19 Remove board dry trim front sheeting flush false lead ing edge Glue alsa leading edge add wing tip block carve sand final shape shown Sand entire wing cut flap loose cut wing tip add dihedral using /8 plywood braces shown Construct spoiler using 1/16 sheet balsa /8 sq balsa shown plans Super Monokote wing flap spoiler Epoxy load hinge wing root flap root Tape 1/32 sheet balsa bottom wing flap fold flap down onto sheet tape place Run piece Slicktack along hinge line untape remove 1/32 balsa Next bring flap neutral position flying position put tape end flap dihedral break hold flap align ment 1/32 spacing run piece Slicktack along bottom wing flap Using fine saw cut expansion slots shown front spar flap Add 005 brass bent around flap retain epoxy front 00-80 screws nuts Add aluminum drive-angle brackets flap root shown Add 1/16 plywood arm spoiler use epoxy Slicktack wing Epoxy 3/16 dia aluminum tubing spoiler string Cut slot top sheeting flap 1/16 plywood spoiler horn epoxy place Epoxy eyelets wing hold-ons Add small rubber band hooks spoiler wing epoxy shown Stabilizer Make rib templates out 1/16 aluminum Cut eleven balsa rectangles long 1/16 balsa sheet sandwich between aluminum templates using screws retain wing ribs Rough carve outline finish sanding match templates Cut notches leading edge spars trailing edge small file Make set ribs per half stab Using balsa rib S-l S-2 templates cut two ribs 1/16 plywood Glue balsa rib S-I ply wood rib S-I doubler Drill i/g dia holes brass tubing left panel 3/32 dia drill right ribs time taking care drill exact center dis tance Use aluminum horn drill guide aluminum horn should drilled 3/32 holes first back hole en larged i/8 dia front hole 5/32 dia Build both halves stab together Pin down lower /s x 3/16 spar glue ribs S-I through 5-11 Add 1/i x 3/16 top spar leading edge bottom trailing edge Add top trailing edge let dry Unpin side stab put 3/32 lD brass tubing left half stab along locking collar epoxy place yet also make sure have filed hole front tubing allow set screw clamp wire Next slide both 3/32 dia stab wires Slide 3/32 lD brass tube rear aluminum horn front 3/32 ID spacer tube front /8 ID brass tube slide aluminum horn over Next slide right half stab over 3/32 wires pin down Position 3/32 wires shown epoxy place right stab HG 01* PIANO WINE S SOLDER 17R 0 TUNING SECTION E-E N NOTE DO VOl INCREASE DIREDOAL-OJDDER UREA WOULD BE INSUFFICIENT AND GLIDER BILL BE UNSTARLE 7 Epoxy brass tubes locking collar left stab shown epoxy 3/32 ID brass tube rear hole horn time Epoxy /8 ID brass tube front horn shown Glue 1/16 sheet balsa webbing shown dry unpin add stab tip blocks Sand complete MonoKote Glue completed vertical stabilizer connect stab pushrod Add 1/16 sheet balsa fill-in shown plans lower upper longerons epoxy antenna nyrod Glue 3/16 sq balsa diagonals rear fuselage also LEVEL rLS GOD SCOPE FLIGHT COSTEST PERFORMANCE573 NI SI PLACES IIIZOO PLACE 143 PLACES 3OVERALL INTO NATL IRiSECRO GRAND CHAMPION IOTANSS GRAND CHAMPION 1974NSS OPEN CLASS CHAMPION 1974SOARISO NATO GRAND COANPIOS T 7 Jj MATT CONENEt0FT _ 11 COOPI ____ F K / SHIN MACGA PILL-IN MACGA PILPCI pCI TOP IREFP-RN HG CO 4 JML -NA GGARINSDONH LI-30 10 mASS Nlj IHDr PLO PRONRENSINGBRIG IIIGIDE IHALG Fl TO URING IDOANLE TAMING .OInP00TIIHNNGLSA OHIO SO GPRUCE GOPT BALSA- IHN PITBOO I ----- \l ROCK O*RRI -0 BALSAI l E LANBATE i~I-o~-. 01PIA II 4 5~DC B-,1011V II NOSE MACLAGIH4MOHG 0*0 BOG 440 SLING 5 RE 00 NOTEIP-ON PILL-IN ALL AREAS MAUlED BOOI N5mAHRILSAJj5TEORmJ HGPLOO 00GOJUSTARLE I7MNALSA SOKET PAl MODEL 1110W MISSIO PROENIO AR 10 Model Aviation Shows flap wing root Aluminum drive angle bracket slot Fuselage drive wire fits slot actuate flaps Also shows eyebolts retain wings fuselage 3/16 sheet balsa fill-in entire fuselage shown plans Glue /8 sheet balsa top fuselage Construct ballast box shown plans Remove top part fuselage glue bottom formers F-3A F-4A F-5B F-6A F-8A F-9 F-lOA F-12A F-13A Glue / x wood tow-hook re tainer blind nuts previously epoxied /8 sq longerons Next glue bal last boxes fill-in between formers 3/16 sheet balsa shown Glue soft balsa block up front nose block /8 plywood canopy retainer Spot glue canopy can either solid block laminated balsaalso 3/16 locating dowel rough carve shape sand entire fuselage Glue 1/32 plywood bottom surfaces indicated plans sand flush Cut loose previously spotglued canopy add radio gear hook up pushrods MonoKote fuselage ballast box door canopy Glue ood skid F-28 attach tow hook attach rudder hook up pushrod turn page Plans Challenger avail able through Model Aviation Plan Service large one-piece plan costing $800 available Otto Heithecker 2129 Parmenter Apt 3 Royal Oak Mich 48073 0584888 000080088058 50808 2024 11888 SO 8484 EcONAAX 88838 OCX 500 0 08488 0888 C XXII OS 885 CAPE AS 88013 50 * 8*8 XE //X F-OX ISWPLTFT88OPZ4I u&LSflESCON8RJOT8SJ 11/1X PLY 800 8 7 00 I3/3ZPLYFO5I III50AL84XIThfOII 18I788IXI L8AIS 82 PAR 808005088 0 XE IXXXE OP TXE w8-I EOIASA1___ L280001 P gRACEI8S8LSAj P88 8885 ~~SOFT XALS8 _______ IN 8*LP KIM SALc FOR 8850 / 53 84 8-148X IiN%IIflALNA841 818 SOILS COMPLETE 1801I/I6SALSA C05C8840 S ATTACO jjT II TO FUSE 008188 CONXT8 8-00/JiII/XIOLS&Z4f II8UL8A/ZXi~4 FILL-IN -8I8 8 &OCX ~jNAKX 04P28080 88088808888880 8884 38882 REOS888080* N80808488 00888 POSE AXE ECUCHA LLENGER 0040 1451/2 WINGAREA124000N WOIGHT 88 ONCES 80800DRAWN BY OTTO IIEITIICORER 48808INKED BY 800CR GREENEPLATE 80001 AVIATION 8 FE December 1975 11 Ballasit compartment divided sections located above forward tow hook Ballast compart mont door lies next fuselage Adjustable position tow hook also may seen flight winds up 35 mph author used 27 oz ballast pictures Bud Manning 18808 50500 31t80 SALSA TOPPOX ANT \ 48 880883/16 SO SP800E Challenger altitude hold onto glider until winch 10-degrees flap strong thermals builds up plenty pull heave Thats penetration raise flap negative 8Radio Installation Heathkit 5-chan- right heave Dont just let go degrees reflex position use little nel GD-19 used ship almost High Start use either bungie mini- down elevator until builds up speed radio will fit abun- mum 5/16 OD surgical tubingl/16 hold position maintain speed danceof room wall greater use 10-degrees flap also gives much greater LD Flying Check surfaces proper setting attempt use 20-degrees would expect Add ballast box alignment make sure free flap high starting will stall winds increase achieve penetration warps Add ballast nose until balances Challenger gentle very stable forgiving returning down-wind thermals CG position shown winch tows yet can very fast thermaling hope will enjoy Challenger use 20-degrees down flap maximum use 5-degrees flap weak thermals much have F47F -I 1 R WA 31L w F 4 --II \iV7341L1__ TITI_171W --- T-1421 B BALSA - W3S IB ID LOCKYS CALLER S1SSSeSiSSSSSSS-S52SI __LuzF-4 I S 2 414 -I -z7-~WZS\1\ W-22 W-25 TSP BREETIWS 0 3Ir IZ BALSA / _I IIA BALSA ISIl YSE AlA PlANS WIRE S-S W 27 ISnI -SS-A7 -- B B BII JL - WLIL JI 2 LIE PLY ISIl 12 Model Aviation ID Left Shows stab-rudder fillet slot rear stab wire rudder horn pushrod connection Above Stab halves wires intact half OO5 BRASS K R-ER __ A 3IOCAP STRIPSIBALSA -A_ 7—2zzzzi M-30 11] 7 IS- ~SPR ACE HK 1LiZi H WASNOUT-STARTS AT ROOT RIB 1R37 7Z1 -I -f RARBWOOO 7SS US AIBSSG TOB 5*5 F FE LGRITR IE \,eIrBA5A SOASOES IIC PLO OUCRON LINE3IG ALUM TUBING ALL OTOEB WEBBING IIR BALSA VERTICAL GSA B FILL INISIIBPLO PILL INI4IOPLACE BrSL CBTACB SECTION58RASS EAPRGSE PLACESJRREPLERIII LOAS CARRYING 6SLIEBTACK AR MABME50 TOW- TOPCOAT RINSE MARSjNNALAB ANGLE ASS 40 LANSISA SPA LSRIBS ANSEBIII ANGLE TO LEVEL FLAYS F SECTION C CBEESES SECTION 50 TSr BAA PUMP URE 4NEGS POBEGASE FROM JRES RRNNY CENTER AMOS WYOMING BEARROWN MIEN ORWA BIB TEMPLATE SIZES SNOWS ABE COMPENSATES FOR ANGLES OBTAINER WREN STUEB SUBBING-- SANSING OAT ANGLES BILL GIVE CORRECT MB SIZES ISTAB TEMPLATES CONE ALSO IWIMPI II PLY N I I iIIBPtYW-ETGRAN-SI L~SAW-jflR3WSJ [T77T N S E N PLATE 2 December1975 13 Launching Greater Soaring Hiking Soc field 2 hrs 8 mins Note 20 degrees down flap launch N-AS ---I j1J ZZ _ jrIz NIT K WLEL
Edition: Model Aviation - 1975/12
Page Numbers: 8, 9, 10, 11, 12, 13
THE CHALLENGER designed achieve glider would thermal well have good speed range high lift over drag ratio still docile enough easy handling beginner definite advantage competition accomplished especially turbulent windy conditions Clark Y airfoil selected after talking Bob Bienstein Paul Crowley about problems have RC sailplanes Bob mentioned fact AJ Smith won full-size Nationals few years back sailplane used Clark Y flaps sounded good selected airfoil designed years ago carrying heavy loads still maintaining high lift Dont afraid load up Challenger gets windy Dayton Ohio last year winds blowing 25 35 mph 27 ounces ballast performed beautifully bringing first place day mainly because its penetration stability rough conditions Remember want win competition have go down wind max-out Contest performance over past two years 14 first places 5 second places 3 third places 2 fourth places 1 fifth place 1973 ECSS Champion 1973 Nationals 3rd overall 1974 National Grand Cham pion 1974 Nationals best original design 1974 NSS Unlimited Class Champion 1974NSS Grand Champion Working level V LSF8-hour slope flight ac complished 2-hour 8-minute thermal flight also completed Construction Select wood carefully using light weight stockS-lb 6-lb balsa unless otherwise noted suggest use Tite bond glue throughout unless otherwise specified Follow construction sequence will have problems absolutely necessary constructing fuselage Wing Construction Splice together 1/16 sheet balsa /8 x ce spars /8 x a false leading edge alsa leading edge 1/16 plywood webbing 1/16 balsa webbing Make rib templates out 1/16 aluminum suitable material Cut 38 balsa rec tangles 1 x 10 long 1/16 sheet balsa sandwich between aluminum templates Use small screws long enough go through stack retain nut hold stack together Rough carve outline finish sanding templates Cut notches spars l file Make set ribs per half panel Using balsa rib #W-l template cut two ribs out /8 plywood Using balsa rib #W-2 W-3 W-4 W-5 templates cut two ribs out 1/16 plywood Cut out two 1/16 balsa W-28 ribs existing rib W-28 Cut