RADIO CONTROL SOARING OUR US F3B TEAM will competing August 6-15 1993 biennial F3B World Championships multi-task soaring contest will held near Tel Aviv Israel team includes pilots Larry Jolly Daryl Perkins Randy Spencer Team manager 1977 F3B World Champ Skip Miller Joe Wurts won 1991 Champs Holland defending F3B World Champion Daryl Perkins placed second Holland US team finished third behind Germany Great Britain guys practicing hard take 1993 team win time team needs support American sailplaners Until F3J Thermal Duration Soaring World Champs held 1995 F3B international event RC soaring team needs raise funds H 10 MAKO Specifications Wing Span 1140 Wing Area 9480 sqin Aspect Ratio 137 Airfoil 7037 RG15 Weight 68 oz Wing Loading 103 oz/sqft Fuselage Fibergiass/Keviar Wings Obechi/Fosa Type Precision Duration Designed 8en Clerx 7/92 help defray transportation practice costs arc picked up AMA Team members have organized giant merchandise raffle tickets $5 also selling official team logo T-shirts M L XL XXL $15 pins $3 patches $5 stickers $2 Please add 10% merchandise total shipping handling merchandise order over $25 will receive free team pin Send check raffle tickets merchandise 1993 USA Soaring Team 15781 Empire Lane Westminster CA 92683 Building flying Shadow 118 Over winter built Shadow 118 glider designed Roger Chastain kitted Rogers company Tekoa Center Design Roger industrial designer n K S profession has used engineering experience add nice touches Shadow kit Shadows appearance reminds Falcon 880 its bigger Its 118-inch August1993 59 jim Moyfllflafl5 moaei OT 1~b unanuie Herring hang glider part EOGASE exhibit display National Soaring Museum Shadow 118 Open Class contest sailplane designed Roger Chastain threemeter-span ship thermal duration contest flying sport flying Shadow 118 kits pre-sheeted wings stabs rudder minimize building time Ben Clerx latest Mako Semikits available Ben 1, 2 K 3I/ h z 4 Left Three-view Mako latest design Ben Clerx Above Ben Clerx L Roger Lackey seem justly proud Makos Both guys belong Harbor Soaring Society southern California Interested Soaring Electric Flight Great So Are Northeast Sailplane Products carry comprehensive line silent flight prod ucts industry sell RIO Sail planes Electrics related accessories reference features hundreds products doz ens informative articles technical infor mation great sport RIO silent flight can meet needs abilities beginner expert dedicated pro viding personal customer service Check out NSP. youll glad did Welcome world NSP first open unique reference will awe number quality products have Also ordering us easy fun because help step way order reference mail $700 $5 plus $2 s&h NSP Well ship reference via express mail arent completely satisfied simply send back prompt courteous refund Northeast Sailplane Products 16 Kirby Lane Williston Vermont 05495 Northeast Sailplane Products 1993 RC Soaring Electric Reference N Price $5 Northeast Sailplane Products irby Lane Williston VT 05495 C802 658-9482 comprehensive reference Radio Control Soaring Electric Flight wingspan six inches longer Falcon wing area994 square inchesis well over 100 square inches greater Shadow uses todays popular thermal airfoil SD7037 Fuselage dimensions Shadow Falcon virtually identical Shadow kit first batch build-em-yourself obechi-over foam wings Current kits have prebuilt wings molded wing tips really good deal because much money save lot construction time end up lighter finished glider Shadow weighs 78 ounces giving dry wing loading 115 ounces per square foot pre-sheeted wing kits weigh about 70 ounces loading will right around 10 ounces per square foot should ideal dry wing loading low wind conditions Ballast can added fuselage wind picks up about 10 mph though Shadow didnt have pre-sheeted wings everything kit beautifully fabricated building instructions complete con structing wings took bit time actually interesting operation because got guts speak used F Z Lam epoxy bagged wings Theres about bagging obechi come no conventional spar wing brass joiner tube carried between -inch ply root rib /8-inch sub-rib six inches out spar tapered strips fairly heavy unidirectional carbon fibertwo top bottom dont know construction same used pre-sheeted kits Ive found wings super-stiff fuselage excellently formed fiberglass trimmed fit canopy Finishing fuselage conventional except Roger has make three little foam plugs hold pushrod tubes proper places along fuselage sides Thats good idea wing joiner V-inch-round 14inch-long piece high-strength 7075T-6 aluminum dihedral angle bent fit between joiner brass wing tubes perfect like shake assembled gliders see anything sounds loose Shadow doesnt rattle its solid respects first wondered about strength aluminum joiner its proven adequate Neither joiner nor wings show much deflection during launch fact Shadow about best launching plane Ive flown must happy combination towhook location wing stiffness airfoil etc ship wants climb straight up building instructions Roger mentions son Blayne prefers rearward towhook location first launch scared because soon model left hand took off straight up like kite strong wind instant visions old stall snap roll over trick didnt though Flying Shadow 118 lot fun As just mentioned launching can exciting really no sweat once get sticks Good zooms easy after learn tim ing full winch pedal dive/acceleration pull-up Off tow Shadow handles much like Falcon 880 except think its easier fly say easier mean once center gravity CG stab settings dialed Shadow overly critical pitch control couple clicks up down stab trim change flying speed bit dont make terribly dramatic difference plane performs Also additional size weight Shadow give momentum help keep going its pointed doesnt skitter around still shows clearly encounters lift Once lift Shadow excellent climber no problem staying cored coordinated thermal turns after aileron differential coupled rudder adjusted liking Just personal aside impression first flew heavier ships like Mueller Comet 89T reminded driving Cadillac Everything smooth stable solid Shadow gives some feeling too Continued page 63 60 Model Aviation oaringlBlakeslee Continued page 60 can sort motor around sky giving up lot altitude say lift-to-drag L/D ratio very good Since no free lunch what give up heavier ship ability float out early morning no-lift situations However 10 ounces per square foot pre-sheeted wing kit Shadow rates medium wing-loading glider should perfect conditions Landings pretty much same routine flapped ships key getting model slowed down establish ing glide angle/flap setting depends wind speed Low wind speeds require flap shallower final glide youre going too fast approaching spot Higher winds mean lower ground speed need less flap steeper glide angle penetrate spot Shadow behaves quite nicely landing pattern glide angle can easily adjusted flap stick its just matter lots practice get timing down all-important 100point precision spot landings computer radio strongly recom mended ship like Shadow because electronic mixing makes setting up flying lot easier Coupled flap/down-elevator compensation big help because flaps go down nose wants come up Up ailerons coupled down flapsthe crow configurationis another helpful option adds drag helps glider sink think Shadow 118 excellent choice all-around thermal contest ship glider just have fun Kits available $35995 exclusively Northeast Sailplane Products new two-meter version Shadow also available $27495 NSPs address 16 Kirby Lane Williston VT 05495 call 802 658-9482 Mako Ben Clerx Ben has Californias successful competition pilots Last year won hotly contested Fall Soaring Festival Visalia old Falcon 880 Ben has developing own designs over past few years latest version Mako very pretty bird good example current thinking California contest soaring scene Ben has switched obechi-sheeted foam wings Although such construction may high tech glass-bagged wings obechi works fine straight thermal ships because can built lighter quite serviceable Anyway its always instructive see what top guys doing because obviously spend lot time hobby always figure out best tricks before rest us Bens description new Mako Mako competition sailplane designed precision duration thermal contests F3J competition using slightly longer 118-inch wingspan retains crisp responsive handling characteristics F3B-type sailplane fourth version design series goes back 1987 con struction third version Dazzle too complex builders needed simplified glass-bagged wings $90 carbon-fiber spar system Construction Mako similar other competition sailplanes intended advanced-to-expert builder pilot main design objective have plane would easily max thermal duration requirements cover plenty ground search lift should also responsive aerobaticnot fight off boredom after skying out also improve all-important landing scores 5D7037 airfoil 10 22 ounces per square foot will give required flight times lightest lift conditions flat wing triple-tapered leading edge has no tip stalling tendency tracks though rails during landings particularly gusty winds Although polyhedral tips winglets make Continued page 64 August 1993 63 UFM Ultimate Fun Machine LEX Electric powered N/C ultra-light s-off stable anybody can fly mbles easily evening All prefabricated components No painting no sanding necessary Two kit versions available #31 74 Skyflex Basic Kit #3184 Skyflex electric power system prewired motor on/off switch Required inexpensive accessories 2-channel aircraft radio 7-cell nicad battery Battery charger see 93 Robbe catalog details lie 170 Township Line Road Belle Mead NJ 08502 908 359-2115 Call nearest Robbe Dealer N-200AAA2200 N-150N2150 N-11OAA2110 N-270AA2270 N-600AA2600 N-500A2500 N-6SOSC2650 KR-2000C2 2000 KR-AAOOD2 4400 OAAE2700 N 225AE2225 KR 600AE2600 KR 1000AEL21000 KR-1200AE21200 KR-1700SCE21700 KR-2400CE22400 N-600SCR12600 N-1000SCR12900 N-1AOOSCR121400 N-1500SCR121500 N-hOOCh121100 N-1800C1T121800 N-400000124000 - Specify Solder labs AN-SOAAA AN-i SON 4N-200AAA AN-i 1OAA AN-225AE 4N-270AA 4N-600AA 4 N-i SO-AAE AN-SOOA AN-600AE AN-800AR AKR-1000AE 4 KIT- 1 200AE N-650SC 4N-1000SCR 4KR-1300SC AN-i AOOSCR 4KR- 1 700SGE AKR-2000C AKR-2400CE 4KR-2800CE 4 KR-A AOOD 4KIT-S500DE 5N-SOAAA SN-lOON 5N-1 1OAA SN -2 7OAA SN -600AA SN-750AAE SN -500 SN-600AE SN-800AR SKIT- 1 200AE SKIT- 1 300SC SN- 1AOOSCR SKIT- 2000C SKR-A400D SKR-SOOODE 4850 48150 48200 48110 48225 48270 48600 48750 48500 48600 48800 481000 481200 48650 481000 481300 481400 481700 48 2000 48 2400 48 2800 48 4400 48 5000 6050 60150 60110 60270 60600 60750 60500 60600 60800 601200 601300 601400 60 2000 60 4400 60 SOQO DIMENSONS Price DH 3940591200 3941720150 4531122150 551650150 5511161200 5431945100 6501094150 8661016300 99211735710 8661654250 9921929400 12722362700 127235431500 5431945200 650642250 6001094250 6501604300 6501909300 8661654375 9921929450 127223621000 6421909300 8661016325 8661299350 8661654350 8661929450 9921173425 9921929650 127223621000 FREE Charae FLAT895 FLAT/SQUARE895 FLAT/SQUARE895 FLAT/SQUARE895 FLAT/SQUARE 1095 FLAT/SQUARE 895 FLAT/SQUARE 895 FLAT/SQUARE 1095 FLAT995 FLAT1095 FLAT/SQUARE 1200 FLAT/SQUARE 1500 FLAT/SQUARE 1600 SQUARE1400 FLAT/SQUARE 1600 FLAT/SQUARE 1200 FLAT/SQUARE 1600 FLAT/SQUARE 1800 FLAT/SQUARE 2000 FLAT/SQUARE 2200 FLAT/SQUARE 2600 FLAT/SQUARE 3400 FLAT/SQUARE 4200 FLAT1200 FLAT1200 FLAT1200 FLAT1200 FLAT1000 FLAT1250 FLAT1200 FLAT1500 FLAT1500 FLAT1900 FLAT1500 FLAT1900 FLAT2400 FLAT4000 FLAT5000 U WU rz lIEU U vz 8N600AA966001X8 AA 1800 8N600AA966002X2X2 high 2000 8N750AAE967501X8 AA 2200 8N7SOAAE967502X2X2 high 2200 6N-800AR72800FLAT2000 6KR-1300SC721300FLAT1800 7KR-13005C841300FLAT2000 6N-1A00SCR721400FLAT2200 7N-1A00SCIT841400FLAT2500 6KR-1700SCE721700FLAT2800 7KR-1700SCE841700FLAT3100 6KR-2000C722000FLAT3000 6KIT-4400D724400FLAT5000 6 Volt12AH81200 12 Volt60AH$1000 RO Oiants/deVries Continued page 62 information must specific point scattergun approaches must avoided subject well-defined contact National Air Space Museum Archive Division Room 3100 MRC 322 WashingtonDC 20560 few weeks printout what have bird will sent along ordering instructions course its going cost paper copies drawings microfilm reels information will well worth effort sincere thanks Brian good info RC SoaringlBlakeslee Continued page 63 aileron-equipped plane stable easier fly add drag reduce planes maneuverability Advanced pilots dont need training wheels lack bent up tips made possible increase aileron area roll response landing accuracy Couple flaps ailerons via computer radio some great aerobatics RG-15 airfoil once thought F3B speed airfoil thermals quite well lower wing loadings using camber control has excellent speed range think choice SD7037 RG-15 airfoil covers two best airfoils available thermal soaring fiberglass fuselage obechi-over-foam-core wings Makos construction straightforward typical current high-tech sailplanesbut no high-tech tools required Four wing-mounted servos operate flaps ailerons two fuselagemounted servos operate rudder stabilizer within slip-on nose cone two-panel wing incorporating wooden built-up spar Kevlar carbon fiber joined hardened steel rod obechi sheeting can applied stacking weight pressing between foam-core beds better using vacuum-bag system Foam-core full-flying stabs sheeted balsa obechi built-up rudder round out Makos construction am producing limited number Mako semikits kit contains fiberglass fuselage wing stab foam cores hardware Kevlar carbon fiber can order obechi veneer wing sheeting Daves Wood Products 12306 Bergstrasse Leavenworth WA 98826 Tel 509 548-5201 remaining bits balsa plywood probably lying around shop interested Mako semikit please write price Still documentation kickif need know about Northrop P-61 Black Widow let plug latest book ViP Publishers Inc PO Box 16103 Colorado Springs CO 80935 Dick Phillips yours truly have published Dave McLarens history big WW II night fighter 128-page book tells P-61 story along 70 photos threeview Widow book $1695 plus $250 postage handling working another McLaren book present subject North American F-82 Twin Mustang its various configurations Hope youre enjoying big bird flying season roximately $185RB] availability Ben Clerx 39 Seabrook Cove Newport Beach CA 92660 Mako flight report Roger Lackey want second opinion Mako slightly edited report found Plane Rap newsletter Harbor Soaring Society Pete Young editor Makos construction similar other planes its class its flying honestly best plane Ive ever flown Ive six other Open-class sailplanes flew very well because subtle differences engineered Mako outperforms What helps improve landings flat wing design tips-up planes can experience good amount polyhedral effect flying landing especially slight crosswind Mako s flat wings have very little tendency wallow around landings very crisp controlled Some people think flat wings susceptible tip-stalling just doesnt happen Mako couple times have turned too tightly low speeds has happened plane slipped little resumed flying fact plane gentle its third flight transmitter placed ground plane flew unassisted about minute before starting gentle bank right Thermaling plane very nice too wings signal lift extremely well light conditions feeding little camber really slows down climbs little trailing edge reflex helps penetration its no speed demon plane can still move out required Having flaps ailerons coupled slightly gives added roll authority allows nice tight aerobatics does launch Nice straight high doesnt want drop tip stall anything nasty just wants go up strong spar construction provides confidence go launch get top light downwind conditions Continued page 66 64 Model Aviation BATTERIES VISA MASTERCARD DISCOVER $400 SHIPPING & HANDLING 6% SALES TAX FOR FL RESIDENTS m five minutes can upgrade stan dard Futaba Airtronics servos ball bearing servos new EMS Ball Bearing Conversion Kit New case tops accurately molded supertough glass filled fuel-proof Celcon include top quality stainless steel ball bearing servo output shaft * Stops case top and/or plastic bushing wear * Prevents output gear shaft shimmy * Reduces friction improves servo centering * Enhances performance airplanes boats & cars Mandatory helicopter servos * Free output arm provided case top * Guaranteed against breakage year * pay $3995 $2995 BBC-1 Fits FUTABA 528/5 128 S38/S138 S48/S148 Servos set 4$2595 BBC-2As above set I$695 BBC-3Fits AIRTRONICS 94102 Servos set 4$2595 BBC-4As above set I$695 BBC-5Ball Bearing Only JR 501 507 RCDAPOLLO 05 10 FOCUS HS300 HS500 ACE 330342 342HS TOWER TS-5 Servos set 4$1995 Add $300 Shipping Handling orders nne714 692-1393 Info Onlycalifornia Residents Add 775% Sales Tax 800 845-8978 Orders OnlyVISA MASTERCARD Accepted 58 Engine $59500 42 Engine $52500 32 Engine $45000 26 Engine $45000 $1200 Shipping Engine Test Ran 503 938-6743 Fax 503 938-6950 Rt 3 Box 242-A Milton-Freewater OR 97862 RC SoaringlBlakeslee Continued page 64 after ultimate survival depends being guy top food chain National Soaring Museum dedication Paul Schweizer sent letter saying National Soaring Museum NSM located Elmira New York held dedication its Evolution Gliders Sailplanes Exhibit EOGASE May 21-22 exhibit includes 122 models gliders sailplanes illustrate develop ment soaring its beginning 1895 until 1990 Paul chairman NSM Exhibit Committee Along brothers Ernest William founded Schweizer Air craft Company way back 1938 Paul said NSM has great reports model exhibit model builders well some designers hand dedication Paul also reported NSM now has Barnaby-Klemperer exhibit SSA Soaring Convention Seattle last year has -scale models Prufling Barnaby flew Blaue Maus Klemperer flew models built Paul Gibson Craig Aho Bellevue Washington Paul said superb Prufling model built original plans 1000 building hours spent st Sailplaners visiting New York States southern tier should plan stopping see National Soaring Museum RD #3 