Jim Harrigan pilots Gentie Lady iight lift over picturesque New Engiand vaiiey SLOPE SOARING amazing seems like magic Sure scientific principles meteorology aerodynamics explain works throwing unpowered heavier-than-air model off hill running through aerobatic routine landing hour later does seem magical Slope Soaring offers lot RC fliers Its inexpensive buy no fuel generally fly simple airplanes simple radios Its exhilarating can fly howling wind other RC pilots grounded Its challenging have pay attention fly unpowered airplane 25mph wind once youve mastered basics can fly aerobatics try Combat pylon racing Some modelers hesitant throw model off rocky ledge dead-stick takeoff havent tried interested article explains survive slope lift works glider always descending relative its surrounding air mass can rise relative ground Left author flying Future Flight Kilngberg Wing moderate lift over abandoned highway overpass summer leaves trees upwind slope create enough turbulence make site unsuitable flying Right Bob Powers tests lift two-meter aileron-and-elevator-controlled Sailplane JIm Harrigan waits House Balsa two-channel glider 2x4 16 Model Aviation Lou Garwood about launch Sensoar teat lift amount available lilt gIven site varies wIth changing wind speed wind direction air mass rising faster glider falling condition exists thermals slope lift wind blows against slope airflow forced upward uphill flow creates source rising air supports birds sailplanes Gulls use slope lift fly miles along seacoast dunes single wingbeat Slope Soarers can same Wind enemy thermal glider pilot its friend Slope glider pilot starters youll need 8-mph faster wind blowing straight almost straight hillside Adequate lift depends wind speed slope shape also wind direction directly wind blows slope greater lift can fly slight crosswind maybe up 200 either way lift reduced skill required After initial right turn fiy parallel siope Lou makes 1800 left turn end circuit strongest lift found just above out front slope lighter model less lift needed sustain flight Its rare day theres too much wind because wind increases can fly smaller heavier faster models can stand up Bob Powers iaunches Coyote aileron-andelevator-controlled ship municipal land fill market 15 years Coyote quick smooth filer given sufficient lift can fly best way determine theres enough lift fly watch other Sailplanes second best way watch gulls hawks soaring over slope no other fliers human bird working slope test lift firmly holding model out lift front slope plane wants rise out hand April 1992 17 After final radio check Lou launches Sensoar straight-out lou air plane gains altitude immediately As glider continues climb Lou presses elevator stick forward down elevator prevent stall Spirit rudder-and-alieron-controlled two-meter Thermal contest Sailplane works weil slopes because its semisym metrical airfoil penetrates wind High Sierra two-meter rudder-andelevator-controlled ship clear canopy fiberglass fuselage Weighing models built-up wings pen etrates wind effectively jim Harrigan grabs isat flight day Gentle Lady very competent rudder-and-elevator-controlled ship quite suitabie first gilder N theres enough lift fly Aircraft selection Its important select model airplane suited wind conditions probably Slope Soaring power flying thermal gliding Light windsay 6 10 mphrequires light floater airplanes wing loadings about five eight ounces per square foot wing area category Culpepper Models Chuperosa Cox Silhouette Carl Goldberg Gentle Lady Hobby Horn Sensoar Bob Martin Bobcat Minimax Enterprise Minimax-700 Moderate wind 10 20 mph supports perhaps greatest variety airplanes both polyhedral alleron-controlled wing loadings six 12 ounces per square foot wind Ive great flights Dynaflite Freedom Future Flight Klingberg Wing Great Planes Spirit House Balsa 2x4 Bob Martin Coyote MFA High Sierra RC Products MC-3 Sig Ninja wind roaring 20 mph youll need specialized Slope Soaring ships tend smaller generally have wing loadings 10 ounces higher Examples DCU Dragonfly Douglas Aircraft Quicksilver Fly Night Shadow Bob Martin SR-7 models well moderate wind will fly high wind added weight Slope pilots learn bring lead sheet steel washers ballast Beginner Slope ships use simple radio system two servos controlling rudder elevator advanced models use two channels aileron elevator control Either control system fine basic flying ailerons needed aerobatics Flying wing models typically combine two controls set elevons servos wingeronlpitcheron models pivot 18 Model Aviation Lou Garwood Sig Ninja Lou learned rolls 50-in aileron-andelevator-controlled Sailplane Chuperosa 60-in light-air Slope ship designed hand-launched thermal compe tion can built either rudder-andelevator aileron-and-elevator controls Freedom all-balsa Slope Soarer has aileron elevator control plus speed brakes operated third servo yuu u ruuuy ior someining tarn ana aiieron-and-elevator-controlied Quicksilver Both Bob Powers acro batic Douglas Aircraft ship can fly inverted nearly well fly upright Bob puts Quicksilver through acro batic routine slope lift over Cape Cod bay Photo David Garwood Left typical Slope Soarer fashion Bob Martin Coyow iou elevator servo mounted fuselage aileron servo tne wing Right Peck-Polymers Genesis flying wing uses mechanical V-tail mixer move devon combined elevator aileron control surfaces Left plan-built Chandeil uses mechanical mixer front wing combines rudder elevator servo output control V-tail Another servo located above wing pivot wing roil control Ailerons used Right theory behind use pivoting wingeron instead ailerons roil control moving large surface just little creates less drag moving small surface lot Bob Martin RC Coyote soars slope lift over roiling Hudson River valley hills up state New York Photo Dave Garwood 7 Sig Ninja soars high over Atlantic Cape Cod National Seashore reservation Lou Garwood stays control shore Photo Dave Garwood Sensoar riding slope lift Hudson River Valley Photo Paula Garwood Lou Garwood launches Sensoar 18-foot hill some inland Slope Soaring Photo David Garwood wings together provide pitch control pivot opposite directions roll Continued page 148 Another photo Lou putting up Sen soar Hobby Horn fioater designed light winds Photo David Garwood April 1992 19 Another photo author flying Kling berg Wing inland lift off abandoned highway overpass Photo Rudy Coletti UU0j U 0 OQ 0- 0 0 0 0 - 0 i 0 P -o- g 0 0 0 l 00 U~ 2 _ 0 -2 0 0 0 0 - 0 a bCD 3 0 - 0 oo ~ o 00 0S0UU 0~U o U0 ~0p 0 0 0 0 0 - o0~ 0 00 U S) .tU0-t 00 0 -t0 0 000i 0 0~ 0 00 o 0 2 -i 0 2 - 0 0 Oo U -0 00 P 00 U ~U00- U 0 oea 0 00 0 00 0 C C p4 0 -4 n SI 0 -5 0 N -4 b b C, C 0 C C C3 C C 000 W xxx 0 C M 0 0CO 0 04400-4-4-4-4 0NC30N~400O0 b C -4 x Mxxx xxx xx x M 0 Mx 0-x Mx 0x x 0 M M . CO MMMMMM 0CCC4W xxCaCxaaaxxxNNNCCC xxxxxxxx -40 C000000-4NNCCC3CCM 0-4-4N00NM0 3-4-4N3 0NNC7CN 0 0C000N0MC0-0 0CCCC~CC4CCC4CC xxxxx00xxx ~xxxxxxxxx0)xx000xxx xxxxx MMM-4-4-4CC4C4-4C-4 0 4-N -4N0-4 00 0 OON0CN0CCO ~N-4-4N N000000N0bCN0NCN~M4 CCMCMb 0M0C0-401 N 4 CCCC N MOO 4 0 N N CoN-4 -4 C -4 -40 x x -4 cc 0 mm 0 000a S 0 C C 0 -4-4-4-40 00000 C N -40 C C40N x0xx 2 NN0 4. C MM C M 4C-4-4 04-4C-CC0NN-4 CM0-C 000-4CCCCC C C C C C C C C C C C MM MM N50Np W xxxxxxxx00000 0 ~4xxxxx 0 C MM0 0 NN&MM~ 0 MM 00 N 00 N 004. C C 0 0000000MO00ON u 0 P0 o W C o 00- 0 x 00 0 C r M -5 CC0 C/ r 00 0o C [ ~IIII 0000000000 000000000 W 000 NNN ~M0 0 -4-4-4 0N 0000 CCMMM--4-- 0CC3MN-4 xxxxxxxxOxxxx- 0 M 0 w 0 0 0 w 5 0 0004.M 0M 0 C 4 0C0OM N N N N N 0CC x x M-4 N N C - 0-4 0 000 C0 4000000 O00N0C-0 00 CO 0 4 0 C 0 0 x0xMx0x C xxx. 0M-M-4M-4M CDxMxMxMx CO0x0xMxM 50 0 N00~ N0CMN0CNN400C4N 0 0 ONOCCCCMMO -4M0CM000M0C0C t0C0 C M 00 MC -4 00 0 0 C C MM MM MM MM 1 C C 0 C~CM 0-4-4CCCC x x 000x x x x 0x x x xxxx 4CC44 0 0 C- C, 4 0 C 0 U w C -n H ni 0 C 0 rn -I m 0 w 0 x C C 0 w 0 m z C N 0 N C 0 C N 0 CJ C 0 N CD Gm 0 C0-G zo 11 c20 0 1 0 0 0 0- 0 CcD U o C UU inC 0 U Co 0 0 1 00-ri C-4 130 I0 Z5 rn 0ir1 i-rn 13 II rn models landing area selected radio step confidently edge hill give model firm toss slightly downward direction Yes downward need airspeed altitude point model may balloon upward suddenly prepared push elevator stick forward prevent stall lift model will soon back above hill dont have enough airspeed solid control will crash After few seconds build up speed turn airplane 900 flying parallel slope model will continue gain altitude flying above out front hill Before model becomes too small see make 1800 turn away hill pass front launch position other end circuit make another 180 turn again away hill Youre now flying basic Slope Soaring pattern Seen above its figure eight always turning wind turn wind keep airspeed up ground speed down turns avoid being blown back over hill Being blown back over hill just about worst thing can happen now because lift decreases rapidly turbulence increases sharply behind hill Ill tell about handle section landing Flying slope lift Once youve launched established flight pattern may want explore limits lift zone Generally lift strongest just above slightly out front hill tapers off go higher decreases go farther out Usable lift can range few feet three times height hill 200 feet out front Finding limit lift zone front hill difficult because tapers off gradually Just fly out until gently begin settle bring model back stronger lift stay aloft Flying behind hill hazardous take pains stay out front gain altitude turning smoothly flying strongest part lift strong lift can get up twice height hill two passes weaker lift may take passes gaining foot two time reach crnising altitude reduce altitude mainly intentionally flying areas weaker lift can also lose height raising nose slightly increasing wings angle attack presents flat surface airstream reducing lift speed maneuver similar landing flare precaution same Dont overdo youll stall What once youve got basics aerobatics course Almost anything can done fuel-powered model can done Slope Soarer have experience Tell Control Horn Go Wont Get Bent Out Shape 0 airplane enthusiast know has same problems control horns flex bend break-what else new Introducing Sullivan 555 toughest control horn ever made Craftecl7with tempered steel instead plastic nickelplated wear resistance Sullivan Control Horn 555 built exacting specifications eliminate flex flutter Better still comes complete ass-filled nylon bushing prevent metal-to-metal contact radio interference sized fit either devises Sullivans New Ball Joint System easy off-axis movement Sullivan 555 Finally control horn 1 PRODUCTS thats made right stu 11 P0 Box 5166 Baltimore MD 21224 Getting Better Ideas Off Ground long-wing thermal gliders will probably try loops first Pilots powered models may prefer rolls first departure straight-and-level Before performing either maneuver gain some altitude begin shallow dive build up speed Inverted passes cool flying whole figure-eight pattern inverted supercool Immelmann turns split-Ss Cuban-eights well within performance envelope fast aileron-and-elevator-controlled Slope ships Landing Remember model airplanes rarely get broken flying its contact ground causes casualties Since its hard fly airplane scanning ground find good spot makes sense select landing area before launch three basic landing locations bottom slope itself top What youll need flat spot few trees bushes fences better big flat soft no obstructions First choice beginners land bottom Its safest spot theres enough flat space although may easiest because model harder see distance Start landing flying out away hill leaving strong lift zone model will gradually lose height altitude decreases lift turbulence reduced youre ready land parallel hill turn wind April 1992 149 its Best New OPS 120 four cycle engine its New high lift cam engine proud precision produced long life dependable service Its high torque makes ideal large scale models OPS VS Parts Are Readily Available Part Cometuim ftO44 9c land model would other Landing slope face requires precise control saves walking bottom slope free brush other obstacles fly lowwell below hilltop area reduced lift model will slow down lose altitude fly close hill let model drift upward rising air As climbs loses airspeed airplane reaches point slightly above desired landing spot youre flying foot two ground put nose down grease er its flat enough big enough top hill offers good visibility familiar landing pattern fuel-power thermal glider pilots also offers hazardous condition Slope flyingthe dreaded rotor area minimal lift intense turbulence typical landing approach top gain plenty altitude fly downwind leg time turn downwind away slope face lose altitude crosswind leg make final approach wind trick maintain control flying through diminishing lift increasing turbulence pilot must keep airspeed up maintain control Im kidding about safety airspeed flying through turbulence Youll landing hot land top bill youll need quick fingers safely compensating advantage landing top dont like approach can go aroundsomething generally cant thermal glider landings can warm up flying high approaches instead landing shoot out over edge back slope lift Practice few passes coming down lower time until get hang make low pass actual landing Like lift zone front hill turbulent zone behind hill limited size rotor intensity tapers off move away edge have truly large flat area top hill can fly over rotor land behind typical thermal glider landing choice landing areas depends much personal preference experience topography Ive seen three types landings made three different pilots flying same hill same day Parting thought warning Youve got airplane selected siteand today have wind Add thing repair kit CyA cyanoacrylate glue five-minute epoxy fiberglass cloth Slope flying hard models field repairs can get back air Dont afraid take beat-up models slope theyre sure receive punishment Good looks dont count first year Slope Soaring lift cooking youll want flying instead watching Slope Soaring definitely participant sport definitely addictive Once try may never again satisfied ordinary RC flying References further reading 1 Dave Thornberg Old Buzzards Soaring Book Pony X Press 5 Monticello Drive Albuquerque NM 87123 Two chapters Slope Soaring great writing style 2 Dave Jones Radio Controlled Gliding Argus Books 1 Golden Square London England WiR 3AB Two excellent chapters Keith Thomas Slope Soaring 