two F-27 fuselage side plates out /x plywood time did drill holes F-27 now Using F-27s should spot glued together cut out s drilled together drill jig drill out holes plywood ribs W-1 through W-5 careful step very important best spot glue plywood ribs gether drill through simultaneously Notice holes line front spar Drill s wing ribs will assure exact alignment between wing fuselage Use 9/32 dia drill enlarge holes F-27 Start construction laying down wax paper over plans proceed fol lows Pin down lower 1/16 sheet balsa center 1/16 sheet balsa dihedral 1/16 sheet balsa Glue lower spruce spar sheeting drying pin down lower 1/16 sheet balsa trailing edge Glue lower 1/16 x 3/16 balsa cap strips lower angular /8 x ce spar Ribs #W-l through W-15 must notched out angular spar point sniffer tube holes also put Glue rib W- let dry Using web bing previously cut guide rib spac ing glue W-2 through W-38 glue webbing now Glue both W-28 ribs angle see section B-B make template set rib angle Note Cut out section ribs flap spars shown plans Glue 3/16 x t flap spar let dry Using 1/32 sheet balsa spacer between front flap spar rear flap spar glue rear flap spar rear ribs Glue 1/8 x ead ing edge should have bottom edge angled match upsweep ribs Using masking tape pull lower leading edge sheeting up contact ribs sub-leading edge tape Use Hot Stuff glue sheeting 8 Model Aviation Iiallcnge% ribs sub-leading edge Glue x spar angular x spar Rudder Cutout ribs R-l through R-15 R-21 out /4 sheet balsa spar stock 3/4 X II /2 pin down R-2l glue ribs R-l through R-15 1/16 x a brace balsa block 1/16 sheet balsa trailing edge Unpin add soft balsa blocks either end Sand shape bevel R-21 rudder movement shown section A-A MonoKote Vertical Stabilizer Cut out R-16 through R-20 F-25 F-26 F-26A see plans materials Spot glue R-20s soft balsa block shape shown side view section A-A including cut outs leading edge horn Remove R-20s cut contoured balsa block half accept fuselage former F-25 Glue Thermal sniffer removed show three servos middle servo flaps top servo elevator bottom R-20s F-25 insert horn rear servo rudder Nylon tube antenna 1200 mil pack shown will accommodate 1500 radio 3/32 ID brass tube horn epoxy Heathkit GD-lB 5-channel On-off switch over pack Below Thermal Sniffer position Glue half balsa block between two R-20s insert 3/32 ID brass tubing through horn epoxy eyelets R-20s retaining horn Glue F-26 F-26A F-26A previously glued F-26 R-20s Glue rib R-16 leading edge leading edge preshaped shown section A-A two piece R-19 R-18 R-17 /s balsa brace 1/8 balsa support Finally sheet both sides 1/16 balsa sand lightly MonoKote Fuselage Lay wax paper over plans pin down lower 3/16 spruce longerons pre-bend steaming longerons F-i F-2 formers should hang over front building board Use rubber bands hold together glueing F-I F-2 Ion gerons Make up wing tubing former assembly follows Sandwich front brass tubing between formers F-7 F-8 using F-8B F-8C spacers use epoxy Like wise sandwich rear brass tubing between formers F-b F-ll using F-hA F-I lB spacers Bend flap-drive wire shown solder 1/16 brass horn wire brass tubing horn put wire before bending shown plans Take tubing assemblies glue F-27s side along formers F-6 F-12 four s x /8 plywood braces shown plans Epoxy flap horn place along 1/8 plywood braces Glue assembly place onto lower longerons glue formers F-l through F-5 F-5A F-13 through F-24 glue both top 3/16 sq spruce longerons Make up pushrods put fuselage now cannot installed after fuselage complete unless use nyrodsdo recommend Unpin wing slide edge board use two 36 aluminum yardsticks buy local hardware approximately 50 washout trailing edge wing screw yardsticks building board Repin wing down board trailing edge over washout yardstiaks Epoxy brass wing tubes place add hardwood plywood balsa webbing webbing out rib W-9 epoxy W-l0 through W-36 Tite bond Add plywood front corner brace hardwood blocks eyescrews balsa fill-in between W-l W-2 December1975 9 Flap-spoiler function 40 degrees down flap gives full spoiler Rubber band pull spoiler down flap 20 degrees less Challenger sniffer tube Cut out ribs W-17 through W-21 spoiler glue 3/16 sq balsa spoiler Add balsa brace W-27 front flap spar Trim balsa false leading edge using razor-blade plane followed sanding final angular shape Next glue upper 1/16 balsa sheeting 1/16 balsa trailing edge 1/16 balsa flap top surface bevel edge shown plans Add 1/16 x 3/16 cap strips center 1/16 sheeting dihedral 1/16 sheeting 1/16 sheeting tween ribs W-18 W-19 Remove board dry trim front sheeting flush false lead ing edge Glue alsa leading edge add wing tip block carve sand final shape shown Sand entire wing cut flap loose cut wing tip add dihedral using /8 plywood braces shown Construct spoiler using 1/16 sheet balsa /8 sq balsa shown plans Super Monokote wing flap spoiler Epoxy load hinge wing root flap root Tape 1/32 sheet balsa bottom wing flap fold flap down onto sheet tape place Run piece Slicktack along hinge line untape remove 1/32 balsa Next bring flap neutral position flying position put tape end flap dihedral break hold flap align ment 1/32 spacing run piece Slicktack along bottom wing flap Using fine saw cut expansion slots shown front spar flap Add 005 brass bent around flap retain epoxy front 00-80 screws nuts Add aluminum drive-angle brackets flap root shown Add 1/16 plywood arm spoiler use epoxy Slicktack wing Epoxy 3/16 dia aluminum tubing spoiler string Cut slot top sheeting flap 1/16 plywood spoiler horn epoxy place Epoxy eyelets wing hold-ons Add small rubber band hooks spoiler wing epoxy shown Stabilizer Make rib templates out 1/16 aluminum Cut eleven balsa rectangles long 1/16 balsa sheet sandwich between aluminum templates using screws retain wing ribs Rough carve outline finish sanding match templates Cut notches leading edge spars trailing edge small file Make set ribs per half stab Using balsa rib S-l S-2 templates cut two ribs 1/16 plywood Glue balsa rib S-I ply wood rib S-I doubler Drill i/g dia holes brass tubing left panel 3/32 dia drill right ribs time taking care drill exact center dis tance Use aluminum horn drill guide aluminum horn should drilled 3/32 holes first back hole en larged i/8 dia front hole 5/32 dia Build both halves stab together Pin down lower /s x 3/16 spar glue ribs S-I through 5-11 Add 1/i x 3/16 top spar leading edge bottom trailing edge Add top trailing edge let dry Unpin side stab put 3/32 lD brass tubing left half stab along locking collar epoxy place yet also make sure have filed hole front tubing allow set screw clamp wire Next slide both 3/32 dia stab wires Slide 3/32 lD brass tube rear aluminum horn front 3/32 ID spacer tube front /8 ID brass tube slide aluminum horn over Next slide right half stab over 3/32 wires pin down Position 3/32 wires shown epoxy place right stab HG 01* PIANO WINE S SOLDER 17R 0 TUNING SECTION E-E N NOTE DO VOl INCREASE DIREDOAL-OJDDER UREA WOULD BE INSUFFICIENT AND GLIDER BILL BE UNSTARLE 7 Epoxy brass tubes locking collar left stab shown epoxy 3/32 ID brass tube rear hole horn time Epoxy /8 ID brass tube front horn shown Glue 1/16 sheet balsa webbing shown dry unpin add stab tip blocks Sand complete MonoKote Glue completed vertical stabilizer connect stab pushrod Add 1/16 sheet balsa fill-in shown plans lower upper longerons epoxy antenna nyrod Glue 3/16 sq balsa diagonals rear fuselage also LEVEL rLS GOD SCOPE FLIGHT COSTEST PERFORMANCE573 NI SI PLACES IIIZOO PLACE 143 PLACES 3OVERALL INTO NATL IRiSECRO GRAND CHAMPION IOTANSS GRAND CHAMPION 1974NSS OPEN CLASS CHAMPION 1974SOARISO NATO GRAND COANPIOS T 7 Jj MATT CONENEt0FT _ 11 COOPI ____ F K / SHIN MACGA PILL-IN MACGA PILPCI pCI TOP IREFP-RN HG CO 4 JML -NA GGARINSDONH LI-30 10 mASS Nlj IHDr PLO PRONRENSINGBRIG IIIGIDE IHALG Fl TO URING IDOANLE TAMING .OInP00TIIHNNGLSA OHIO SO GPRUCE GOPT BALSA- IHN PITBOO I ----- \l ROCK O*RRI -0 BALSAI l E LANBATE i~I-o~-. 01PIA II 4 5~DC B-,1011V II NOSE MACLAGIH4MOHG 0*0 BOG 440 SLING 5 RE 00 NOTEIP-ON PILL-IN ALL AREAS MAUlED BOOI N5mAHRILSAJj5TEORmJ HGPLOO 00GOJUSTARLE I7MNALSA SOKET PAl MODEL 1110W MISSIO PROENIO AR 10 Model Aviation Shows flap wing root Aluminum drive angle bracket slot Fuselage drive wire fits slot actuate flaps Also shows eyebolts retain wings fuselage 3/16 sheet balsa fill-in entire fuselage shown plans Glue /8 sheet balsa top fuselage Construct ballast box shown plans Remove top part fuselage glue bottom formers F-3A F-4A F-5B F-6A F-8A F-9 F-lOA F-12A F-13A Glue / x wood tow-hook re tainer blind nuts previously epoxied /8 sq longerons Next glue bal last boxes fill-in between formers 3/16 sheet balsa shown Glue soft balsa block up front nose block /8 plywood canopy retainer Spot glue canopy can either solid block laminated balsaalso 3/16 locating dowel rough carve shape sand entire fuselage Glue 1/32 plywood bottom surfaces indicated plans sand flush Cut loose previously spotglued canopy add radio gear hook up pushrods MonoKote fuselage ballast box door canopy Glue ood skid F-28 attach tow hook attach rudder hook up pushrod turn page Plans Challenger avail able through Model Aviation Plan Service large one-piece plan costing $800 available Otto Heithecker 2129 Parmenter Apt 3 Royal Oak Mich 48073 0584888 000080088058 50808 2024 11888 SO 8484 EcONAAX 88838 OCX 500 0 08488 0888 C XXII OS 885 CAPE AS 88013 50 * 8*8 XE //X F-OX ISWPLTFT88OPZ4I u&LSflESCON8RJOT8SJ 11/1X PLY 800 8 7 00 I3/3ZPLYFO5I III50AL84XIThfOII 18I788IXI L8AIS 82 PAR 808005088 0 XE IXXXE OP TXE w8-I EOIASA1___ L280001 P gRACEI8S8LSAj P88 8885 ~~SOFT XALS8 _______ IN 8*LP KIM SALc FOR 8850 / 53 84 8-148X IiN%IIflALNA841 818 SOILS COMPLETE 1801I/I6SALSA C05C8840 S ATTACO jjT II TO FUSE 008188 CONXT8 8-00/JiII/XIOLS&Z4f II8UL8A/ZXi~4 FILL-IN -8I8 8 &OCX ~jNAKX 04P28080 88088808888880 8884 38882 REOS888080* N80808488 00888 POSE AXE ECUCHA LLENGER 0040 1451/2 WINGAREA124000N WOIGHT 88 ONCES 80800DRAWN BY OTTO IIEITIICORER 48808INKED BY 800CR GREENEPLATE 80001 AVIATION 8 FE December 1975 11 Ballasit compartment divided sections located above forward tow hook Ballast compart mont door lies next fuselage Adjustable position tow hook also may seen flight winds up 35 mph author used 27 oz ballast pictures Bud Manning 18808 50500 31t80 