Harris Hill Elmira NY 14903 Tel 607 734-3128 Jim Moynihans 1896 Chanute-Hemng hang glider Fran Ptaszkiewicz Tonawanda New York sent photo Jims model Chanute-Herrtng hang glider now part EOGASE exhibit mentioned above Fran also sent following letter March Jim Moynihan Don Hobel drove down NSM Elmira Jim could personally deliver model Chanute-Hemng hang glider EOGASE exhibit Jim master model craftsman par excellence Paul Schweizer asked Jim build model day itself fantastic Paul Schweizer himself greeted us museum door escorted us down floor museum model diorama located presentation made Jims model added exhibit Paul made reservations us have lunch him nearby restaurant least three-hour lunch talk course about models full-scale gliders Paul pointed out two brothers modelers years before formed glider company late 30s said lot information new designs gleaned Continued page 174 66 Model Aviation Yoroa Linda U POWER WALKER MACHINE SCALE DOCUMENTATION are/Antlque/Classic Aircraft lOOts photos tOte 3-views rareuniqoatone kind Osatisfaction guaranteed _________catalog $200 US tonde Golden kws Models 927Od CO 80226 dee f/4krx6oo1 Learn fly planes private field Five 6 day course $350 Open year round Send SASE complete info Southwest RC Flying 2818 Carolina NE Albuquerque NM 87110505-832-6394 Bob Fiorenzej Hobby Center Inc UPS Orders Shipped Doily Dealer Yellow Aircraft Send $300 Yellow Info Peckege z digit Showyoom 135 mtn Dig World Full Line Hobby Accessonea 420 West SR 434 Winter Springs FL 32708407 327-0353 RC SoaringlBlakeslee Continued page 66 free flight models after company up going interesting times have ever Following lunch returned museum met curator took us restoration storage areas gliders repaired held pending changes museum displays Meeting Schweizer brothers listening history unraveled fantastic experience say day interesting would give credit Making obechi-sheeted wings Because current popularity sheeted foam-core wings obechi wood veneer thought would good time pass along few tips Ive picked up Obechi splits very easily need careful handling cutting Apply masking tape over cut lines make cuts sharp scissors Next coat both sides sheet Flecto Diamond Finish Varathane seal wood use high-gloss variety apply foamtype brush applying Diamond Finish first side obechi will curl up like potato chip Just keep going best can Immediately coat other side will flatten right out Hang sheet up paper clamps dry finishing pre-sheeted obechi wings like ones come Shadow Thermal Eagle kits apply heavy first coat Diamond Finish Untreated obechi acts like blotterthe coating can soak down epoxy allow softened obechi pull away bond Apply light coat Diamond Finish paper towel thin coat will allow polymers cross-linking thing seal wood can come back heavier coats loosening bond Three five coats wet-sanding between will produce nice glossy finish use E-Z Lam laminating epoxy Aerospace Composites apply obechi foam cores can spread plastic squeegee foam roller Just thin coat thats required Tape trailing edges together masking tape before beginning epoxy application Vacuum-bagging best way go because produces perfectly pressure surfaces Most obechi will applied white foam cores should use about six inches mercury vacuum pressure six inches mercury will crush white foam Vacuum gauges read inches mercury psi Six inches mercury equals about three psi equivalent load 1320 pounds wing size Falcon 880 Try putting bricks bench Aerospace Composite Products E-Z Vac Composite Structures Technology Mighty Mini Vac vacuum pumps fine bagging obechi See manufacturers ads addresses pumps run continuously set six inches mercury available individually complete bagging kit includes pump bag material tubing breather felt fittings better deal kits dont come vacuum gauge can buy extra wish E-Z Vac kit also includes pair very nice Quick-Lock plastic clips used seal ends bag bag accurate wing must start perfectly flat working surface solidcore exterior door usually good bet can often buy slightly damaged local lumberyard good price After placing wet wing assembly bag top side up sealing run pump just long enough get air out bag bag film should contact wing no vacuum yet Shut off pump smooth wrinkles out bag Place bottom foam bed under bag top bed top bag Both beds must positioned exactly under/over wing core Felt-tip pen marks should have made both ends blank core cut Eyeball marks ensure beds aligned perfectly core put flat board top top bed few pounds extra weight spread along board will ensure whole assembly pressed down good contact flat work surface idea make sure everything flat straight before vacuum applied Once vacuum applied item bag will shapeforever everything looks okay turn pump let run least 12 hours temperature shop below about 72 24 hours better Epoxy takes couple weeks fully cure best let wings sit beds flat surface four five days before working Good luck Model Aviation er & Bnglne Power Free FlIght Display Control Une Blectric Power RIC AIrplanes new Illustrated 32 page tabloId sIze catelog US & Canade $100 Forelgh $300 Pertn Volley Hobby Center 837-A W Mom St Lanodole PA 19446 215 3654770 WORLDS LARGEST SCALE PLANS & DOcUMENTATION SERVICE 100000 AIRCRAFt PHOTOS PLANS ENLARGING 130 SCALE PLANS ze 120 PAGE CATALOG $500 USA & CANADA $1000 AIR OVtRStAS Jim Peptttoo E PLANS AND PHOTO SERVICE 3209 MADISON AVE GREENSBORO NC 27403 l2925239 COPUIERIED AIRCRAII PLIS Technical Illustrations Suitable Framing Scale Drafting Scanning Servicu S Views D-TECI4 SYSTEMS Shawrsee Trail CatalogCat-tervflls IL 62910 6189852383 COMPLETE RIT S3500SPORT OR COMBAT Wt%G KITS tj7rO GENE SUE WINGSPANci WPcGAOGonitscLJfl PRODUCTS 318 7475331 Comport 5Mflg Metols Booko Pocciojon Inotnusents LATHES complete Catalog 5200 CAMPBELL TOOLS Co 2tOOMSeIms Rood Spnngfield OH 43505 AfrcandVSeaOIocaser 322s362 Obechi Large Sheets Please call 809-548-5201 send SASE 12306 Bergatrasse Leavenworth WA 98826
Edition: Model Aviation - 1993/08
Page Numbers: 59, 60, 63, 64, 66, 174
RADIO CONTROL SOARING OUR US F3B TEAM will competing August 6-15 1993 biennial F3B World Championships multi-task soaring contest will held near Tel Aviv Israel team includes pilots Larry Jolly Daryl Perkins Randy Spencer Team manager 1977 F3B World Champ Skip Miller Joe Wurts won 1991 Champs Holland defending F3B World Champion Daryl Perkins placed second Holland US team finished third behind Germany Great Britain guys practicing hard take 1993 team win time team needs support American sailplaners Until F3J Thermal Duration Soaring World Champs held 1995 F3B international event RC soaring team needs raise funds H 10 MAKO Specifications Wing Span 1140 Wing Area 9480 sqin Aspect Ratio 137 Airfoil 7037 RG15 Weight 68 oz Wing Loading 103 oz/sqft Fuselage Fibergiass/Keviar Wings Obechi/Fosa Type Precision Duration Designed 8en Clerx 7/92 help defray transportation practice costs arc picked up AMA Team members have organized giant merchandise raffle tickets $5 also selling official team logo T-shirts M L XL XXL $15 pins $3 patches $5 stickers $2 Please add 10% merchandise total shipping handling merchandise order over $25 will receive free team pin Send check raffle tickets merchandise 1993 USA Soaring Team 15781 Empire Lane Westminster CA 92683 Building flying Shadow 118 Over winter built Shadow 118 glider designed Roger Chastain kitted Rogers company Tekoa Center Design Roger industrial designer n K S profession has used engineering experience add nice touches Shadow kit Shadows appearance reminds Falcon 880 its bigger Its 118-inch August1993 59 jim Moyfllflafl5 moaei OT 1~b unanuie Herring hang glider part EOGASE exhibit display National Soaring Museum Shadow 118 Open Class contest sailplane designed Roger Chastain threemeter-span ship thermal duration contest flying sport flying Shadow 118 kits pre-sheeted wings stabs rudder minimize building time Ben Clerx latest Mako Semikits available Ben 1, 2 K 3I/ h z 4 Left Three-view Mako latest design Ben Clerx Above Ben Clerx L Roger Lackey seem justly proud Makos Both guys belong Harbor Soaring Society southern California Interested Soaring Electric Flight Great So Are Northeast Sailplane Products carry comprehensive line silent flight prod ucts industry sell RIO Sail planes Electrics related accessories reference features hundreds products doz ens informative articles technical infor mation great sport RIO silent flight can meet needs abilities beginner expert dedicated pro viding personal customer service Check out NSP. youll glad did Welcome world NSP first open unique reference will awe number quality products have Also ordering us easy fun because help step way order reference mail $700 $5 plus $2 s&h NSP Well ship reference via express mail arent completely satisfied simply send back prompt courteous refund Northeast Sailplane Products 16 Kirby Lane Williston Vermont 05495 Northeast Sailplane Products 1993 RC Soaring Electric Reference N Price $5 Northeast Sailplane Products irby Lane Williston VT 05495 C802 658-9482 comprehensive reference Radio Control Soaring Electric Flight wingspan six inches longer Falcon wing area994 square inchesis well over 100 square inches greater Shadow uses todays popular thermal airfoil SD7037 Fuselage dimensions Shadow Falcon virtually identical Shadow kit first batch build-em-yourself obechi-over foam wings Current kits have prebuilt wings molded wing tips really good deal because much money save lot construction time end up lighter finished glider Shadow weighs 78 ounces giving dry wing loading 115 ounces per square foot pre-sheeted wing kits weigh about 70 ounces loading will right around 10 ounces per square foot should ideal dry wing loading low wind conditions Ballast can added fuselage wind picks up about 10 mph though Shadow didnt have pre-sheeted wings everything kit beautifully fabricated building instructions complete con structing wings took bit time actually interesting operation because got guts speak used F Z Lam epoxy bagged wings Theres about bagging obechi come no conventional spar wing brass joiner tube carried between -inch ply root rib /8-inch sub-rib six inches out spar tapered strips fairly heavy unidirectional carbon fibertwo top bottom dont know construction same used pre-sheeted kits Ive found wings super-stiff fuselage excellently formed fiberglass trimmed fit canopy Finishing fuselage conventional except Roger has make three little foam plugs hold pushrod tubes proper places along fuselage sides Thats good idea wing joiner V-inch-round 14inch-long piece high-strength 7075T-6 aluminum dihedral angle bent fit between joiner brass wing tubes perfect like shake assembled gliders see anything sounds loose Shadow doesnt rattle its solid respects first wondered about strength aluminum joiner its proven adequate Neither joiner nor wings show much deflection during launch fact Shadow about best launching plane Ive flown must happy combination towhook location wing stiffness airfoil etc ship wants climb straight up building instructions Roger mentions son Blayne prefers rearward towhook location first launch scared because soon model left hand took off straight up like kite strong wind instant visions old stall snap roll over trick didnt though Flying Shadow 118 lot fun As just mentioned launching can exciting really no sweat once get sticks Good zooms easy after learn tim ing full winch pedal dive/acceleration pull-up Off tow Shadow handles much like Falcon 880 except think its easier fly say easier mean once center gravity CG stab settings dialed Shadow overly critical pitch control couple clicks up down stab trim change flying speed bit dont make terribly dramatic difference plane performs Also additional size weight Shadow give momentum help keep going its pointed doesnt skitter around still shows clearly encounters lift Once lift Shadow excellent climber no problem staying cored coordinated thermal turns after aileron differential coupled rudder adjusted liking Just personal aside impression first flew heavier ships like Mueller Comet 89T reminded driving Cadillac Everything smooth stable solid Shadow gives some feeling too Continued page 63 60 Model Aviation oaringlBlakeslee Continued page 60 can sort motor around sky giving up lot altitude say lift-to-drag L/D ratio very good Since no free lunch what give up heavier ship ability float out early morning no-lift situations However 10 ounces per square foot pre-sheeted wing kit Shadow rates medium wing-loading glider should perfect conditions Landings pretty much same routine flapped ships key getting model slowed down establish ing glide angle/flap setting depends wind speed Low wind speeds require flap shallower final glide youre going too fast approaching spot Higher winds mean lower ground speed need less flap steeper glide angle penetrate spot Shadow behaves quite nicely landing pattern glide angle can easily adjusted flap stick its just matter lots practice get timing down all-important 100point precision spot landings computer radio strongly recom mended ship like Shadow because electronic mixing makes setting up flying lot easier Coupled flap/down-elevator compensation big help because flaps go down nose wants come up Up ailerons coupled down flapsthe crow configurationis another helpful option adds drag helps glider sink think Shadow 118 excellent choice all-around thermal contest ship glider just have fun Kits available $35995 exclusively Northeast Sailplane Products new two-meter version Shadow also available $27495 NSPs address 16 Kirby Lane Williston VT 05495 call 802 658-9482 Mako Ben Clerx Ben has Californias successful competition pilots Last year won hotly contested Fall Soaring Festival Visalia old Falcon 880 Ben has developing own designs over past few years latest version Mako very pretty bird good example current thinking California contest soaring scene Ben has switched obechi-sheeted foam wings Although such construction may high tech glass-bagged wings obechi works fine straight thermal ships because can built lighter quite serviceable Anyway its always instructive see what top guys doing because obviously spend lot time hobby always figure out best tricks before rest us Bens description new Mako Mako competition sailplane designed precision duration thermal contests F3J competition using slightly longer 118-inch wingspan retains crisp responsive handling characteristics F3B-type sailplane fourth version design series goes back 1987 con struction third version Dazzle too complex builders needed simplified glass-bagged wings $90 carbon-fiber spar system Construction Mako similar other competition sailplanes intended advanced-to-expert builder pilot main design objective have plane would easily max thermal duration requirements cover plenty ground search lift should also responsive aerobaticnot fight off boredom after skying out also improve all-important landing scores 5D7037 airfoil 10 22 ounces per square foot will give required flight times lightest lift conditions flat wing triple-tapered leading edge has no tip stalling tendency tracks though rails during landings particularly gusty winds Although polyhedral tips winglets make Continued page 64 August 1993 63 UFM Ultimate Fun Machine LEX Electric powered N/C ultra-light s-off stable anybody can fly mbles easily evening All prefabricated components No painting no sanding necessary Two kit versions available #31 74 Skyflex Basic Kit #3184 Skyflex electric power system prewired motor on/off switch Required inexpensive accessories 2-channel aircraft radio 7-cell nicad battery Battery charger see 93 Robbe catalog details lie 170 Township Line Road Belle Mead NJ 08502 908 359-2115 Call nearest Robbe Dealer N-200AAA2200 N-150N2150 N-11OAA2110 N-270AA2270 N-600AA2600 N-500A2500 N-6SOSC2650 KR-2000C2 2000 KR-AAOOD2 4400 OAAE2700 N 225AE2225 KR 600AE2600 KR 1000AEL21000 KR-1200AE21200 KR-1700SCE21700 KR-2400CE22400 N-600SCR12600 N-1000SCR12900 N-1AOOSCR121400 N-1500SCR121500 N-hOOCh121100 N-1800C1T121800 N-400000124000 - Specify Solder labs AN-SOAAA AN-i SON 4N-200AAA AN-i 1OAA AN-225AE 4N-270AA 4N-600AA 4 N-i SO-AAE AN-SOOA AN-600AE AN-800AR AKR-1000AE 4 KIT- 1 200AE N-650SC 4N-1000SCR 4KR-1300SC AN-i AOOSCR 4KR- 1 700SGE AKR-2000C AKR-2400CE 4KR-2800CE 4 KR-A AOOD 4KIT-S500DE 5N-SOAAA SN-lOON 5N-1 1OAA SN -2 7OAA SN -600AA SN-750AAE SN -500 SN-600AE SN-800AR SKIT- 1 200AE SKIT- 1 300SC SN- 1AOOSCR SKIT- 2000C SKR-A400D SKR-SOOODE 4850 48150 48200 48110 48225 48270 48600 48750 48500 48600 48800 481000 481200 48650 481000 481300 481400 481700 48 2000 48 2400 48 2800 48 4400 48 5000 6050 60150 60110 60270 60600 60750 60500 60600 60800 601200 601300 601400 60 2000 60 4400 60 SOQO DIMENSONS Price DH 3940591200 3941720150 4531122150 551650150 5511161200 5431945100 6501094150 8661016300 99211735710 8661654250 9921929400 12722362700 127235431500 5431945200 650642250 6001094250 6501604300 6501909300 8661654375 9921929450 127223621000 6421909300 8661016325 8661299350 8661654350 8661929450 9921173425 9921929650 127223621000 FREE Charae FLAT895 FLAT/SQUARE895 FLAT/SQUARE895 FLAT/SQUARE895 FLAT/SQUARE 1095 FLAT/SQUARE 895 FLAT/SQUARE 895 FLAT/SQUARE 1095 FLAT995 FLAT1095 FLAT/SQUARE 1200 FLAT/SQUARE 1500 FLAT/SQUARE 1600 SQUARE1400 FLAT/SQUARE 1600 FLAT/SQUARE 1200 FLAT/SQUARE 1600 FLAT/SQUARE 1800 FLAT/SQUARE 2000 FLAT/SQUARE 2200 FLAT/SQUARE 2600 FLAT/SQUARE 3400 FLAT/SQUARE 4200 FLAT1200 FLAT1200 FLAT1200 FLAT1200 FLAT1000 FLAT1250 FLAT1200 FLAT1500 FLAT1500 FLAT1900 FLAT1500 FLAT1900 FLAT2400 FLAT4000 FLAT5000 U WU rz lIEU U vz 8N600AA966001X8 AA 1800 8N600AA966002X2X2 high 2000 8N750AAE967501X8 AA 2200 8N7SOAAE967502X2X2 high 2200 6N-800AR72800FLAT2000 6KR-1300SC721300FLAT1800 7KR-13005C841300FLAT2000 6N-1A00SCR721400FLAT2200 7N-1A00SCIT841400FLAT2500 6KR-1700SCE721700FLAT2800 7KR-1700SCE841700FLAT3100 6KR-2000C722000FLAT3000 6KIT-4400D724400FLAT5000 6 Volt12AH81200 12 Volt60AH$1000 RO Oiants/deVries Continued page 62 information must specific point