3 Dave Hughes Radio Controlled Slope Soaring Chart Hobby Distributors Littlehampton West Sussex UK Continued page 1S2 150 Model Aviation 4 0 e AERIAL MODEL AIRCRAFT PRODUCTS AMAP cutter bowl$17900 213 965-9504I AMAP power supply$4900 Anodized available Add$1000 Three-piece fuse T tailor V tail also sell cut cores available airfoils MH42 MH43 MH62 MH64 7003 RGI5 RGI4A Foam cores $5000 soaFull Money-Back 30$35Cfl antee 5 $45 FLAIR SLOPE 11/SPORT ELECTRIC eComplete S6000 Length43Wd h3Hegh 4O&W5ize1otorRjnded Shp-on Nose Cone Fuselage made EZ Lam Epo Density96 X 2 $2900 Aerospace composite PrixtictsBlue Foam 2 lb24 X Will cut shipping 12 X 48 please specify Bob Rntzlaff 1641 South Elismere Ave Los Angles CA 90019 ASW 17 1/4 Scale 4 M Basic Kit $28500 Thermal Phase Hand Launch 60 E 387 $5000 BflNAJER RIRCRRFT DESIGNS BRB KITS FLY BEST WS 52 1050 sqin Length 54 Weight 9511051b UltimatePRICE $295 KITS INCLUDE Epoxyglass fuse bellypan cowl cock pit lpants applicable Virgin bead foam wing cores wings 1 piece internal formers machine cut birch ACR t ply Illustrated construction manual Clear butyrate canopy Preformed T-6 aluminum landing gear Plug stab kit TO ORDER CALL 215-759-3179 5717 Sullivan Trail Nazareth PA 18064 VISA/MC ACCEPTED definitive work 17 chapters five appendices 4 Stan Eames Sal DeFrancesco Slope Soaring Inland Sites NSP 1991 Northeast Sailplane Products catalog Northeast Sailplane Products 16 Kirby Lane Williston VT 05495 Note British publications listed available US booksellers yes want write about Slope Soaring does help name Dave ng Fun/Mathews Continued page 47 SO WHAT R VA BUILUN Ever notice thats first thing two dedicated modelers ask other meet during winter months Sure intensely dedicated sorts wh fly feet snow temperature below 30 F0 us prefer spend modeling time warm shop cold winter days building things fly weather becomes hospitable also awfully good days spending some time repairing little things last flying seasons models temporary repair can fixed correctly worn-out components replaced radio equipment returned repair station annual servicing course batteries cycled month Im growing about half paranoid over hinges Last flying season seemed hinge year total wipe-out prototype aileron fell off managed land another model rudder hanging pushrod another instance did usual pre-flight pull test have elevator come loose fingers dont think its fair condemn particular brand hinges last seasons troubles Rather think blame lies lots use own poor technique point never preswne hinges tight check ON SAFETY CHECKS brings another thing mind As anyone has flown IMAA event knows group insists safety checks before allowing model fly would least presume fly big models would well above average construction maintenance skills Yet nearly fly-in Ive attended safety inspectors have discovered least model defects would have endangered model spectators other pilots well Some fliers seem offended safety checks seems rather vain Regardless well model built maintained well owner has pre flighted host things might miss Its redundancy thing see times something inspected less likelihood some little detail slipping Thats called quality control isnt Frankly can speculate safety inspections arent part fun fly scene Id sure hate hurt someone hurt someone result some little thing failing because Id grown accustomed looking no longer really saw Wouldnt JUMBO RUBBER POWER month coincidence have 1WLK WIAVLFOAMAIRE 10 SPAN 30-33 LBS 50-75 CC POWER 74 IN WING SPAN 6-7 LBS 45-60 POWER 10 SPAN ,o-42 CC POWER 5-10 LB PAYLOAD OPTIONAL SPREADER4 CH PLY FOAM AND BALSA WOOD CHOOSE 3 UM 4 1 SLOW AND STABLE KIT $26995 SPDKiT$1995 T $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOG T 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERS tpIanecompaaIv SA/MASTERCARD 152 Model Aviation EChu8hcket30Th4eIt 0 N S Y Issa 30AbI8hfl 90 TS CtIW04sI w 6,-~99o SET POSP&H 0,4sOT.WARNING AIRCRAFTIRADIO ID LABEL SETS Identify yaur aircraft per AMA safety rules Sef stc abe s am 0as81088818 $4ooar8n Send eke onee S3ndoIes 950aM $4850 0888810 t9SOPIus 08040 $090 toBaadus Ernepoeo P080 8 NOVa C NY 002 LATNES MILLS METALO BOOKS -PRECIOION TNSTAUMENTS COMPLETE CATALOG $2 00 Ts stems 000011 5beRad c 4I50aoyfald OH 4550$ COMPAC5528562 WS 66 883 sqin 90 108 2U 120 41 Length 60 Weight 95/1051b Also Avail able Extra 230 Version Extra 3XPRICE $240 WS 66 -883 sqin Length 59 90 108 2C 120 4C Weight 95/lOSIb Sukhoi SU-26MPRICE $240 Continued page 154
Edition: Model Aviation - 1992/04
Page Numbers: 16, 17, 18, 19, 148, 149, 150, 152
Jim Harrigan pilots Gentie Lady iight lift over picturesque New Engiand vaiiey SLOPE SOARING amazing seems like magic Sure scientific principles meteorology aerodynamics explain works throwing unpowered heavier-than-air model off hill running through aerobatic routine landing hour later does seem magical Slope Soaring offers lot RC fliers Its inexpensive buy no fuel generally fly simple airplanes simple radios Its exhilarating can fly howling wind other RC pilots grounded Its challenging have pay attention fly unpowered airplane 25mph wind once youve mastered basics can fly aerobatics try Combat pylon racing Some modelers hesitant throw model off rocky ledge dead-stick takeoff havent tried interested article explains survive slope lift works glider always descending relative its surrounding air mass can rise relative ground Left author flying Future Flight Kilngberg Wing moderate lift over abandoned highway overpass summer leaves trees upwind slope create enough turbulence make site unsuitable flying Right Bob Powers tests lift two-meter aileron-and-elevator-controlled Sailplane JIm Harrigan waits House Balsa two-channel glider 2x4 16 Model Aviation Lou Garwood about launch Sensoar teat lift amount available lilt gIven site varies wIth changing wind speed wind direction air mass rising faster glider falling condition exists thermals slope lift wind blows against slope airflow forced upward uphill flow creates source rising air supports birds sailplanes Gulls use slope lift fly miles along seacoast dunes single wingbeat Slope Soarers can same Wind enemy thermal glider pilot its friend Slope glider pilot starters youll need 8-mph faster wind blowing straight almost straight hillside Adequate lift depends wind speed slope shape also wind direction directly wind blows slope greater lift can fly slight crosswind maybe up 200 either way lift reduced skill required After initial right turn fiy parallel siope Lou makes 1800 left turn end circuit strongest lift found just above out front slope lighter model less lift needed sustain flight Its rare day theres too much wind because wind increases can fly smaller heavier faster models can stand up Bob Powers iaunches Coyote aileron-andelevator-controlled ship municipal land fill market 15 years Coyote quick smooth filer given sufficient lift can fly best way determine theres enough lift fly watch other Sailplanes second best way watch gulls hawks soaring over slope no other fliers human bird working slope test lift firmly holding model out lift front slope plane wants rise out hand April 1992 17 After final radio check Lou launches Sensoar straight-out lou air plane gains altitude immediately As glider continues climb Lou presses elevator stick forward down elevator prevent stall Spirit rudder-and-alieron-controlled two-meter Thermal contest Sailplane works weil slopes because its semisym metrical airfoil penetrates wind High Sierra two-meter rudder-andelevator-controlled ship clear canopy fiberglass fuselage Weighing models built-up wings pen etrates wind effectively jim Harrigan grabs isat flight day Gentle Lady very competent rudder-and-elevator-controlled ship quite suitabie first gilder N theres enough lift fly Aircraft selection Its important select model airplane suited wind conditions probably Slope Soaring power flying thermal gliding Light windsay 6 10 mphrequires light floater airplanes wing loadings about five eight ounces per square foot wing area category Culpepper Models Chuperosa Cox Silhouette Carl Goldberg Gentle Lady Hobby Horn Sensoar Bob Martin Bobcat Minimax Enterprise Minimax-700 Moderate wind 10 20 mph supports perhaps greatest variety airplanes both polyhedral alleron-controlled wing loadings six 12 ounces per square foot wind Ive great flights Dynaflite Freedom Future Flight Klingberg Wing Great Planes Spirit House Balsa 2x4 Bob Martin Coyote MFA High Sierra RC Products MC-3 Sig Ninja wind roaring 20 mph youll need specialized Slope Soaring ships tend smaller generally have wing loadings 10 ounces higher Examples DCU Dragonfly Douglas Aircraft Quicksilver Fly Night Shadow Bob Martin SR-7 models well moderate wind will fly high wind added weight Slope pilots learn bring lead sheet steel washers ballast Beginner Slope ships use simple radio system two servos controlling rudder elevator advanced models use two channels aileron elevator control Either control system fine basic flying ailerons needed aerobatics Flying wing models typically combine two controls set elevons servos wingeronlpitcheron models pivot 18 Model Aviation Lou Garwood Sig Ninja Lou learned rolls 50-in aileron-andelevator-controlled Sailplane Chuperosa 60-in light-air Slope ship designed hand-launched thermal compe tion can built either rudder-andelevator aileron-and-elevator controls Freedom all-balsa Slope Soarer has aileron elevator control plus speed brakes operated third servo yuu u ruuuy ior someining tarn ana aiieron-and-elevator-controlied Quicksilver Both Bob Powers acro batic Douglas Aircraft ship can fly inverted nearly well fly upright Bob puts Quicksilver through acro batic routine slope lift over Cape Cod bay Photo David Garwood Left typical Slope Soarer fashion Bob Martin Coyow iou elevator servo mounted fuselage aileron servo tne wing Right Peck-Polymers Genesis flying wing uses mechanical V-tail mixer move devon combined elevator aileron control surfaces Left plan-built Chandeil uses mechanical mixer front wing combines rudder elevator servo output control V-tail Another servo located above wing pivot wing roil control Ailerons used Right theory behind use pivoting wingeron instead ailerons roil control moving large surface just little creates less drag moving small surface lot Bob Martin RC Coyote soars slope lift over roiling Hudson River valley hills up state New York Photo Dave Garwood 7 Sig Ninja soars high over Atlantic Cape Cod National Seashore reservation Lou Garwood stays control shore Photo Dave Garwood Sensoar riding slope lift Hudson River Valley Photo Paula Garwood Lou Garwood launches Sensoar 18-foot hill some inland Slope Soaring Photo David Garwood wings together provide pitch control pivot opposite directions roll Continued page 148 Another photo Lou putting up Sen soar Hobby Horn fioater designed light winds Photo David Garwood April 1992 19 Another photo author flying Kling berg Wing inland lift off abandoned highway overpass Photo Rudy Coletti UU0j U 0 OQ 0- 0 0 0 0 - 0 i 0 P -o- g 0 0 0 l 00 U~ 2 _ 0 -2 0 0 0 0 - 0 a bCD 3 0 - 0 oo ~ o 00 0S0UU 0~U o U0 ~0p 0 0 0 0 0 - o0~ 0 00 U S) .tU0-t 00 0 -t0 0 000i 0 0~ 0 00 o 0 2 -i 0 2 - 0 0 Oo U -0 00 P 00 U ~U00- U 0 oea 0 00 0 00 0 C C p4 0 -4 n SI 0 -5 0 N -4 b b C, C 0 C C C3 C C 000 W xxx 0 C M 0 0CO 0 04400-4-4-4-4 0NC30N~400O0 b C -4 x Mxxx xxx xx x M 0 Mx 0-x Mx 0x x 0 M M . CO MMMMMM 0CCC4W xxCaCxaaaxxxNNNCCC xxxxxxxx -40 C000000-4NNCCC3CCM 0-4-4N00NM0 3-4-4N3 0NNC7CN 0 0C000N0MC0-0 0CCCC~CC4CCC4CC xxxxx00xxx ~xxxxxxxxx0)xx000xxx xxxxx MMM-4-4-4CC4C4-4C-4 0 4-N -4N0-4 00 0 OON0CN0CCO ~N-4-4N N000000N0bCN0NCN~M4 CCMCMb 0M0C0-401 N 4 CCCC N MOO 4 0 N N CoN-4 -4 C -4 -40 x x -4 cc 0 mm 0 000a S 0 C C 0 -4-4-4-40 00000 C N -40 C C40N x0xx 2 NN0 4. C MM C M 4C-4-4 04-4C-CC0NN-4 CM0-C 000-4CCCCC C C C C C C C C C C C MM MM N50Np W xxxxxxxx00000 0 ~4xxxxx 0 C MM0 0 NN&MM~ 0 MM 00 N 00 N 004. C C 0 0000000MO00ON u 0 P0 o W C o 00- 0 x 00 0 C r M -5 CC0 C/ r 00 0o C [ ~IIII 0000000000 000000000 W 000 NNN ~M0 0 -4-4-4 0N 0000 CCMMM--4-- 0CC3MN-4 xxxxxxxxOxxxx- 0 M 0 w 0 0 0 w 5 0 0004.M 0M 0 C 4 0C0OM N N N N N 0CC x x M-4 N N C - 0-4 0 000 C0 4000000 O00N0C-0 00 CO 0 4 0 C 0 0 x0xMx0x C xxx. 0M-M-4M-4M CDxMxMxMx CO0x0xMxM 50 0 N00~ N0CMN0CNN400C4N 0 0 ONOCCCCMMO -4M0CM000M0C0C t0C0 C M 00 MC -4 00 0 0 C C MM MM MM MM 1 C C 0 C~CM 0-4-4CCCC x x 000x x x x 0x x x xxxx 4CC44 0 0 C- C, 4 0 C 0 U w C -n H ni 0 C 0 rn -I m 0 w 0 x C C 0 w 0 m z C N 0 N C 0 C N 0 CJ C 0 N CD Gm 0 C0-G zo 11 c20 0 1 0 0 0 0- 0 CcD U o C UU inC 0 U Co 0 0 1 00-ri C-4 130 I0 Z5 rn 0ir1 i-rn 13 II rn models landing area selected radio step confidently edge hill give model firm toss slightly downward direction Yes downward need airspeed altitude point model may balloon upward suddenly prepared push elevator stick forward prevent stall lift model will soon back above hill dont have enough airspeed solid control will crash After few seconds build up speed turn airplane 900 flying parallel slope model will continue gain altitude flying above out front hill Before model becomes too small see make 1800 turn away hill pass front launch position other end circuit make another 180 turn again away hill Youre now flying basic Slope Soaring pattern Seen above its figure eight always turning wind turn wind keep airspeed up ground speed down turns avoid being blown back over hill Being blown back over hill just about worst thing can happen now because lift decreases rapidly turbulence increases sharply behind hill Ill tell about handle section landing Flying slope lift Once youve launched established flight pattern may want explore limits lift zone Generally lift strongest just above slightly out front hill tapers off go higher decreases go farther out Usable lift can range few feet three times height hill 200 feet out front Finding limit lift zone front hill difficult because tapers off gradually Just fly out until gently begin settle bring model back stronger lift stay aloft Flying behind hill hazardous take pains stay out front gain altitude turning smoothly flying strongest part lift strong lift can get up twice height hill two passes weaker lift may take passes gaining foot two time reach crnising altitude reduce altitude mainly intentionally flying areas weaker lift can also lose height raising nose slightly increasing wings angle attack presents flat surface airstream reducing lift speed maneuver similar landing flare precaution same