SALSA TOPPOX ANT \ 48 880883/16 SO SP800E Challenger altitude hold onto glider until winch 10-degrees flap strong thermals builds up plenty pull heave Thats penetration raise flap negative 8Radio Installation Heathkit 5-chan- right heave Dont just let go degrees reflex position use little nel GD-19 used ship almost High Start use either bungie mini- down elevator until builds up speed radio will fit abun- mum 5/16 OD surgical tubingl/16 hold position maintain speed danceof room wall greater use 10-degrees flap also gives much greater LD Flying Check surfaces proper setting attempt use 20-degrees would expect Add ballast box alignment make sure free flap high starting will stall winds increase achieve penetration warps Add ballast nose until balances Challenger gentle very stable forgiving returning down-wind thermals CG position shown winch tows yet can very fast thermaling hope will enjoy Challenger use 20-degrees down flap maximum use 5-degrees flap weak thermals much have F47F -I 1 R WA 31L w F 4 --II \iV7341L1__ TITI_171W --- T-1421 B BALSA - W3S IB ID LOCKYS CALLER S1SSSeSiSSSSSSS-S52SI __LuzF-4 I S 2 414 -I -z7-~WZS\1\ W-22 W-25 TSP BREETIWS 0 3Ir IZ BALSA / _I IIA BALSA ISIl YSE AlA PlANS WIRE S-S W 27 ISnI -SS-A7 -- B B BII JL - WLIL JI 2 LIE PLY ISIl 12 Model Aviation ID Left Shows stab-rudder fillet slot rear stab wire rudder horn pushrod connection Above Stab halves wires intact half OO5 BRASS K R-ER __ A 3IOCAP STRIPSIBALSA -A_ 7—2zzzzi M-30 11] 7 IS- ~SPR ACE HK 1LiZi H WASNOUT-STARTS AT ROOT RIB 1R37 7Z1 -I -f RARBWOOO 7SS US AIBSSG TOB 5*5 F FE LGRITR IE \,eIrBA5A SOASOES IIC PLO OUCRON LINE3IG ALUM TUBING ALL OTOEB WEBBING IIR BALSA VERTICAL GSA B FILL INISIIBPLO PILL INI4IOPLACE BrSL CBTACB SECTION58RASS EAPRGSE PLACESJRREPLERIII LOAS CARRYING 6SLIEBTACK AR MABME50 TOW- TOPCOAT RINSE MARSjNNALAB ANGLE ASS 40 LANSISA SPA LSRIBS ANSEBIII ANGLE TO LEVEL FLAYS F SECTION C CBEESES SECTION 50 TSr BAA PUMP URE 4NEGS POBEGASE FROM JRES RRNNY CENTER AMOS WYOMING BEARROWN MIEN ORWA BIB TEMPLATE SIZES SNOWS ABE COMPENSATES FOR ANGLES OBTAINER WREN STUEB SUBBING-- SANSING OAT ANGLES BILL GIVE CORRECT MB SIZES ISTAB TEMPLATES CONE ALSO IWIMPI II PLY N I I iIIBPtYW-ETGRAN-SI L~SAW-jflR3WSJ [T77T N S E N PLATE 2 December1975 13 Launching Greater Soaring Hiking Soc field 2 hrs 8 mins Note 20 degrees down flap launch N-AS ---I j1J ZZ _ jrIz NIT K WLEL
Edition: Model Aviation - 1975/12
Page Numbers: 8, 9, 10, 11, 12, 13
THE CHALLENGER designed achieve glider would thermal well have good speed range high lift over drag ratio still docile enough easy handling beginner definite advantage competition accomplished especially turbulent windy conditions Clark Y airfoil selected after talking Bob Bienstein Paul Crowley about problems have RC sailplanes Bob mentioned fact AJ Smith won full-size Nationals few years back sailplane used Clark Y flaps sounded good selected airfoil designed years ago carrying heavy loads still maintaining high lift Dont afraid load up Challenger gets windy Dayton Ohio last year winds blowing 25 35 mph 27 ounces ballast performed beautifully bringing first place day mainly because its penetration stability rough conditions Remember want win competition have go down wind max-out Contest performance over past two years 14 first places 5 second places 3 third places 2 fourth places 1 fifth place 1973 ECSS Champion 1973 Nationals 3rd overall 1974 National Grand Cham pion 1974 Nationals best original design 1974 NSS Unlimited Class Champion 1974NSS Grand Champion Working level V LSF8-hour slope flight ac complished 2-hour 8-minute thermal flight also completed Construction Select wood carefully using light weight stockS-lb 6-lb balsa unless otherwise noted suggest use Tite bond glue throughout unless otherwise specified Follow construction sequence will have problems absolutely necessary constructing fuselage Wing Construction Splice together 1/16 sheet balsa /8 x ce spars /8 x a false leading edge alsa leading edge 1/16 plywood webbing 1/16 balsa webbing Make rib templates out 1/16 aluminum suitable material Cut 38 balsa rec tangles 1 x 10 long 1/16 sheet balsa sandwich between aluminum templates Use small screws long enough go through stack retain nut hold stack together Rough carve outline finish sanding templates Cut notches spars l file Make set ribs per half panel Using balsa rib #W-l template cut two ribs out /8 plywood Using balsa rib #W-2 W-3 W-4 W-5 templates cut two ribs out 1/16 plywood Cut out two 1/16 balsa W-28 ribs existing rib W-28 Cut two F-27 fuselage side plates out /x plywood time did drill holes F-27 now Using F-27s should spot glued together cut out s drilled together drill jig drill out holes plywood ribs W-1 through W-5 careful step very important best spot glue plywood ribs gether drill through simultaneously Notice holes line front spar Drill s wing ribs will assure exact alignment between wing fuselage Use 9/32 dia drill enlarge holes F-27 Start construction laying down wax paper over plans proceed fol lows Pin down lower 1/16 sheet balsa center 1/16 sheet balsa dihedral 1/16 sheet balsa Glue lower spruce spar sheeting drying pin down lower 1/16 sheet balsa trailing edge Glue lower 1/16 x 3/16 balsa cap strips lower angular /8 x ce spar Ribs #W-l through W-15 must notched out angular spar point sniffer tube holes also put Glue rib W- let dry Using web bing previously cut guide rib spac ing glue W-2 through W-38 glue webbing now Glue both W-28 ribs angle see section B-B make template set rib angle Note Cut out section ribs flap spars shown plans Glue 3/16 x t flap spar let dry Using 1/32 sheet balsa spacer between front flap spar rear flap spar glue rear flap spar rear ribs Glue 1/8 x ead ing edge should have bottom edge angled match upsweep ribs Using masking tape pull lower leading edge sheeting up contact ribs sub-leading edge tape Use Hot Stuff glue sheeting 8 Model Aviation Iiallcnge% ribs sub-leading edge Glue x spar angular x spar Rudder Cutout ribs R-l through R-15 R-21 out /4 sheet balsa spar stock 3/4 X II /2 pin down R-2l glue ribs R-l through R-15 1/16 x a brace balsa block 1/16 sheet balsa trailing edge Unpin add soft balsa blocks either end Sand shape bevel R-21 rudder movement shown section A-A MonoKote Vertical Stabilizer Cut out R-16 through R-20 F-25 F-26 F-26A see plans materials Spot glue R-20s soft balsa block shape shown side view section A-A including cut outs leading edge horn Remove R-20s cut contoured balsa block half accept fuselage former F-25 Glue Thermal sniffer removed show three servos middle servo flaps top servo elevator bottom R-20s F-25 insert horn rear servo rudder Nylon tube antenna 1200 mil pack shown will accommodate 1500 radio 3/32 ID brass tube horn epoxy Heathkit GD-lB 5-channel On-off switch over pack Below Thermal Sniffer position Glue half balsa block between two R-20s insert 3/32 ID brass tubing through horn epoxy eyelets R-20s retaining horn Glue F-26 F-26A F-26A previously glued F-26 R-20s Glue rib R-16 leading edge leading edge preshaped shown section A-A two piece R-19 R-18 R-17 /s balsa brace 1/8 balsa support Finally sheet both sides 1/16 balsa sand lightly MonoKote Fuselage Lay wax paper over plans pin down lower 3/16 spruce longerons pre-bend steaming longerons F-i F-2 formers should hang over front building board Use rubber bands hold together glueing F-I F-2 Ion gerons Make up wing tubing former assembly follows Sandwich front brass tubing between formers F-7 F-8 using F-8B F-8C spacers use epoxy Like wise sandwich rear brass tubing between formers F-b F-ll using F-hA F-I lB spacers Bend flap-drive wire shown solder 1/16 brass horn wire brass tubing horn put wire before bending shown plans Take tubing assemblies glue F-27s side along formers F-6 F-12 four s x /8 plywood braces shown plans Epoxy flap horn place along 1/8 plywood braces Glue assembly place onto lower longerons glue formers F-l through F-5 F-5A F-13 through F-24 glue both top 3/16 sq spruce longerons Make up pushrods put fuselage now cannot installed after fuselage complete unless use nyrodsdo recommend Unpin wing slide edge board use two 36 aluminum yardsticks buy local hardware approximately 50 washout trailing edge wing screw yardsticks building board Repin wing down board trailing edge over washout yardstiaks Epoxy brass wing tubes place add hardwood plywood balsa webbing webbing out rib W-9 epoxy W-l0 through W-36 Tite bond Add plywood front corner brace hardwood blocks eyescrews balsa fill-in between W-l W-2 December1975 9 Flap-spoiler function 40 degrees down flap gives full spoiler Rubber band pull spoiler down flap 20 degrees less Challenger sniffer tube Cut out ribs W-17 through W-21 spoiler glue 3/16 sq balsa spoiler Add balsa brace W-27 front flap spar Trim balsa false leading edge using razor-blade plane followed sanding final angular shape Next glue upper 1/16 balsa sheeting 1/16 balsa trailing edge 1/16 balsa flap top surface bevel edge shown plans Add 1/16 x 3/16 cap strips center 1/16 sheeting dihedral 1/16 sheeting 1/16 sheeting tween ribs W-18 W-19 Remove board dry trim front sheeting flush false lead ing edge Glue alsa leading edge add wing tip block carve sand final shape shown Sand entire wing cut flap loose cut wing tip add dihedral using /8 plywood braces shown Construct spoiler using 1/16 sheet balsa /8 sq balsa shown plans Super Monokote wing flap spoiler Epoxy load hinge wing root flap root Tape 1/32 sheet balsa bottom wing flap fold flap down onto sheet tape place Run piece Slicktack along hinge line untape remove 1/32 balsa Next bring flap neutral position flying position put tape end flap dihedral break hold flap align ment 1/32 spacing run piece Slicktack along bottom wing flap Using fine saw cut expansion slots shown front spar flap Add 005 brass bent around flap retain epoxy front 00-80 screws nuts Add aluminum drive-angle brackets flap root shown Add 1/16 plywood arm spoiler use epoxy Slicktack wing Epoxy 3/16 dia aluminum tubing spoiler string Cut slot top sheeting flap 1/16 plywood spoiler horn epoxy place Epoxy eyelets wing hold-ons Add small rubber band hooks spoiler wing epoxy shown Stabilizer Make rib templates out 1/16 aluminum Cut eleven balsa rectangles long 1/16 balsa sheet sandwich between