scattergun approaches must avoided subject well-defined contact National Air Space Museum Archive Division Room 3100 MRC 322 WashingtonDC 20560 few weeks printout what have bird will sent along ordering instructions course its going cost paper copies drawings microfilm reels information will well worth effort sincere thanks Brian good info RC SoaringlBlakeslee Continued page 63 aileron-equipped plane stable easier fly add drag reduce planes maneuverability Advanced pilots dont need training wheels lack bent up tips made possible increase aileron area roll response landing accuracy Couple flaps ailerons via computer radio some great aerobatics RG-15 airfoil once thought F3B speed airfoil thermals quite well lower wing loadings using camber control has excellent speed range think choice SD7037 RG-15 airfoil covers two best airfoils available thermal soaring fiberglass fuselage obechi-over-foam-core wings Makos construction straightforward typical current high-tech sailplanesbut no high-tech tools required Four wing-mounted servos operate flaps ailerons two fuselagemounted servos operate rudder stabilizer within slip-on nose cone two-panel wing incorporating wooden built-up spar Kevlar carbon fiber joined hardened steel rod obechi sheeting can applied stacking weight pressing between foam-core beds better using vacuum-bag system Foam-core full-flying stabs sheeted balsa obechi built-up rudder round out Makos construction am producing limited number Mako semikits kit contains fiberglass fuselage wing stab foam cores hardware Kevlar carbon fiber can order obechi veneer wing sheeting Daves Wood Products 12306 Bergstrasse Leavenworth WA 98826 Tel 509 548-5201 remaining bits balsa plywood probably lying around shop interested Mako semikit please write price Still documentation kickif need know about Northrop P-61 Black Widow let plug latest book ViP Publishers Inc PO Box 16103 Colorado Springs CO 80935 Dick Phillips yours truly have published Dave McLarens history big WW II night fighter 128-page book tells P-61 story along 70 photos threeview Widow book $1695 plus $250 postage handling working another McLaren book present subject North American F-82 Twin Mustang its various configurations Hope youre enjoying big bird flying season roximately $185RB] availability Ben Clerx 39 Seabrook Cove Newport Beach CA 92660 Mako flight report Roger Lackey want second opinion Mako slightly edited report found Plane Rap newsletter Harbor Soaring Society Pete Young editor Makos construction similar other planes its class its flying honestly best plane Ive ever flown Ive six other Open-class sailplanes flew very well because subtle differences engineered Mako outperforms What helps improve landings flat wing design tips-up planes can experience good amount polyhedral effect flying landing especially slight crosswind Mako s flat wings have very little tendency wallow around landings very crisp controlled Some people think flat wings susceptible tip-stalling just doesnt happen Mako couple times have turned too tightly low speeds has happened plane slipped little resumed flying fact plane gentle its third flight transmitter placed ground plane flew unassisted about minute before starting gentle bank right Thermaling plane very nice too wings signal lift extremely well light conditions feeding little camber really slows down climbs little trailing edge reflex helps penetration its no speed demon plane can still move out required Having flaps ailerons coupled slightly gives added roll authority allows nice tight aerobatics does launch Nice straight high doesnt want drop tip stall anything nasty just wants go up strong spar construction provides confidence go launch get top light downwind conditions Continued page 66 64 Model Aviation BATTERIES VISA MASTERCARD DISCOVER $400 SHIPPING & HANDLING 6% SALES TAX FOR FL RESIDENTS m five minutes can upgrade stan dard Futaba Airtronics servos ball bearing servos new EMS Ball Bearing Conversion Kit New case tops accurately molded supertough glass filled fuel-proof Celcon include top quality stainless steel ball bearing servo output shaft * Stops case top and/or plastic bushing wear * Prevents output gear shaft shimmy * Reduces friction improves servo centering * Enhances performance airplanes boats & cars Mandatory helicopter servos * Free output arm provided case top * Guaranteed against breakage year * pay $3995 $2995 BBC-1 Fits FUTABA 528/5 128 S38/S138 S48/S148 Servos set 4$2595 BBC-2As above set I$695 BBC-3Fits AIRTRONICS 94102 Servos set 4$2595 BBC-4As above set I$695 BBC-5Ball Bearing Only JR 501 507 RCDAPOLLO 05 10 FOCUS HS300 HS500 ACE 330342 342HS TOWER TS-5 Servos set 4$1995 Add $300 Shipping Handling orders nne714 692-1393 Info Onlycalifornia Residents Add 775% Sales Tax 800 845-8978 Orders OnlyVISA MASTERCARD Accepted 58 Engine $59500 42 Engine $52500 32 Engine $45000 26 Engine $45000 $1200 Shipping Engine Test Ran 503 938-6743 Fax 503 938-6950 Rt 3 Box 242-A Milton-Freewater OR 97862 RC SoaringlBlakeslee Continued page 64 after ultimate survival depends being guy top food chain National Soaring Museum dedication Paul Schweizer sent letter saying National Soaring Museum NSM located Elmira New York held dedication its Evolution Gliders Sailplanes Exhibit EOGASE May 21-22 exhibit includes 122 models gliders sailplanes illustrate develop ment soaring its beginning 1895 until 1990 Paul chairman NSM Exhibit Committee Along brothers Ernest William founded Schweizer Air craft Company way back 1938 Paul said NSM has great reports model exhibit model builders well some designers hand dedication Paul also reported NSM now has Barnaby-Klemperer exhibit SSA Soaring Convention Seattle last year has -scale models Prufling Barnaby flew Blaue Maus Klemperer flew models built Paul Gibson Craig Aho Bellevue Washington Paul said superb Prufling model built original plans 1000 building hours spent st Sailplaners visiting New York States southern tier should plan stopping see National Soaring Museum RD #3 Harris Hill Elmira NY 14903 Tel 607 734-3128 Jim Moynihans 1896 Chanute-Hemng hang glider Fran Ptaszkiewicz Tonawanda New York sent photo Jims model Chanute-Herrtng hang glider now part EOGASE exhibit mentioned above Fran also sent following letter March Jim Moynihan Don Hobel drove down NSM Elmira Jim could personally deliver model Chanute-Hemng hang glider EOGASE exhibit Jim master model craftsman par excellence Paul Schweizer asked Jim build model day itself fantastic Paul Schweizer himself greeted us museum door escorted us down floor museum model diorama located presentation made Jims model added exhibit Paul made reservations us have lunch him nearby restaurant least three-hour lunch talk course about models full-scale gliders Paul pointed out two brothers modelers years before formed glider company late 30s said lot information new designs gleaned Continued page 174 66 Model Aviation Yoroa Linda U POWER WALKER MACHINE SCALE DOCUMENTATION are/Antlque/Classic Aircraft lOOts photos tOte 3-views rareuniqoatone kind Osatisfaction guaranteed _________catalog $200 US tonde Golden kws Models 927Od CO 80226 dee f/4krx6oo1 Learn fly planes private field Five 6 day course $350 Open year round Send SASE complete info Southwest RC Flying 2818 Carolina NE Albuquerque NM 87110505-832-6394 Bob Fiorenzej Hobby Center Inc UPS Orders Shipped Doily Dealer Yellow Aircraft Send $300 Yellow Info Peckege z digit Showyoom 135 mtn Dig World Full Line Hobby Accessonea 420 West SR 434 Winter Springs FL 32708407 327-0353 RC SoaringlBlakeslee Continued page 66 free flight models after company up going interesting times have ever Following lunch returned museum met curator took us restoration storage areas gliders repaired held pending changes museum displays Meeting Schweizer brothers listening history unraveled fantastic experience say day interesting would give credit Making obechi-sheeted wings Because current popularity sheeted foam-core wings obechi wood veneer thought would good time pass along few tips Ive picked up Obechi splits very easily need careful handling cutting Apply masking tape over cut lines make cuts sharp scissors Next coat both sides sheet Flecto Diamond Finish Varathane seal wood use high-gloss variety apply foamtype brush applying Diamond Finish first side obechi will curl up like potato chip Just keep going best can Immediately coat other side will flatten right out Hang sheet up paper clamps dry finishing pre-sheeted obechi wings like ones come Shadow Thermal Eagle kits apply heavy first coat Diamond Finish Untreated obechi acts like blotterthe coating can soak down epoxy allow softened obechi pull away bond Apply light coat Diamond Finish paper towel thin coat will allow polymers cross-linking thing seal wood can come back heavier coats loosening bond Three five coats wet-sanding between will produce nice glossy finish use E-Z Lam laminating epoxy Aerospace Composites apply obechi foam cores can spread plastic squeegee foam roller Just thin coat thats required Tape trailing edges together masking tape before beginning epoxy application Vacuum-bagging best way go because produces perfectly pressure surfaces Most obechi will applied white foam cores should use about six inches mercury vacuum pressure six inches mercury will crush white foam Vacuum gauges read inches mercury psi Six inches mercury equals about three psi equivalent load 1320 pounds wing size Falcon 880 Try putting bricks bench Aerospace Composite Products E-Z Vac Composite Structures Technology Mighty Mini Vac vacuum pumps fine bagging obechi See manufacturers ads addresses pumps run continuously set six inches mercury available individually complete bagging kit includes pump bag material tubing breather felt fittings better deal kits dont come vacuum gauge can buy extra wish E-Z Vac kit also includes pair very nice Quick-Lock plastic clips used seal ends bag bag accurate wing must start perfectly flat working surface solidcore exterior door usually good bet can often buy slightly damaged local lumberyard good price After placing wet wing assembly bag top side up sealing run pump just long enough get air out bag bag film should contact wing no vacuum yet Shut off pump smooth wrinkles out bag Place bottom foam bed under bag top bed top bag Both beds must positioned exactly under/over wing core Felt-tip pen marks should have made both ends blank core cut Eyeball marks ensure beds aligned perfectly core put flat board top top bed few pounds extra weight spread along board will ensure whole assembly pressed down good contact flat work surface idea make sure everything flat straight before vacuum applied Once vacuum applied item bag will shapeforever everything looks okay turn pump let run least 12 hours temperature shop below about 72 24 hours better Epoxy takes couple weeks fully cure best let wings sit beds flat surface four five days before working Good luck Model Aviation er & Bnglne Power Free FlIght Display Control Une Blectric Power RIC AIrplanes new Illustrated 32 page tabloId sIze catelog US & Canade $100 Forelgh $300 Pertn Volley Hobby Center 837-A W Mom St Lanodole PA 19446 215 3654770 WORLDS LARGEST SCALE PLANS & DOcUMENTATION SERVICE 100000 AIRCRAFt PHOTOS PLANS ENLARGING 130 SCALE PLANS ze 120 PAGE CATALOG $500 USA & CANADA $1000 AIR OVtRStAS Jim Peptttoo E PLANS AND PHOTO SERVICE 3209 MADISON AVE GREENSBORO NC 27403 l2925239 COPUIERIED AIRCRAII PLIS Technical Illustrations Suitable Framing Scale Drafting Scanning Servicu S Views D-TECI4 SYSTEMS Shawrsee Trail CatalogCat-tervflls IL 62910 6189852383 COMPLETE RIT S3500SPORT OR COMBAT Wt%G KITS tj7rO GENE SUE WINGSPANci WPcGAOGonitscLJfl PRODUCTS 318 7475331 Comport 5Mflg Metols Booko Pocciojon Inotnusents LATHES complete Catalog 5200 CAMPBELL TOOLS Co 2tOOMSeIms Rood Spnngfield OH 43505 AfrcandVSeaOIocaser 322s362 Obechi Large Sheets Please call 809-548-5201 send SASE 12306 Bergatrasse Leavenworth WA 98826
Edition: Model Aviation - 1993/08
Page Numbers: 59, 60, 63, 64, 66, 174
RADIO CONTROL SOARING OUR US F3B TEAM will competing August 6-15 1993 biennial F3B World Championships multi-task soaring contest will held near Tel Aviv Israel team includes pilots Larry Jolly Daryl Perkins Randy Spencer Team manager 1977 F3B World Champ Skip Miller Joe Wurts won 1991 Champs Holland defending F3B World Champion Daryl Perkins placed second Holland US team finished third behind Germany Great Britain guys practicing hard take 1993 team win time team needs support American sailplaners Until F3J Thermal Duration Soaring World Champs held 1995 F3B international event RC soaring team needs raise funds H 10 MAKO Specifications Wing Span 1140 Wing Area 9480 sqin Aspect Ratio 137 Airfoil 7037 RG15 Weight 68 oz Wing Loading 103 oz/sqft Fuselage Fibergiass/Keviar Wings Obechi/Fosa Type Precision Duration Designed 8en Clerx 7/92 help defray transportation practice costs arc picked up AMA Team members have organized giant merchandise raffle tickets $5 also selling official team logo T-shirts M L XL XXL $15 pins $3 patches $5 stickers $2 Please add 10% merchandise total shipping handling merchandise order over $25 will receive free team pin Send check raffle tickets merchandise 1993 USA Soaring Team 15781 Empire Lane Westminster CA 92683 Building flying Shadow 118 Over winter built Shadow 118 glider designed Roger Chastain kitted Rogers company Tekoa Center Design Roger industrial designer n K S profession has used engineering experience add nice touches Shadow kit Shadows appearance reminds Falcon 880 its bigger Its 118-inch August1993 59 jim Moyfllflafl5 moaei OT 1~b unanuie Herring hang glider part EOGASE exhibit display National Soaring Museum Shadow 118 Open Class contest sailplane designed Roger Chastain threemeter-span ship thermal duration contest flying sport flying Shadow 118 kits pre-sheeted wings stabs rudder minimize building time Ben Clerx latest Mako Semikits available Ben 1, 2 K 3I/ h z 4 Left Three-view Mako latest design Ben Clerx Above Ben Clerx L Roger Lackey seem justly proud Makos Both guys belong Harbor Soaring Society southern California Interested Soaring Electric Flight Great So Are Northeast Sailplane Products carry comprehensive line silent flight prod ucts industry sell RIO Sail planes Electrics related accessories reference features hundreds products doz ens informative articles technical infor mation great sport RIO silent flight can meet needs abilities beginner expert dedicated pro viding personal customer service Check out NSP. youll glad did Welcome world NSP first open unique reference will awe number quality products have Also ordering us easy fun because help step way order reference mail $700 $5 plus $2 s&h NSP Well ship reference via express mail arent completely satisfied simply send back prompt courteous refund Northeast Sailplane Products 16 Kirby Lane Williston Vermont 05495 Northeast Sailplane Products 1993 RC Soaring Electric Reference N Price $5 Northeast Sailplane Products irby Lane Williston VT 05495 C802 658-9482 comprehensive reference Radio Control Soaring Electric Flight wingspan six inches longer Falcon wing area994 square inchesis well over 100 square inches greater Shadow uses todays popular thermal airfoil SD7037 Fuselage dimensions Shadow Falcon virtually identical Shadow kit first batch build-em-yourself obechi-over foam wings Current kits have prebuilt wings molded wing tips really good deal because much money save lot construction time end up lighter finished glider Shadow weighs 78 ounces giving dry wing loading 115 ounces per square foot pre-sheeted wing kits weigh about 70 ounces loading will right around 10 ounces per square foot should ideal dry wing loading low wind conditions Ballast can added fuselage wind picks up about 10 mph though Shadow didnt have pre-sheeted wings everything kit beautifully fabricated building instructions complete con structing wings took bit time actually interesting operation because got guts speak used F Z Lam epoxy bagged wings Theres about bagging obechi come no conventional spar wing brass joiner tube carried between -inch ply root rib /8-inch sub-rib six inches out spar tapered strips fairly heavy unidirectional carbon fibertwo top bottom dont know construction same used pre-sheeted kits Ive found wings super-stiff fuselage excellently formed fiberglass trimmed fit canopy Finishing fuselage conventional except Roger has make three little foam plugs hold pushrod tubes proper places along fuselage sides Thats good idea wing joiner V-inch-round 14inch-long piece high-strength 7075T-6 aluminum dihedral angle bent fit between joiner brass wing tubes perfect like shake assembled gliders see anything sounds loose Shadow doesnt rattle its solid respects first wondered about strength aluminum joiner its proven adequate Neither joiner nor wings show much deflection during launch fact Shadow about best launching plane Ive flown must happy combination towhook location wing stiffness airfoil etc ship wants climb straight up building instructions Roger mentions son Blayne prefers rearward towhook location first launch scared because soon model left hand took off straight up like kite strong wind instant visions old stall snap roll over trick didnt though Flying Shadow 118 lot fun As just mentioned launching can exciting really no sweat once get sticks Good zooms easy after learn tim ing full winch pedal dive/acceleration pull-up Off tow Shadow handles much like Falcon 880 except think its easier fly say easier mean once center gravity CG stab settings dialed Shadow overly critical pitch control couple clicks up down stab trim change flying speed bit dont make terribly dramatic difference plane performs Also additional size weight Shadow give momentum help keep going its pointed doesnt skitter around still shows clearly encounters lift Once lift Shadow excellent climber no problem staying cored coordinated thermal turns after aileron differential coupled rudder adjusted liking Just