Dont overdo youll stall What once youve got basics aerobatics course Almost anything can done fuel-powered model can done Slope Soarer have experience Tell Control Horn Go Wont Get Bent Out Shape 0 airplane enthusiast know has same problems control horns flex bend break-what else new Introducing Sullivan 555 toughest control horn ever made Craftecl7with tempered steel instead plastic nickelplated wear resistance Sullivan Control Horn 555 built exacting specifications eliminate flex flutter Better still comes complete ass-filled nylon bushing prevent metal-to-metal contact radio interference sized fit either devises Sullivans New Ball Joint System easy off-axis movement Sullivan 555 Finally control horn 1 PRODUCTS thats made right stu 11 P0 Box 5166 Baltimore MD 21224 Getting Better Ideas Off Ground long-wing thermal gliders will probably try loops first Pilots powered models may prefer rolls first departure straight-and-level Before performing either maneuver gain some altitude begin shallow dive build up speed Inverted passes cool flying whole figure-eight pattern inverted supercool Immelmann turns split-Ss Cuban-eights well within performance envelope fast aileron-and-elevator-controlled Slope ships Landing Remember model airplanes rarely get broken flying its contact ground causes casualties Since its hard fly airplane scanning ground find good spot makes sense select landing area before launch three basic landing locations bottom slope itself top What youll need flat spot few trees bushes fences better big flat soft no obstructions First choice beginners land bottom Its safest spot theres enough flat space although may easiest because model harder see distance Start landing flying out away hill leaving strong lift zone model will gradually lose height altitude decreases lift turbulence reduced youre ready land parallel hill turn wind April 1992 149 its Best New OPS 120 four cycle engine its New high lift cam engine proud precision produced long life dependable service Its high torque makes ideal large scale models OPS VS Parts Are Readily Available Part Cometuim ftO44 9c land model would other Landing slope face requires precise control saves walking bottom slope free brush other obstacles fly lowwell below hilltop area reduced lift model will slow down lose altitude fly close hill let model drift upward rising air As climbs loses airspeed airplane reaches point slightly above desired landing spot youre flying foot two ground put nose down grease er its flat enough big enough top hill offers good visibility familiar landing pattern fuel-power thermal glider pilots also offers hazardous condition Slope flyingthe dreaded rotor area minimal lift intense turbulence typical landing approach top gain plenty altitude fly downwind leg time turn downwind away slope face lose altitude crosswind leg make final approach wind trick maintain control flying through diminishing lift increasing turbulence pilot must keep airspeed up maintain control Im kidding about safety airspeed flying through turbulence Youll landing hot land top bill youll need quick fingers safely compensating advantage landing top dont like approach can go aroundsomething generally cant thermal glider landings can warm up flying high approaches instead landing shoot out over edge back slope lift Practice few passes coming down lower time until get hang make low pass actual landing Like lift zone front hill turbulent zone behind hill limited size rotor intensity tapers off move away edge have truly large flat area top hill can fly over rotor land behind typical thermal glider landing choice landing areas depends much personal preference experience topography Ive seen three types landings made three different pilots flying same hill same day Parting thought warning Youve got airplane selected siteand today have wind Add thing repair kit CyA cyanoacrylate glue five-minute epoxy fiberglass cloth Slope flying hard models field repairs can get back air Dont afraid take beat-up models slope theyre sure receive punishment Good looks dont count first year Slope Soaring lift cooking youll want flying instead watching Slope Soaring definitely participant sport definitely addictive Once try may never again satisfied ordinary RC flying References further reading 1 Dave Thornberg Old Buzzards Soaring Book Pony X Press 5 Monticello Drive Albuquerque NM 87123 Two chapters Slope Soaring great writing style 2 Dave Jones Radio Controlled Gliding Argus Books 1 Golden Square London England WiR 3AB Two excellent chapters Keith Thomas Slope Soaring 3 Dave Hughes Radio Controlled Slope Soaring Chart Hobby Distributors Littlehampton West Sussex UK Continued page 1S2 150 Model Aviation 4 0 e AERIAL MODEL AIRCRAFT PRODUCTS AMAP cutter bowl$17900 213 965-9504I AMAP power supply$4900 Anodized available Add$1000 Three-piece fuse T tailor V tail also sell cut cores available airfoils MH42 MH43 MH62 MH64 7003 RGI5 RGI4A Foam cores $5000 soaFull Money-Back 30$35Cfl antee 5 $45 FLAIR SLOPE 11/SPORT ELECTRIC eComplete S6000 Length43Wd h3Hegh 4O&W5ize1otorRjnded Shp-on Nose Cone Fuselage made EZ Lam Epo Density96 X 2 $2900 Aerospace composite PrixtictsBlue Foam 2 lb24 X Will cut shipping 12 X 48 please specify Bob Rntzlaff 1641 South Elismere Ave Los Angles CA 90019 ASW 17 1/4 Scale 4 M Basic Kit $28500 Thermal Phase Hand Launch 60 E 387 $5000 BflNAJER RIRCRRFT DESIGNS BRB KITS FLY BEST WS 52 1050 sqin Length 54 Weight 9511051b UltimatePRICE $295 KITS INCLUDE Epoxyglass fuse bellypan cowl cock pit lpants applicable Virgin bead foam wing cores wings 1 piece internal formers machine cut birch ACR t ply Illustrated construction manual Clear butyrate canopy Preformed T-6 aluminum landing gear Plug stab kit TO ORDER CALL 215-759-3179 5717 Sullivan Trail Nazareth PA 18064 VISA/MC ACCEPTED definitive work 17 chapters five appendices 4 Stan Eames Sal DeFrancesco Slope Soaring Inland Sites NSP 1991 Northeast Sailplane Products catalog Northeast Sailplane Products 16 Kirby Lane Williston VT 05495 Note British publications listed available US booksellers yes want write about Slope Soaring does help name Dave ng Fun/Mathews Continued page 47 SO WHAT R VA BUILUN Ever notice thats first thing two dedicated modelers ask other meet during winter months Sure intensely dedicated sorts wh fly feet snow temperature below 30 F0 us prefer spend modeling time warm shop cold winter days building things fly weather becomes hospitable also awfully good days spending some time repairing little things last flying seasons models temporary repair can fixed correctly worn-out components replaced radio equipment returned repair station annual servicing course batteries cycled month Im growing about half paranoid over hinges Last flying season seemed hinge year total wipe-out prototype aileron fell off managed land another model rudder hanging pushrod another instance did usual pre-flight pull test have elevator come loose fingers dont think its fair condemn particular brand hinges last seasons troubles Rather think blame lies lots use own poor technique point never preswne hinges tight check ON SAFETY CHECKS brings another thing mind As anyone has flown IMAA event knows group insists safety checks before allowing model fly would least presume fly big models would well above average construction maintenance skills Yet nearly fly-in Ive attended safety inspectors have discovered least model defects would have endangered model spectators other pilots well Some fliers seem offended safety checks seems rather vain Regardless well model built maintained well owner has pre flighted host things might miss Its redundancy thing see times something inspected less likelihood some little detail slipping Thats called quality control isnt Frankly can speculate safety inspections arent part fun fly scene Id sure hate hurt someone hurt someone result some little thing failing because Id grown accustomed looking no longer really saw Wouldnt JUMBO RUBBER POWER month coincidence have 1WLK WIAVLFOAMAIRE 10 SPAN 30-33 LBS 50-75 CC POWER 74 IN WING SPAN 6-7 LBS 45-60 POWER 10 SPAN ,o-42 CC POWER 5-10 LB PAYLOAD OPTIONAL SPREADER4 CH PLY FOAM AND BALSA WOOD CHOOSE 3 UM 4 1 SLOW AND STABLE KIT $26995 SPDKiT$1995 T $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOG T 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERS tpIanecompaaIv SA/MASTERCARD 152 Model Aviation EChu8hcket30Th4eIt 0 N S Y Issa 30AbI8hfl 90 TS CtIW04sI w 6,-~99o SET POSP&H 0,4sOT.WARNING AIRCRAFTIRADIO ID LABEL SETS Identify yaur aircraft per AMA safety rules Sef stc abe s am 0as81088818 $4ooar8n Send eke onee S3ndoIes 950aM $4850 0888810 t9SOPIus 08040 $090 toBaadus Ernepoeo P080 8 NOVa C NY 002 LATNES MILLS METALO BOOKS -PRECIOION TNSTAUMENTS COMPLETE CATALOG $2 00 Ts stems 000011 5beRad c 4I50aoyfald OH 4550$ COMPAC5528562 WS 66 883 sqin 90 108 2U 120 41 Length 60 Weight 95/1051b Also Avail able Extra 230 Version Extra 3XPRICE $240 WS 66 -883 sqin Length 59 90 108 2C 120 4C Weight 95/lOSIb Sukhoi SU-26MPRICE $240 Continued page 154
Edition: Model Aviation - 1992/04
Page Numbers: 16, 17, 18, 19, 148, 149, 150, 152
Jim Harrigan pilots Gentie Lady iight lift over picturesque New Engiand vaiiey SLOPE SOARING amazing seems like magic Sure scientific principles meteorology aerodynamics explain works throwing unpowered heavier-than-air model off hill running through aerobatic routine landing hour later does seem magical Slope Soaring offers lot RC fliers Its inexpensive buy no fuel generally fly simple airplanes simple radios Its exhilarating can fly howling wind other RC pilots grounded Its challenging have pay attention fly unpowered airplane 25mph wind once youve mastered basics can fly aerobatics try Combat pylon racing Some modelers hesitant throw model off rocky ledge dead-stick takeoff havent tried interested article explains survive slope lift works glider always descending relative its surrounding air mass can rise relative ground Left author flying Future Flight Kilngberg Wing moderate lift over abandoned highway overpass summer leaves trees upwind slope create enough turbulence make site unsuitable flying Right Bob Powers tests lift two-meter aileron-and-elevator-controlled Sailplane JIm Harrigan waits House Balsa two-channel glider 2x4 16 Model Aviation Lou Garwood about launch Sensoar teat lift amount available lilt gIven site varies wIth changing wind speed wind direction air mass rising faster glider falling condition exists thermals slope lift wind blows against slope airflow forced upward uphill flow creates source rising air supports birds sailplanes Gulls use slope lift fly miles along seacoast dunes single wingbeat Slope Soarers can same Wind enemy thermal glider pilot its friend Slope glider pilot starters youll need 8-mph faster wind blowing straight almost straight hillside Adequate lift depends wind speed slope shape also wind direction directly wind blows slope greater lift can fly slight crosswind maybe up 200 either way lift reduced skill required After initial right turn fiy parallel siope Lou makes 1800 left turn end circuit strongest lift found just above out front slope lighter model less lift needed sustain flight Its rare day theres too much wind because wind increases can fly smaller heavier faster models can stand up Bob Powers iaunches Coyote aileron-andelevator-controlled ship municipal land fill market 15 years Coyote quick smooth filer given sufficient lift can fly best way determine theres enough lift fly watch other Sailplanes second best way watch gulls hawks soaring over slope no other fliers human bird working slope test lift firmly holding model out lift front slope plane wants rise out hand April 1992 17 After final radio check Lou launches Sensoar straight-out lou air plane gains altitude immediately As glider continues climb Lou presses elevator stick forward down elevator prevent stall Spirit rudder-and-alieron-controlled two-meter Thermal contest Sailplane works weil slopes because its semisym metrical airfoil penetrates wind High Sierra two-meter rudder-andelevator-controlled ship clear canopy fiberglass fuselage Weighing models built-up wings pen etrates wind effectively jim Harrigan grabs isat flight day Gentle Lady very competent rudder-and-elevator-controlled ship quite suitabie first gilder N theres enough lift fly Aircraft selection Its important select model airplane suited wind conditions probably Slope Soaring power flying thermal gliding Light windsay 6 10 mphrequires light floater airplanes wing loadings about five eight ounces per square foot wing area category Culpepper Models Chuperosa Cox Silhouette Carl Goldberg Gentle Lady Hobby Horn Sensoar Bob Martin Bobcat Minimax Enterprise Minimax-700 Moderate wind 10 20 mph supports perhaps greatest variety airplanes both polyhedral alleron-controlled wing loadings six 12 ounces per square foot wind Ive great flights Dynaflite Freedom Future Flight Klingberg Wing Great Planes Spirit House Balsa 2x4 Bob Martin Coyote MFA High Sierra RC Products MC-3 Sig Ninja wind roaring 20 mph youll need specialized Slope Soaring ships tend smaller generally have wing loadings 10 ounces higher Examples DCU Dragonfly Douglas Aircraft Quicksilver Fly Night Shadow Bob Martin SR-7 models well moderate wind will fly high wind added weight Slope pilots learn bring lead sheet steel washers ballast Beginner Slope ships use simple radio system two servos controlling rudder elevator advanced models use two channels aileron elevator control Either control system fine basic flying ailerons needed aerobatics Flying wing models typically combine two controls set elevons servos wingeronlpitcheron models pivot 18 Model Aviation Lou Garwood Sig Ninja Lou learned rolls 50-in aileron-andelevator-controlled Sailplane Chuperosa 60-in light-air Slope ship designed hand-launched thermal compe tion can built either rudder-andelevator aileron-and-elevator controls Freedom all-balsa Slope Soarer has aileron elevator control plus speed brakes operated third servo yuu u ruuuy ior someining tarn ana aiieron-and-elevator-controlied Quicksilver Both Bob Powers acro batic Douglas Aircraft ship can fly inverted nearly well fly upright Bob puts Quicksilver through acro batic routine slope lift over Cape Cod bay Photo David Garwood Left typical Slope Soarer fashion Bob Martin Coyow iou elevator servo mounted fuselage aileron servo tne wing Right Peck-Polymers Genesis flying wing uses