aluminum templates using screws retain wing ribs Rough carve outline finish sanding match templates Cut notches leading edge spars trailing edge small file Make set ribs per half stab Using balsa rib S-l S-2 templates cut two ribs 1/16 plywood Glue balsa rib S-I ply wood rib S-I doubler Drill i/g dia holes brass tubing left panel 3/32 dia drill right ribs time taking care drill exact center dis tance Use aluminum horn drill guide aluminum horn should drilled 3/32 holes first back hole en larged i/8 dia front hole 5/32 dia Build both halves stab together Pin down lower /s x 3/16 spar glue ribs S-I through 5-11 Add 1/i x 3/16 top spar leading edge bottom trailing edge Add top trailing edge let dry Unpin side stab put 3/32 lD brass tubing left half stab along locking collar epoxy place yet also make sure have filed hole front tubing allow set screw clamp wire Next slide both 3/32 dia stab wires Slide 3/32 lD brass tube rear aluminum horn front 3/32 ID spacer tube front /8 ID brass tube slide aluminum horn over Next slide right half stab over 3/32 wires pin down Position 3/32 wires shown epoxy place right stab HG 01* PIANO WINE S SOLDER 17R 0 TUNING SECTION E-E N NOTE DO VOl INCREASE DIREDOAL-OJDDER UREA WOULD BE INSUFFICIENT AND GLIDER BILL BE UNSTARLE 7 Epoxy brass tubes locking collar left stab shown epoxy 3/32 ID brass tube rear hole horn time Epoxy /8 ID brass tube front horn shown Glue 1/16 sheet balsa webbing shown dry unpin add stab tip blocks Sand complete MonoKote Glue completed vertical stabilizer connect stab pushrod Add 1/16 sheet balsa fill-in shown plans lower upper longerons epoxy antenna nyrod Glue 3/16 sq balsa diagonals rear fuselage also LEVEL rLS GOD SCOPE FLIGHT COSTEST PERFORMANCE573 NI SI PLACES IIIZOO PLACE 143 PLACES 3OVERALL INTO NATL IRiSECRO GRAND CHAMPION IOTANSS GRAND CHAMPION 1974NSS OPEN CLASS CHAMPION 1974SOARISO NATO GRAND COANPIOS T 7 Jj MATT CONENEt0FT _ 11 COOPI ____ F K / SHIN MACGA PILL-IN MACGA PILPCI pCI TOP IREFP-RN HG CO 4 JML -NA GGARINSDONH LI-30 10 mASS Nlj IHDr PLO PRONRENSINGBRIG IIIGIDE IHALG Fl TO URING IDOANLE TAMING .OInP00TIIHNNGLSA OHIO SO GPRUCE GOPT BALSA- IHN PITBOO I ----- \l ROCK O*RRI -0 BALSAI l E LANBATE i~I-o~-. 01PIA II 4 5~DC B-,1011V II NOSE MACLAGIH4MOHG 0*0 BOG 440 SLING 5 RE 00 NOTEIP-ON PILL-IN ALL AREAS MAUlED BOOI N5mAHRILSAJj5TEORmJ HGPLOO 00GOJUSTARLE I7MNALSA SOKET PAl MODEL 1110W MISSIO PROENIO AR 10 Model Aviation Shows flap wing root Aluminum drive angle bracket slot Fuselage drive wire fits slot actuate flaps Also shows eyebolts retain wings fuselage 3/16 sheet balsa fill-in entire fuselage shown plans Glue /8 sheet balsa top fuselage Construct ballast box shown plans Remove top part fuselage glue bottom formers F-3A F-4A F-5B F-6A F-8A F-9 F-lOA F-12A F-13A Glue / x wood tow-hook re tainer blind nuts previously epoxied /8 sq longerons Next glue bal last boxes fill-in between formers 3/16 sheet balsa shown Glue soft balsa block up front nose block /8 plywood canopy retainer Spot glue canopy can either solid block laminated balsaalso 3/16 locating dowel rough carve shape sand entire fuselage Glue 1/32 plywood bottom surfaces indicated plans sand flush Cut loose previously spotglued canopy add radio gear hook up pushrods MonoKote fuselage ballast box door canopy Glue ood skid F-28 attach tow hook attach rudder hook up pushrod turn page Plans Challenger avail able through Model Aviation Plan Service large one-piece plan costing $800 available Otto Heithecker 2129 Parmenter Apt 3 Royal Oak Mich 48073 0584888 000080088058 50808 2024 11888 SO 8484 EcONAAX 88838 OCX 500 0 08488 0888 C XXII OS 885 CAPE AS 88013 50 * 8*8 XE //X F-OX ISWPLTFT88OPZ4I u&LSflESCON8RJOT8SJ 11/1X PLY 800 8 7 00 I3/3ZPLYFO5I III50AL84XIThfOII 18I788IXI L8AIS 82 PAR 808005088 0 XE IXXXE OP TXE w8-I EOIASA1___ L280001 P gRACEI8S8LSAj P88 8885 ~~SOFT XALS8 _______ IN 8*LP KIM SALc FOR 8850 / 53 84 8-148X IiN%IIflALNA841 818 SOILS COMPLETE 1801I/I6SALSA C05C8840 S ATTACO jjT II TO FUSE 008188 CONXT8 8-00/JiII/XIOLS&Z4f II8UL8A/ZXi~4 FILL-IN -8I8 8 &OCX ~jNAKX 04P28080 88088808888880 8884 38882 REOS888080* N80808488 00888 POSE AXE ECUCHA LLENGER 0040 1451/2 WINGAREA124000N WOIGHT 88 ONCES 80800DRAWN BY OTTO IIEITIICORER 48808INKED BY 800CR GREENEPLATE 80001 AVIATION 8 FE December 1975 11 Ballasit compartment divided sections located above forward tow hook Ballast compart mont door lies next fuselage Adjustable position tow hook also may seen flight winds up 35 mph author used 27 oz ballast pictures Bud Manning 18808 50500 31t80 SALSA TOPPOX ANT \ 48 880883/16 SO SP800E Challenger altitude hold onto glider until winch 10-degrees flap strong thermals builds up plenty pull heave Thats penetration raise flap negative 8Radio Installation Heathkit 5-chan- right heave Dont just let go degrees reflex position use little nel GD-19 used ship almost High Start use either bungie mini- down elevator until builds up speed radio will fit abun- mum 5/16 OD surgical tubingl/16 hold position maintain speed danceof room wall greater use 10-degrees flap also gives much greater LD Flying Check surfaces proper setting attempt use 20-degrees would expect Add ballast box alignment make sure free flap high starting will stall winds increase achieve penetration warps Add ballast nose until balances Challenger gentle very stable forgiving returning down-wind thermals CG position shown winch tows yet can very fast thermaling hope will enjoy Challenger use 20-degrees down flap maximum use 5-degrees flap weak thermals much have F47F -I 1 R WA 31L w F 4 --II \iV7341L1__ TITI_171W --- T-1421 B BALSA - W3S IB ID LOCKYS CALLER S1SSSeSiSSSSSSS-S52SI __LuzF-4 I S 2 414 -I -z7-~WZS\1\ W-22 W-25 TSP BREETIWS 0 3Ir IZ BALSA / _I IIA BALSA ISIl YSE AlA PlANS WIRE S-S W 27 ISnI -SS-A7 -- B B BII JL - WLIL JI 2 LIE PLY ISIl 12 Model Aviation ID Left Shows stab-rudder fillet slot rear stab wire rudder horn pushrod connection Above Stab halves wires intact half OO5 BRASS K R-ER __ A 3IOCAP STRIPSIBALSA -A_ 7—2zzzzi M-30 11] 7 IS- ~SPR ACE HK 1LiZi H WASNOUT-STARTS AT ROOT RIB 1R37 7Z1 -I -f RARBWOOO 7SS US AIBSSG TOB 5*5 F FE LGRITR IE \,eIrBA5A SOASOES IIC PLO OUCRON LINE3IG ALUM TUBING ALL OTOEB WEBBING IIR BALSA VERTICAL GSA B FILL INISIIBPLO PILL INI4IOPLACE BrSL CBTACB SECTION58RASS EAPRGSE PLACESJRREPLERIII LOAS CARRYING 6SLIEBTACK AR MABME50 TOW- TOPCOAT RINSE MARSjNNALAB ANGLE ASS 40 LANSISA SPA LSRIBS ANSEBIII ANGLE TO LEVEL FLAYS F SECTION C CBEESES SECTION 50 TSr BAA PUMP URE 4NEGS POBEGASE FROM JRES RRNNY CENTER AMOS WYOMING BEARROWN MIEN ORWA BIB TEMPLATE SIZES SNOWS ABE COMPENSATES FOR ANGLES OBTAINER WREN STUEB SUBBING-- SANSING OAT ANGLES BILL GIVE CORRECT MB SIZES ISTAB TEMPLATES CONE ALSO IWIMPI II PLY N I I iIIBPtYW-ETGRAN-SI L~SAW-jflR3WSJ [T77T N S E N PLATE 2 December1975 13 Launching Greater Soaring Hiking Soc field 2 hrs 8 mins Note 20 degrees down flap launch N-AS ---I j1J ZZ _ jrIz NIT K WLEL
Edition: Model Aviation - 1975/12
Page Numbers: 8, 9, 10, 11, 12, 13
THE CHALLENGER designed achieve glider would thermal well have good speed range high lift over drag ratio still docile enough easy handling beginner definite advantage competition accomplished especially turbulent windy conditions Clark Y airfoil selected after talking Bob Bienstein Paul Crowley about problems have RC sailplanes Bob mentioned fact AJ Smith won full-size Nationals few years back sailplane used Clark Y flaps sounded good selected airfoil designed years ago carrying heavy loads still maintaining high lift Dont afraid load up Challenger gets windy Dayton Ohio last year winds blowing 25 35 mph 27 ounces ballast performed beautifully bringing first place day mainly because its penetration stability rough conditions Remember want win competition have go down wind max-out Contest performance over past two years 14 first places 5 second places 3 third places 2 fourth places 1 fifth place 1973 ECSS Champion 1973 Nationals 3rd overall 1974 National Grand Cham pion 1974 Nationals best original design 1974 NSS Unlimited Class Champion 1974NSS Grand Champion Working level V LSF8-hour slope flight ac complished 2-hour 8-minute thermal flight also completed Construction Select wood carefully using light weight stockS-lb 6-lb balsa unless otherwise noted suggest use Tite bond glue throughout unless otherwise specified Follow construction sequence will have problems absolutely necessary constructing fuselage Wing Construction Splice together 1/16 sheet balsa /8 x ce spars /8 x a false leading edge alsa leading edge 1/16 plywood webbing 1/16 balsa webbing Make rib templates out 1/16 aluminum suitable material Cut 38 balsa rec tangles 1 x 10 long 1/16 sheet balsa sandwich between aluminum templates Use small screws long enough go through stack retain nut hold stack together Rough carve outline finish sanding templates Cut notches spars l file Make set ribs per half panel Using balsa rib #W-l template cut two ribs out /8 plywood Using balsa rib #W-2 W-3 W-4 W-5 templates cut two ribs out 1/16 plywood Cut out two 1/16 balsa W-28 ribs existing rib W-28 Cut two F-27 fuselage side plates out /x plywood time did drill holes F-27 now Using F-27s should spot glued together cut out s drilled together drill jig drill out holes plywood ribs W-1 through W-5 careful step very important best spot glue plywood ribs gether drill through simultaneously Notice holes line front spar Drill s wing ribs will assure exact alignment between wing fuselage Use 9/32 dia drill enlarge holes F-27 Start construction laying down wax paper over plans proceed fol lows Pin down lower 1/16 sheet balsa center 1/16 sheet balsa dihedral 1/16 sheet balsa Glue lower spruce spar sheeting drying pin down lower 1/16 sheet balsa trailing edge Glue lower 1/16 x 3/16 balsa cap strips lower angular /8 x ce spar Ribs #W-l through W-15 must notched out angular spar point sniffer tube holes also put Glue rib W- let dry Using web bing previously cut guide rib spac ing glue W-2 through W-38 glue webbing now Glue both W-28 ribs angle see section B-B make template set rib angle Note Cut out section ribs flap spars shown plans Glue 3/16 x t flap spar let dry Using 1/32 sheet balsa spacer between front flap spar rear flap spar glue rear flap spar rear ribs Glue 1/8 x ead ing edge