personal aside impression first flew heavier ships like Mueller Comet 89T reminded driving Cadillac Everything smooth stable solid Shadow gives some feeling too Continued page 63 60 Model Aviation oaringlBlakeslee Continued page 60 can sort motor around sky giving up lot altitude say lift-to-drag L/D ratio very good Since no free lunch what give up heavier ship ability float out early morning no-lift situations However 10 ounces per square foot pre-sheeted wing kit Shadow rates medium wing-loading glider should perfect conditions Landings pretty much same routine flapped ships key getting model slowed down establish ing glide angle/flap setting depends wind speed Low wind speeds require flap shallower final glide youre going too fast approaching spot Higher winds mean lower ground speed need less flap steeper glide angle penetrate spot Shadow behaves quite nicely landing pattern glide angle can easily adjusted flap stick its just matter lots practice get timing down all-important 100point precision spot landings computer radio strongly recom mended ship like Shadow because electronic mixing makes setting up flying lot easier Coupled flap/down-elevator compensation big help because flaps go down nose wants come up Up ailerons coupled down flapsthe crow configurationis another helpful option adds drag helps glider sink think Shadow 118 excellent choice all-around thermal contest ship glider just have fun Kits available $35995 exclusively Northeast Sailplane Products new two-meter version Shadow also available $27495 NSPs address 16 Kirby Lane Williston VT 05495 call 802 658-9482 Mako Ben Clerx Ben has Californias successful competition pilots Last year won hotly contested Fall Soaring Festival Visalia old Falcon 880 Ben has developing own designs over past few years latest version Mako very pretty bird good example current thinking California contest soaring scene Ben has switched obechi-sheeted foam wings Although such construction may high tech glass-bagged wings obechi works fine straight thermal ships because can built lighter quite serviceable Anyway its always instructive see what top guys doing because obviously spend lot time hobby always figure out best tricks before rest us Bens description new Mako Mako competition sailplane designed precision duration thermal contests F3J competition using slightly longer 118-inch wingspan retains crisp responsive handling characteristics F3B-type sailplane fourth version design series goes back 1987 con struction third version Dazzle too complex builders needed simplified glass-bagged wings $90 carbon-fiber spar system Construction Mako similar other competition sailplanes intended advanced-to-expert builder pilot main design objective have plane would easily max thermal duration requirements cover plenty ground search lift should also responsive aerobaticnot fight off boredom after skying out also improve all-important landing scores 5D7037 airfoil 10 22 ounces per square foot will give required flight times lightest lift conditions flat wing triple-tapered leading edge has no tip stalling tendency tracks though rails during landings particularly gusty winds Although polyhedral tips winglets make Continued page 64 August 1993 63 UFM Ultimate Fun Machine LEX Electric powered N/C ultra-light s-off stable anybody can fly mbles easily evening All prefabricated components No painting no sanding necessary Two kit versions available #31 74 Skyflex Basic Kit #3184 Skyflex electric power system prewired motor on/off switch Required inexpensive accessories 2-channel aircraft radio 7-cell nicad battery Battery charger see 93 Robbe catalog details lie 170 Township Line Road Belle Mead NJ 08502 908 359-2115 Call nearest Robbe Dealer N-200AAA2200 N-150N2150 N-11OAA2110 N-270AA2270 N-600AA2600 N-500A2500 N-6SOSC2650 KR-2000C2 2000 KR-AAOOD2 4400 OAAE2700 N 225AE2225 KR 600AE2600 KR 1000AEL21000 KR-1200AE21200 KR-1700SCE21700 KR-2400CE22400 N-600SCR12600 N-1000SCR12900 N-1AOOSCR121400 N-1500SCR121500 N-hOOCh121100 N-1800C1T121800 N-400000124000 - Specify Solder labs AN-SOAAA AN-i SON 4N-200AAA AN-i 1OAA AN-225AE 4N-270AA 4N-600AA 4 N-i SO-AAE AN-SOOA AN-600AE AN-800AR AKR-1000AE 4 KIT- 1 200AE N-650SC 4N-1000SCR 4KR-1300SC AN-i AOOSCR 4KR- 1 700SGE AKR-2000C AKR-2400CE 4KR-2800CE 4 KR-A AOOD 4KIT-S500DE 5N-SOAAA SN-lOON 5N-1 1OAA SN -2 7OAA SN -600AA SN-750AAE SN -500 SN-600AE SN-800AR SKIT- 1 200AE SKIT- 1 300SC SN- 1AOOSCR SKIT- 2000C SKR-A400D SKR-SOOODE 4850 48150 48200 48110 48225 48270 48600 48750 48500 48600 48800 481000 481200 48650 481000 481300 481400 481700 48 2000 48 2400 48 2800 48 4400 48 5000 6050 60150 60110 60270 60600 60750 60500 60600 60800 601200 601300 601400 60 2000 60 4400 60 SOQO DIMENSONS Price DH 3940591200 3941720150 4531122150 551650150 5511161200 5431945100 6501094150 8661016300 99211735710 8661654250 9921929400 12722362700 127235431500 5431945200 650642250 6001094250 6501604300 6501909300 8661654375 9921929450 127223621000 6421909300 8661016325 8661299350 8661654350 8661929450 9921173425 9921929650 127223621000 FREE Charae FLAT895 FLAT/SQUARE895 FLAT/SQUARE895 FLAT/SQUARE895 FLAT/SQUARE 1095 FLAT/SQUARE 895 FLAT/SQUARE 895 FLAT/SQUARE 1095 FLAT995 FLAT1095 FLAT/SQUARE 1200 FLAT/SQUARE 1500 FLAT/SQUARE 1600 SQUARE1400 FLAT/SQUARE 1600 FLAT/SQUARE 1200 FLAT/SQUARE 1600 FLAT/SQUARE 1800 FLAT/SQUARE 2000 FLAT/SQUARE 2200 FLAT/SQUARE 2600 FLAT/SQUARE 3400 FLAT/SQUARE 4200 FLAT1200 FLAT1200 FLAT1200 FLAT1200 FLAT1000 FLAT1250 FLAT1200 FLAT1500 FLAT1500 FLAT1900 FLAT1500 FLAT1900 FLAT2400 FLAT4000 FLAT5000 U WU rz lIEU U vz 8N600AA966001X8 AA 1800 8N600AA966002X2X2 high 2000 8N750AAE967501X8 AA 2200 8N7SOAAE967502X2X2 high 2200 6N-800AR72800FLAT2000 6KR-1300SC721300FLAT1800 7KR-13005C841300FLAT2000 6N-1A00SCR721400FLAT2200 7N-1A00SCIT841400FLAT2500 6KR-1700SCE721700FLAT2800 7KR-1700SCE841700FLAT3100 6KR-2000C722000FLAT3000 6KIT-4400D724400FLAT5000 6 Volt12AH81200 12 Volt60AH$1000 RO Oiants/deVries Continued page 62 information must specific point scattergun approaches must avoided subject well-defined contact National Air Space Museum Archive Division Room 3100 MRC 322 WashingtonDC 20560 few weeks printout what have bird will sent along ordering instructions course its going cost paper copies drawings microfilm reels information will well worth effort sincere thanks Brian good info RC SoaringlBlakeslee Continued page 63 aileron-equipped plane stable easier fly add drag reduce planes maneuverability Advanced pilots dont need training wheels lack bent up tips made possible increase aileron area roll response landing accuracy Couple flaps ailerons via computer radio some great aerobatics RG-15 airfoil once thought F3B speed airfoil thermals quite well lower wing loadings using camber control has excellent speed range think choice SD7037 RG-15 airfoil covers two best airfoils available thermal soaring fiberglass fuselage obechi-over-foam-core wings Makos construction straightforward typical current high-tech sailplanesbut no high-tech tools required Four wing-mounted servos operate flaps ailerons two fuselagemounted servos operate rudder stabilizer within slip-on nose cone two-panel wing incorporating wooden built-up spar Kevlar carbon fiber joined hardened steel rod obechi sheeting can applied stacking weight pressing between foam-core beds better using vacuum-bag system Foam-core full-flying stabs sheeted balsa obechi built-up rudder round out Makos construction am producing limited number Mako semikits kit contains fiberglass fuselage wing stab foam cores hardware Kevlar carbon fiber can order obechi veneer wing sheeting Daves Wood Products 12306 Bergstrasse Leavenworth WA 98826 Tel 509 548-5201 remaining bits balsa plywood probably lying around shop interested Mako semikit please write price Still documentation kickif need know about Northrop P-61 Black Widow let plug latest book ViP Publishers Inc PO Box 16103 Colorado Springs CO 80935 Dick Phillips yours truly have published Dave McLarens history big WW II night fighter 128-page book tells P-61 story along 70 photos threeview Widow book $1695 plus $250 postage handling working another McLaren book present subject North American F-82 Twin Mustang its various configurations Hope youre enjoying big bird flying season roximately $185RB] availability Ben Clerx 39 Seabrook Cove Newport Beach CA 92660 Mako flight report Roger Lackey want second opinion Mako slightly edited report found Plane Rap newsletter Harbor Soaring Society Pete Young editor Makos construction similar other planes its class its flying honestly best plane Ive ever flown Ive six other Open-class sailplanes flew very well because subtle differences engineered Mako outperforms What helps improve landings flat wing design tips-up planes can experience good amount polyhedral effect flying landing especially slight crosswind Mako s flat wings have very little tendency wallow around landings very crisp controlled Some people think flat wings susceptible tip-stalling just doesnt happen Mako couple times have turned too tightly low speeds has happened plane slipped little resumed flying fact plane gentle its third flight transmitter placed ground plane flew unassisted about minute before starting gentle bank right Thermaling plane very nice too wings signal lift extremely well light conditions feeding little camber really slows down climbs little trailing edge reflex helps penetration its no speed demon plane can still move out required Having flaps ailerons coupled slightly gives added roll authority allows nice tight aerobatics does launch Nice straight high doesnt want drop tip stall anything nasty just wants go up strong spar construction provides confidence go launch get top light downwind conditions Continued page 66 64 Model Aviation BATTERIES VISA MASTERCARD DISCOVER $400 SHIPPING & HANDLING 6% SALES TAX FOR FL RESIDENTS m five minutes can upgrade stan dard Futaba Airtronics servos ball bearing servos new EMS Ball Bearing Conversion Kit New case tops accurately molded supertough glass filled fuel-proof Celcon include top quality stainless steel ball bearing servo output shaft * Stops case top and/or plastic bushing wear * Prevents output gear shaft shimmy * Reduces friction improves servo centering * Enhances performance airplanes boats & cars Mandatory helicopter servos * Free output arm provided case top * Guaranteed against breakage year * pay $3995 $2995 BBC-1 Fits FUTABA 528/5 128 S38/S138 S48/S148 Servos set 4$2595 BBC-2As above set I$695 BBC-3Fits AIRTRONICS 94102 Servos set 4$2595 BBC-4As above set I$695 BBC-5Ball Bearing Only JR 501 507 RCDAPOLLO 05 10 FOCUS HS300 HS500 ACE 330342 342HS TOWER TS-5 Servos set 4$1995 Add $300 Shipping Handling orders nne714 692-1393 Info Onlycalifornia Residents Add 775% Sales Tax 800 845-8978 Orders OnlyVISA MASTERCARD Accepted 58 Engine $59500 42 Engine $52500 32 Engine $45000 26 Engine $45000 $1200 Shipping Engine Test Ran 503 938-6743 Fax 503 938-6950 Rt 3 Box 242-A Milton-Freewater OR 97862 RC SoaringlBlakeslee Continued page 64 after ultimate survival depends being guy top food chain National Soaring Museum dedication Paul Schweizer sent letter saying National Soaring Museum NSM located Elmira New York held dedication its Evolution Gliders Sailplanes Exhibit EOGASE May 21-22 exhibit includes 122 models gliders sailplanes illustrate develop ment soaring its beginning 1895 until 1990 Paul chairman NSM Exhibit Committee Along brothers Ernest William founded Schweizer Air craft Company way back 1938 Paul said NSM has great reports model exhibit model builders well some designers hand dedication Paul also reported NSM now has Barnaby-Klemperer exhibit SSA Soaring Convention Seattle last year has -scale models Prufling Barnaby flew Blaue Maus Klemperer flew models built Paul Gibson Craig Aho Bellevue Washington Paul said superb Prufling model built original plans 1000 building hours spent st Sailplaners visiting New York States southern tier should plan stopping see National Soaring Museum RD #3 Harris Hill Elmira NY 14903 Tel 607 734-3128 Jim Moynihans 1896 Chanute-Hemng hang glider Fran Ptaszkiewicz Tonawanda New York sent photo Jims model Chanute-Herrtng hang glider now part EOGASE exhibit mentioned above Fran also sent following letter March Jim Moynihan Don Hobel drove down NSM Elmira Jim could personally deliver model Chanute-Hemng hang glider EOGASE exhibit Jim master model craftsman par excellence Paul Schweizer asked Jim build model day itself fantastic Paul Schweizer himself greeted us museum door escorted us down floor museum model diorama located presentation made Jims model added exhibit Paul made reservations us have lunch him nearby restaurant least three-hour lunch talk course about models full-scale gliders Paul pointed out two brothers modelers years before formed glider company late 30s said lot information new designs gleaned Continued page 174 66 Model Aviation Yoroa Linda U POWER WALKER MACHINE SCALE DOCUMENTATION are/Antlque/Classic Aircraft lOOts photos tOte 3-views rareuniqoatone kind Osatisfaction guaranteed _________catalog $200 US tonde Golden kws Models 927Od CO 80226 dee f/4krx6oo1 Learn fly planes private field Five 6 day course $350 Open year round Send SASE complete info Southwest RC Flying 2818 Carolina NE Albuquerque NM 87110505-832-6394 Bob Fiorenzej Hobby Center Inc UPS Orders Shipped Doily Dealer Yellow Aircraft Send $300 Yellow Info Peckege z digit Showyoom 135 mtn Dig World Full Line Hobby Accessonea 420 West SR 434 Winter Springs FL 32708407 327-0353 RC SoaringlBlakeslee Continued page 66 free flight models after company up going interesting times have ever Following lunch returned museum met curator took us restoration storage areas gliders repaired held pending changes museum displays Meeting Schweizer brothers listening history unraveled fantastic experience say day interesting would give credit Making obechi-sheeted wings Because current popularity sheeted foam-core wings obechi wood veneer thought would good time pass along few tips Ive picked up Obechi splits very easily need careful handling cutting Apply masking tape over cut lines make cuts sharp scissors Next coat both sides sheet Flecto Diamond Finish Varathane seal wood use high-gloss variety apply foamtype brush applying Diamond Finish first side obechi will curl up like potato chip Just keep going best can Immediately coat other side will flatten right out Hang sheet up paper clamps dry finishing pre-sheeted obechi wings like ones come Shadow Thermal Eagle kits apply heavy first coat Diamond Finish Untreated obechi acts like blotterthe coating can soak down epoxy allow softened obechi pull away bond Apply light coat Diamond Finish paper towel thin coat will allow polymers cross-linking thing seal wood can come back heavier coats loosening bond Three five coats wet-sanding between will produce nice glossy finish use E-Z Lam laminating epoxy Aerospace Composites apply obechi foam cores can spread plastic squeegee foam roller Just thin coat thats required Tape trailing edges together masking tape before beginning epoxy application Vacuum-bagging best way go because produces perfectly pressure surfaces Most obechi will applied white foam cores should use about six inches mercury vacuum pressure six inches mercury will crush white foam Vacuum gauges read inches mercury psi Six inches mercury equals about three psi equivalent load 1320 pounds wing size Falcon 880 Try putting bricks bench Aerospace Composite Products E-Z Vac Composite Structures Technology Mighty Mini Vac vacuum pumps fine bagging obechi See manufacturers ads addresses pumps run continuously set six inches mercury available individually complete bagging kit includes pump bag material tubing breather felt fittings better deal kits dont come vacuum gauge can buy extra wish E-Z Vac kit also includes pair very nice Quick-Lock plastic clips used seal ends bag bag accurate wing must start perfectly flat working surface solidcore exterior door usually good bet can often buy slightly damaged local lumberyard good price After placing wet wing assembly bag top side up sealing run pump just long enough get air out bag bag film should contact wing no vacuum yet Shut off pump smooth wrinkles out bag Place bottom foam bed under bag top bed top bag Both beds must positioned exactly under/over wing core Felt-tip pen marks should have made both ends blank core cut Eyeball marks ensure beds aligned perfectly core put flat board top top bed few pounds extra weight spread along board will ensure whole assembly pressed down good contact flat work surface idea make sure everything flat straight before vacuum applied Once vacuum applied item bag will shapeforever everything looks okay turn pump let run least 12 hours temperature shop below about 72 24 hours better Epoxy takes couple weeks fully cure best let wings sit beds flat surface four five days before working Good luck Model Aviation er & Bnglne Power Free FlIght Display Control Une Blectric Power RIC AIrplanes new Illustrated 32 page tabloId sIze catelog US & Canade $100 Forelgh $300 Pertn Volley Hobby Center 837-A W Mom St Lanodole PA 19446 215 3654770 WORLDS LARGEST SCALE PLANS & DOcUMENTATION SERVICE 100000 AIRCRAFt PHOTOS PLANS ENLARGING 130 SCALE PLANS ze 120 PAGE CATALOG $500 USA & CANADA $1000 AIR OVtRStAS Jim Peptttoo E PLANS AND PHOTO SERVICE 3209 MADISON AVE GREENSBORO NC 27403 l2925239 COPUIERIED AIRCRAII PLIS Technical Illustrations Suitable Framing Scale Drafting Scanning Servicu S Views D-TECI4 SYSTEMS Shawrsee Trail CatalogCat-tervflls IL 62910 6189852383 COMPLETE RIT S3500SPORT OR COMBAT Wt%G KITS tj7rO GENE SUE WINGSPANci WPcGAOGonitscLJfl PRODUCTS 318 7475331 Comport 5Mflg Metols Booko Pocciojon Inotnusents LATHES complete Catalog 5200 CAMPBELL TOOLS Co 2tOOMSeIms Rood Spnngfield OH 43505 AfrcandVSeaOIocaser 322s362 Obechi Large Sheets Please call 809-548-5201 send SASE 12306 Bergatrasse Leavenworth WA 98826
Edition: Model Aviation - 1993/08