mechanical V-tail mixer move devon combined elevator aileron control surfaces Left plan-built Chandeil uses mechanical mixer front wing combines rudder elevator servo output control V-tail Another servo located above wing pivot wing roil control Ailerons used Right theory behind use pivoting wingeron instead ailerons roil control moving large surface just little creates less drag moving small surface lot Bob Martin RC Coyote soars slope lift over roiling Hudson River valley hills up state New York Photo Dave Garwood 7 Sig Ninja soars high over Atlantic Cape Cod National Seashore reservation Lou Garwood stays control shore Photo Dave Garwood Sensoar riding slope lift Hudson River Valley Photo Paula Garwood Lou Garwood launches Sensoar 18-foot hill some inland Slope Soaring Photo David Garwood wings together provide pitch control pivot opposite directions roll Continued page 148 Another photo Lou putting up Sen soar Hobby Horn fioater designed light winds Photo David Garwood April 1992 19 Another photo author flying Kling berg Wing inland lift off abandoned highway overpass Photo Rudy Coletti UU0j U 0 OQ 0- 0 0 0 0 - 0 i 0 P -o- g 0 0 0 l 00 U~ 2 _ 0 -2 0 0 0 0 - 0 a bCD 3 0 - 0 oo ~ o 00 0S0UU 0~U o U0 ~0p 0 0 0 0 0 - o0~ 0 00 U S) .tU0-t 00 0 -t0 0 000i 0 0~ 0 00 o 0 2 -i 0 2 - 0 0 Oo U -0 00 P 00 U ~U00- U 0 oea 0 00 0 00 0 C C p4 0 -4 n SI 0 -5 0 N -4 b b C, C 0 C C C3 C C 000 W xxx 0 C M 0 0CO 0 04400-4-4-4-4 0NC30N~400O0 b C -4 x Mxxx xxx xx x M 0 Mx 0-x Mx 0x x 0 M M . CO MMMMMM 0CCC4W xxCaCxaaaxxxNNNCCC xxxxxxxx -40 C000000-4NNCCC3CCM 0-4-4N00NM0 3-4-4N3 0NNC7CN 0 0C000N0MC0-0 0CCCC~CC4CCC4CC xxxxx00xxx ~xxxxxxxxx0)xx000xxx xxxxx MMM-4-4-4CC4C4-4C-4 0 4-N -4N0-4 00 0 OON0CN0CCO ~N-4-4N N000000N0bCN0NCN~M4 CCMCMb 0M0C0-401 N 4 CCCC N MOO 4 0 N N CoN-4 -4 C -4 -40 x x -4 cc 0 mm 0 000a S 0 C C 0 -4-4-4-40 00000 C N -40 C C40N x0xx 2 NN0 4. C MM C M 4C-4-4 04-4C-CC0NN-4 CM0-C 000-4CCCCC C C C C C C C C C C C MM MM N50Np W xxxxxxxx00000 0 ~4xxxxx 0 C MM0 0 NN&MM~ 0 MM 00 N 00 N 004. C C 0 0000000MO00ON u 0 P0 o W C o 00- 0 x 00 0 C r M -5 CC0 C/ r 00 0o C [ ~IIII 0000000000 000000000 W 000 NNN ~M0 0 -4-4-4 0N 0000 CCMMM--4-- 0CC3MN-4 xxxxxxxxOxxxx- 0 M 0 w 0 0 0 w 5 0 0004.M 0M 0 C 4 0C0OM N N N N N 0CC x x M-4 N N C - 0-4 0 000 C0 4000000 O00N0C-0 00 CO 0 4 0 C 0 0 x0xMx0x C xxx. 0M-M-4M-4M CDxMxMxMx CO0x0xMxM 50 0 N00~ N0CMN0CNN400C4N 0 0 ONOCCCCMMO -4M0CM000M0C0C t0C0 C M 00 MC -4 00 0 0 C C MM MM MM MM 1 C C 0 C~CM 0-4-4CCCC x x 000x x x x 0x x x xxxx 4CC44 0 0 C- C, 4 0 C 0 U w C -n H ni 0 C 0 rn -I m 0 w 0 x C C 0 w 0 m z C N 0 N C 0 C N 0 CJ C 0 N CD Gm 0 C0-G zo 11 c20 0 1 0 0 0 0- 0 CcD U o C UU inC 0 U Co 0 0 1 00-ri C-4 130 I0 Z5 rn 0ir1 i-rn 13 II rn models landing area selected radio step confidently edge hill give model firm toss slightly downward direction Yes downward need airspeed altitude point model may balloon upward suddenly prepared push elevator stick forward prevent stall lift model will soon back above hill dont have enough airspeed solid control will crash After few seconds build up speed turn airplane 900 flying parallel slope model will continue gain altitude flying above out front hill Before model becomes too small see make 1800 turn away hill pass front launch position other end circuit make another 180 turn again away hill Youre now flying basic Slope Soaring pattern Seen above its figure eight always turning wind turn wind keep airspeed up ground speed down turns avoid being blown back over hill Being blown back over hill just about worst thing can happen now because lift decreases rapidly turbulence increases sharply behind hill Ill tell about handle section landing Flying slope lift Once youve launched established flight pattern may want explore limits lift zone Generally lift strongest just above slightly out front hill tapers off go higher decreases go farther out Usable lift can range few feet three times height hill 200 feet out front Finding limit lift zone front hill difficult because tapers off gradually Just fly out until gently begin settle bring model back stronger lift stay aloft Flying behind hill hazardous take pains stay out front gain altitude turning smoothly flying strongest part lift strong lift can get up twice height hill two passes weaker lift may take passes gaining foot two time reach crnising altitude reduce altitude mainly intentionally flying areas weaker lift can also lose height raising nose slightly increasing wings angle attack presents flat surface airstream reducing lift speed maneuver similar landing flare precaution same Dont overdo youll stall What once youve got basics aerobatics course Almost anything can done fuel-powered model can done Slope Soarer have experience Tell Control Horn Go Wont Get Bent Out Shape 0 airplane enthusiast know has same problems control horns flex bend break-what else new Introducing Sullivan 555 toughest control horn ever made Craftecl7with tempered steel instead plastic nickelplated wear resistance Sullivan Control Horn 555 built exacting specifications eliminate flex flutter Better still comes complete ass-filled nylon bushing prevent metal-to-metal contact radio interference sized fit either devises Sullivans New Ball Joint System easy off-axis movement Sullivan 555 Finally control horn 1 PRODUCTS thats made right stu 11 P0 Box 5166 Baltimore MD 21224 Getting Better Ideas Off Ground long-wing thermal gliders will probably try loops first Pilots powered models may prefer rolls first departure straight-and-level Before performing either maneuver gain some altitude begin shallow dive build up speed Inverted passes cool flying whole figure-eight pattern inverted supercool Immelmann turns split-Ss Cuban-eights well within performance envelope fast aileron-and-elevator-controlled Slope ships Landing Remember model airplanes rarely get broken flying its contact ground causes casualties Since its hard fly airplane scanning ground find good spot makes sense select landing area before launch three basic landing locations bottom slope itself top What youll need flat spot few trees bushes fences better big flat soft no obstructions First choice beginners land bottom Its safest spot theres enough flat space although may easiest because model harder see distance Start landing flying out away hill leaving strong lift zone model will gradually lose height altitude decreases lift turbulence reduced youre ready land parallel hill turn wind April 1992 149 its Best New OPS 120 four cycle engine its New high lift cam engine proud precision produced long life dependable service Its high torque makes ideal large scale models OPS VS Parts Are Readily Available Part Cometuim ftO44 9c land model would other Landing slope face requires precise control saves walking bottom slope free brush other obstacles fly lowwell below hilltop area reduced lift model will slow down lose altitude fly close hill let model drift upward rising air As climbs loses airspeed airplane reaches point slightly above desired landing spot youre flying foot two ground put nose down grease er its flat enough big enough top hill offers good visibility familiar landing pattern fuel-power thermal glider pilots also offers hazardous condition Slope flyingthe dreaded rotor area minimal lift intense turbulence typical landing approach top gain plenty altitude fly downwind leg time turn downwind away slope face lose altitude crosswind leg make final approach wind trick maintain control flying through diminishing lift increasing turbulence pilot must keep airspeed up maintain control Im kidding about safety airspeed flying through turbulence Youll landing hot land top bill youll need quick fingers safely compensating advantage landing top dont like approach can go aroundsomething generally cant thermal glider landings can warm up flying high approaches instead landing shoot out over edge back slope lift Practice few passes coming down lower time until get hang make low pass actual landing Like lift zone front hill turbulent zone behind hill limited size rotor intensity tapers off move away edge have truly large flat area top hill can fly over rotor land behind typical thermal glider landing choice landing areas depends much personal preference experience topography Ive seen three types landings made three different pilots flying same hill same day Parting thought warning Youve got airplane selected siteand today have wind Add thing repair kit CyA cyanoacrylate glue five-minute epoxy fiberglass cloth Slope flying hard models field repairs can get back air Dont afraid take beat-up models slope theyre sure receive punishment Good looks dont count first year Slope Soaring lift cooking youll want flying instead watching Slope Soaring definitely participant sport definitely addictive Once try may never again satisfied ordinary RC flying References further reading 1 Dave Thornberg Old Buzzards Soaring Book Pony X Press 5 Monticello Drive Albuquerque NM 87123 Two chapters Slope Soaring great writing style 2 Dave Jones Radio Controlled Gliding Argus Books 1 Golden Square London England WiR 3AB Two excellent chapters Keith Thomas Slope Soaring 3 Dave Hughes Radio Controlled Slope Soaring Chart Hobby Distributors Littlehampton West Sussex UK Continued page 1S2 150 Model Aviation 4 0 e AERIAL MODEL AIRCRAFT PRODUCTS AMAP cutter bowl$17900 213 965-9504I AMAP power supply$4900 Anodized available Add$1000 Three-piece fuse T tailor V tail also sell cut cores available airfoils MH42 MH43 MH62 MH64 7003 RGI5 RGI4A Foam cores $5000 soaFull Money-Back 30$35Cfl antee 5 $45 FLAIR SLOPE 11/SPORT ELECTRIC eComplete S6000 Length43Wd h3Hegh 4O&W5ize1otorRjnded Shp-on Nose Cone Fuselage made EZ Lam Epo Density96 X 2 $2900 Aerospace composite PrixtictsBlue Foam 2 lb24 X Will cut shipping 12 X 48 please specify Bob Rntzlaff 1641 South Elismere Ave Los Angles CA 90019 ASW 17 1/4 Scale 4 M Basic Kit $28500 Thermal Phase Hand Launch 60 E 387 $5000 BflNAJER RIRCRRFT DESIGNS BRB KITS FLY BEST WS 52 1050 sqin Length 54 Weight 9511051b UltimatePRICE $295 KITS INCLUDE Epoxyglass fuse bellypan cowl cock pit lpants applicable Virgin bead foam wing cores wings 1 piece internal formers machine cut birch ACR t ply Illustrated construction manual Clear butyrate canopy Preformed T-6 aluminum landing gear Plug stab kit TO ORDER CALL 215-759-3179 5717 Sullivan Trail Nazareth PA 18064 VISA/MC ACCEPTED definitive work 17 chapters five appendices 4 Stan Eames Sal DeFrancesco Slope Soaring Inland Sites NSP 1991 Northeast Sailplane Products catalog Northeast Sailplane Products 16 Kirby Lane Williston VT 05495 Note British publications listed available US booksellers yes want write about Slope Soaring does help name Dave ng Fun/Mathews Continued page 47 SO WHAT R VA BUILUN Ever notice thats first thing two dedicated modelers ask other meet during winter months Sure intensely dedicated sorts wh fly feet snow temperature below 30 F0 us prefer spend modeling time warm shop cold winter days building things fly weather becomes hospitable also awfully good days spending some time repairing little things last flying seasons models temporary repair can fixed correctly worn-out components replaced radio equipment returned repair station annual servicing course batteries cycled month Im growing about half paranoid over hinges Last flying season seemed hinge year total wipe-out prototype aileron fell off managed land another model rudder hanging pushrod another instance did usual pre-flight pull test have elevator come loose fingers dont think its fair condemn particular brand hinges last seasons troubles Rather think blame lies lots use own poor technique point never preswne hinges tight check ON SAFETY CHECKS brings another thing mind As anyone has flown IMAA event knows group insists safety checks before allowing model fly would least presume fly big models would well above average construction maintenance skills Yet nearly fly-in Ive attended safety inspectors have discovered least model defects would have endangered model spectators other pilots well Some fliers seem offended safety checks seems rather vain Regardless well model built maintained well owner has pre flighted host things might miss Its redundancy thing see times something inspected less likelihood some little detail slipping Thats called quality control isnt Frankly can speculate safety inspections arent part fun fly scene Id sure hate hurt someone hurt someone result some little thing failing because Id grown accustomed looking no longer really saw Wouldnt JUMBO RUBBER POWER month coincidence have 1WLK WIAVLFOAMAIRE 10 SPAN 30-33 LBS 50-75 CC POWER 74 IN WING SPAN 6-7 LBS 45-60 POWER 10 SPAN ,o-42 CC POWER 5-10 LB PAYLOAD OPTIONAL SPREADER4 CH PLY FOAM AND BALSA WOOD CHOOSE 3 UM 4 1 SLOW AND STABLE KIT $26995 SPDKiT$1995 T $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOG T 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERS tpIanecompaaIv SA/MASTERCARD 152 Model Aviation EChu8hcket30Th4eIt 0 N S Y Issa 30AbI8hfl 90 TS CtIW04sI w 6,-~99o SET POSP&H 0,4sOT.WARNING AIRCRAFTIRADIO ID LABEL SETS Identify yaur aircraft per AMA safety rules Sef stc abe s am 0as81088818 $4ooar8n Send eke onee S3ndoIes 950aM $4850 0888810 t9SOPIus 08040 $090 toBaadus Ernepoeo P080 8 NOVa C NY 002 LATNES MILLS METALO BOOKS -PRECIOION TNSTAUMENTS COMPLETE CATALOG $2 00 Ts stems 000011 5beRad c 4I50aoyfald OH 4550$ COMPAC5528562 WS 66 883 sqin 90 108 2U 120 41 Length 60 Weight 95/1051b Also Avail able Extra 230 Version Extra 3XPRICE $240 WS 66 -883 sqin Length 59 90 108 2C 120 4C Weight 95/lOSIb Sukhoi SU-26MPRICE $240 Continued page 154
Edition: Model Aviation - 1992/04
Page Numbers: 16, 17, 18, 19, 148, 149, 150, 152