should have bottom edge angled match upsweep ribs Using masking tape pull lower leading edge sheeting up contact ribs sub-leading edge tape Use Hot Stuff glue sheeting 8 Model Aviation Iiallcnge% ribs sub-leading edge Glue x spar angular x spar Rudder Cutout ribs R-l through R-15 R-21 out /4 sheet balsa spar stock 3/4 X II /2 pin down R-2l glue ribs R-l through R-15 1/16 x a brace balsa block 1/16 sheet balsa trailing edge Unpin add soft balsa blocks either end Sand shape bevel R-21 rudder movement shown section A-A MonoKote Vertical Stabilizer Cut out R-16 through R-20 F-25 F-26 F-26A see plans materials Spot glue R-20s soft balsa block shape shown side view section A-A including cut outs leading edge horn Remove R-20s cut contoured balsa block half accept fuselage former F-25 Glue Thermal sniffer removed show three servos middle servo flaps top servo elevator bottom R-20s F-25 insert horn rear servo rudder Nylon tube antenna 1200 mil pack shown will accommodate 1500 radio 3/32 ID brass tube horn epoxy Heathkit GD-lB 5-channel On-off switch over pack Below Thermal Sniffer position Glue half balsa block between two R-20s insert 3/32 ID brass tubing through horn epoxy eyelets R-20s retaining horn Glue F-26 F-26A F-26A previously glued F-26 R-20s Glue rib R-16 leading edge leading edge preshaped shown section A-A two piece R-19 R-18 R-17 /s balsa brace 1/8 balsa support Finally sheet both sides 1/16 balsa sand lightly MonoKote Fuselage Lay wax paper over plans pin down lower 3/16 spruce longerons pre-bend steaming longerons F-i F-2 formers should hang over front building board Use rubber bands hold together glueing F-I F-2 Ion gerons Make up wing tubing former assembly follows Sandwich front brass tubing between formers F-7 F-8 using F-8B F-8C spacers use epoxy Like wise sandwich rear brass tubing between formers F-b F-ll using F-hA F-I lB spacers Bend flap-drive wire shown solder 1/16 brass horn wire brass tubing horn put wire before bending shown plans Take tubing assemblies glue F-27s side along formers F-6 F-12 four s x /8 plywood braces shown plans Epoxy flap horn place along 1/8 plywood braces Glue assembly place onto lower longerons glue formers F-l through F-5 F-5A F-13 through F-24 glue both top 3/16 sq spruce longerons Make up pushrods put fuselage now cannot installed after fuselage complete unless use nyrodsdo recommend Unpin wing slide edge board use two 36 aluminum yardsticks buy local hardware approximately 50 washout trailing edge wing screw yardsticks building board Repin wing down board trailing edge over washout yardstiaks Epoxy brass wing tubes place add hardwood plywood balsa webbing webbing out rib W-9 epoxy W-l0 through W-36 Tite bond Add plywood front corner brace hardwood blocks eyescrews balsa fill-in between W-l W-2 December1975 9 Flap-spoiler function 40 degrees down flap gives full spoiler Rubber band pull spoiler down flap 20 degrees less Challenger sniffer tube Cut out ribs W-17 through W-21 spoiler glue 3/16 sq balsa spoiler Add balsa brace W-27 front flap spar Trim balsa false leading edge using razor-blade plane followed sanding final angular shape Next glue upper 1/16 balsa sheeting 1/16 balsa trailing edge 1/16 balsa flap top surface bevel edge shown plans Add 1/16 x 3/16 cap strips center 1/16 sheeting dihedral 1/16 sheeting 1/16 sheeting tween ribs W-18 W-19 Remove board dry trim front sheeting flush false lead ing edge Glue alsa leading edge add wing tip block carve sand final shape shown Sand entire wing cut flap loose cut wing tip add dihedral using /8 plywood braces shown Construct spoiler using 1/16 sheet balsa /8 sq balsa shown plans Super Monokote wing flap spoiler Epoxy load hinge wing root flap root Tape 1/32 sheet balsa bottom wing flap fold flap down onto sheet tape place Run piece Slicktack along hinge line untape remove 1/32 balsa Next bring flap neutral position flying position put tape end flap dihedral break hold flap align ment 1/32 spacing run piece Slicktack along bottom wing flap Using fine saw cut expansion slots shown front spar flap Add 005 brass bent around flap retain epoxy front 00-80 screws nuts Add aluminum drive-angle brackets flap root shown Add 1/16 plywood arm spoiler use epoxy Slicktack wing Epoxy 3/16 dia aluminum tubing spoiler string Cut slot top sheeting flap 1/16 plywood spoiler horn epoxy place Epoxy eyelets wing hold-ons Add small rubber band hooks spoiler wing epoxy shown Stabilizer Make rib templates out 1/16 aluminum Cut eleven balsa rectangles long 1/16 balsa sheet sandwich between aluminum templates using screws retain wing ribs Rough carve outline finish sanding match templates Cut notches leading edge spars trailing edge small file Make set ribs per half stab Using balsa rib S-l S-2 templates cut two ribs 1/16 plywood Glue balsa rib S-I ply wood rib S-I doubler Drill i/g dia holes brass tubing left panel 3/32 dia drill right ribs time taking care drill exact center dis tance Use aluminum horn drill guide aluminum horn should drilled 3/32 holes first back hole en larged i/8 dia front hole 5/32 dia Build both halves stab together Pin down lower /s x 3/16 spar glue ribs S-I through 5-11 Add 1/i x 3/16 top spar leading edge bottom trailing edge Add top trailing edge let dry Unpin side stab put 3/32 lD brass tubing left half stab along locking collar epoxy place yet also make sure have filed hole front tubing allow set screw clamp wire Next slide both 3/32 dia stab wires Slide 3/32 lD brass tube rear aluminum horn front 3/32 ID spacer tube front /8 ID brass tube slide aluminum horn over Next slide right half stab over 3/32 wires pin down Position 3/32 wires shown epoxy place right stab HG 01* PIANO WINE S SOLDER 17R 0 TUNING SECTION E-E N NOTE DO VOl INCREASE DIREDOAL-OJDDER UREA WOULD BE INSUFFICIENT AND GLIDER BILL BE UNSTARLE 7 Epoxy brass tubes locking collar left stab shown epoxy 3/32 ID brass tube rear hole horn time Epoxy /8 ID brass tube front horn shown Glue 1/16 sheet balsa webbing shown dry unpin add stab tip blocks Sand complete MonoKote Glue completed vertical stabilizer connect stab pushrod Add 1/16 sheet balsa fill-in shown plans lower upper longerons epoxy antenna nyrod Glue 3/16 sq balsa diagonals rear fuselage also LEVEL rLS GOD SCOPE FLIGHT COSTEST PERFORMANCE573 NI SI PLACES IIIZOO PLACE 143 PLACES 3OVERALL INTO NATL IRiSECRO GRAND CHAMPION IOTANSS GRAND CHAMPION 1974NSS OPEN CLASS CHAMPION 1974SOARISO NATO GRAND COANPIOS T 7 Jj MATT CONENEt0FT _ 11 COOPI ____ F K / SHIN MACGA PILL-IN MACGA PILPCI pCI TOP IREFP-RN HG CO 4 JML -NA GGARINSDONH LI-30 10 mASS Nlj IHDr PLO PRONRENSINGBRIG IIIGIDE IHALG Fl TO URING IDOANLE TAMING .OInP00TIIHNNGLSA OHIO SO GPRUCE GOPT BALSA- IHN PITBOO I ----- \l ROCK O*RRI -0 BALSAI l E LANBATE i~I-o~-. 01PIA II 4 5~DC B-,1011V II NOSE MACLAGIH4MOHG 0*0 BOG 440 SLING 5 RE 00 NOTEIP-ON PILL-IN ALL AREAS MAUlED BOOI N5mAHRILSAJj5TEORmJ HGPLOO 00GOJUSTARLE I7MNALSA SOKET PAl MODEL 1110W MISSIO PROENIO AR 10 Model Aviation Shows flap wing root Aluminum drive angle bracket slot Fuselage drive wire fits slot actuate flaps Also shows eyebolts retain wings fuselage 3/16 sheet balsa fill-in entire fuselage shown plans Glue /8 sheet balsa top fuselage Construct ballast box shown plans Remove top part fuselage glue bottom formers F-3A F-4A F-5B F-6A F-8A F-9 F-lOA F-12A F-13A Glue / x wood tow-hook re tainer blind nuts previously epoxied /8 sq longerons Next glue bal last boxes fill-in between formers 3/16 sheet balsa shown Glue soft balsa block up front nose block /8 plywood canopy retainer Spot glue canopy can either solid block laminated balsaalso 3/16 locating dowel rough carve shape sand entire fuselage Glue 1/32 plywood bottom surfaces indicated plans sand flush Cut loose previously spotglued canopy add radio gear hook up pushrods MonoKote fuselage ballast box door canopy Glue ood skid F-28 attach tow hook attach rudder hook up pushrod turn page Plans Challenger avail able through Model Aviation Plan Service large one-piece plan costing $800 available Otto Heithecker 2129 Parmenter Apt 3 Royal Oak Mich 48073 0584888 000080088058 50808 2024 11888 SO 8484 EcONAAX 88838 OCX 500 0 08488 0888 C XXII OS 885 CAPE AS 88013 50 * 8*8 XE //X F-OX ISWPLTFT88OPZ4I u&LSflESCON8RJOT8SJ 11/1X PLY 800 8 7 00 I3/3ZPLYFO5I III50AL84XIThfOII 18I788IXI L8AIS 82 PAR 808005088 0 XE IXXXE OP TXE w8-I EOIASA1___ L280001 P gRACEI8S8LSAj P88 8885 ~~SOFT XALS8 _______ IN 8*LP KIM SALc FOR 8850 / 53 84 8-148X IiN%IIflALNA841 818 SOILS COMPLETE 1801I/I6SALSA C05C8840 S ATTACO jjT II TO FUSE 008188 CONXT8 8-00/JiII/XIOLS&Z4f II8UL8A/ZXi~4 FILL-IN -8I8 8 &OCX ~jNAKX 04P28080 88088808888880 8884 38882 REOS888080* N80808488 00888 POSE AXE ECUCHA LLENGER 0040 1451/2 WINGAREA124000N WOIGHT 88 ONCES 80800DRAWN BY OTTO IIEITIICORER 48808INKED BY 800CR GREENEPLATE 80001 AVIATION 8 FE December 1975 11 Ballasit compartment divided sections located above forward tow hook Ballast compart mont door lies next fuselage Adjustable position tow hook also may seen flight winds up 35 mph author used 27 oz ballast pictures Bud Manning 18808 50500 31t80 SALSA TOPPOX ANT \ 48 880883/16 SO SP800E Challenger altitude hold onto glider until winch 10-degrees flap strong thermals builds up plenty pull heave Thats penetration raise flap negative 8Radio Installation Heathkit 5-chan- right heave Dont just let go degrees reflex position use little nel GD-19 used ship almost High Start use either bungie mini- down elevator until builds up speed radio will fit abun- mum 5/16 OD surgical tubingl/16 hold position maintain speed danceof room wall greater use 10-degrees flap also gives much greater LD Flying Check surfaces proper setting attempt use 20-degrees would expect Add ballast box alignment make sure free flap high starting will stall winds increase achieve penetration warps Add ballast nose until balances Challenger gentle very stable forgiving returning down-wind thermals CG position shown winch tows yet can very fast thermaling hope will enjoy Challenger use 20-degrees down flap maximum use 5-degrees flap weak thermals much have F47F -I 1 R WA 31L w F 4 --II \iV7341L1__ TITI_171W --- T-1421 B BALSA - W3S IB ID LOCKYS CALLER S1SSSeSiSSSSSSS-S52SI __LuzF-4 I S 2 414 -I -z7-~WZS\1\ W-22 W-25 TSP BREETIWS 0 3Ir IZ BALSA / _I IIA BALSA ISIl YSE AlA PlANS WIRE S-S W 27 ISnI -SS-A7 -- B B BII JL - WLIL JI 2 LIE PLY ISIl 12 Model Aviation ID Left Shows stab-rudder fillet slot rear stab wire rudder horn pushrod connection Above Stab halves wires intact half OO5 BRASS K R-ER __ A 3IOCAP STRIPSIBALSA -A_ 7—2zzzzi M-30 11] 7 IS- ~SPR ACE HK 1LiZi H WASNOUT-STARTS AT ROOT RIB 1R37 7Z1 -I -f RARBWOOO 7SS US AIBSSG TOB 5*5 F FE LGRITR IE \,eIrBA5A SOASOES IIC PLO OUCRON LINE3IG ALUM TUBING ALL OTOEB WEBBING IIR BALSA VERTICAL GSA B FILL INISIIBPLO PILL INI4IOPLACE BrSL CBTACB SECTION58RASS EAPRGSE PLACESJRREPLERIII LOAS CARRYING 6SLIEBTACK AR MABME50 TOW- TOPCOAT RINSE MARSjNNALAB ANGLE ASS 40 LANSISA SPA LSRIBS ANSEBIII ANGLE TO LEVEL FLAYS F SECTION C CBEESES SECTION 50 TSr BAA PUMP URE 4NEGS POBEGASE FROM JRES RRNNY CENTER AMOS WYOMING BEARROWN MIEN ORWA BIB TEMPLATE SIZES SNOWS ABE COMPENSATES FOR ANGLES OBTAINER WREN STUEB SUBBING-- SANSING OAT ANGLES BILL GIVE CORRECT MB SIZES ISTAB TEMPLATES CONE ALSO IWIMPI II PLY N I I iIIBPtYW-ETGRAN-SI L~SAW-jflR3WSJ [T77T N S E N PLATE 2 December1975 13 Launching Greater Soaring Hiking Soc field 2 hrs 8 mins Note 20 degrees down flap launch N-AS ---I j1J ZZ _ jrIz NIT K WLEL