Page Numbers: 59, 60, 63, 64, 66, 174
RADIO CONTROL SOARING OUR US F3B TEAM will competing August 6-15 1993 biennial F3B World Championships multi-task soaring contest will held near Tel Aviv Israel team includes pilots Larry Jolly Daryl Perkins Randy Spencer Team manager 1977 F3B World Champ Skip Miller Joe Wurts won 1991 Champs Holland defending F3B World Champion Daryl Perkins placed second Holland US team finished third behind Germany Great Britain guys practicing hard take 1993 team win time team needs support American sailplaners Until F3J Thermal Duration Soaring World Champs held 1995 F3B international event RC soaring team needs raise funds H 10 MAKO Specifications Wing Span 1140 Wing Area 9480 sqin Aspect Ratio 137 Airfoil 7037 RG15 Weight 68 oz Wing Loading 103 oz/sqft Fuselage Fibergiass/Keviar Wings Obechi/Fosa Type Precision Duration Designed 8en Clerx 7/92 help defray transportation practice costs arc picked up AMA Team members have organized giant merchandise raffle tickets $5 also selling official team logo T-shirts M L XL XXL $15 pins $3 patches $5 stickers $2 Please add 10% merchandise total shipping handling merchandise order over $25 will receive free team pin Send check raffle tickets merchandise 1993 USA Soaring Team 15781 Empire Lane Westminster CA 92683 Building flying Shadow 118 Over winter built Shadow 118 glider designed Roger Chastain kitted Rogers company Tekoa Center Design Roger industrial designer n K S profession has used engineering experience add nice touches Shadow kit Shadows appearance reminds Falcon 880 its bigger Its 118-inch August1993 59 jim Moyfllflafl5 moaei OT 1~b unanuie Herring hang glider part EOGASE exhibit display National Soaring Museum Shadow 118 Open Class contest sailplane designed Roger Chastain threemeter-span ship thermal duration contest flying sport flying Shadow 118 kits pre-sheeted wings stabs rudder minimize building time Ben Clerx latest Mako Semikits available Ben 1, 2 K 3I/ h z 4 Left Three-view Mako latest design Ben Clerx Above Ben Clerx L Roger Lackey seem justly proud Makos Both guys belong Harbor Soaring Society southern California Interested Soaring Electric Flight Great So Are Northeast Sailplane Products carry comprehensive line silent flight prod ucts industry sell RIO Sail planes Electrics related accessories reference features hundreds products doz ens informative articles technical infor mation great sport RIO silent flight can meet needs abilities beginner expert dedicated pro viding personal customer service Check out NSP. youll glad did Welcome world NSP first open unique reference will awe number quality products have Also ordering us easy fun because help step way order reference mail $700 $5 plus $2 s&h NSP Well ship reference via express mail arent completely satisfied simply send back prompt courteous refund Northeast Sailplane Products 16 Kirby Lane Williston Vermont 05495 Northeast Sailplane Products 1993 RC Soaring Electric Reference N Price $5 Northeast Sailplane Products irby Lane Williston VT 05495 C802 658-9482 comprehensive reference Radio Control Soaring Electric Flight wingspan six inches longer Falcon wing area994 square inchesis well over 100 square inches greater Shadow uses todays popular thermal airfoil SD7037 Fuselage dimensions Shadow Falcon virtually identical Shadow kit first batch build-em-yourself obechi-over foam wings Current kits have prebuilt wings molded wing tips really good deal because much money save lot construction time end up lighter finished glider Shadow weighs 78 ounces giving dry wing loading 115 ounces per square foot pre-sheeted wing kits weigh about 70 ounces loading will right around 10 ounces per square foot should ideal dry wing loading low wind conditions Ballast can added fuselage wind picks up about 10 mph though Shadow didnt have pre-sheeted wings everything kit beautifully fabricated building instructions complete con structing wings took bit time actually interesting operation because got guts speak used F Z Lam epoxy bagged wings Theres about bagging obechi come no conventional spar wing brass joiner tube carried between -inch ply root rib /8-inch sub-rib six inches out spar tapered strips fairly heavy unidirectional carbon fibertwo top bottom dont know construction same used pre-sheeted kits Ive found wings super-stiff fuselage excellently formed fiberglass trimmed fit canopy Finishing fuselage conventional except Roger has make three little foam plugs hold pushrod tubes proper places along fuselage sides Thats good idea wing joiner V-inch-round 14inch-long piece high-strength 7075T-6 aluminum dihedral angle bent fit between joiner brass wing tubes perfect like shake assembled gliders see anything sounds loose Shadow doesnt rattle its solid respects first wondered about strength aluminum joiner its proven adequate Neither joiner nor wings show much deflection during launch fact Shadow about best launching plane Ive flown must happy combination towhook location wing stiffness airfoil etc ship wants climb straight up building instructions Roger mentions son Blayne prefers rearward towhook location first launch scared because soon model left hand took off straight up like kite strong wind instant visions old stall snap roll over trick didnt though Flying Shadow 118 lot fun As just mentioned launching can exciting really no sweat once get sticks Good zooms easy after learn tim ing full winch pedal dive/acceleration pull-up Off tow Shadow handles much like Falcon 880 except think its easier fly say easier mean once center gravity CG stab settings dialed Shadow overly critical pitch control couple clicks up down stab trim change flying speed bit dont make terribly dramatic difference plane performs Also additional size weight Shadow give momentum help keep going its pointed doesnt skitter around still shows clearly encounters lift Once lift Shadow excellent climber no problem staying cored coordinated thermal turns after aileron differential coupled rudder adjusted liking Just personal aside impression first flew heavier ships like Mueller Comet 89T reminded driving Cadillac Everything smooth stable solid Shadow gives some feeling too Continued page 63 60 Model Aviation oaringlBlakeslee Continued page 60 can sort motor around sky giving up lot altitude say lift-to-drag L/D ratio very good Since no free lunch what give up heavier ship ability float out early morning no-lift situations However 10 ounces per square foot pre-sheeted wing kit Shadow rates medium wing-loading glider should perfect conditions Landings pretty much same routine flapped ships key getting model slowed down establish ing glide angle/flap setting depends wind speed Low wind speeds require flap shallower final glide youre going too fast approaching spot Higher winds mean lower ground speed need less flap steeper glide angle penetrate spot Shadow behaves quite nicely landing pattern glide angle can easily adjusted flap stick its just matter lots practice get timing down all-important 100point precision spot landings computer radio strongly recom mended ship like Shadow because electronic mixing makes setting up flying lot easier Coupled flap/down-elevator compensation big help because flaps go down nose wants come up Up ailerons coupled down flapsthe crow configurationis another helpful option adds drag helps glider sink think Shadow 118 excellent choice all-around thermal contest ship glider just have fun Kits available $35995 exclusively Northeast Sailplane Products new two-meter version Shadow also available $27495 NSPs address 16 Kirby Lane Williston VT 05495 call 802 658-9482 Mako Ben Clerx Ben has Californias successful competition pilots Last year won hotly contested Fall Soaring Festival Visalia old Falcon 880 Ben has developing own designs over past few years latest version Mako very pretty bird good example current thinking California contest soaring scene Ben has switched obechi-sheeted foam wings Although such construction may high tech glass-bagged wings obechi works fine straight thermal ships because can built lighter quite serviceable Anyway its always instructive see what top guys doing because obviously spend lot time hobby always figure out best tricks before rest us Bens description new Mako Mako competition sailplane designed precision duration thermal contests F3J competition using slightly longer 118-inch wingspan retains crisp responsive handling characteristics F3B-type sailplane fourth version design series goes back 1987 con struction third version Dazzle too complex builders needed simplified glass-bagged wings $90 carbon-fiber spar system Construction Mako similar other competition sailplanes intended advanced-to-expert builder pilot main design objective have plane would easily max thermal duration requirements cover plenty ground search lift should also responsive aerobaticnot fight off boredom after skying out also improve all-important landing scores 5D7037 airfoil 10 22 ounces per square foot will give required flight times lightest lift conditions flat wing triple-tapered leading edge has no tip stalling tendency tracks though rails during landings particularly gusty winds Although polyhedral tips winglets make Continued page 64 August 1993 63 UFM Ultimate Fun Machine LEX Electric powered N/C ultra-light s-off stable anybody can fly mbles easily evening All prefabricated components No painting no sanding necessary Two kit versions available #31 74 Skyflex Basic Kit #3184 Skyflex electric power system prewired motor on/off switch Required inexpensive accessories 2-channel aircraft radio 7-cell nicad battery Battery charger see 93 Robbe catalog details lie 170 Township Line Road Belle Mead NJ 08502 908 359-2115 Call nearest Robbe Dealer N-200AAA2200 N-150N2150 N-11OAA2110 N-270AA2270 N-600AA2600 N-500A2500 N-6SOSC2650 KR-2000C2 2000 KR-AAOOD2 4400 OAAE2700 N 225AE2225 KR 600AE2600 KR 1000AEL21000 KR-1200AE21200 KR-1700SCE21700 KR-2400CE22400 N-600SCR12600 N-1000SCR12900 N-1AOOSCR121400 N-1500SCR121500 N-hOOCh121100 N-1800C1T121800 N-400000124000 - Specify Solder labs AN-SOAAA AN-i SON 4N-200AAA AN-i 1OAA AN-225AE 4N-270AA 4N-600AA 4 N-i SO-AAE AN-SOOA AN-600AE AN-800AR AKR-1000AE 4 KIT- 1 200AE N-650SC 4N-1000SCR 4KR-1300SC AN-i AOOSCR 4KR- 1 700SGE AKR-2000C AKR-2400CE 4KR-2800CE 4 KR-A AOOD 4KIT-S500DE 5N-SOAAA SN-lOON 5N-1 1OAA SN -2 7OAA SN -600AA SN-750AAE SN -500 SN-600AE SN-800AR SKIT- 1 200AE SKIT- 1 300SC SN- 1AOOSCR SKIT- 2000C SKR-A400D SKR-SOOODE 4850 48150 48200 48110 48225 48270 48600 48750 48500 48600 48800 481000 481200 48650 481000 481300 481400 481700 48 2000 48 2400 48 2800 48 4400 48 5000 6050 60150 60110 60270 60600 60750 60500 60600 60800 601200 601300 601400 60 2000 60 4400 60 SOQO DIMENSONS Price DH 3940591200 3941720150 4531122150 551650150 5511161200 5431945100 6501094150 8661016300 99211735710 8661654250 9921929400 12722362700 127235431500 5431945200 650642250 6001094250 6501604300 6501909300 8661654375 9921929450 127223621000 6421909300 8661016325 8661299350 8661654350 8661929450 9921173425 9921929650 127223621000 FREE Charae FLAT895 FLAT/SQUARE895 FLAT/SQUARE895 FLAT/SQUARE895 FLAT/SQUARE 1095 FLAT/SQUARE 895 FLAT/SQUARE 895 FLAT/SQUARE 1095 FLAT995 FLAT1095 FLAT/SQUARE 1200 FLAT/SQUARE 1500 FLAT/SQUARE 1600 SQUARE1400 FLAT/SQUARE 1600 FLAT/SQUARE 1200 FLAT/SQUARE 1600 FLAT/SQUARE 1800 FLAT/SQUARE 2000 FLAT/SQUARE 2200 FLAT/SQUARE 2600 FLAT/SQUARE 3400 FLAT/SQUARE 4200 FLAT1200 FLAT1200 FLAT1200 FLAT1200 FLAT1000 FLAT1250 FLAT1200 FLAT1500 FLAT1500 FLAT1900 FLAT1500 FLAT1900 FLAT2400 FLAT4000 FLAT5000 U WU rz lIEU U vz 8N600AA966001X8 AA 1800 8N600AA966002X2X2 high 2000 8N750AAE967501X8 AA 2200 8N7SOAAE967502X2X2 high 2200 6N-800AR72800FLAT2000 6KR-1300SC721300FLAT1800 7KR-13005C841300FLAT2000 6N-1A00SCR721400FLAT2200 7N-1A00SCIT841400FLAT2500 6KR-1700SCE721700FLAT2800 7KR-1700SCE841700FLAT3100 6KR-2000C722000FLAT3000 6KIT-4400D724400FLAT5000 6 Volt12AH81200 12 Volt60AH$1000 RO Oiants/deVries Continued page 62 information must specific point scattergun approaches must avoided subject well-defined contact National Air Space Museum Archive Division Room 3100 MRC 322 WashingtonDC 20560 few weeks printout what have bird will sent along ordering instructions course its going cost paper copies drawings microfilm reels information will well worth effort sincere thanks Brian good info RC SoaringlBlakeslee Continued page 63 aileron-equipped plane stable easier fly add drag reduce planes maneuverability Advanced pilots dont need training wheels lack bent up tips made possible increase aileron area roll response landing accuracy Couple flaps ailerons via computer radio some great aerobatics RG-15 airfoil once thought F3B speed airfoil thermals quite well lower wing loadings using camber control has excellent speed range think choice SD7037 RG-15 airfoil covers two best airfoils available thermal soaring fiberglass fuselage obechi-over-foam-core wings Makos construction straightforward typical current high-tech sailplanesbut no high-tech tools required Four wing-mounted servos operate flaps ailerons two fuselagemounted servos operate rudder stabilizer within slip-on nose cone two-panel wing incorporating wooden built-up spar Kevlar carbon fiber joined hardened steel rod obechi sheeting can applied stacking weight pressing between foam-core beds better using vacuum-bag system Foam-core full-flying stabs sheeted balsa obechi built-up rudder round out Makos construction am producing limited number Mako semikits kit contains fiberglass fuselage wing stab foam cores hardware Kevlar carbon fiber can order obechi veneer wing sheeting Daves Wood Products 12306 Bergstrasse Leavenworth WA 98826 Tel 509 548-5201 remaining bits balsa plywood probably lying around shop interested Mako semikit please write price Still documentation kickif need know about Northrop P-61 Black Widow let plug latest book ViP Publishers Inc PO Box 16103 Colorado Springs CO 80935 Dick Phillips yours truly have published Dave McLarens history big WW II night fighter 128-page book tells P-61 story along 70 photos threeview Widow book $1695 plus $250 postage handling working another McLaren book present subject North American F-82 Twin Mustang its various configurations Hope youre enjoying big bird flying season roximately $185RB] availability Ben Clerx 39 Seabrook Cove Newport Beach CA 92660 Mako flight report Roger Lackey want second opinion Mako slightly edited report found Plane Rap newsletter Harbor Soaring Society Pete Young editor Makos construction similar other planes its class its flying honestly best plane Ive ever flown Ive six other Open-class sailplanes flew very well because subtle differences engineered Mako outperforms What helps improve landings flat wing design tips-up planes can experience good amount polyhedral effect flying landing especially slight crosswind Mako s flat wings have very little tendency wallow around landings very crisp controlled Some people think flat wings susceptible tip-stalling just doesnt happen Mako couple times have turned too tightly low speeds has happened plane slipped little resumed flying fact plane gentle its third flight transmitter placed ground plane flew unassisted about minute before starting gentle bank right Thermaling plane very nice too wings signal lift extremely well light conditions feeding little camber really slows down climbs little trailing edge reflex helps penetration its no speed demon plane can still move out required Having flaps ailerons coupled slightly gives added roll authority allows nice tight aerobatics does launch Nice straight high doesnt want drop tip stall anything nasty just wants go up strong spar construction provides confidence go launch get top light downwind conditions Continued page 66 64 Model Aviation BATTERIES VISA MASTERCARD DISCOVER $400 SHIPPING & HANDLING 6% SALES TAX FOR FL RESIDENTS m five minutes can upgrade stan dard Futaba Airtronics servos ball bearing servos new EMS Ball Bearing Conversion Kit New case tops accurately molded supertough glass filled fuel-proof Celcon include top quality stainless steel ball bearing servo output shaft * Stops case top and/or plastic bushing wear * Prevents output gear shaft shimmy * Reduces friction improves servo centering * Enhances performance airplanes boats & cars Mandatory helicopter servos * Free output arm provided case top * Guaranteed against breakage year * pay $3995 $2995 BBC-1 Fits FUTABA 528/5 128 S38/S138 S48/S148 Servos set 4$2595 BBC-2As above set I$695 BBC-3Fits AIRTRONICS 94102 Servos set 4$2595 BBC-4As above set I$695 BBC-5Ball Bearing Only JR 501 507 RCDAPOLLO 05 10 FOCUS HS300 HS500 ACE 330342 342HS TOWER TS-5 Servos set 4$1995 Add $300 Shipping Handling orders nne714 692-1393 Info Onlycalifornia Residents Add 775% Sales Tax 800 845-8978 Orders OnlyVISA MASTERCARD Accepted 58 Engine $59500 42 Engine $52500 32 Engine $45000 26 Engine $45000 $1200 Shipping Engine Test Ran 503 938-6743 Fax 503 938-6950 Rt 3 Box 242-A Milton-Freewater OR 97862 RC SoaringlBlakeslee Continued page 64 after ultimate survival depends being guy top food chain National Soaring Museum dedication Paul Schweizer sent letter saying National Soaring Museum NSM located Elmira New York held dedication its Evolution Gliders Sailplanes Exhibit EOGASE May 21-22 exhibit includes 122 models gliders sailplanes illustrate develop ment soaring its beginning 1895 until 1990 Paul chairman NSM Exhibit Committee Along brothers Ernest William founded Schweizer Air craft Company way back 1938 Paul said NSM has great reports model exhibit model builders well some designers hand dedication Paul also reported NSM now has Barnaby-Klemperer exhibit SSA Soaring Convention Seattle last year has -scale models Prufling Barnaby flew Blaue Maus Klemperer flew models built Paul Gibson Craig Aho Bellevue Washington Paul said superb Prufling model built original plans 1000 building hours spent st Sailplaners visiting New York States southern tier should plan stopping