Jim Harrigan pilots Gentie Lady iight lift over picturesque New Engiand vaiiey SLOPE SOARING amazing seems like magic Sure scientific principles meteorology aerodynamics explain works throwing unpowered heavier-than-air model off hill running through aerobatic routine landing hour later does seem magical Slope Soaring offers lot RC fliers Its inexpensive buy no fuel generally fly simple airplanes simple radios Its exhilarating can fly howling wind other RC pilots grounded Its challenging have pay attention fly unpowered airplane 25mph wind once youve mastered basics can fly aerobatics try Combat pylon racing Some modelers hesitant throw model off rocky ledge dead-stick takeoff havent tried interested article explains survive slope lift works glider always descending relative its surrounding air mass can rise relative ground Left author flying Future Flight Kilngberg Wing moderate lift over abandoned highway overpass summer leaves trees upwind slope create enough turbulence make site unsuitable flying Right Bob Powers tests lift two-meter aileron-and-elevator-controlled Sailplane JIm Harrigan waits House Balsa two-channel glider 2x4 16 Model Aviation Lou Garwood about launch Sensoar teat lift amount available lilt gIven site varies wIth changing wind speed wind direction air mass rising faster glider falling condition exists thermals slope lift wind blows against slope airflow forced upward uphill flow creates source rising air supports birds sailplanes Gulls use slope lift fly miles along seacoast dunes single wingbeat Slope Soarers can same Wind enemy thermal glider pilot its friend Slope glider pilot starters youll need 8-mph faster wind blowing straight almost straight hillside Adequate lift depends wind speed slope shape also wind direction directly wind blows slope greater lift can fly slight crosswind maybe up 200 either way lift reduced skill required After initial right turn fiy parallel siope Lou makes 1800 left turn end circuit strongest lift found just above out front slope lighter model less lift needed sustain flight Its rare day theres too much wind because wind increases can fly smaller heavier faster models can stand up Bob Powers iaunches Coyote aileron-andelevator-controlled ship municipal land fill market 15 years Coyote quick smooth filer given sufficient lift can fly best way determine theres enough lift fly watch other Sailplanes second best way watch gulls hawks soaring over slope no other fliers human bird working slope test lift firmly holding model out lift front slope plane wants rise out hand April 1992 17 After final radio check Lou launches Sensoar straight-out lou air plane gains altitude immediately As glider continues climb Lou presses elevator stick forward down elevator prevent stall Spirit rudder-and-alieron-controlled two-meter Thermal contest Sailplane works weil slopes because its semisym metrical airfoil penetrates wind High Sierra two-meter rudder-andelevator-controlled ship clear canopy fiberglass fuselage Weighing models built-up wings pen etrates wind effectively jim Harrigan grabs isat flight day Gentle Lady very competent rudder-and-elevator-controlled ship quite suitabie first gilder N theres enough lift fly Aircraft selection Its important select model airplane suited wind conditions probably Slope Soaring power flying thermal gliding Light windsay 6 10 mphrequires light floater airplanes wing loadings about five eight ounces per square foot wing area category Culpepper Models Chuperosa Cox Silhouette Carl Goldberg Gentle Lady Hobby Horn Sensoar Bob Martin Bobcat Minimax Enterprise Minimax-700 Moderate wind 10 20 mph supports perhaps greatest variety airplanes both polyhedral alleron-controlled wing loadings six 12 ounces per square foot wind Ive great flights Dynaflite Freedom Future Flight Klingberg Wing Great Planes Spirit House Balsa 2x4 Bob Martin Coyote MFA High Sierra RC Products MC-3 Sig Ninja wind roaring 20 mph youll need specialized Slope Soaring ships tend smaller generally have wing loadings 10 ounces higher Examples DCU Dragonfly Douglas Aircraft Quicksilver Fly Night Shadow Bob Martin SR-7 models well moderate wind will fly high wind added weight Slope pilots learn bring lead sheet steel washers ballast Beginner Slope ships use simple radio system two servos controlling rudder elevator advanced models use two channels aileron elevator control Either control system fine basic flying ailerons needed aerobatics Flying wing models typically combine two controls set elevons servos wingeronlpitcheron models pivot 18 Model Aviation Lou Garwood Sig Ninja Lou learned rolls 50-in aileron-andelevator-controlled Sailplane Chuperosa 60-in light-air Slope ship designed hand-launched thermal compe tion can built either rudder-andelevator aileron-and-elevator controls Freedom all-balsa Slope Soarer has aileron elevator control plus speed brakes operated third servo yuu u ruuuy ior someining tarn ana aiieron-and-elevator-controlied Quicksilver Both Bob Powers acro batic Douglas Aircraft ship can fly inverted nearly well fly upright Bob puts Quicksilver through acro batic routine slope lift over Cape Cod bay Photo David Garwood Left typical Slope Soarer fashion Bob Martin Coyow iou elevator servo mounted fuselage aileron servo tne wing Right Peck-Polymers Genesis flying wing uses mechanical V-tail mixer move devon combined elevator aileron control surfaces Left plan-built Chandeil uses mechanical mixer front wing combines rudder elevator servo output control V-tail Another servo located above wing pivot wing roil control Ailerons used Right theory behind use pivoting wingeron instead ailerons roil control moving large surface just little creates less drag moving small surface lot Bob Martin RC Coyote soars slope lift over roiling Hudson River valley hills up state New York Photo Dave Garwood 7 Sig Ninja soars high over Atlantic Cape Cod National Seashore reservation Lou Garwood stays control shore Photo Dave Garwood Sensoar riding slope lift Hudson River Valley Photo Paula Garwood Lou Garwood launches Sensoar 18-foot hill some inland Slope Soaring Photo David Garwood wings together provide pitch control pivot opposite directions roll Continued page 148 Another photo Lou putting up Sen soar Hobby Horn fioater designed light winds Photo David Garwood April 1992 19 Another photo author flying Kling berg Wing inland lift off abandoned highway overpass Photo Rudy Coletti UU0j U 0 OQ 0- 0 0 0 0 - 0 i 0 P -o- g 0 0 0 l 00 U~ 2 _ 0 -2 0 0 0 0 - 0 a bCD 3 0 - 0 oo ~ o 00 0S0UU 0~U o U0 ~0p 0 0 0 0 0 - o0~ 0 00 U S) .tU0-t 00 0 -t0 0 000i 0 0~ 0 00 o 0 2 -i 0 2 - 0 0 Oo U -0 00 P 00 U ~U00- U 0 oea 0 00 0 00 0 C C p4 0 -4 n SI 0 -5 0 N -4 b b C, C 0 C C C3 C C 000 W xxx 0 C M 0 0CO 0 04400-4-4-4-4 0NC30N~400O0 b C -4 x Mxxx xxx xx x M 0 Mx 0-x Mx 0x x 0 M M . CO MMMMMM 0CCC4W xxCaCxaaaxxxNNNCCC xxxxxxxx -40 C000000-4NNCCC3CCM 0-4-4N00NM0 3-4-4N3 0NNC7CN 0 0C000N0MC0-0 0CCCC~CC4CCC4CC xxxxx00xxx ~xxxxxxxxx0)xx000xxx xxxxx MMM-4-4-4CC4C4-4C-4 0 4-N -4N0-4 00 0 OON0CN0CCO ~N-4-4N N000000N0bCN0NCN~M4 CCMCMb 0M0C0-401 N 4 CCCC N MOO 4 0 N N CoN-4 -4 C -4 -40 x x -4 cc 0 mm 0 000a S 0 C C 0 -4-4-4-40 00000 C N -40 C C40N x0xx 2 NN0 4. C MM C M 4C-4-4 04-4C-CC0NN-4 CM0-C 000-4CCCCC C C C C C C C C C C C MM MM N50Np W xxxxxxxx00000 0 ~4xxxxx 0 C MM0 0 NN&MM~ 0 MM 00 N 00 N 004. C C 0 0000000MO00ON u 0 P0 o W C o 00- 0 x 00 0 C r M -5 CC0 C/ r 00 0o C [ ~IIII 0000000000 000000000 W 000 NNN ~M0 0 -4-4-4 0N 0000 CCMMM--4-- 0CC3MN-4 xxxxxxxxOxxxx- 0 M 0 w 0 0 0 w 5 0 0004.M 0M 0 C 4 0C0OM N N N N N 0CC x x M-4 N N C - 0-4 0 000 C0 4000000 O00N0C-0 00 CO 0 4 0 C 0 0 x0xMx0x C xxx. 0M-M-4M-4M CDxMxMxMx CO0x0xMxM 50 0 N00~ N0CMN0CNN400C4N 0 0 ONOCCCCMMO -4M0CM000M0C0C t0C0 C M 00 MC -4 00 0 0 C C MM MM MM MM 1 C C 0 C~CM 0-4-4CCCC x x 000x x x x 0x x x xxxx 4CC44 0 0 C- C, 4 0 C 0 U w C -n H ni 0 C 0 rn -I m 0 w 0 x C C 0 w 0 m z C N 0 N C 0 C N 0 CJ C 0 N CD Gm 0 C0-G zo 11 c20 0 1 0 0 0 0- 0 CcD U o C UU inC 0 U Co 0 0 1 00-ri C-4 130 I0 Z5 rn 0ir1 i-rn 13 II rn models landing area selected radio step confidently edge hill give model firm toss slightly downward direction Yes downward need airspeed altitude point model may balloon upward suddenly prepared push elevator stick forward prevent stall lift model will soon back above hill dont have enough airspeed solid control will crash After few seconds build up speed turn airplane 900 flying parallel slope model will continue gain altitude flying above out front hill Before model becomes too small see make 1800 turn away hill pass front launch position other end circuit make another 180 turn again away hill Youre now flying basic Slope Soaring pattern Seen above its figure eight always turning wind turn wind keep airspeed up ground speed down turns avoid being blown back over hill Being blown back over hill just about worst thing can happen now because lift decreases rapidly turbulence increases sharply behind hill Ill tell about handle section landing Flying slope lift Once youve launched established flight pattern may want explore limits lift zone Generally lift strongest just above slightly out front hill tapers off go higher decreases go farther out Usable lift can range few feet three times height hill 200 feet out front Finding limit lift zone front hill difficult because tapers off gradually Just fly out until gently begin settle bring model back stronger lift stay aloft Flying behind hill hazardous take pains stay out front gain altitude turning smoothly flying strongest part lift strong lift can get up twice height hill two passes weaker lift may take passes gaining foot two time reach crnising altitude reduce altitude mainly intentionally flying areas weaker lift can also lose height raising nose slightly increasing wings angle attack presents flat surface airstream reducing lift speed maneuver similar landing flare precaution same Dont overdo youll stall What once youve got basics aerobatics course Almost anything can done fuel-powered model can done Slope Soarer have experience Tell Control Horn Go Wont Get Bent Out Shape 0 airplane enthusiast know has same problems control horns flex bend break-what else new Introducing Sullivan 555 toughest control horn ever made Craftecl7with tempered steel instead plastic nickelplated wear resistance Sullivan Control Horn 555 built exacting specifications eliminate flex flutter Better still comes complete ass-filled nylon bushing prevent metal-to-metal contact radio interference sized fit either devises Sullivans New Ball Joint System easy off-axis movement Sullivan 555 Finally control horn 1 PRODUCTS thats made right stu 11 P0 Box 5166 Baltimore MD 21224 Getting Better Ideas Off Ground long-wing thermal gliders will probably try loops first Pilots powered models may prefer rolls first departure straight-and-level Before performing either maneuver gain some altitude begin shallow dive build up speed Inverted passes cool flying whole figure-eight pattern inverted supercool Immelmann turns split-Ss Cuban-eights well within performance envelope fast aileron-and-elevator-controlled Slope ships Landing Remember model airplanes rarely get broken flying its contact ground causes casualties Since its hard fly airplane scanning ground find good spot makes sense select landing area before launch three basic landing locations bottom slope itself top What youll need flat spot few trees bushes fences better big flat soft no obstructions First choice beginners land bottom Its safest spot theres enough flat space although may easiest because model harder see distance Start landing flying out away hill leaving strong lift zone model will gradually lose height altitude decreases lift turbulence reduced youre ready land parallel hill turn wind April 1992 149 its Best New OPS 120 four cycle engine its New high lift cam engine proud precision produced long life dependable service Its high torque makes ideal large scale models OPS VS Parts Are Readily Available Part Cometuim ftO44 9c land model would other Landing slope face requires precise control saves walking bottom slope free brush other obstacles fly lowwell below hilltop area reduced lift model will slow down lose altitude fly close hill let model drift upward rising air As climbs loses airspeed airplane reaches point slightly above desired landing spot youre flying foot two ground put nose down grease er its flat enough big enough top hill offers good visibility familiar landing pattern fuel-power thermal glider pilots also offers hazardous condition Slope flyingthe dreaded rotor area minimal lift intense turbulence typical landing approach top gain plenty altitude fly downwind leg time turn downwind away slope face lose altitude crosswind leg make final approach wind trick maintain control flying through diminishing lift increasing turbulence pilot must keep airspeed up maintain control Im kidding about safety airspeed flying through turbulence Youll landing hot land top bill youll need quick fingers safely compensating advantage landing top dont like approach can go aroundsomething generally cant thermal glider landings can warm up flying high approaches instead landing shoot out over edge back slope lift Practice few passes coming down lower time until get hang make low pass actual landing Like lift zone front hill turbulent zone behind hill limited size rotor intensity tapers off move away edge have truly large flat area top hill can fly over rotor land behind typical thermal glider landing choice landing areas depends much personal preference experience topography Ive seen three types landings made three different pilots flying same hill same day Parting thought warning Youve got airplane selected siteand today have wind Add thing repair kit CyA cyanoacrylate glue five-minute epoxy fiberglass cloth Slope flying hard models field repairs can get back air Dont afraid take beat-up models slope theyre sure receive punishment Good looks dont count first year Slope Soaring lift cooking youll want flying instead watching Slope Soaring definitely participant sport definitely addictive Once try may never again satisfied ordinary RC flying References further reading 1 Dave Thornberg Old Buzzards Soaring Book Pony X Press 5 Monticello Drive Albuquerque NM 87123 Two chapters Slope Soaring great writing style 2 Dave Jones Radio Controlled Gliding Argus Books 1 Golden Square London England WiR 3AB Two excellent chapters Keith Thomas Slope Soaring 3 Dave Hughes Radio Controlled Slope Soaring Chart Hobby Distributors Littlehampton West Sussex UK Continued page 1S2 150 Model Aviation 4 0 e AERIAL MODEL AIRCRAFT PRODUCTS AMAP cutter bowl$17900 213 965-9504I AMAP power supply$4900 Anodized available Add$1000 Three-piece fuse T tailor V tail also sell cut cores available airfoils MH42 MH43 MH62 MH64 7003 RGI5 RGI4A Foam cores $5000 soaFull Money-Back 30$35Cfl antee 5 $45 FLAIR SLOPE 11/SPORT ELECTRIC eComplete S6000 Length43Wd h3Hegh 4O&W5ize1otorRjnded Shp-on Nose Cone Fuselage made EZ Lam Epo Density96 X 2 $2900 Aerospace composite PrixtictsBlue Foam 2 lb24 X Will cut shipping 12 X 48 please specify Bob Rntzlaff 1641 South Elismere Ave Los Angles CA 90019 ASW 17 1/4 Scale 4 M Basic Kit $28500 