Edition: Model Aviation - 1975/12
Page Numbers: 8, 9, 10, 11, 12, 13
THE CHALLENGER designed achieve glider would thermal well have good speed range high lift over drag ratio still docile enough easy handling beginner definite advantage competition accomplished especially turbulent windy conditions Clark Y airfoil selected after talking Bob Bienstein Paul Crowley about problems have RC sailplanes Bob mentioned fact AJ Smith won full-size Nationals few years back sailplane used Clark Y flaps sounded good selected airfoil designed years ago carrying heavy loads still maintaining high lift Dont afraid load up Challenger gets windy Dayton Ohio last year winds blowing 25 35 mph 27 ounces ballast performed beautifully bringing first place day mainly because its penetration stability rough conditions Remember want win competition have go down wind max-out Contest performance over past two years 14 first places 5 second places 3 third places 2 fourth places 1 fifth place 1973 ECSS Champion 1973 Nationals 3rd overall 1974 National Grand Cham pion 1974 Nationals best original design 1974 NSS Unlimited Class Champion 1974NSS Grand Champion Working level V LSF8-hour slope flight ac complished 2-hour 8-minute thermal flight also completed Construction Select wood carefully using light weight stockS-lb 6-lb balsa unless otherwise noted suggest use Tite bond glue throughout unless otherwise specified Follow construction sequence will have problems absolutely necessary constructing fuselage Wing Construction Splice together 1/16 sheet balsa /8 x ce spars /8 x a false leading edge alsa leading edge 1/16 plywood webbing 1/16 balsa webbing Make rib templates out 1/16 aluminum suitable material Cut 38 balsa rec tangles 1 x 10 long 1/16 sheet balsa sandwich between aluminum templates Use small screws long enough go through stack retain nut hold stack together Rough carve outline finish sanding templates Cut notches spars l file Make set ribs per half panel Using balsa rib #W-l template cut two ribs out /8 plywood Using balsa rib #W-2 W-3 W-4 W-5 templates cut two ribs out 1/16 plywood Cut out two 1/16 balsa W-28 ribs existing rib W-28 Cut two F-27 fuselage side plates out /x plywood time did drill holes F-27 now Using F-27s should spot glued together cut out s drilled together drill jig drill out holes plywood ribs W-1 through W-5 careful step very important best spot glue plywood ribs gether drill through simultaneously Notice holes line front spar Drill s wing ribs will assure exact alignment between wing fuselage Use 9/32 dia drill enlarge holes F-27 Start construction laying down wax paper over plans proceed fol lows Pin down lower 1/16 sheet balsa center 1/16 sheet balsa dihedral 1/16 sheet balsa Glue lower spruce spar sheeting drying pin down lower 1/16 sheet balsa trailing edge Glue lower 1/16 x 3/16 balsa cap strips lower angular /8 x ce spar Ribs #W-l through W-15 must notched out angular spar point sniffer tube holes also put Glue rib W- let dry Using web bing previously cut guide rib spac ing glue W-2 through W-38 glue webbing now Glue both W-28 ribs angle see section B-B make template set rib angle Note Cut out section ribs flap spars shown plans Glue 3/16 x t flap spar let dry Using 1/32 sheet balsa spacer between front flap spar rear flap spar glue rear flap spar rear ribs Glue 1/8 x ead ing edge should have bottom edge angled match upsweep ribs Using masking tape pull lower leading edge sheeting up contact ribs sub-leading edge tape Use Hot Stuff glue sheeting 8 Model Aviation Iiallcnge% ribs sub-leading edge Glue x spar angular x spar Rudder Cutout ribs R-l through R-15 R-21 out /4 sheet balsa spar stock 3/4 X II /2 pin down R-2l glue ribs R-l through R-15 1/16 x a brace balsa block 1/16 sheet balsa trailing edge Unpin add soft balsa blocks either end Sand shape bevel R-21 rudder movement shown section A-A MonoKote Vertical Stabilizer Cut out R-16 through R-20 F-25 F-26 F-26A see plans materials Spot glue R-20s soft balsa block shape shown side view section A-A including cut outs leading edge horn Remove R-20s cut contoured balsa block half accept fuselage former F-25 Glue Thermal sniffer removed show three servos middle servo flaps top servo elevator bottom R-20s F-25 insert horn rear servo rudder Nylon tube antenna 1200 mil pack shown will accommodate 1500 radio 3/32 ID brass tube horn epoxy Heathkit GD-lB 5-channel On-off switch over pack Below Thermal Sniffer position Glue half balsa block between two R-20s insert 3/32 ID brass tubing through horn epoxy eyelets R-20s retaining horn Glue F-26 F-26A F-26A previously glued F-26 R-20s Glue rib R-16 leading edge leading edge preshaped shown section A-A two piece R-19 R-18 R-17 /s balsa brace 1/8 balsa support Finally sheet both sides 1/16 balsa sand lightly MonoKote Fuselage Lay wax paper over plans pin down lower 3/16 spruce longerons pre-bend steaming longerons F-i F-2 formers should hang over front building board Use rubber bands hold together glueing F-I F-2 Ion gerons Make up wing tubing former assembly follows Sandwich front brass tubing between formers F-7 F-8 using F-8B F-8C spacers use epoxy Like wise sandwich rear brass tubing between formers F-b F-ll using F-hA F-I lB spacers Bend flap-drive wire shown solder 1/16 brass horn wire brass tubing horn put wire before bending shown plans Take tubing assemblies glue F-27s side along formers F-6 F-12 four s x /8 plywood braces shown plans Epoxy flap horn place along 1/8 plywood braces Glue assembly place onto lower longerons glue formers F-l through F-5 F-5A F-13 through F-24 glue both top 3/16 sq spruce longerons Make up pushrods put fuselage now cannot installed after fuselage complete unless use nyrodsdo recommend Unpin wing slide edge board use two 36 aluminum yardsticks buy local hardware approximately 50 washout trailing edge wing screw yardsticks building board Repin wing down board trailing edge over washout yardstiaks Epoxy brass wing tubes place add hardwood plywood balsa webbing webbing out rib W-9 epoxy W-l0 through W-36 Tite bond Add plywood front corner brace hardwood blocks eyescrews balsa fill-in between W-l W-2 December1975 9 Flap-spoiler function 40 degrees down flap gives full spoiler Rubber band pull spoiler down flap 20 degrees less Challenger sniffer tube Cut out ribs W-17 through W-21 spoiler glue 3/16 sq balsa spoiler Add balsa brace W-27 front flap spar Trim balsa false leading edge using razor-blade plane followed sanding final angular shape Next glue upper 1/16 balsa sheeting 1/16 balsa trailing edge 1/16 balsa flap top surface bevel edge shown plans Add 1/16 x 3/16 cap strips center 1/16 sheeting dihedral 1/16 sheeting 1/16 sheeting tween ribs W-18 W-19 Remove board dry trim front sheeting flush false lead ing edge Glue alsa leading edge add wing tip block carve sand final shape shown Sand entire wing cut flap loose cut wing tip add dihedral using /8 plywood braces shown Construct spoiler using 1/16 sheet balsa /8 sq balsa shown plans Super Monokote wing flap spoiler Epoxy load hinge wing root flap root Tape 1/32 sheet balsa bottom wing flap fold flap down onto sheet tape place Run piece Slicktack along hinge line untape remove 1/32 balsa Next bring flap neutral position flying position put tape end flap dihedral break hold flap align ment 1/32 spacing run piece Slicktack along bottom wing flap Using fine saw cut expansion slots shown front spar flap Add 005 brass bent around flap retain epoxy front 00-80 screws nuts Add aluminum drive-angle brackets flap root shown Add 1/16 plywood arm spoiler use epoxy Slicktack wing Epoxy 3/16 dia aluminum tubing spoiler string Cut slot top sheeting flap 1/16 plywood spoiler horn epoxy place Epoxy eyelets wing hold-ons Add small rubber band hooks spoiler wing epoxy shown Stabilizer Make rib templates out 1/16 aluminum Cut eleven balsa rectangles long 1/16 balsa sheet sandwich between aluminum templates using screws retain wing ribs Rough carve outline finish sanding match templates Cut notches leading edge spars trailing edge small file Make set ribs per half stab Using balsa rib S-l S-2 templates cut two ribs 1/16 plywood Glue balsa rib S-I ply wood rib S-I doubler Drill i/g dia holes brass tubing left panel 3/32 dia drill right ribs time taking care drill exact center dis tance Use aluminum horn drill guide aluminum horn should drilled 3/32 holes first back hole en larged i/8 dia front hole 5/32 dia Build both halves stab together Pin down lower /s x 3/16 spar glue ribs S-I through 5-11 Add 1/i x 3/16 top spar leading edge bottom trailing edge Add top trailing edge let dry Unpin side stab put 3/32 lD brass tubing left half stab along locking collar epoxy place yet also make sure have filed hole front tubing allow set screw clamp wire Next slide both 3/32 dia stab wires Slide 3/32 lD brass tube rear aluminum horn front 3/32 ID spacer tube front /8 ID brass tube slide aluminum horn over Next slide right half stab over 3/32 wires pin down Position 3/32 wires shown epoxy place right stab HG 01* PIANO WINE S SOLDER 17R 0 TUNING SECTION E-E N NOTE DO VOl INCREASE DIREDOAL-OJDDER UREA WOULD BE INSUFFICIENT AND GLIDER BILL BE UNSTARLE 7 Epoxy brass tubes locking collar left stab shown epoxy 3/32 ID brass tube rear hole horn time Epoxy /8 ID brass tube front horn shown Glue 1/16 sheet balsa webbing shown dry unpin add stab tip blocks Sand complete MonoKote Glue completed vertical stabilizer connect stab pushrod Add 1/16 sheet balsa fill-in shown plans lower upper longerons epoxy antenna nyrod Glue 3/16 sq balsa diagonals rear fuselage also LEVEL rLS GOD SCOPE FLIGHT COSTEST PERFORMANCE573 NI SI PLACES IIIZOO PLACE 143 PLACES 3OVERALL INTO NATL IRiSECRO GRAND CHAMPION IOTANSS GRAND CHAMPION 1974NSS OPEN CLASS CHAMPION 1974SOARISO NATO GRAND COANPIOS T 7 Jj MATT CONENEt0FT _ 11 COOPI ____ F K / SHIN MACGA PILL-IN MACGA PILPCI pCI TOP IREFP-RN HG CO 4 JML -NA GGARINSDONH LI-30 10 mASS Nlj IHDr PLO PRONRENSINGBRIG IIIGIDE IHALG Fl TO URING IDOANLE TAMING .OInP00TIIHNNGLSA OHIO SO GPRUCE GOPT BALSA- IHN PITBOO I ----- \l ROCK O*RRI -0 BALSAI l E LANBATE i~I-o~-. 