see National Soaring Museum RD #3 Harris Hill Elmira NY 14903 Tel 607 734-3128 Jim Moynihans 1896 Chanute-Hemng hang glider Fran Ptaszkiewicz Tonawanda New York sent photo Jims model Chanute-Herrtng hang glider now part EOGASE exhibit mentioned above Fran also sent following letter March Jim Moynihan Don Hobel drove down NSM Elmira Jim could personally deliver model Chanute-Hemng hang glider EOGASE exhibit Jim master model craftsman par excellence Paul Schweizer asked Jim build model day itself fantastic Paul Schweizer himself greeted us museum door escorted us down floor museum model diorama located presentation made Jims model added exhibit Paul made reservations us have lunch him nearby restaurant least three-hour lunch talk course about models full-scale gliders Paul pointed out two brothers modelers years before formed glider company late 30s said lot information new designs gleaned Continued page 174 66 Model Aviation Yoroa Linda U POWER WALKER MACHINE SCALE DOCUMENTATION are/Antlque/Classic Aircraft lOOts photos tOte 3-views rareuniqoatone kind Osatisfaction guaranteed _________catalog $200 US tonde Golden kws Models 927Od CO 80226 dee f/4krx6oo1 Learn fly planes private field Five 6 day course $350 Open year round Send SASE complete info Southwest RC Flying 2818 Carolina NE Albuquerque NM 87110505-832-6394 Bob Fiorenzej Hobby Center Inc UPS Orders Shipped Doily Dealer Yellow Aircraft Send $300 Yellow Info Peckege z digit Showyoom 135 mtn Dig World Full Line Hobby Accessonea 420 West SR 434 Winter Springs FL 32708407 327-0353 RC SoaringlBlakeslee Continued page 66 free flight models after company up going interesting times have ever Following lunch returned museum met curator took us restoration storage areas gliders repaired held pending changes museum displays Meeting Schweizer brothers listening history unraveled fantastic experience say day interesting would give credit Making obechi-sheeted wings Because current popularity sheeted foam-core wings obechi wood veneer thought would good time pass along few tips Ive picked up Obechi splits very easily need careful handling cutting Apply masking tape over cut lines make cuts sharp scissors Next coat both sides sheet Flecto Diamond Finish Varathane seal wood use high-gloss variety apply foamtype brush applying Diamond Finish first side obechi will curl up like potato chip Just keep going best can Immediately coat other side will flatten right out Hang sheet up paper clamps dry finishing pre-sheeted obechi wings like ones come Shadow Thermal Eagle kits apply heavy first coat Diamond Finish Untreated obechi acts like blotterthe coating can soak down epoxy allow softened obechi pull away bond Apply light coat Diamond Finish paper towel thin coat will allow polymers cross-linking thing seal wood can come back heavier coats loosening bond Three five coats wet-sanding between will produce nice glossy finish use E-Z Lam laminating epoxy Aerospace Composites apply obechi foam cores can spread plastic squeegee foam roller Just thin coat thats required Tape trailing edges together masking tape before beginning epoxy application Vacuum-bagging best way go because produces perfectly pressure surfaces Most obechi will applied white foam cores should use about six inches mercury vacuum pressure six inches mercury will crush white foam Vacuum gauges read inches mercury psi Six inches mercury equals about three psi equivalent load 1320 pounds wing size Falcon 880 Try putting bricks bench Aerospace Composite Products E-Z Vac Composite Structures Technology Mighty Mini Vac vacuum pumps fine bagging obechi See manufacturers ads addresses pumps run continuously set six inches mercury available individually complete bagging kit includes pump bag material tubing breather felt fittings better deal kits dont come vacuum gauge can buy extra wish E-Z Vac kit also includes pair very nice Quick-Lock plastic clips used seal ends bag bag accurate wing must start perfectly flat working surface solidcore exterior door usually good bet can often buy slightly damaged local lumberyard good price After placing wet wing assembly bag top side up sealing run pump just long enough get air out bag bag film should contact wing no vacuum yet Shut off pump smooth wrinkles out bag Place bottom foam bed under bag top bed top bag Both beds must positioned exactly under/over wing core Felt-tip pen marks should have made both ends blank core cut Eyeball marks ensure beds aligned perfectly core put flat board top top bed few pounds extra weight spread along board will ensure whole assembly pressed down good contact flat work surface idea make sure everything flat straight before vacuum applied Once vacuum applied item bag will shapeforever everything looks okay turn pump let run least 12 hours temperature shop below about 72 24 hours better Epoxy takes couple weeks fully cure best let wings sit beds flat surface four five days before working Good luck Model Aviation er & Bnglne Power Free FlIght Display Control Une Blectric Power RIC AIrplanes new Illustrated 32 page tabloId sIze catelog US & Canade $100 Forelgh $300 Pertn Volley Hobby Center 837-A W Mom St Lanodole PA 19446 215 3654770 WORLDS LARGEST SCALE PLANS & DOcUMENTATION SERVICE 100000 AIRCRAFt PHOTOS PLANS ENLARGING 130 SCALE PLANS ze 120 PAGE CATALOG $500 USA & CANADA $1000 AIR OVtRStAS Jim Peptttoo E PLANS AND PHOTO SERVICE 3209 MADISON AVE GREENSBORO NC 27403 l2925239 COPUIERIED AIRCRAII PLIS Technical Illustrations Suitable Framing Scale Drafting Scanning Servicu S Views D-TECI4 SYSTEMS Shawrsee Trail CatalogCat-tervflls IL 62910 6189852383 COMPLETE RIT S3500SPORT OR COMBAT Wt%G KITS tj7rO GENE SUE WINGSPANci WPcGAOGonitscLJfl PRODUCTS 318 7475331 Comport 5Mflg Metols Booko Pocciojon Inotnusents LATHES complete Catalog 5200 CAMPBELL TOOLS Co 2tOOMSeIms Rood Spnngfield OH 43505 AfrcandVSeaOIocaser 322s362 Obechi Large Sheets Please call 809-548-5201 send SASE 12306 Bergatrasse Leavenworth WA 98826
Edition: Model Aviation - 1993/08
Page Numbers: 59, 60, 63, 64, 66, 174
RADIO CONTROL SOARING OUR US F3B TEAM will competing August 6-15 1993 biennial F3B World Championships multi-task soaring contest will held near Tel Aviv Israel team includes pilots Larry Jolly Daryl Perkins Randy Spencer Team manager 1977 F3B World Champ Skip Miller Joe Wurts won 1991 Champs Holland defending F3B World Champion Daryl Perkins placed second Holland US team finished third behind Germany Great Britain guys practicing hard take 1993 team win time team needs support American sailplaners Until F3J Thermal Duration Soaring World Champs held 1995 F3B international event RC soaring team needs raise funds H 10 MAKO Specifications Wing Span 1140 Wing Area 9480 sqin Aspect Ratio 137 Airfoil 7037 RG15 Weight 68 oz Wing Loading 103 oz/sqft Fuselage Fibergiass/Keviar Wings Obechi/Fosa Type Precision Duration Designed 8en Clerx 7/92 help defray transportation practice costs arc picked up AMA Team members have organized giant merchandise raffle tickets $5 also selling official team logo T-shirts M L XL XXL $15 pins $3 patches $5 stickers $2 Please add 10% merchandise total shipping handling merchandise order over $25 will receive free team pin Send check raffle tickets merchandise 1993 USA Soaring Team 15781 Empire Lane Westminster CA 92683 Building flying Shadow 118 Over winter built Shadow 118 glider designed Roger Chastain kitted Rogers company Tekoa Center Design Roger industrial designer n K S profession has used engineering experience add nice touches Shadow kit Shadows appearance reminds Falcon 880 its bigger Its 118-inch August1993 59 jim Moyfllflafl5 moaei OT 1~b unanuie Herring hang glider part EOGASE exhibit display National Soaring Museum Shadow 118 Open Class contest sailplane designed Roger Chastain threemeter-span ship thermal duration contest flying sport flying Shadow 118 kits pre-sheeted wings stabs rudder minimize building time Ben Clerx latest Mako Semikits available Ben 1, 2 K 3I/ h z 4 Left Three-view Mako latest design Ben Clerx Above Ben Clerx L Roger Lackey seem justly proud Makos Both guys belong Harbor Soaring Society southern California Interested Soaring Electric Flight Great So Are Northeast Sailplane Products carry comprehensive line silent flight prod ucts industry sell RIO Sail planes Electrics related accessories reference features hundreds products doz ens informative articles technical infor mation great sport RIO silent flight can meet needs abilities beginner expert dedicated pro viding personal customer service Check out NSP. youll glad did Welcome world NSP first open unique reference will awe number quality products have Also ordering us easy fun because help step way order reference mail $700 $5 plus $2 s&h NSP Well ship reference via express mail arent completely satisfied simply send back prompt courteous refund Northeast Sailplane Products 16 Kirby Lane Williston Vermont 05495 Northeast Sailplane Products 1993 RC Soaring Electric Reference N Price $5 Northeast Sailplane Products irby Lane Williston VT 05495 C802 658-9482 comprehensive reference Radio Control Soaring Electric Flight wingspan six inches longer Falcon wing area994 square inchesis well over 100 square inches greater Shadow uses todays popular thermal airfoil SD7037 Fuselage dimensions Shadow Falcon virtually identical Shadow kit first batch build-em-yourself obechi-over foam wings Current kits have prebuilt wings molded wing tips really good deal because much money save lot construction time end up lighter finished glider Shadow weighs 78 ounces giving dry wing loading 115 ounces per square foot pre-sheeted wing kits weigh about 70 ounces loading will right around 10 ounces per square foot should ideal dry wing loading low wind conditions Ballast can added fuselage wind picks up about 10 mph though Shadow didnt have pre-sheeted wings everything kit beautifully fabricated building instructions complete con structing wings took bit time actually interesting operation because got guts speak used F Z Lam epoxy bagged wings Theres about bagging obechi come no conventional spar wing brass joiner tube carried between -inch ply root rib /8-inch sub-rib six inches out spar tapered strips fairly heavy unidirectional carbon fibertwo top bottom dont know construction same used pre-sheeted kits Ive found wings super-stiff fuselage excellently formed fiberglass trimmed fit canopy Finishing fuselage conventional except Roger has make three little foam plugs hold pushrod tubes proper places along fuselage sides Thats good idea wing joiner V-inch-round 14inch-long piece high-strength 7075T-6 aluminum dihedral angle bent fit between joiner brass wing tubes perfect like shake assembled gliders see anything sounds loose Shadow doesnt rattle its solid respects first wondered about strength aluminum joiner its proven adequate Neither joiner nor wings show much deflection during launch fact Shadow about best launching plane Ive flown must happy combination towhook location wing stiffness airfoil etc ship wants climb straight up building instructions Roger mentions son Blayne prefers rearward towhook location first launch scared because soon model left hand took off straight up like kite strong wind instant visions old stall snap roll over trick didnt though Flying Shadow 118 lot fun As just mentioned launching can exciting really no sweat once get sticks Good zooms easy after learn tim ing full winch pedal dive/acceleration pull-up Off tow Shadow handles much like Falcon 880 except think its easier fly say easier mean once center gravity CG stab settings dialed Shadow overly critical pitch control couple clicks up down stab trim change flying speed bit dont make terribly dramatic difference plane performs Also additional size weight Shadow give momentum help keep going its pointed doesnt skitter around still shows clearly encounters lift Once lift Shadow excellent climber no problem staying cored coordinated thermal turns after aileron differential coupled rudder adjusted liking Just personal aside impression first flew heavier ships like Mueller Comet 89T reminded driving Cadillac Everything smooth stable solid Shadow gives some feeling too Continued page 63 60 Model Aviation oaringlBlakeslee Continued page 60 can sort motor around sky giving up lot altitude say lift-to-drag L/D ratio very good Since no free lunch what give up heavier ship ability float out early morning no-lift situations However 10 ounces per square foot pre-sheeted wing kit Shadow rates medium wing-loading glider should perfect conditions Landings pretty much same routine flapped ships key getting model slowed down establish ing glide angle/flap setting depends wind speed Low wind speeds require flap shallower final glide youre going too fast approaching spot Higher winds mean lower ground speed need less flap steeper glide angle penetrate spot Shadow behaves quite nicely landing pattern glide angle can easily adjusted flap stick its just matter lots practice get timing down all-important 100point precision spot landings computer radio strongly recom mended ship like Shadow because electronic mixing makes setting up flying lot easier Coupled flap/down-elevator compensation big help because flaps go down nose wants come up Up ailerons coupled down flapsthe crow configurationis another helpful option adds drag helps glider sink think Shadow 118 excellent choice all-around thermal contest ship glider just have fun Kits available $35995 exclusively Northeast Sailplane Products new two-meter version Shadow also available $27495 NSPs address 16 Kirby Lane Williston VT 05495 call 802 658-9482 Mako Ben Clerx Ben has Californias successful competition pilots Last year won hotly contested Fall Soaring Festival Visalia old Falcon 880 Ben has developing own designs over past few years latest version Mako very pretty bird good example current thinking California contest soaring scene Ben has switched obechi-sheeted foam wings Although such construction may high tech glass-bagged wings obechi works fine straight thermal ships because can built lighter quite serviceable Anyway its always instructive see what top guys doing because obviously spend lot time hobby always figure out best tricks before rest us Bens description new Mako Mako competition sailplane designed precision duration thermal contests F3J competition using slightly longer 118-inch wingspan retains crisp responsive handling characteristics F3B-type sailplane fourth version design series goes back 1987 con struction third version Dazzle too complex builders needed simplified glass-bagged wings $90 carbon-fiber spar system Construction Mako similar other competition sailplanes intended advanced-to-expert builder pilot main design objective have plane would easily max thermal duration requirements cover plenty ground search lift should also responsive aerobaticnot fight off boredom after skying out also improve all-important landing scores 5D7037 airfoil 10 22 ounces per square foot will give required flight times lightest lift conditions flat wing triple-tapered leading edge has no tip stalling tendency tracks though rails during landings particularly gusty winds Although polyhedral tips winglets make Continued page 64 August 1993 63 UFM Ultimate Fun Machine LEX Electric powered N/C ultra-light s-off stable anybody can fly mbles easily evening All prefabricated components No painting no sanding necessary Two kit versions available #31 74 Skyflex Basic Kit #3184 Skyflex electric power system prewired motor on/off switch Required inexpensive accessories 2-channel aircraft radio 7-cell nicad battery Battery charger see 93 Robbe catalog details lie 170 Township Line Road Belle Mead NJ 08502 908 359-2115 Call nearest Robbe Dealer N-200AAA2200 N-150N2150 N-11OAA2110 N-270AA2270 N-600AA2600 N-500A2500 N-6SOSC2650 KR-2000C2 2000 KR-AAOOD2 4400 OAAE2700 N 225AE2225 KR 600AE2600 KR 1000AEL21000 KR-1200AE21200 KR-1700SCE21700 KR-2400CE22400 N-600SCR12600 N-1000SCR12900 N-1AOOSCR121400 N-1500SCR121500 N-hOOCh121100 N-1800C1T121800 N-400000124000 - Specify Solder labs AN-SOAAA AN-i SON 4N-200AAA AN-i 1OAA AN-225AE 4N-270AA 4N-600AA 4 N-i SO-AAE AN-SOOA AN-600AE AN-800AR AKR-1000AE 4 KIT- 1 200AE N-650SC 4N-1000SCR 4KR-1300SC AN-i AOOSCR 4KR- 1 700SGE AKR-2000C AKR-2400CE 4KR-2800CE 4 KR-A AOOD 4KIT-S500DE 5N-SOAAA SN-lOON 5N-1 1OAA SN -2 7OAA SN -600AA SN-750AAE SN -500 SN-600AE SN-800AR SKIT- 1 200AE SKIT- 1 300SC SN- 1AOOSCR SKIT- 2000C SKR-A400D SKR-SOOODE 4850 48150 48200 48110 48225 48270 48600 48750 48500 48600 48800 481000 481200 48650 481000 481300 481400 481700 48 2000 48 2400 48 2800 48 4400 48 5000 6050 60150 60110 60270 60600 60750 60500 60600 60800 601200 601300 601400 60 2000 60 4400 60 SOQO DIMENSONS Price DH 3940591200 3941720150 4531122150 551650150 5511161200 5431945100 6501094150 8661016300 99211735710 8661654250 9921929400 12722362700 127235431500 5431945200 650642250 6001094250 6501604300 6501909300 8661654375 9921929450 127223621000 6421909300 8661016325 8661299350 8661654350 8661929450 9921173425 9921929650 127223621000 FREE Charae FLAT895 FLAT/SQUARE895 FLAT/SQUARE895 FLAT/SQUARE895 FLAT/SQUARE 1095 FLAT/SQUARE 895 FLAT/SQUARE 895 FLAT/SQUARE 1095 FLAT995 FLAT1095 FLAT/SQUARE 1200 FLAT/SQUARE 1500 FLAT/SQUARE 1600 SQUARE1400 FLAT/SQUARE 1600 FLAT/SQUARE 1200 FLAT/SQUARE 1600 FLAT/SQUARE 1800 FLAT/SQUARE 2000 FLAT/SQUARE 2200 FLAT/SQUARE 2600 FLAT/SQUARE 3400 FLAT/SQUARE 4200 FLAT1200 FLAT1200 FLAT1200 FLAT1200 FLAT1000 FLAT1250 FLAT1200 FLAT1500 FLAT1500 FLAT1900 FLAT1500 FLAT1900 FLAT2400 FLAT4000 FLAT5000 U WU rz lIEU U vz 8N600AA966001X8 AA 1800 8N600AA966002X2X2 high 2000 8N750AAE967501X8 AA 2200 8N7SOAAE967502X2X2 high 2200 6N-800AR72800FLAT2000 6KR-1300SC721300FLAT1800 7KR-13005C841300FLAT2000 6N-1A00SCR721400FLAT2200 7N-1A00SCIT841400FLAT2500 6KR-1700SCE721700FLAT2800 7KR-1700SCE841700FLAT3100 6KR-2000C722000FLAT3000 6KIT-4400D724400FLAT5000 6 Volt12AH81200 12 Volt60AH$1000 RO Oiants/deVries Continued page 62 