Thermal Phase Hand Launch 60 E 387 $5000 BflNAJER RIRCRRFT DESIGNS BRB KITS FLY BEST WS 52 1050 sqin Length 54 Weight 9511051b UltimatePRICE $295 KITS INCLUDE Epoxyglass fuse bellypan cowl cock pit lpants applicable Virgin bead foam wing cores wings 1 piece internal formers machine cut birch ACR t ply Illustrated construction manual Clear butyrate canopy Preformed T-6 aluminum landing gear Plug stab kit TO ORDER CALL 215-759-3179 5717 Sullivan Trail Nazareth PA 18064 VISA/MC ACCEPTED definitive work 17 chapters five appendices 4 Stan Eames Sal DeFrancesco Slope Soaring Inland Sites NSP 1991 Northeast Sailplane Products catalog Northeast Sailplane Products 16 Kirby Lane Williston VT 05495 Note British publications listed available US booksellers yes want write about Slope Soaring does help name Dave ng Fun/Mathews Continued page 47 SO WHAT R VA BUILUN Ever notice thats first thing two dedicated modelers ask other meet during winter months Sure intensely dedicated sorts wh fly feet snow temperature below 30 F0 us prefer spend modeling time warm shop cold winter days building things fly weather becomes hospitable also awfully good days spending some time repairing little things last flying seasons models temporary repair can fixed correctly worn-out components replaced radio equipment returned repair station annual servicing course batteries cycled month Im growing about half paranoid over hinges Last flying season seemed hinge year total wipe-out prototype aileron fell off managed land another model rudder hanging pushrod another instance did usual pre-flight pull test have elevator come loose fingers dont think its fair condemn particular brand hinges last seasons troubles Rather think blame lies lots use own poor technique point never preswne hinges tight check ON SAFETY CHECKS brings another thing mind As anyone has flown IMAA event knows group insists safety checks before allowing model fly would least presume fly big models would well above average construction maintenance skills Yet nearly fly-in Ive attended safety inspectors have discovered least model defects would have endangered model spectators other pilots well Some fliers seem offended safety checks seems rather vain Regardless well model built maintained well owner has pre flighted host things might miss Its redundancy thing see times something inspected less likelihood some little detail slipping Thats called quality control isnt Frankly can speculate safety inspections arent part fun fly scene Id sure hate hurt someone hurt someone result some little thing failing because Id grown accustomed looking no longer really saw Wouldnt JUMBO RUBBER POWER month coincidence have 1WLK WIAVLFOAMAIRE 10 SPAN 30-33 LBS 50-75 CC POWER 74 IN WING SPAN 6-7 LBS 45-60 POWER 10 SPAN ,o-42 CC POWER 5-10 LB PAYLOAD OPTIONAL SPREADER4 CH PLY FOAM AND BALSA WOOD CHOOSE 3 UM 4 1 SLOW AND STABLE KIT $26995 SPDKiT$1995 T $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOG T 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERS tpIanecompaaIv SA/MASTERCARD 152 Model Aviation EChu8hcket30Th4eIt 0 N S Y Issa 30AbI8hfl 90 TS CtIW04sI w 6,-~99o SET POSP&H 0,4sOT.WARNING AIRCRAFTIRADIO ID LABEL SETS Identify yaur aircraft per AMA safety rules Sef stc abe s am 0as81088818 $4ooar8n Send eke onee S3ndoIes 950aM $4850 0888810 t9SOPIus 08040 $090 toBaadus Ernepoeo P080 8 NOVa C NY 002 LATNES MILLS METALO BOOKS -PRECIOION TNSTAUMENTS COMPLETE CATALOG $2 00 Ts stems 000011 5beRad c 4I50aoyfald OH 4550$ COMPAC5528562 WS 66 883 sqin 90 108 2U 120 41 Length 60 Weight 95/1051b Also Avail able Extra 230 Version Extra 3XPRICE $240 WS 66 -883 sqin Length 59 90 108 2C 120 4C Weight 95/lOSIb Sukhoi SU-26MPRICE $240 Continued page 154
Edition: Model Aviation - 1992/04
Page Numbers: 16, 17, 18, 19, 148, 149, 150, 152
Jim Harrigan pilots Gentie Lady iight lift over picturesque New Engiand vaiiey SLOPE SOARING amazing seems like magic Sure scientific principles meteorology aerodynamics explain works throwing unpowered heavier-than-air model off hill running through aerobatic routine landing hour later does seem magical Slope Soaring offers lot RC fliers Its inexpensive buy no fuel generally fly simple airplanes simple radios Its exhilarating can fly howling wind other RC pilots grounded Its challenging have pay attention fly unpowered airplane 25mph wind once youve mastered basics can fly aerobatics try Combat pylon racing Some modelers hesitant throw model off rocky ledge dead-stick takeoff havent tried interested article explains survive slope lift works glider always descending relative its surrounding air mass can rise relative ground Left author flying Future Flight Kilngberg Wing moderate lift over abandoned highway overpass summer leaves trees upwind slope create enough turbulence make site unsuitable flying Right Bob Powers tests lift two-meter aileron-and-elevator-controlled Sailplane JIm Harrigan waits House Balsa two-channel glider 2x4 16 Model Aviation Lou Garwood about launch Sensoar teat lift amount available lilt gIven site varies wIth changing wind speed wind direction air mass rising faster glider falling condition exists thermals slope lift wind blows against slope airflow forced upward uphill flow creates source rising air supports birds sailplanes Gulls use slope lift fly miles along seacoast dunes single wingbeat Slope Soarers can same Wind enemy thermal glider pilot its friend Slope glider pilot starters youll need 8-mph faster wind blowing straight almost straight hillside Adequate lift depends wind speed slope shape also wind direction directly wind blows slope greater lift can fly slight crosswind maybe up 200 either way lift reduced skill required After initial right turn fiy parallel siope Lou makes 1800 left turn end circuit strongest lift found just above out front slope lighter model less lift needed sustain flight Its rare day theres too much wind because wind increases can fly smaller heavier faster models can stand up Bob Powers iaunches Coyote aileron-andelevator-controlled ship municipal land fill market 15 years Coyote quick smooth filer given sufficient lift can fly best way determine theres enough lift fly watch other Sailplanes second best way watch gulls hawks soaring over slope no other fliers human bird working slope test lift firmly holding model out lift front slope plane wants rise out hand April 1992 17 After final radio check Lou launches Sensoar straight-out lou air plane gains altitude immediately As glider continues climb Lou presses elevator stick forward down elevator prevent stall Spirit rudder-and-alieron-controlled two-meter Thermal contest Sailplane works weil slopes because its semisym metrical airfoil penetrates wind High Sierra two-meter rudder-andelevator-controlled ship clear canopy fiberglass fuselage Weighing models built-up wings pen etrates wind effectively jim Harrigan grabs isat flight day Gentle Lady very competent rudder-and-elevator-controlled ship quite suitabie first gilder N theres enough lift fly Aircraft selection Its important select model airplane suited wind conditions probably Slope Soaring power flying thermal gliding Light windsay 6 10 mphrequires light floater airplanes wing loadings about five eight ounces per square foot wing area category Culpepper Models Chuperosa Cox Silhouette Carl Goldberg Gentle Lady Hobby Horn Sensoar Bob Martin Bobcat Minimax Enterprise Minimax-700 Moderate wind 10 20 mph supports perhaps greatest variety airplanes both polyhedral alleron-controlled wing loadings six 12 ounces per square foot wind Ive great flights Dynaflite Freedom Future Flight Klingberg Wing Great Planes Spirit House Balsa 2x4 Bob Martin Coyote MFA High Sierra RC Products MC-3 Sig Ninja wind roaring 20 mph youll need specialized Slope Soaring ships tend smaller generally have wing loadings 10 ounces higher Examples DCU Dragonfly Douglas Aircraft Quicksilver Fly Night Shadow Bob Martin SR-7 models well moderate wind will fly high wind added weight Slope pilots learn bring lead sheet steel washers ballast Beginner Slope ships use simple radio system two servos controlling rudder elevator advanced models use two channels aileron elevator control Either control system fine basic flying ailerons needed aerobatics Flying wing models typically combine two controls set elevons servos wingeronlpitcheron models pivot 18 Model Aviation Lou Garwood Sig Ninja Lou learned rolls 50-in aileron-andelevator-controlled Sailplane Chuperosa 60-in light-air Slope ship designed hand-launched thermal compe tion can built either rudder-andelevator aileron-and-elevator controls Freedom all-balsa Slope Soarer has aileron elevator control plus speed brakes operated third servo yuu u ruuuy ior someining tarn ana aiieron-and-elevator-controlied Quicksilver Both Bob Powers acro batic Douglas Aircraft ship can fly inverted nearly well fly upright Bob puts Quicksilver through acro batic routine slope lift over Cape Cod bay Photo David Garwood Left typical Slope Soarer fashion Bob Martin Coyow iou elevator servo mounted fuselage aileron servo tne wing Right Peck-Polymers Genesis flying wing uses mechanical V-tail mixer move devon combined elevator aileron control surfaces Left plan-built Chandeil uses mechanical mixer front wing combines rudder elevator servo output control V-tail Another servo located above wing pivot wing roil control Ailerons used Right theory behind use pivoting wingeron instead ailerons roil control moving large surface just little creates less drag moving small surface lot Bob Martin RC Coyote soars slope lift over roiling Hudson River valley hills up state New York Photo Dave Garwood 7 Sig Ninja soars high over Atlantic Cape Cod National Seashore reservation Lou Garwood stays control shore Photo Dave Garwood Sensoar riding slope lift Hudson River Valley Photo Paula Garwood Lou Garwood launches Sensoar 18-foot hill some inland Slope Soaring Photo David Garwood wings together provide pitch control pivot opposite directions roll Continued page 148 Another photo Lou putting up Sen soar Hobby Horn fioater designed light winds Photo David Garwood April 1992 19 Another photo author flying Kling berg Wing inland lift off abandoned highway overpass Photo Rudy Coletti UU0j U 0 OQ 0- 0 0 0 0 - 0 i 0 P -o- g 0 0 0 l 00 U~ 2 _ 0 -2 0 0 0 0 - 0 a bCD 3 0 - 0 oo ~ o 00 0S0UU 0~U o U0 ~0p 0 0 0 0 0 - o0~ 0 00 U S) .tU0-t 00 0 -t0 0 000i 0 0~ 0 00 o 0 2 -i 0 2 - 0 0 Oo U -0 00 P 00 U ~U00- U 0 oea 0 00 0 00 0 C C p4 0 -4 n SI 0 -5 0 N -4 b b C, C 0 C C C3 C C 000 W xxx 0 C M 0 0CO 0 04400-4-4-4-4 0NC30N~400O0 b C -4 x Mxxx xxx xx x M 0 Mx 0-x Mx 0x x 0 M M . CO MMMMMM 0CCC4W xxCaCxaaaxxxNNNCCC xxxxxxxx -40 C000000-4NNCCC3CCM 0-4-4N00NM0 3-4-4N3 0NNC7CN 0 0C000N0MC0-0 0CCCC~CC4CCC4CC xxxxx00xxx ~xxxxxxxxx0)xx000xxx xxxxx MMM-4-4-4CC4C4-4C-4 0 4-N -4N0-4 00 0 OON0CN0CCO ~N-4-4N N000000N0bCN0NCN~M4 CCMCMb 0M0C0-401 N 4 CCCC N MOO 4 0 N N CoN-4 -4 C -4 -40 x x -4 cc 0 mm 0 000a S 0 C C 0 -4-4-4-40 00000 C N -40 C C40N x0xx 2 NN0 4. C MM C M 4C-4-4 04-4C-CC0NN-4 CM0-C 000-4CCCCC C C C C C C C C C C C MM MM N50Np W xxxxxxxx00000 0 ~4xxxxx 0 C MM0 0 NN&MM~ 0 MM 00 N 00 N 004. C C 0 0000000MO00ON u 0 P0 o W C o 00- 0 x 00 0 C r M -5 CC0 C/ r 00 0o C [ ~IIII 0000000000 000000000 W 000 NNN ~M0 0 -4-4-4 0N 0000 CCMMM--4-- 0CC3MN-4 xxxxxxxxOxxxx- 0 M 0 w 0 0 0 w 5 0 0004.M 0M 0 C 4 0C0OM N N N N N 0CC x x M-4 N N C - 0-4 0 000 C0 4000000 O00N0C-0 00 CO 0 4 0 C 0 0 x0xMx0x C xxx. 0M-M-4M-4M CDxMxMxMx CO0x0xMxM 50 0 N00~ N0CMN0CNN400C4N 0 0 ONOCCCCMMO -4M0CM000M0C0C t0C0 C M 00 MC -4 00 0 0 C C MM MM MM MM 1 C C 0 C~CM 0-4-4CCCC x x 000x x x x 0x x x xxxx 4CC44 0 0 C- C, 4 0 C 0 U w C -n H ni 0 C 0 rn -I m 0 w 0 x C C 0 w 0 m z C N 0 N C 0 C N 0 CJ C 0 N CD Gm 0 C0-G zo 11 c20 0 1 0 0 0 0- 0 CcD U o C UU inC 0 U Co 0 0 1 00-ri C-4 130 I0 Z5 rn 0ir1 i-rn 13 II rn models landing area selected radio step confidently edge hill give model firm toss slightly downward direction Yes downward need airspeed altitude point model may balloon upward suddenly prepared push elevator stick forward prevent stall lift model will soon back above hill dont have enough airspeed solid control will crash After few seconds build up speed turn airplane 900 flying parallel slope model will continue gain altitude flying above out front hill Before model becomes too small see make 1800 turn away hill pass front launch position other end circuit make another 180 turn again away hill Youre now flying basic Slope Soaring pattern Seen above its figure eight always turning wind turn wind keep airspeed up ground speed down turns avoid being blown back over hill Being blown back over hill just about worst thing can happen now because lift decreases rapidly turbulence increases sharply behind hill Ill tell about handle section landing Flying slope lift Once youve launched established flight pattern may want explore limits lift zone Generally lift strongest just above slightly out front hill tapers off go higher decreases go farther out Usable lift can range few feet three times height hill 200 feet out front Finding limit lift zone front hill difficult because tapers off gradually Just fly out until gently begin settle bring model back stronger lift stay aloft Flying behind hill hazardous take pains stay out front gain altitude turning smoothly flying strongest part lift strong lift can get up twice height hill two passes weaker lift may take passes gaining foot two time reach crnising altitude reduce altitude mainly intentionally flying areas weaker lift can also lose height raising nose slightly increasing wings angle attack presents flat surface airstream reducing lift speed maneuver similar landing flare precaution same Dont overdo youll stall What once youve got basics aerobatics course Almost anything can done fuel-powered model can done Slope Soarer have experience Tell Control Horn Go Wont Get Bent Out Shape 0 airplane enthusiast know has same problems control horns flex bend break-what else new Introducing Sullivan 555 toughest control horn ever made Craftecl7with tempered steel instead plastic nickelplated wear resistance Sullivan Control Horn 555 built exacting specifications eliminate flex flutter Better still comes complete ass-filled nylon bushing prevent metal-to-metal contact radio interference sized fit either devises Sullivans New Ball Joint System easy off-axis movement Sullivan 555 Finally control horn 1 PRODUCTS thats made right stu 11 P0 Box 5166 