01PIA II 4 5~DC B-,1011V II NOSE MACLAGIH4MOHG 0*0 BOG 440 SLING 5 RE 00 NOTEIP-ON PILL-IN ALL AREAS MAUlED BOOI N5mAHRILSAJj5TEORmJ HGPLOO 00GOJUSTARLE I7MNALSA SOKET PAl MODEL 1110W MISSIO PROENIO AR 10 Model Aviation Shows flap wing root Aluminum drive angle bracket slot Fuselage drive wire fits slot actuate flaps Also shows eyebolts retain wings fuselage 3/16 sheet balsa fill-in entire fuselage shown plans Glue /8 sheet balsa top fuselage Construct ballast box shown plans Remove top part fuselage glue bottom formers F-3A F-4A F-5B F-6A F-8A F-9 F-lOA F-12A F-13A Glue / x wood tow-hook re tainer blind nuts previously epoxied /8 sq longerons Next glue bal last boxes fill-in between formers 3/16 sheet balsa shown Glue soft balsa block up front nose block /8 plywood canopy retainer Spot glue canopy can either solid block laminated balsaalso 3/16 locating dowel rough carve shape sand entire fuselage Glue 1/32 plywood bottom surfaces indicated plans sand flush Cut loose previously spotglued canopy add radio gear hook up pushrods MonoKote fuselage ballast box door canopy Glue ood skid F-28 attach tow hook attach rudder hook up pushrod turn page Plans Challenger avail able through Model Aviation Plan Service large one-piece plan costing $800 available Otto Heithecker 2129 Parmenter Apt 3 Royal Oak Mich 48073 0584888 000080088058 50808 2024 11888 SO 8484 EcONAAX 88838 OCX 500 0 08488 0888 C XXII OS 885 CAPE AS 88013 50 * 8*8 XE //X F-OX ISWPLTFT88OPZ4I u&LSflESCON8RJOT8SJ 11/1X PLY 800 8 7 00 I3/3ZPLYFO5I III50AL84XIThfOII 18I788IXI L8AIS 82 PAR 808005088 0 XE IXXXE OP TXE w8-I EOIASA1___ L280001 P gRACEI8S8LSAj P88 8885 ~~SOFT XALS8 _______ IN 8*LP KIM SALc FOR 8850 / 53 84 8-148X IiN%IIflALNA841 818 SOILS COMPLETE 1801I/I6SALSA C05C8840 S ATTACO jjT II TO FUSE 008188 CONXT8 8-00/JiII/XIOLS&Z4f II8UL8A/ZXi~4 FILL-IN -8I8 8 &OCX ~jNAKX 04P28080 88088808888880 8884 38882 REOS888080* N80808488 00888 POSE AXE ECUCHA LLENGER 0040 1451/2 WINGAREA124000N WOIGHT 88 ONCES 80800DRAWN BY OTTO IIEITIICORER 48808INKED BY 800CR GREENEPLATE 80001 AVIATION 8 FE December 1975 11 Ballasit compartment divided sections located above forward tow hook Ballast compart mont door lies next fuselage Adjustable position tow hook also may seen flight winds up 35 mph author used 27 oz ballast pictures Bud Manning 18808 50500 31t80 SALSA TOPPOX ANT \ 48 880883/16 SO SP800E Challenger altitude hold onto glider until winch 10-degrees flap strong thermals builds up plenty pull heave Thats penetration raise flap negative 8Radio Installation Heathkit 5-chan- right heave Dont just let go degrees reflex position use little nel GD-19 used ship almost High Start use either bungie mini- down elevator until builds up speed radio will fit abun- mum 5/16 OD surgical tubingl/16 hold position maintain speed danceof room wall greater use 10-degrees flap also gives much greater LD Flying Check surfaces proper setting attempt use 20-degrees would expect Add ballast box alignment make sure free flap high starting will stall winds increase achieve penetration warps Add ballast nose until balances Challenger gentle very stable forgiving returning down-wind thermals CG position shown winch tows yet can very fast thermaling hope will enjoy Challenger use 20-degrees down flap maximum use 5-degrees flap weak thermals much have F47F -I 1 R WA 31L w F 4 --II \iV7341L1__ TITI_171W --- T-1421 B BALSA - W3S IB ID LOCKYS CALLER S1SSSeSiSSSSSSS-S52SI __LuzF-4 I S 2 414 -I -z7-~WZS\1\ W-22 W-25 TSP BREETIWS 0 3Ir IZ BALSA / _I IIA BALSA ISIl YSE AlA PlANS WIRE S-S W 27 ISnI -SS-A7 -- B B BII JL - WLIL JI 2 LIE PLY ISIl 12 Model Aviation ID Left Shows stab-rudder fillet slot rear stab wire rudder horn pushrod connection Above Stab halves wires intact half OO5 BRASS K R-ER __ A 3IOCAP STRIPSIBALSA -A_ 7—2zzzzi M-30 11] 7 IS- ~SPR ACE HK 1LiZi H WASNOUT-STARTS AT ROOT RIB 1R37 7Z1 -I -f RARBWOOO 7SS US AIBSSG TOB 5*5 F FE LGRITR IE \,eIrBA5A SOASOES IIC PLO OUCRON LINE3IG ALUM TUBING ALL OTOEB WEBBING IIR BALSA VERTICAL GSA B FILL INISIIBPLO PILL INI4IOPLACE BrSL CBTACB SECTION58RASS EAPRGSE PLACESJRREPLERIII LOAS CARRYING 6SLIEBTACK AR MABME50 TOW- TOPCOAT RINSE MARSjNNALAB ANGLE ASS 40 LANSISA SPA LSRIBS ANSEBIII ANGLE TO LEVEL FLAYS F SECTION C CBEESES SECTION 50 TSr BAA PUMP URE 4NEGS POBEGASE FROM JRES RRNNY CENTER AMOS WYOMING BEARROWN MIEN ORWA BIB TEMPLATE SIZES SNOWS ABE COMPENSATES FOR ANGLES OBTAINER WREN STUEB SUBBING-- SANSING OAT ANGLES BILL GIVE CORRECT MB SIZES ISTAB TEMPLATES CONE ALSO IWIMPI II PLY N I I iIIBPtYW-ETGRAN-SI L~SAW-jflR3WSJ [T77T N S E N PLATE 2 December1975 13 Launching Greater Soaring Hiking Soc field 2 hrs 8 mins Note 20 degrees down flap launch N-AS ---I j1J ZZ _ jrIz NIT K WLEL
Edition: Model Aviation - 1975/12
Page Numbers: 8, 9, 10, 11, 12, 13
THE CHALLENGER designed achieve glider would thermal well have good speed range high lift over drag ratio still docile enough easy handling beginner definite advantage competition accomplished especially turbulent windy conditions Clark Y airfoil selected after talking Bob Bienstein Paul Crowley about problems have RC sailplanes Bob mentioned fact AJ Smith won full-size Nationals few years back sailplane used Clark Y flaps sounded good selected airfoil designed years ago carrying heavy loads still maintaining high lift Dont afraid load up Challenger gets windy Dayton Ohio last year winds blowing 25 35 mph 27 ounces ballast performed beautifully bringing first place day mainly because its penetration stability rough conditions Remember want win competition have go down wind max-out Contest performance over past two years 14 first places 5 second places 3 third places 2 fourth places 1 fifth place 1973 ECSS Champion 1973 Nationals 3rd overall 1974 National Grand Cham pion 1974 Nationals best original design 1974 NSS Unlimited Class Champion 1974NSS Grand Champion Working level V LSF8-hour slope flight ac complished 2-hour 8-minute thermal flight also completed Construction Select wood carefully using light weight stockS-lb 6-lb balsa unless otherwise noted suggest use Tite bond glue throughout unless otherwise specified Follow construction sequence will have problems absolutely necessary constructing fuselage Wing Construction Splice together 1/16 sheet balsa /8 x ce spars /8 x a false leading edge alsa leading edge 1/16 plywood webbing 1/16 balsa webbing Make rib templates out 1/16 aluminum suitable material Cut 38 balsa rec tangles 1 x 10 long 1/16 sheet balsa sandwich between aluminum templates Use small screws long enough go through stack retain nut hold stack together Rough carve outline finish sanding templates Cut notches spars l file Make set ribs per half panel Using balsa rib #W-l template cut two ribs out /8 plywood Using balsa rib #W-2 W-3 W-4 W-5 templates cut two ribs out 1/16 plywood Cut out two 1/16 balsa W-28 ribs existing rib W-28 Cut two F-27 fuselage side plates out /x plywood time did drill holes F-27 now Using F-27s should spot glued together cut out s drilled together drill jig drill out holes plywood ribs W-1 through W-5 careful step very important best spot glue plywood ribs gether drill through simultaneously Notice holes line front spar Drill s wing ribs will assure exact alignment between wing fuselage Use 9/32 dia drill enlarge holes F-27 Start construction laying down wax paper over plans proceed fol lows Pin down lower 1/16 sheet balsa center 1/16 sheet balsa dihedral 1/16 sheet balsa Glue lower spruce spar sheeting drying pin down lower 1/16 sheet balsa trailing edge Glue lower 1/16 x 3/16 balsa cap strips lower angular /8 x ce spar Ribs #W-l through W-15 must notched out angular spar point sniffer tube holes also put Glue rib W- let dry Using web bing previously cut guide rib spac ing glue W-2 through W-38 glue webbing now Glue both W-28 ribs angle see section B-B make template set rib angle Note Cut out section ribs flap spars shown plans Glue 3/16 x t flap spar let dry Using 1/32 sheet balsa spacer between front flap spar rear flap spar glue rear flap spar rear ribs Glue 1/8 x ead ing edge should have bottom edge angled match upsweep ribs Using masking tape pull lower leading edge sheeting up contact ribs sub-leading edge tape Use Hot Stuff glue sheeting 8 Model Aviation Iiallcnge% ribs sub-leading edge Glue x spar angular x spar Rudder Cutout ribs R-l through R-15 R-21 out /4 sheet balsa spar stock 3/4 X II /2 pin down R-2l glue ribs R-l through R-15 1/16 x a brace balsa block 1/16 sheet balsa trailing edge Unpin add soft balsa blocks either end Sand shape bevel R-21 rudder movement shown section A-A MonoKote Vertical Stabilizer Cut out R-16 through R-20 F-25 F-26 F-26A see plans materials Spot glue R-20s soft balsa block shape shown side view section A-A including cut outs leading edge horn Remove R-20s cut contoured balsa block half accept fuselage former F-25 Glue Thermal sniffer removed show three servos middle servo flaps top servo elevator bottom R-20s F-25 insert horn rear servo rudder Nylon tube antenna 1200 mil pack shown will accommodate 1500 radio 3/32 ID brass tube horn epoxy Heathkit GD-lB 5-channel On-off switch over pack Below Thermal Sniffer position Glue half balsa block between two R-20s insert 3/32 ID brass tubing through horn epoxy eyelets