information must specific point scattergun approaches must avoided subject well-defined contact National Air Space Museum Archive Division Room 3100 MRC 322 WashingtonDC 20560 few weeks printout what have bird will sent along ordering instructions course its going cost paper copies drawings microfilm reels information will well worth effort sincere thanks Brian good info RC SoaringlBlakeslee Continued page 63 aileron-equipped plane stable easier fly add drag reduce planes maneuverability Advanced pilots dont need training wheels lack bent up tips made possible increase aileron area roll response landing accuracy Couple flaps ailerons via computer radio some great aerobatics RG-15 airfoil once thought F3B speed airfoil thermals quite well lower wing loadings using camber control has excellent speed range think choice SD7037 RG-15 airfoil covers two best airfoils available thermal soaring fiberglass fuselage obechi-over-foam-core wings Makos construction straightforward typical current high-tech sailplanesbut no high-tech tools required Four wing-mounted servos operate flaps ailerons two fuselagemounted servos operate rudder stabilizer within slip-on nose cone two-panel wing incorporating wooden built-up spar Kevlar carbon fiber joined hardened steel rod obechi sheeting can applied stacking weight pressing between foam-core beds better using vacuum-bag system Foam-core full-flying stabs sheeted balsa obechi built-up rudder round out Makos construction am producing limited number Mako semikits kit contains fiberglass fuselage wing stab foam cores hardware Kevlar carbon fiber can order obechi veneer wing sheeting Daves Wood Products 12306 Bergstrasse Leavenworth WA 98826 Tel 509 548-5201 remaining bits balsa plywood probably lying around shop interested Mako semikit please write price Still documentation kickif need know about Northrop P-61 Black Widow let plug latest book ViP Publishers Inc PO Box 16103 Colorado Springs CO 80935 Dick Phillips yours truly have published Dave McLarens history big WW II night fighter 128-page book tells P-61 story along 70 photos threeview Widow book $1695 plus $250 postage handling working another McLaren book present subject North American F-82 Twin Mustang its various configurations Hope youre enjoying big bird flying season roximately $185RB] availability Ben Clerx 39 Seabrook Cove Newport Beach CA 92660 Mako flight report Roger Lackey want second opinion Mako slightly edited report found Plane Rap newsletter Harbor Soaring Society Pete Young editor Makos construction similar other planes its class its flying honestly best plane Ive ever flown Ive six other Open-class sailplanes flew very well because subtle differences engineered Mako outperforms What helps improve landings flat wing design tips-up planes can experience good amount polyhedral effect flying landing especially slight crosswind Mako s flat wings have very little tendency wallow around landings very crisp controlled Some people think flat wings susceptible tip-stalling just doesnt happen Mako couple times have turned too tightly low speeds has happened plane slipped little resumed flying fact plane gentle its third flight transmitter placed ground plane flew unassisted about minute before starting gentle bank right Thermaling plane very nice too wings signal lift extremely well light conditions feeding little camber really slows down climbs little trailing edge reflex helps penetration its no speed demon plane can still move out required Having flaps ailerons coupled slightly gives added roll authority allows nice tight aerobatics does launch Nice straight high doesnt want drop tip stall anything nasty just wants go up strong spar construction provides confidence go launch get top light downwind conditions Continued page 66 64 Model Aviation BATTERIES VISA MASTERCARD DISCOVER $400 SHIPPING & HANDLING 6% SALES TAX FOR FL RESIDENTS m five minutes can upgrade stan dard Futaba Airtronics servos ball bearing servos new EMS Ball Bearing Conversion Kit New case tops accurately molded supertough glass filled fuel-proof Celcon include top quality stainless steel ball bearing servo output shaft * Stops case top and/or plastic bushing wear * Prevents output gear shaft shimmy * Reduces friction improves servo centering * Enhances performance airplanes boats & cars Mandatory helicopter servos * Free output arm provided case top * Guaranteed against breakage year * pay $3995 $2995 BBC-1 Fits FUTABA 528/5 128 S38/S138 S48/S148 Servos set 4$2595 BBC-2As above set I$695 BBC-3Fits AIRTRONICS 94102 Servos set 4$2595 BBC-4As above set I$695 BBC-5Ball Bearing Only JR 501 507 RCDAPOLLO 05 10 FOCUS HS300 HS500 ACE 330342 342HS TOWER TS-5 Servos set 4$1995 Add $300 Shipping Handling orders nne714 692-1393 Info Onlycalifornia Residents Add 775% Sales Tax 800 845-8978 Orders OnlyVISA MASTERCARD Accepted 58 Engine $59500 42 Engine $52500 32 Engine $45000 26 Engine $45000 $1200 Shipping Engine Test Ran 503 938-6743 Fax 503 938-6950 Rt 3 Box 242-A Milton-Freewater OR 97862 RC SoaringlBlakeslee Continued page 64 after ultimate survival depends being guy top food chain National Soaring Museum dedication Paul Schweizer sent letter saying National Soaring Museum NSM located Elmira New York held dedication its Evolution Gliders Sailplanes Exhibit EOGASE May 21-22 exhibit includes 122 models gliders sailplanes illustrate develop ment soaring its beginning 1895 until 1990 Paul chairman NSM Exhibit Committee Along brothers Ernest William founded Schweizer Air craft Company way back 1938 Paul said NSM has great reports model exhibit model builders well some designers hand dedication Paul also reported NSM now has Barnaby-Klemperer exhibit SSA Soaring Convention Seattle last year has -scale models Prufling Barnaby flew Blaue Maus Klemperer flew models built Paul Gibson Craig Aho Bellevue Washington Paul said superb Prufling model built original plans 1000 building hours spent st Sailplaners visiting New York States southern tier should plan stopping see National Soaring Museum RD #3 Harris Hill Elmira NY 14903 Tel 607 734-3128 Jim Moynihans 1896 Chanute-Hemng hang glider Fran Ptaszkiewicz Tonawanda New York sent photo Jims model Chanute-Herrtng hang glider now part EOGASE exhibit mentioned above Fran also sent following letter March Jim Moynihan Don Hobel drove down NSM Elmira Jim could personally deliver model Chanute-Hemng hang glider EOGASE exhibit Jim master model craftsman par excellence Paul Schweizer asked Jim build model day itself fantastic Paul Schweizer himself greeted us museum door escorted us down floor museum model diorama located presentation made Jims model added exhibit Paul made reservations us have lunch him nearby restaurant least three-hour lunch talk course about models full-scale gliders Paul pointed out two brothers modelers years before formed glider company late 30s said lot information new designs gleaned Continued page 174 66 Model Aviation Yoroa Linda U POWER WALKER MACHINE SCALE DOCUMENTATION are/Antlque/Classic Aircraft lOOts photos tOte 3-views rareuniqoatone kind Osatisfaction guaranteed _________catalog $200 US tonde Golden kws Models 927Od CO 80226 dee f/4krx6oo1 Learn fly planes private field Five 6 day course $350 Open year round Send SASE complete info Southwest RC Flying 2818 Carolina NE Albuquerque NM 87110505-832-6394 Bob Fiorenzej Hobby Center Inc UPS Orders Shipped Doily Dealer Yellow Aircraft Send $300 Yellow Info Peckege z digit Showyoom 135 mtn Dig World Full Line Hobby Accessonea 420 West SR 434 Winter Springs FL 32708407 327-0353 RC SoaringlBlakeslee Continued page 66 free flight models after company up going interesting times have ever Following lunch returned museum met curator took us restoration storage areas gliders repaired held pending changes museum displays Meeting Schweizer brothers listening history unraveled fantastic experience say day interesting would give credit Making obechi-sheeted wings Because current popularity sheeted foam-core wings obechi wood veneer thought would good time pass along few tips Ive picked up Obechi splits very easily need careful handling cutting Apply masking tape over cut lines make cuts sharp scissors Next coat both sides sheet Flecto Diamond Finish Varathane seal wood use high-gloss variety apply foamtype brush applying Diamond Finish first side obechi will curl up like potato chip Just keep going best can Immediately coat other side will flatten right out Hang sheet up paper clamps dry finishing pre-sheeted obechi wings like ones come Shadow Thermal Eagle kits apply heavy first coat Diamond Finish Untreated obechi acts like blotterthe coating can soak down epoxy allow softened obechi pull away bond Apply light coat Diamond Finish paper towel thin coat will allow polymers cross-linking thing seal wood can come back heavier coats loosening bond Three five coats wet-sanding between will produce nice glossy finish use E-Z Lam laminating epoxy Aerospace Composites apply obechi foam cores can spread plastic squeegee foam roller Just thin coat thats required Tape trailing edges together masking tape before beginning epoxy application Vacuum-bagging best way go because produces perfectly pressure surfaces Most obechi will applied white foam cores should use about six inches mercury vacuum pressure six inches mercury will crush white foam Vacuum gauges read inches mercury psi Six inches mercury equals about three psi equivalent load 1320 pounds wing size Falcon 880 Try putting bricks bench Aerospace Composite Products E-Z Vac Composite Structures Technology Mighty Mini Vac vacuum pumps fine bagging obechi See manufacturers ads addresses pumps run continuously set six inches mercury available individually complete bagging kit includes pump bag material tubing breather felt fittings better deal kits dont come vacuum gauge can buy extra wish E-Z Vac kit also includes pair very nice Quick-Lock plastic clips used seal ends bag bag accurate wing must start perfectly flat working surface solidcore exterior door usually good bet can often buy slightly damaged local lumberyard good price After placing wet wing assembly bag top side up sealing run pump just long enough get air out bag bag film should contact wing no vacuum yet Shut off pump smooth wrinkles out bag Place bottom foam bed under bag top bed top bag Both beds must positioned exactly under/over wing core Felt-tip pen marks should have made both ends blank core cut Eyeball marks ensure beds aligned perfectly core put flat board top top bed few pounds extra weight spread along board will ensure whole assembly pressed down good contact flat work surface idea make sure everything flat straight before vacuum applied Once vacuum applied item bag will shapeforever everything looks okay turn pump let run least 12 hours temperature shop below about 72 24 hours better Epoxy takes couple weeks fully cure best let wings sit beds flat surface four five days before working Good luck Model Aviation er & Bnglne Power Free FlIght Display Control Une Blectric Power RIC AIrplanes new Illustrated 32 page tabloId sIze catelog US & Canade $100 Forelgh $300 Pertn Volley Hobby Center 837-A W Mom St Lanodole PA 19446 215 3654770 WORLDS LARGEST SCALE PLANS & DOcUMENTATION SERVICE 100000 AIRCRAFt PHOTOS PLANS ENLARGING 130 SCALE PLANS ze 120 PAGE CATALOG $500 USA & CANADA $1000 AIR OVtRStAS Jim Peptttoo E PLANS AND PHOTO SERVICE 3209 MADISON AVE GREENSBORO NC 27403 l2925239 COPUIERIED AIRCRAII PLIS Technical Illustrations Suitable Framing Scale Drafting Scanning Servicu S Views D-TECI4 SYSTEMS Shawrsee Trail CatalogCat-tervflls IL 62910 6189852383 COMPLETE RIT S3500SPORT OR COMBAT Wt%G KITS tj7rO GENE SUE WINGSPANci WPcGAOGonitscLJfl PRODUCTS 318 7475331 Comport 5Mflg Metols Booko Pocciojon Inotnusents LATHES complete Catalog 5200 CAMPBELL TOOLS Co 2tOOMSeIms Rood Spnngfield OH 43505 AfrcandVSeaOIocaser 322s362 Obechi Large Sheets Please call 809-548-5201 send SASE 12306 Bergatrasse Leavenworth WA 98826
Edition: Model Aviation - 1993/08
Page Numbers: 59, 60, 63, 64, 66, 174
RADIO CONTROL SOARING OUR US F3B TEAM will competing August 6-15 1993 biennial F3B World Championships multi-task soaring contest will held near Tel Aviv Israel team includes pilots Larry Jolly Daryl Perkins Randy Spencer Team manager 1977 F3B World Champ Skip Miller Joe Wurts won 1991 Champs Holland defending F3B World Champion Daryl Perkins placed second Holland US team finished third behind Germany Great Britain guys practicing hard take 1993 team win time team needs support American sailplaners Until F3J Thermal Duration Soaring World Champs held 1995 F3B international event RC soaring team needs raise funds H 10 MAKO Specifications Wing Span 1140 Wing Area 9480 sqin Aspect Ratio 137 Airfoil 7037 RG15 Weight 68 oz Wing Loading 103 oz/sqft Fuselage Fibergiass/Keviar Wings Obechi/Fosa Type Precision Duration Designed 8en Clerx 7/92 help defray transportation practice costs arc picked up AMA Team members have organized giant merchandise raffle tickets $5 also selling official team logo T-shirts M L XL XXL $15 pins $3 patches $5 stickers $2 Please add 10% merchandise total shipping handling merchandise order over $25 will receive free team pin Send check raffle tickets merchandise 1993 USA Soaring Team 15781 Empire Lane Westminster CA 92683 Building flying Shadow 118 Over winter built Shadow 118 glider designed Roger Chastain kitted Rogers company Tekoa Center Design Roger industrial designer n K S profession has used engineering experience add nice touches Shadow kit Shadows appearance reminds Falcon 880 its bigger Its 118-inch August1993 59 jim Moyfllflafl5 moaei OT 1~b unanuie Herring hang glider part EOGASE exhibit display National Soaring Museum Shadow 118 Open Class contest sailplane designed Roger Chastain threemeter-span ship thermal duration contest flying sport flying Shadow 118 kits pre-sheeted wings stabs rudder minimize building time Ben Clerx latest Mako Semikits available Ben 1, 2 K 3I/ h z 4 Left Three-view Mako latest design Ben Clerx Above Ben Clerx L Roger Lackey seem justly proud Makos Both guys belong Harbor Soaring Society southern California Interested Soaring Electric Flight Great So Are Northeast Sailplane Products carry comprehensive line silent flight prod ucts industry sell RIO Sail planes Electrics related accessories reference features hundreds products doz ens informative articles technical infor mation great sport RIO silent flight can meet needs abilities beginner expert dedicated pro viding personal customer service Check out NSP. youll glad did Welcome world NSP first open unique reference will awe number quality products have Also ordering us easy fun because help step way order reference mail $700 $5 plus $2 s&h NSP Well ship reference via express mail arent completely satisfied simply send back prompt courteous refund Northeast Sailplane Products 16 Kirby Lane Williston Vermont 05495 Northeast Sailplane Products 1993 RC Soaring Electric Reference N Price $5 Northeast Sailplane Products irby Lane Williston VT 05495 C802 658-9482 comprehensive reference Radio Control Soaring Electric Flight wingspan six inches longer Falcon wing area994 square inchesis well over 100 square inches greater Shadow uses todays popular thermal airfoil SD7037 Fuselage dimensions Shadow Falcon virtually identical Shadow kit first batch build-em-yourself obechi-over foam wings Current kits have prebuilt wings molded wing tips really good deal because much money save lot construction time end up lighter finished glider Shadow weighs 78 ounces giving dry wing loading 115 ounces per square foot pre-sheeted wing kits weigh about 70 ounces loading will right around 10 ounces per square foot should ideal dry wing loading low wind conditions Ballast can added fuselage wind picks up about 10 mph though Shadow didnt have pre-sheeted wings everything kit beautifully fabricated building instructions complete con structing wings took bit time actually interesting operation because got guts speak used F Z Lam epoxy bagged wings Theres about bagging obechi come no conventional spar wing brass joiner tube carried between -inch ply root rib /8-inch sub-rib six inches out spar tapered strips fairly heavy unidirectional carbon fibertwo top bottom dont know construction same used pre-sheeted kits Ive found wings super-stiff fuselage excellently formed fiberglass trimmed fit canopy Finishing fuselage conventional except Roger has make three little foam plugs hold pushrod tubes proper places along fuselage sides Thats good idea wing joiner V-inch-round 14inch-long piece high-strength 7075T-6 aluminum dihedral angle bent fit between joiner brass wing tubes perfect like shake assembled gliders see anything sounds loose Shadow doesnt rattle its solid respects first wondered about strength aluminum joiner its proven adequate Neither joiner nor wings show much deflection during launch fact Shadow about best launching plane Ive flown must happy combination towhook location wing stiffness airfoil etc ship wants climb straight up building instructions Roger mentions son Blayne prefers rearward towhook location first launch scared because soon model left hand took off straight up like kite strong wind instant visions old stall snap roll over trick didnt though Flying Shadow 118 lot fun As just mentioned launching can exciting really no sweat once get sticks Good zooms easy after learn tim ing full winch pedal dive/acceleration pull-up Off tow Shadow handles much like Falcon 880 except think its easier fly say easier mean once center gravity CG stab settings dialed Shadow overly critical pitch control couple clicks up down stab trim change flying speed bit dont make terribly dramatic difference plane performs Also additional size weight Shadow give momentum help keep going its pointed doesnt skitter around still shows clearly encounters lift Once lift Shadow excellent climber no problem staying cored coordinated thermal turns after aileron differential