Baltimore MD 21224 Getting Better Ideas Off Ground long-wing thermal gliders will probably try loops first Pilots powered models may prefer rolls first departure straight-and-level Before performing either maneuver gain some altitude begin shallow dive build up speed Inverted passes cool flying whole figure-eight pattern inverted supercool Immelmann turns split-Ss Cuban-eights well within performance envelope fast aileron-and-elevator-controlled Slope ships Landing Remember model airplanes rarely get broken flying its contact ground causes casualties Since its hard fly airplane scanning ground find good spot makes sense select landing area before launch three basic landing locations bottom slope itself top What youll need flat spot few trees bushes fences better big flat soft no obstructions First choice beginners land bottom Its safest spot theres enough flat space although may easiest because model harder see distance Start landing flying out away hill leaving strong lift zone model will gradually lose height altitude decreases lift turbulence reduced youre ready land parallel hill turn wind April 1992 149 its Best New OPS 120 four cycle engine its New high lift cam engine proud precision produced long life dependable service Its high torque makes ideal large scale models OPS VS Parts Are Readily Available Part Cometuim ftO44 9c land model would other Landing slope face requires precise control saves walking bottom slope free brush other obstacles fly lowwell below hilltop area reduced lift model will slow down lose altitude fly close hill let model drift upward rising air As climbs loses airspeed airplane reaches point slightly above desired landing spot youre flying foot two ground put nose down grease er its flat enough big enough top hill offers good visibility familiar landing pattern fuel-power thermal glider pilots also offers hazardous condition Slope flyingthe dreaded rotor area minimal lift intense turbulence typical landing approach top gain plenty altitude fly downwind leg time turn downwind away slope face lose altitude crosswind leg make final approach wind trick maintain control flying through diminishing lift increasing turbulence pilot must keep airspeed up maintain control Im kidding about safety airspeed flying through turbulence Youll landing hot land top bill youll need quick fingers safely compensating advantage landing top dont like approach can go aroundsomething generally cant thermal glider landings can warm up flying high approaches instead landing shoot out over edge back slope lift Practice few passes coming down lower time until get hang make low pass actual landing Like lift zone front hill turbulent zone behind hill limited size rotor intensity tapers off move away edge have truly large flat area top hill can fly over rotor land behind typical thermal glider landing choice landing areas depends much personal preference experience topography Ive seen three types landings made three different pilots flying same hill same day Parting thought warning Youve got airplane selected siteand today have wind Add thing repair kit CyA cyanoacrylate glue five-minute epoxy fiberglass cloth Slope flying hard models field repairs can get back air Dont afraid take beat-up models slope theyre sure receive punishment Good looks dont count first year Slope Soaring lift cooking youll want flying instead watching Slope Soaring definitely participant sport definitely addictive Once try may never again satisfied ordinary RC flying References further reading 1 Dave Thornberg Old Buzzards Soaring Book Pony X Press 5 Monticello Drive Albuquerque NM 87123 Two chapters Slope Soaring great writing style 2 Dave Jones Radio Controlled Gliding Argus Books 1 Golden Square London England WiR 3AB Two excellent chapters Keith Thomas Slope Soaring 3 Dave Hughes Radio Controlled Slope Soaring Chart Hobby Distributors Littlehampton West Sussex UK Continued page 1S2 150 Model Aviation 4 0 e AERIAL MODEL AIRCRAFT PRODUCTS AMAP cutter bowl$17900 213 965-9504I AMAP power supply$4900 Anodized available Add$1000 Three-piece fuse T tailor V tail also sell cut cores available airfoils MH42 MH43 MH62 MH64 7003 RGI5 RGI4A Foam cores $5000 soaFull Money-Back 30$35Cfl antee 5 $45 FLAIR SLOPE 11/SPORT ELECTRIC eComplete S6000 Length43Wd h3Hegh 4O&W5ize1otorRjnded Shp-on Nose Cone Fuselage made EZ Lam Epo Density96 X 2 $2900 Aerospace composite PrixtictsBlue Foam 2 lb24 X Will cut shipping 12 X 48 please specify Bob Rntzlaff 1641 South Elismere Ave Los Angles CA 90019 ASW 17 1/4 Scale 4 M Basic Kit $28500 Thermal Phase Hand Launch 60 E 387 $5000 BflNAJER RIRCRRFT DESIGNS BRB KITS FLY BEST WS 52 1050 sqin Length 54 Weight 9511051b UltimatePRICE $295 KITS INCLUDE Epoxyglass fuse bellypan cowl cock pit lpants applicable Virgin bead foam wing cores wings 1 piece internal formers machine cut birch ACR t ply Illustrated construction manual Clear butyrate canopy Preformed T-6 aluminum landing gear Plug stab kit TO ORDER CALL 215-759-3179 5717 Sullivan Trail Nazareth PA 18064 VISA/MC ACCEPTED definitive work 17 chapters five appendices 4 Stan Eames Sal DeFrancesco Slope Soaring Inland Sites NSP 1991 Northeast Sailplane Products catalog Northeast Sailplane Products 16 Kirby Lane Williston VT 05495 Note British publications listed available US booksellers yes want write about Slope Soaring does help name Dave ng Fun/Mathews Continued page 47 SO WHAT R VA BUILUN Ever notice thats first thing two dedicated modelers ask other meet during winter months Sure intensely dedicated sorts wh fly feet snow temperature below 30 F0 us prefer spend modeling time warm shop cold winter days building things fly weather becomes hospitable also awfully good days spending some time repairing little things last flying seasons models temporary repair can fixed correctly worn-out components replaced radio equipment returned repair station annual servicing course batteries cycled month Im growing about half paranoid over hinges Last flying season seemed hinge year total wipe-out prototype aileron fell off managed land another model rudder hanging pushrod another instance did usual pre-flight pull test have elevator come loose fingers dont think its fair condemn particular brand hinges last seasons troubles Rather think blame lies lots use own poor technique point never preswne hinges tight check ON SAFETY CHECKS brings another thing mind As anyone has flown IMAA event knows group insists safety checks before allowing model fly would least presume fly big models would well above average construction maintenance skills Yet nearly fly-in Ive attended safety inspectors have discovered least model defects would have endangered model spectators other pilots well Some fliers seem offended safety checks seems rather vain Regardless well model built maintained well owner has pre flighted host things might miss Its redundancy thing see times something inspected less likelihood some little detail slipping Thats called quality control isnt Frankly can speculate safety inspections arent part fun fly scene Id sure hate hurt someone hurt someone result some little thing failing because Id grown accustomed looking no longer really saw Wouldnt JUMBO RUBBER POWER month coincidence have 1WLK WIAVLFOAMAIRE 10 SPAN 30-33 LBS 50-75 CC POWER 74 IN WING SPAN 6-7 LBS 45-60 POWER 10 SPAN ,o-42 CC POWER 5-10 LB PAYLOAD OPTIONAL SPREADER4 CH PLY FOAM AND BALSA WOOD CHOOSE 3 UM 4 1 SLOW AND STABLE KIT $26995 SPDKiT$1995 T $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOG T 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERS tpIanecompaaIv SA/MASTERCARD 152 Model Aviation EChu8hcket30Th4eIt 0 N S Y Issa 30AbI8hfl 90 TS CtIW04sI w 6,-~99o SET POSP&H 0,4sOT.WARNING AIRCRAFTIRADIO ID LABEL SETS Identify yaur aircraft per AMA safety rules Sef stc abe s am 0as81088818 $4ooar8n Send eke onee S3ndoIes 950aM $4850 0888810 t9SOPIus 08040 $090 toBaadus Ernepoeo P080 8 NOVa C NY 002 LATNES MILLS METALO BOOKS -PRECIOION TNSTAUMENTS COMPLETE CATALOG $2 00 Ts stems 000011 5beRad c 4I50aoyfald OH 4550$ COMPAC5528562 WS 66 883 sqin 90 108 2U 120 41 Length 60 Weight 95/1051b Also Avail able Extra 230 Version Extra 3XPRICE $240 WS 66 -883 sqin Length 59 90 108 2C 120 4C Weight 95/lOSIb Sukhoi SU-26MPRICE $240 Continued page 154
Edition: Model Aviation - 1992/04
Page Numbers: 16, 17, 18, 19, 148, 149, 150, 152
Jim Harrigan pilots Gentie Lady iight lift over picturesque New Engiand vaiiey SLOPE SOARING amazing seems like magic Sure scientific principles meteorology aerodynamics explain works throwing unpowered heavier-than-air model off hill running through aerobatic routine landing hour later does seem magical Slope Soaring offers lot RC fliers Its inexpensive buy no fuel generally fly simple airplanes simple radios Its exhilarating can fly howling wind other RC pilots grounded Its challenging have pay attention fly unpowered airplane 25mph wind once youve mastered basics can fly aerobatics try Combat pylon racing Some modelers hesitant throw model off rocky ledge dead-stick takeoff havent tried interested article explains survive slope lift works glider always descending relative its surrounding air mass can rise relative ground Left author flying Future Flight Kilngberg Wing moderate lift over abandoned highway overpass summer leaves trees upwind slope create enough turbulence make site unsuitable flying Right Bob Powers tests lift two-meter aileron-and-elevator-controlled Sailplane JIm Harrigan waits House Balsa two-channel glider 2x4 16 Model Aviation Lou Garwood about launch Sensoar teat lift amount available lilt gIven site varies wIth changing wind speed wind direction air mass rising faster glider falling condition exists thermals slope lift wind blows against slope airflow forced upward uphill flow creates source rising air supports birds sailplanes Gulls use slope lift fly miles along seacoast dunes single wingbeat Slope Soarers can same Wind enemy thermal glider pilot its friend Slope glider pilot starters youll need 8-mph faster wind blowing straight almost straight hillside Adequate lift depends wind speed slope shape also wind direction directly wind blows slope greater lift can fly slight crosswind maybe up 200 either way lift reduced skill required After initial right turn fiy parallel siope Lou makes 1800 left turn end circuit strongest lift found just above out front slope lighter model less lift needed sustain flight Its rare day theres too much wind because wind increases can fly smaller heavier faster models can stand up Bob Powers iaunches Coyote aileron-andelevator-controlled ship municipal land fill market 15 years Coyote quick smooth filer given sufficient lift can fly best way determine theres enough lift fly watch other Sailplanes second best way watch gulls hawks soaring over slope no other fliers human bird working slope test lift firmly holding model out lift front slope plane wants rise out hand April 1992 17 After final radio check Lou launches Sensoar straight-out lou air plane gains altitude immediately As glider continues climb Lou presses elevator stick forward down elevator prevent stall Spirit rudder-and-alieron-controlled two-meter Thermal contest Sailplane works weil slopes because its semisym metrical airfoil penetrates wind High Sierra two-meter rudder-andelevator-controlled ship clear canopy fiberglass fuselage Weighing models built-up wings pen etrates wind effectively jim Harrigan grabs isat flight day Gentle Lady very competent rudder-and-elevator-controlled ship quite suitabie first gilder N theres enough lift fly Aircraft selection Its important select model airplane suited wind conditions probably Slope Soaring power flying thermal gliding Light windsay 6 10 mphrequires light floater airplanes wing loadings about five eight ounces per square foot wing area category Culpepper Models Chuperosa Cox Silhouette Carl Goldberg Gentle Lady Hobby Horn Sensoar Bob Martin Bobcat Minimax Enterprise Minimax-700 Moderate wind 10 20 mph supports perhaps greatest variety airplanes both polyhedral alleron-controlled wing loadings six 12 ounces per square foot wind Ive great flights Dynaflite Freedom Future Flight Klingberg Wing Great Planes Spirit House Balsa 2x4 Bob Martin Coyote MFA High Sierra RC Products MC-3 Sig Ninja wind roaring 20 mph youll need specialized Slope Soaring ships tend smaller generally have wing loadings 10 ounces higher Examples DCU Dragonfly Douglas Aircraft Quicksilver Fly Night Shadow Bob Martin SR-7 models well moderate wind will fly high wind added weight Slope pilots learn bring lead sheet steel washers ballast Beginner Slope ships use simple radio system two servos controlling rudder elevator advanced models use two channels aileron elevator control Either control system fine basic flying ailerons needed aerobatics Flying wing models typically combine two controls set elevons servos wingeronlpitcheron models pivot 18 Model Aviation Lou Garwood Sig Ninja Lou learned rolls 50-in aileron-andelevator-controlled Sailplane Chuperosa 60-in light-air Slope ship designed hand-launched thermal compe tion can built either rudder-andelevator aileron-and-elevator controls Freedom all-balsa Slope Soarer has aileron elevator control plus speed brakes operated third servo yuu u ruuuy ior someining tarn ana aiieron-and-elevator-controlied Quicksilver Both Bob Powers acro batic Douglas Aircraft ship can fly inverted nearly well fly upright Bob puts Quicksilver through acro batic routine slope lift over Cape Cod bay Photo David Garwood Left typical Slope Soarer fashion Bob Martin Coyow iou elevator servo mounted fuselage aileron servo tne wing Right Peck-Polymers Genesis flying wing uses mechanical V-tail mixer move devon combined elevator aileron control surfaces Left plan-built Chandeil uses mechanical mixer front wing combines rudder elevator servo output control V-tail Another servo located above wing pivot wing roil control Ailerons used Right theory behind use pivoting wingeron instead ailerons roil control moving large surface just little creates less drag moving small surface lot Bob Martin RC Coyote soars slope lift over roiling Hudson River valley hills up state New York Photo Dave Garwood 7 Sig Ninja soars high over Atlantic Cape Cod National Seashore reservation Lou Garwood stays control shore Photo Dave Garwood Sensoar riding slope lift Hudson River Valley Photo Paula Garwood Lou Garwood launches Sensoar 18-foot hill some