R-20s retaining horn Glue F-26 F-26A F-26A previously glued F-26 R-20s Glue rib R-16 leading edge leading edge preshaped shown section A-A two piece R-19 R-18 R-17 /s balsa brace 1/8 balsa support Finally sheet both sides 1/16 balsa sand lightly MonoKote Fuselage Lay wax paper over plans pin down lower 3/16 spruce longerons pre-bend steaming longerons F-i F-2 formers should hang over front building board Use rubber bands hold together glueing F-I F-2 Ion gerons Make up wing tubing former assembly follows Sandwich front brass tubing between formers F-7 F-8 using F-8B F-8C spacers use epoxy Like wise sandwich rear brass tubing between formers F-b F-ll using F-hA F-I lB spacers Bend flap-drive wire shown solder 1/16 brass horn wire brass tubing horn put wire before bending shown plans Take tubing assemblies glue F-27s side along formers F-6 F-12 four s x /8 plywood braces shown plans Epoxy flap horn place along 1/8 plywood braces Glue assembly place onto lower longerons glue formers F-l through F-5 F-5A F-13 through F-24 glue both top 3/16 sq spruce longerons Make up pushrods put fuselage now cannot installed after fuselage complete unless use nyrodsdo recommend Unpin wing slide edge board use two 36 aluminum yardsticks buy local hardware approximately 50 washout trailing edge wing screw yardsticks building board Repin wing down board trailing edge over washout yardstiaks Epoxy brass wing tubes place add hardwood plywood balsa webbing webbing out rib W-9 epoxy W-l0 through W-36 Tite bond Add plywood front corner brace hardwood blocks eyescrews balsa fill-in between W-l W-2 December1975 9 Flap-spoiler function 40 degrees down flap gives full spoiler Rubber band pull spoiler down flap 20 degrees less Challenger sniffer tube Cut out ribs W-17 through W-21 spoiler glue 3/16 sq balsa spoiler Add balsa brace W-27 front flap spar Trim balsa false leading edge using razor-blade plane followed sanding final angular shape Next glue upper 1/16 balsa sheeting 1/16 balsa trailing edge 1/16 balsa flap top surface bevel edge shown plans Add 1/16 x 3/16 cap strips center 1/16 sheeting dihedral 1/16 sheeting 1/16 sheeting tween ribs W-18 W-19 Remove board dry trim front sheeting flush false lead ing edge Glue alsa leading edge add wing tip block carve sand final shape shown Sand entire wing cut flap loose cut wing tip add dihedral using /8 plywood braces shown Construct spoiler using 1/16 sheet balsa /8 sq balsa shown plans Super Monokote wing flap spoiler Epoxy load hinge wing root flap root Tape 1/32 sheet balsa bottom wing flap fold flap down onto sheet tape place Run piece Slicktack along hinge line untape remove 1/32 balsa Next bring flap neutral position flying position put tape end flap dihedral break hold flap align ment 1/32 spacing run piece Slicktack along bottom wing flap Using fine saw cut expansion slots shown front spar flap Add 005 brass bent around flap retain epoxy front 00-80 screws nuts Add aluminum drive-angle brackets flap root shown Add 1/16 plywood arm spoiler use epoxy Slicktack wing Epoxy 3/16 dia aluminum tubing spoiler string Cut slot top sheeting flap 1/16 plywood spoiler horn epoxy place Epoxy eyelets wing hold-ons Add small rubber band hooks spoiler wing epoxy shown Stabilizer Make rib templates out 1/16 aluminum Cut eleven balsa rectangles long 1/16 balsa sheet sandwich between aluminum templates using screws retain wing ribs Rough carve outline finish sanding match templates Cut notches leading edge spars trailing edge small file Make set ribs per half stab Using balsa rib S-l S-2 templates cut two ribs 1/16 plywood Glue balsa rib S-I ply wood rib S-I doubler Drill i/g dia holes brass tubing left panel 3/32 dia drill right ribs time taking care drill exact center dis tance Use aluminum horn drill guide aluminum horn should drilled 3/32 holes first back hole en larged i/8 dia front hole 5/32 dia Build both halves stab together Pin down lower /s x 3/16 spar glue ribs S-I through 5-11 Add 1/i x 3/16 top spar leading edge bottom trailing edge Add top trailing edge let dry Unpin side stab put 3/32 lD brass tubing left half stab along locking collar epoxy place yet also make sure have filed hole front tubing allow set screw clamp wire Next slide both 3/32 dia stab wires Slide 3/32 lD brass tube rear aluminum horn front 3/32 ID spacer tube front /8 ID brass tube slide aluminum horn over Next slide right half stab over 3/32 wires pin down Position 3/32 wires shown epoxy place right stab HG 01* PIANO WINE S SOLDER 17R 0 TUNING SECTION E-E N NOTE DO VOl INCREASE DIREDOAL-OJDDER UREA WOULD BE INSUFFICIENT AND GLIDER BILL BE UNSTARLE 7 Epoxy brass tubes locking collar left stab shown epoxy 3/32 ID brass tube rear hole horn time Epoxy /8 ID brass tube front horn shown Glue 1/16 sheet balsa webbing shown dry unpin add stab tip blocks Sand complete MonoKote Glue completed vertical stabilizer connect stab pushrod Add 1/16 sheet balsa fill-in shown plans lower upper longerons epoxy antenna nyrod Glue 3/16 sq balsa diagonals rear fuselage also LEVEL rLS GOD SCOPE FLIGHT COSTEST PERFORMANCE573 NI SI PLACES IIIZOO PLACE 143 PLACES 3OVERALL INTO NATL IRiSECRO GRAND CHAMPION IOTANSS GRAND CHAMPION 1974NSS OPEN CLASS CHAMPION 1974SOARISO NATO GRAND COANPIOS T 7 Jj MATT CONENEt0FT _ 11 COOPI ____ F K / SHIN MACGA PILL-IN MACGA PILPCI pCI TOP IREFP-RN HG CO 4 JML -NA GGARINSDONH LI-30 10 mASS Nlj IHDr PLO PRONRENSINGBRIG IIIGIDE IHALG Fl TO URING IDOANLE TAMING .OInP00TIIHNNGLSA OHIO SO GPRUCE GOPT BALSA- IHN PITBOO I ----- \l ROCK O*RRI -0 BALSAI l E LANBATE i~I-o~-. 01PIA II 4 5~DC B-,1011V II NOSE MACLAGIH4MOHG 0*0 BOG 440 SLING 5 RE 00 NOTEIP-ON PILL-IN ALL AREAS MAUlED BOOI N5mAHRILSAJj5TEORmJ HGPLOO 00GOJUSTARLE I7MNALSA SOKET PAl MODEL 1110W MISSIO PROENIO AR 10 Model Aviation Shows flap wing root Aluminum drive angle bracket slot Fuselage drive wire fits slot actuate flaps Also shows eyebolts retain wings fuselage 3/16 sheet balsa fill-in entire fuselage shown plans Glue /8 sheet balsa top fuselage Construct ballast box shown plans Remove top part fuselage glue bottom formers F-3A F-4A F-5B F-6A F-8A F-9 F-lOA F-12A F-13A Glue / x wood tow-hook re tainer blind nuts previously epoxied /8 sq longerons Next glue bal last boxes fill-in between formers 3/16 sheet balsa shown Glue soft balsa block up front nose block /8 plywood canopy retainer Spot glue canopy can either solid block laminated balsaalso 3/16 locating dowel rough carve shape sand entire fuselage Glue 1/32 plywood bottom surfaces indicated plans sand flush Cut loose previously spotglued canopy add radio gear hook up pushrods MonoKote fuselage ballast box door canopy Glue ood skid F-28 attach tow hook attach rudder hook up pushrod turn page Plans Challenger avail able through Model Aviation Plan Service large one-piece plan costing $800 available Otto Heithecker 2129 Parmenter Apt 3 Royal Oak Mich 48073 0584888 000080088058 50808 2024 11888 SO 8484 EcONAAX 88838 OCX 500 0 08488 0888 C XXII OS 885 CAPE AS 88013 50 * 8*8 XE //X F-OX ISWPLTFT88OPZ4I u&LSflESCON8RJOT8SJ 11/1X PLY 800 8 7 00 I3/3ZPLYFO5I III50AL84XIThfOII 18I788IXI L8AIS 82 PAR 808005088 0 XE IXXXE OP TXE w8-I EOIASA1___ L280001 P gRACEI8S8LSAj P88 8885 ~~SOFT XALS8 _______ IN 8*LP KIM SALc FOR 8850 / 53 84 8-148X IiN%IIflALNA841 818 SOILS COMPLETE 1801I/I6SALSA C05C8840 S ATTACO jjT II TO FUSE 008188 CONXT8 8-00/JiII/XIOLS&Z4f II8UL8A/ZXi~4 FILL-IN -8I8 8 &OCX ~jNAKX 04P28080 88088808888880 8884 38882 REOS888080* N80808488 00888 POSE AXE ECUCHA LLENGER 0040 1451/2 WINGAREA124000N WOIGHT 88 ONCES 80800DRAWN BY OTTO IIEITIICORER 48808INKED BY 800CR GREENEPLATE 80001 AVIATION 8 FE December 1975 11 Ballasit compartment divided sections located above forward tow hook Ballast compart mont door lies next fuselage Adjustable position tow hook also may seen flight winds up 35 mph author used 27 oz ballast pictures Bud Manning 18808 50500 31t80 SALSA TOPPOX ANT \ 48 880883/16 SO SP800E Challenger altitude hold onto glider until winch 10-degrees flap strong thermals builds up plenty pull heave Thats penetration raise flap negative 8Radio Installation Heathkit 5-chan- right heave Dont just let go degrees reflex position use little nel GD-19 used ship almost High Start use either bungie mini- down elevator until builds up speed radio will fit abun- mum 5/16 OD surgical tubingl/16 hold position maintain speed danceof room wall greater use 10-degrees flap also gives much greater LD Flying Check surfaces proper setting attempt use 20-degrees would expect Add ballast box alignment make sure free flap high starting will stall winds increase achieve penetration warps Add ballast nose until balances Challenger gentle very stable forgiving returning down-wind thermals CG position shown winch tows yet can very fast thermaling hope will enjoy Challenger use 20-degrees down flap maximum use 5-degrees flap weak thermals much have F47F -I 1 R WA 31L w F 4 --II \iV7341L1__ TITI_171W --- T-1421 B BALSA - W3S IB ID LOCKYS CALLER S1SSSeSiSSSSSSS-S52SI __LuzF-4 I S 2 414 -I -z7-~WZS\1\ W-22 W-25 TSP BREETIWS 0 3Ir IZ BALSA / _I IIA BALSA ISIl YSE AlA PlANS WIRE S-S W 27 ISnI -SS-A7 -- B B BII JL - WLIL JI 2 LIE PLY ISIl 12 Model Aviation ID Left Shows stab-rudder fillet slot rear stab wire rudder horn pushrod connection Above Stab halves wires intact half OO5 BRASS K R-ER __ A 3IOCAP STRIPSIBALSA -A_ 7—2zzzzi M-30 11] 7 IS- ~SPR ACE HK 1LiZi H WASNOUT-STARTS AT ROOT RIB 1R37 7Z1 -I -f RARBWOOO 7SS US AIBSSG TOB 5*5 F FE LGRITR IE \,eIrBA5A SOASOES IIC PLO OUCRON LINE3IG ALUM TUBING ALL OTOEB WEBBING IIR BALSA VERTICAL GSA B FILL INISIIBPLO PILL INI4IOPLACE BrSL CBTACB SECTION58RASS EAPRGSE PLACESJRREPLERIII LOAS CARRYING 6SLIEBTACK AR MABME50 TOW- TOPCOAT RINSE MARSjNNALAB ANGLE ASS 40 LANSISA SPA LSRIBS ANSEBIII ANGLE TO LEVEL FLAYS F SECTION C CBEESES SECTION 50 TSr BAA PUMP URE 4NEGS POBEGASE FROM JRES RRNNY CENTER AMOS WYOMING BEARROWN MIEN ORWA BIB TEMPLATE SIZES SNOWS ABE COMPENSATES FOR ANGLES OBTAINER WREN STUEB SUBBING-- SANSING OAT ANGLES BILL GIVE CORRECT MB SIZES ISTAB TEMPLATES CONE ALSO IWIMPI II PLY N I I iIIBPtYW-ETGRAN-SI L~SAW-jflR3WSJ [T77T N S E N PLATE 2 December1975 13 Launching Greater Soaring Hiking Soc field 2 hrs 8 mins Note 20 degrees down flap launch N-AS ---I j1J ZZ _ jrIz NIT K WLEL