coupled rudder adjusted liking Just personal aside impression first flew heavier ships like Mueller Comet 89T reminded driving Cadillac Everything smooth stable solid Shadow gives some feeling too Continued page 63 60 Model Aviation oaringlBlakeslee Continued page 60 can sort motor around sky giving up lot altitude say lift-to-drag L/D ratio very good Since no free lunch what give up heavier ship ability float out early morning no-lift situations However 10 ounces per square foot pre-sheeted wing kit Shadow rates medium wing-loading glider should perfect conditions Landings pretty much same routine flapped ships key getting model slowed down establish ing glide angle/flap setting depends wind speed Low wind speeds require flap shallower final glide youre going too fast approaching spot Higher winds mean lower ground speed need less flap steeper glide angle penetrate spot Shadow behaves quite nicely landing pattern glide angle can easily adjusted flap stick its just matter lots practice get timing down all-important 100point precision spot landings computer radio strongly recom mended ship like Shadow because electronic mixing makes setting up flying lot easier Coupled flap/down-elevator compensation big help because flaps go down nose wants come up Up ailerons coupled down flapsthe crow configurationis another helpful option adds drag helps glider sink think Shadow 118 excellent choice all-around thermal contest ship glider just have fun Kits available $35995 exclusively Northeast Sailplane Products new two-meter version Shadow also available $27495 NSPs address 16 Kirby Lane Williston VT 05495 call 802 658-9482 Mako Ben Clerx Ben has Californias successful competition pilots Last year won hotly contested Fall Soaring Festival Visalia old Falcon 880 Ben has developing own designs over past few years latest version Mako very pretty bird good example current thinking California contest soaring scene Ben has switched obechi-sheeted foam wings Although such construction may high tech glass-bagged wings obechi works fine straight thermal ships because can built lighter quite serviceable Anyway its always instructive see what top guys doing because obviously spend lot time hobby always figure out best tricks before rest us Bens description new Mako Mako competition sailplane designed precision duration thermal contests F3J competition using slightly longer 118-inch wingspan retains crisp responsive handling characteristics F3B-type sailplane fourth version design series goes back 1987 con struction third version Dazzle too complex builders needed simplified glass-bagged wings $90 carbon-fiber spar system Construction Mako similar other competition sailplanes intended advanced-to-expert builder pilot main design objective have plane would easily max thermal duration requirements cover plenty ground search lift should also responsive aerobaticnot fight off boredom after skying out also improve all-important landing scores 5D7037 airfoil 10 22 ounces per square foot will give required flight times lightest lift conditions flat wing triple-tapered leading edge has no tip stalling tendency tracks though rails during landings particularly gusty winds Although polyhedral tips winglets make Continued page 64 August 1993 63 UFM Ultimate Fun Machine LEX Electric powered N/C ultra-light s-off stable anybody can fly mbles easily evening All prefabricated components No painting no sanding necessary Two kit versions available #31 74 Skyflex Basic Kit #3184 Skyflex electric power system prewired motor on/off switch Required inexpensive accessories 2-channel aircraft radio 7-cell nicad battery Battery charger see 93 Robbe catalog details lie 170 Township Line Road Belle Mead NJ 08502 908 359-2115 Call nearest Robbe Dealer N-200AAA2200 N-150N2150 N-11OAA2110 N-270AA2270 N-600AA2600 N-500A2500 N-6SOSC2650 KR-2000C2 2000 KR-AAOOD2 4400 OAAE2700 N 225AE2225 KR 600AE2600 KR 1000AEL21000 KR-1200AE21200 KR-1700SCE21700 KR-2400CE22400 N-600SCR12600 N-1000SCR12900 N-1AOOSCR121400 N-1500SCR121500 N-hOOCh121100 N-1800C1T121800 N-400000124000 - Specify Solder labs AN-SOAAA AN-i SON 4N-200AAA AN-i 1OAA AN-225AE 4N-270AA 4N-600AA 4 N-i SO-AAE AN-SOOA AN-600AE AN-800AR AKR-1000AE 4 KIT- 1 200AE N-650SC 4N-1000SCR 4KR-1300SC AN-i AOOSCR 4KR- 1 700SGE AKR-2000C AKR-2400CE 4KR-2800CE 4 KR-A AOOD 4KIT-S500DE 5N-SOAAA SN-lOON 5N-1 1OAA SN -2 7OAA SN -600AA SN-750AAE SN -500 SN-600AE SN-800AR SKIT- 1 200AE SKIT- 1 300SC SN- 1AOOSCR SKIT- 2000C SKR-A400D SKR-SOOODE 4850 48150 48200 48110 48225 48270 48600 48750 48500 48600 48800 481000 481200 48650 481000 481300 481400 481700 48 2000 48 2400 48 2800 48 4400 48 5000 6050 60150 60110 60270 60600 60750 60500 60600 60800 601200 601300 601400 60 2000 60 4400 60 SOQO DIMENSONS Price DH 3940591200 3941720150 4531122150 551650150 5511161200 5431945100 6501094150 8661016300 99211735710 8661654250 9921929400 12722362700 127235431500 5431945200 650642250 6001094250 6501604300 6501909300 8661654375 9921929450 127223621000 6421909300 8661016325 8661299350 8661654350 8661929450 9921173425 9921929650 127223621000 FREE Charae FLAT895 FLAT/SQUARE895 FLAT/SQUARE895 FLAT/SQUARE895 FLAT/SQUARE 1095 FLAT/SQUARE 895 FLAT/SQUARE 895 FLAT/SQUARE 1095 FLAT995 FLAT1095 FLAT/SQUARE 1200 FLAT/SQUARE 1500 FLAT/SQUARE 1600 SQUARE1400 FLAT/SQUARE 1600 FLAT/SQUARE 1200 FLAT/SQUARE 1600 FLAT/SQUARE 1800 FLAT/SQUARE 2000 FLAT/SQUARE 2200 FLAT/SQUARE 2600 FLAT/SQUARE 3400 FLAT/SQUARE 4200 FLAT1200 FLAT1200 FLAT1200 FLAT1200 FLAT1000 FLAT1250 FLAT1200 FLAT1500 FLAT1500 FLAT1900 FLAT1500 FLAT1900 FLAT2400 FLAT4000 FLAT5000 U WU rz lIEU U vz 8N600AA966001X8 AA 1800 8N600AA966002X2X2 high 2000 8N750AAE967501X8 AA 2200 8N7SOAAE967502X2X2 high 2200 6N-800AR72800FLAT2000 6KR-1300SC721300FLAT1800 7KR-13005C841300FLAT2000 6N-1A00SCR721400FLAT2200 7N-1A00SCIT841400FLAT2500 6KR-1700SCE721700FLAT2800 7KR-1700SCE841700FLAT3100 6KR-2000C722000FLAT3000 6KIT-4400D724400FLAT5000 6 Volt12AH81200 12 Volt60AH$1000 RO Oiants/deVries Continued page 62 information must specific point scattergun approaches must avoided subject well-defined contact National Air Space Museum Archive Division Room 3100 MRC 322 WashingtonDC 20560 few weeks printout what have bird will sent along ordering instructions course its going cost paper copies drawings microfilm reels information will well worth effort sincere thanks Brian good info RC SoaringlBlakeslee Continued page 63 aileron-equipped plane stable easier fly add drag reduce planes maneuverability Advanced pilots dont need training wheels lack bent up tips made possible increase aileron area roll response landing accuracy Couple flaps ailerons via computer radio some great aerobatics RG-15 airfoil once thought F3B speed airfoil thermals quite well lower wing loadings using camber control has excellent speed range think choice SD7037 RG-15 airfoil covers two best airfoils available thermal soaring fiberglass fuselage obechi-over-foam-core wings Makos construction straightforward typical current high-tech sailplanesbut no high-tech tools required Four wing-mounted servos operate flaps ailerons two fuselagemounted servos operate rudder stabilizer within slip-on nose cone two-panel wing incorporating wooden built-up spar Kevlar carbon fiber joined hardened steel rod obechi sheeting can applied stacking weight pressing between foam-core beds better using vacuum-bag system Foam-core full-flying stabs sheeted balsa obechi built-up rudder round out Makos construction am producing limited number Mako semikits kit contains fiberglass fuselage wing stab foam cores hardware Kevlar carbon fiber can order obechi veneer wing sheeting Daves Wood Products 12306 Bergstrasse Leavenworth WA 98826 Tel 509 548-5201 remaining bits balsa plywood probably lying around shop interested Mako semikit please write price Still documentation kickif need know about Northrop P-61 Black Widow let plug latest book ViP Publishers Inc PO Box 16103 Colorado Springs CO 80935 Dick Phillips yours truly have published Dave McLarens history big WW II night fighter 128-page book tells P-61 story along 70 photos threeview Widow book $1695 plus $250 postage handling working another McLaren book present subject North American F-82 Twin Mustang its various configurations Hope youre enjoying big bird flying season roximately $185RB] availability Ben Clerx 39 Seabrook Cove Newport Beach CA 92660 Mako flight report Roger Lackey want second opinion Mako slightly edited report found Plane Rap newsletter Harbor Soaring Society Pete Young editor Makos construction similar other planes its class its flying honestly best plane Ive ever flown Ive six other Open-class sailplanes flew very well because subtle differences engineered Mako outperforms What helps improve landings flat wing design tips-up planes can experience good amount polyhedral effect flying landing especially slight crosswind Mako s flat wings have very little tendency wallow around landings very crisp controlled Some people think flat wings susceptible tip-stalling just doesnt happen Mako couple times have turned too tightly low speeds has happened plane slipped little resumed flying fact plane gentle its third flight transmitter placed ground plane flew unassisted about minute before starting gentle bank right Thermaling plane very nice too wings signal lift extremely well light conditions feeding little camber really slows down climbs little trailing edge reflex helps penetration its no speed demon plane can still move out required Having flaps ailerons coupled slightly gives added roll authority allows nice tight aerobatics does launch Nice straight high doesnt want drop tip stall anything nasty just wants go up strong spar construction provides confidence go launch get top light downwind conditions Continued page 66 64 Model Aviation BATTERIES VISA MASTERCARD DISCOVER $400 SHIPPING & HANDLING 6% SALES TAX FOR FL RESIDENTS m five minutes can upgrade stan dard Futaba Airtronics servos ball bearing servos new EMS Ball Bearing Conversion Kit New case tops accurately molded supertough glass filled fuel-proof Celcon include top quality stainless steel ball bearing servo output shaft * Stops case top and/or plastic bushing wear * Prevents output gear shaft shimmy * Reduces friction improves servo centering * Enhances performance airplanes boats & cars Mandatory helicopter servos * Free output arm provided case top * Guaranteed against breakage year * pay $3995 $2995 BBC-1 Fits FUTABA 528/5 128 S38/S138 S48/S148 Servos set 4$2595 BBC-2As above set I$695 BBC-3Fits AIRTRONICS 94102 Servos set 4$2595 BBC-4As above set I$695 BBC-5Ball Bearing Only JR 501 507 RCDAPOLLO 05 10 FOCUS HS300 HS500 ACE 330342 342HS TOWER TS-5 Servos set 4$1995 Add $300 Shipping Handling orders nne714 692-1393 Info Onlycalifornia Residents Add 775% Sales Tax 800 845-8978 Orders OnlyVISA MASTERCARD Accepted 58 Engine $59500 42 Engine $52500 32 Engine $45000 26 Engine $45000 $1200 Shipping Engine Test Ran 503 938-6743 Fax 503 938-6950 Rt 3 Box 242-A Milton-Freewater OR 97862 RC SoaringlBlakeslee Continued page 64 after ultimate survival depends being guy top food chain National Soaring Museum dedication Paul Schweizer sent letter saying National Soaring Museum NSM located Elmira New York held dedication its Evolution Gliders Sailplanes Exhibit EOGASE May 21-22 exhibit includes 122 models gliders sailplanes illustrate develop ment soaring its beginning 1895 until 1990 Paul chairman NSM Exhibit Committee Along brothers Ernest William founded Schweizer Air craft Company way back 1938 Paul said NSM has great reports model exhibit model builders well some designers hand dedication Paul also reported NSM now has Barnaby-Klemperer exhibit SSA Soaring Convention Seattle last year has -scale models Prufling Barnaby flew Blaue Maus Klemperer flew models built Paul Gibson Craig Aho Bellevue Washington Paul said superb Prufling model built original plans 1000 building hours spent st Sailplaners visiting New York States southern tier should plan stopping see National Soaring Museum RD #3 Harris Hill Elmira NY 14903 Tel 607 734-3128 Jim Moynihans 1896 Chanute-Hemng hang glider Fran Ptaszkiewicz Tonawanda New York sent photo Jims model Chanute-Herrtng hang glider now part EOGASE exhibit mentioned above Fran also sent following letter March Jim Moynihan Don Hobel drove down NSM Elmira Jim could personally deliver model Chanute-Hemng hang glider EOGASE exhibit Jim master model craftsman par excellence Paul Schweizer asked Jim build model day itself fantastic Paul Schweizer himself greeted us museum door escorted us down floor museum model diorama located presentation made Jims model added exhibit Paul made reservations us have lunch him nearby restaurant least three-hour lunch talk course about models full-scale gliders Paul pointed out two brothers modelers years before formed glider company late 30s said lot information new designs gleaned Continued page 174 66 Model Aviation Yoroa Linda U POWER WALKER MACHINE SCALE DOCUMENTATION are/Antlque/Classic Aircraft lOOts photos tOte 3-views rareuniqoatone kind Osatisfaction guaranteed _________catalog $200 US tonde Golden kws Models 927Od CO 80226 dee f/4krx6oo1 Learn fly planes private field Five 6 day course $350 Open year round Send SASE complete info Southwest RC Flying 2818 Carolina NE Albuquerque NM 87110505-832-6394 Bob Fiorenzej Hobby Center Inc UPS Orders Shipped Doily Dealer Yellow Aircraft Send $300 Yellow Info Peckege z digit Showyoom 135 mtn Dig World Full Line Hobby Accessonea 420 West SR 434 Winter Springs FL 32708407 327-0353 RC SoaringlBlakeslee Continued page 66 free flight models after company up going interesting times have ever Following lunch returned museum met curator took us restoration storage areas gliders repaired held pending changes museum displays Meeting Schweizer brothers listening history unraveled fantastic experience say day interesting would give credit Making obechi-sheeted wings Because current popularity sheeted foam-core wings obechi wood veneer thought would good time pass along few tips Ive picked up Obechi splits very easily need careful handling cutting Apply masking tape over cut lines make cuts sharp scissors Next coat both sides sheet Flecto Diamond Finish Varathane seal wood use high-gloss variety apply foamtype brush applying Diamond Finish first side obechi will curl up like potato chip Just keep going best can Immediately coat other side will flatten right out Hang sheet up paper clamps dry finishing pre-sheeted obechi wings like ones come Shadow Thermal Eagle kits apply heavy first coat Diamond Finish Untreated obechi acts like blotterthe coating can soak down epoxy allow softened obechi pull away bond Apply light coat Diamond Finish paper towel thin coat will allow polymers cross-linking thing seal wood can come back heavier coats loosening bond Three five coats wet-sanding between will produce nice glossy finish use E-Z Lam laminating epoxy Aerospace Composites apply obechi foam cores can spread plastic squeegee foam roller Just thin coat thats required Tape trailing edges together masking tape before beginning epoxy application Vacuum-bagging best way go because produces perfectly pressure surfaces Most obechi will applied white foam cores should use about six inches mercury vacuum pressure six inches mercury will crush white foam Vacuum gauges read inches mercury psi Six inches mercury equals about three psi equivalent load 1320 pounds wing size Falcon 880 Try putting bricks bench Aerospace Composite Products E-Z Vac Composite Structures Technology Mighty Mini Vac vacuum pumps fine bagging obechi See manufacturers ads addresses pumps run continuously set six inches mercury available individually complete bagging kit includes pump bag material tubing breather felt fittings better deal kits dont come vacuum gauge can buy extra wish E-Z Vac kit also includes pair very nice Quick-Lock plastic clips used seal ends bag bag accurate wing must start perfectly flat working surface solidcore exterior door usually good bet can often buy slightly damaged local lumberyard good price After placing wet wing assembly bag top side up sealing run pump just long enough get air out bag bag film should contact wing no vacuum yet Shut off pump smooth wrinkles out bag Place bottom foam bed under bag top bed top bag Both beds must positioned exactly under/over wing core Felt-tip pen marks should have made both ends blank core cut Eyeball marks ensure beds aligned perfectly core put flat board top top bed few pounds extra weight spread along board will ensure whole assembly pressed down good contact flat work surface idea make sure everything flat straight before vacuum applied Once vacuum applied item bag will shapeforever everything looks okay turn pump let run least 12 hours temperature shop below about 72 24 hours better Epoxy takes couple weeks fully cure best let wings sit beds flat surface four five days before working Good luck Model Aviation er & Bnglne Power Free FlIght Display Control Une Blectric Power RIC AIrplanes new Illustrated 32 page tabloId sIze catelog US & Canade $100 Forelgh $300 Pertn Volley Hobby Center 837-A W Mom St Lanodole PA 19446 215 3654770 WORLDS LARGEST SCALE PLANS & DOcUMENTATION SERVICE 100000 AIRCRAFt PHOTOS PLANS ENLARGING 130 SCALE PLANS ze 120 PAGE CATALOG $500 USA & CANADA $1000 AIR OVtRStAS Jim Peptttoo E PLANS AND PHOTO SERVICE 3209 MADISON AVE GREENSBORO NC 27403 l2925239 COPUIERIED AIRCRAII PLIS Technical Illustrations Suitable Framing Scale Drafting Scanning Servicu S Views D-TECI4 SYSTEMS Shawrsee Trail CatalogCat-tervflls IL 62910 6189852383 COMPLETE RIT S3500SPORT OR COMBAT Wt%G KITS tj7rO GENE SUE WINGSPANci WPcGAOGonitscLJfl PRODUCTS 318 7475331 Comport 5Mflg Metols Booko Pocciojon Inotnusents LATHES complete Catalog 5200 CAMPBELL TOOLS Co 2tOOMSeIms Rood Spnngfield OH 43505 AfrcandVSeaOIocaser 322s362 Obechi Large Sheets Please call 809-548-5201 send SASE 12306 Bergatrasse Leavenworth WA 98826