inland Slope Soaring Photo David Garwood wings together provide pitch control pivot opposite directions roll Continued page 148 Another photo Lou putting up Sen soar Hobby Horn fioater designed light winds Photo David Garwood April 1992 19 Another photo author flying Kling berg Wing inland lift off abandoned highway overpass Photo Rudy Coletti UU0j U 0 OQ 0- 0 0 0 0 - 0 i 0 P -o- g 0 0 0 l 00 U~ 2 _ 0 -2 0 0 0 0 - 0 a bCD 3 0 - 0 oo ~ o 00 0S0UU 0~U o U0 ~0p 0 0 0 0 0 - o0~ 0 00 U S) .tU0-t 00 0 -t0 0 000i 0 0~ 0 00 o 0 2 -i 0 2 - 0 0 Oo U -0 00 P 00 U ~U00- U 0 oea 0 00 0 00 0 C C p4 0 -4 n SI 0 -5 0 N -4 b b C, C 0 C C C3 C C 000 W xxx 0 C M 0 0CO 0 04400-4-4-4-4 0NC30N~400O0 b C -4 x Mxxx xxx xx x M 0 Mx 0-x Mx 0x x 0 M M . CO MMMMMM 0CCC4W xxCaCxaaaxxxNNNCCC xxxxxxxx -40 C000000-4NNCCC3CCM 0-4-4N00NM0 3-4-4N3 0NNC7CN 0 0C000N0MC0-0 0CCCC~CC4CCC4CC xxxxx00xxx ~xxxxxxxxx0)xx000xxx xxxxx MMM-4-4-4CC4C4-4C-4 0 4-N -4N0-4 00 0 OON0CN0CCO ~N-4-4N N000000N0bCN0NCN~M4 CCMCMb 0M0C0-401 N 4 CCCC N MOO 4 0 N N CoN-4 -4 C -4 -40 x x -4 cc 0 mm 0 000a S 0 C C 0 -4-4-4-40 00000 C N -40 C C40N x0xx 2 NN0 4. C MM C M 4C-4-4 04-4C-CC0NN-4 CM0-C 000-4CCCCC C C C C C C C C C C C MM MM N50Np W xxxxxxxx00000 0 ~4xxxxx 0 C MM0 0 NN&MM~ 0 MM 00 N 00 N 004. C C 0 0000000MO00ON u 0 P0 o W C o 00- 0 x 00 0 C r M -5 CC0 C/ r 00 0o C [ ~IIII 0000000000 000000000 W 000 NNN ~M0 0 -4-4-4 0N 0000 CCMMM--4-- 0CC3MN-4 xxxxxxxxOxxxx- 0 M 0 w 0 0 0 w 5 0 0004.M 0M 0 C 4 0C0OM N N N N N 0CC x x M-4 N N C - 0-4 0 000 C0 4000000 O00N0C-0 00 CO 0 4 0 C 0 0 x0xMx0x C xxx. 0M-M-4M-4M CDxMxMxMx CO0x0xMxM 50 0 N00~ N0CMN0CNN400C4N 0 0 ONOCCCCMMO -4M0CM000M0C0C t0C0 C M 00 MC -4 00 0 0 C C MM MM MM MM 1 C C 0 C~CM 0-4-4CCCC x x 000x x x x 0x x x xxxx 4CC44 0 0 C- C, 4 0 C 0 U w C -n H ni 0 C 0 rn -I m 0 w 0 x C C 0 w 0 m z C N 0 N C 0 C N 0 CJ C 0 N CD Gm 0 C0-G zo 11 c20 0 1 0 0 0 0- 0 CcD U o C UU inC 0 U Co 0 0 1 00-ri C-4 130 I0 Z5 rn 0ir1 i-rn 13 II rn models landing area selected radio step confidently edge hill give model firm toss slightly downward direction Yes downward need airspeed altitude point model may balloon upward suddenly prepared push elevator stick forward prevent stall lift model will soon back above hill dont have enough airspeed solid control will crash After few seconds build up speed turn airplane 900 flying parallel slope model will continue gain altitude flying above out front hill Before model becomes too small see make 1800 turn away hill pass front launch position other end circuit make another 180 turn again away hill Youre now flying basic Slope Soaring pattern Seen above its figure eight always turning wind turn wind keep airspeed up ground speed down turns avoid being blown back over hill Being blown back over hill just about worst thing can happen now because lift decreases rapidly turbulence increases sharply behind hill Ill tell about handle section landing Flying slope lift Once youve launched established flight pattern may want explore limits lift zone Generally lift strongest just above slightly out front hill tapers off go higher decreases go farther out Usable lift can range few feet three times height hill 200 feet out front Finding limit lift zone front hill difficult because tapers off gradually Just fly out until gently begin settle bring model back stronger lift stay aloft Flying behind hill hazardous take pains stay out front gain altitude turning smoothly flying strongest part lift strong lift can get up twice height hill two passes weaker lift may take passes gaining foot two time reach crnising altitude reduce altitude mainly intentionally flying areas weaker lift can also lose height raising nose slightly increasing wings angle attack presents flat surface airstream reducing lift speed maneuver similar landing flare precaution same Dont overdo youll stall What once youve got basics aerobatics course Almost anything can done fuel-powered model can done Slope Soarer have experience Tell Control Horn Go Wont Get Bent Out Shape 0 airplane enthusiast know has same problems control horns flex bend break-what else new Introducing Sullivan 555 toughest control horn ever made Craftecl7with tempered steel instead plastic nickelplated wear resistance Sullivan Control Horn 555 built exacting specifications eliminate flex flutter Better still comes complete ass-filled nylon bushing prevent metal-to-metal contact radio interference sized fit either devises Sullivans New Ball Joint System easy off-axis movement Sullivan 555 Finally control horn 1 PRODUCTS thats made right stu 11 P0 Box 5166 Baltimore MD 21224 Getting Better Ideas Off Ground long-wing thermal gliders will probably try loops first Pilots powered models may prefer rolls first departure straight-and-level Before performing either maneuver gain some altitude begin shallow dive build up speed Inverted passes cool flying whole figure-eight pattern inverted supercool Immelmann turns split-Ss Cuban-eights well within performance envelope fast aileron-and-elevator-controlled Slope ships Landing Remember model airplanes rarely get broken flying its contact ground causes casualties Since its hard fly airplane scanning ground find good spot makes sense select landing area before launch three basic landing locations bottom slope itself top What youll need flat spot few trees bushes fences better big flat soft no obstructions First choice beginners land bottom Its safest spot theres enough flat space although may easiest because model harder see distance Start landing flying out away hill leaving strong lift zone model will gradually lose height altitude decreases lift turbulence reduced youre ready land parallel hill turn wind April 1992 149 its Best New OPS 120 four cycle engine its New high lift cam engine proud precision produced long life dependable service Its high torque makes ideal large scale models OPS VS Parts Are Readily Available Part Cometuim ftO44 9c land model would other Landing slope face requires precise control saves walking bottom slope free brush other obstacles fly lowwell below hilltop area reduced lift model will slow down lose altitude fly close hill let model drift upward rising air As climbs loses airspeed airplane reaches point slightly above desired landing spot youre flying foot two ground put nose down grease er its flat enough big enough top hill offers good visibility familiar landing pattern fuel-power thermal glider pilots also offers hazardous condition Slope flyingthe dreaded rotor area minimal lift intense turbulence typical landing approach top gain plenty altitude fly downwind leg time turn downwind away slope face lose altitude crosswind leg make final approach wind trick maintain control flying through diminishing lift increasing turbulence pilot must keep airspeed up maintain control Im kidding about safety airspeed flying through turbulence Youll landing hot land top bill youll need quick fingers safely compensating advantage landing top dont like approach can go aroundsomething generally cant thermal glider landings can warm up flying high approaches instead landing shoot out over edge back slope lift Practice few passes coming down lower time until get hang make low pass actual landing Like lift zone front hill turbulent zone behind hill limited size rotor intensity tapers off move away edge have truly large flat area top hill can fly over rotor land behind typical thermal glider landing choice landing areas depends much personal preference experience topography Ive seen three types landings made three different pilots flying same hill same day Parting thought warning Youve got airplane selected siteand today have wind Add thing repair kit CyA cyanoacrylate glue five-minute epoxy fiberglass cloth Slope flying hard models field repairs can get back air Dont afraid take beat-up models slope theyre sure receive punishment Good looks dont count first year Slope Soaring lift cooking youll want flying instead watching Slope Soaring definitely participant sport definitely addictive Once try may never again satisfied ordinary RC flying References further reading 1 Dave Thornberg Old Buzzards Soaring Book Pony X Press 5 Monticello Drive Albuquerque NM 87123 Two chapters Slope Soaring great writing style 2 Dave Jones Radio Controlled Gliding Argus Books 1 Golden Square London England WiR 3AB Two excellent chapters Keith Thomas Slope Soaring 3 Dave Hughes Radio Controlled Slope Soaring Chart Hobby Distributors Littlehampton West Sussex UK Continued page 1S2 150 Model Aviation 4 0 e AERIAL MODEL AIRCRAFT PRODUCTS AMAP cutter bowl$17900 213 965-9504I AMAP power supply$4900 Anodized available Add$1000 Three-piece fuse T tailor V tail also sell cut cores available airfoils MH42 MH43 MH62 MH64 7003 RGI5 RGI4A Foam cores $5000 soaFull Money-Back 30$35Cfl antee 5 $45 FLAIR SLOPE 11/SPORT ELECTRIC eComplete S6000 Length43Wd h3Hegh 4O&W5ize1otorRjnded Shp-on Nose Cone Fuselage made EZ Lam Epo Density96 X 2 $2900 Aerospace composite PrixtictsBlue Foam 2 lb24 X Will cut shipping 12 X 48 please specify Bob Rntzlaff 1641 South Elismere Ave Los Angles CA 90019 ASW 17 1/4 Scale 4 M Basic Kit $28500 Thermal Phase Hand Launch 60 E 387 $5000 BflNAJER RIRCRRFT DESIGNS BRB KITS FLY BEST WS 52 1050 sqin Length 54 Weight 9511051b UltimatePRICE $295 KITS INCLUDE Epoxyglass fuse bellypan cowl cock pit lpants applicable Virgin bead foam wing cores wings 1 piece internal formers machine cut birch ACR t ply Illustrated construction manual Clear butyrate canopy Preformed T-6 aluminum landing gear Plug stab kit TO ORDER CALL 215-759-3179 5717 Sullivan Trail Nazareth PA 18064 VISA/MC ACCEPTED definitive work 17 chapters five appendices 4 Stan Eames Sal DeFrancesco Slope Soaring Inland Sites NSP 1991 Northeast Sailplane Products catalog Northeast Sailplane Products 16 Kirby Lane Williston VT 05495 Note British publications listed available US booksellers yes want write about Slope Soaring does help name Dave ng Fun/Mathews Continued page 47 SO WHAT R VA BUILUN Ever notice thats first thing two dedicated modelers ask other meet during winter months Sure intensely dedicated sorts wh fly feet snow temperature below 30 F0 us prefer spend modeling time warm shop cold winter days building things fly weather becomes hospitable also awfully good days spending some time repairing little things last flying seasons models temporary repair can fixed correctly worn-out components replaced radio equipment returned repair station annual servicing course batteries cycled month Im growing about half paranoid over hinges Last flying season seemed hinge year total wipe-out prototype aileron fell off managed land another model rudder hanging pushrod another instance did usual pre-flight pull test have elevator come loose fingers dont think its fair condemn particular brand hinges last seasons troubles Rather think blame lies lots use own poor technique point never preswne hinges tight check ON SAFETY CHECKS brings another thing mind As anyone has flown IMAA event knows group insists safety checks before allowing model fly would least presume fly big models would well above average construction maintenance skills Yet nearly fly-in Ive attended safety inspectors have discovered least model defects would have endangered model spectators other pilots well Some fliers seem offended safety checks seems rather vain Regardless well model built maintained well owner has pre flighted host things might miss Its redundancy thing see times something inspected less likelihood some little detail slipping Thats called quality control isnt Frankly can speculate safety inspections arent part fun fly scene Id sure hate hurt someone hurt someone result some little thing failing because Id grown accustomed looking no longer really saw Wouldnt JUMBO RUBBER POWER month coincidence have 1WLK WIAVLFOAMAIRE 10 SPAN 30-33 LBS 50-75 CC POWER 74 IN WING SPAN 6-7 LBS 45-60 POWER 10 SPAN ,o-42 CC POWER 5-10 LB PAYLOAD OPTIONAL SPREADER4 CH PLY FOAM AND BALSA WOOD CHOOSE 3 UM 4 1 SLOW AND STABLE KIT $26995 SPDKiT$1995 T $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOG T 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERS tpIanecompaaIv SA/MASTERCARD 152 Model Aviation EChu8hcket30Th4eIt 0 N S Y Issa 30AbI8hfl 90 TS CtIW04sI w 6,-~99o SET POSP&H 0,4sOT.WARNING AIRCRAFTIRADIO ID LABEL SETS Identify yaur aircraft per AMA safety rules Sef stc abe s am 0as81088818 $4ooar8n Send eke onee S3ndoIes 950aM $4850 0888810 t9SOPIus 08040 $090 toBaadus Ernepoeo P080 8 NOVa C NY 002 LATNES MILLS METALO BOOKS -PRECIOION TNSTAUMENTS COMPLETE CATALOG $2 00 Ts stems 000011 5beRad c 4I50aoyfald OH 4550$ COMPAC5528562 WS 66 883 sqin 90 108 2U 120 41 Length 60 Weight 95/1051b Also Avail able Extra 230 Version Extra 3XPRICE $240 WS 66 -883 sqin Length 59 90 108 2C 120 4C Weight 95/lOSIb Sukhoi SU-26MPRICE $240 Continued page 154
Edition: Model Aviation - 1992/04
Page Numbers: 16, 17, 18, 19, 148, 149, 150, 152
Jim Harrigan pilots Gentie Lady iight lift over picturesque New Engiand vaiiey SLOPE SOARING amazing seems like magic Sure scientific principles meteorology aerodynamics explain works throwing unpowered heavier-than-air model off hill running through aerobatic routine landing hour later does seem magical Slope Soaring offers lot RC fliers Its inexpensive buy no fuel generally fly simple airplanes simple radios Its exhilarating can fly howling wind other RC pilots grounded Its challenging have pay attention fly unpowered airplane 25mph wind once youve mastered basics can fly aerobatics try Combat pylon racing Some modelers hesitant throw model off rocky ledge dead-stick takeoff havent tried interested article explains survive slope lift works glider always descending relative its surrounding air mass can rise relative ground Left author flying Future Flight Kilngberg Wing moderate lift over abandoned highway overpass summer leaves trees upwind slope create enough turbulence make site unsuitable flying Right Bob Powers tests lift two-meter aileron-and-elevator-controlled Sailplane JIm Harrigan waits House Balsa two-channel glider 2x4 16 Model Aviation Lou Garwood about launch Sensoar teat lift amount available lilt gIven site varies wIth changing wind speed wind direction air mass rising faster glider falling condition exists thermals slope lift wind blows against slope airflow forced upward uphill flow creates source rising air supports birds sailplanes Gulls use slope lift fly miles along seacoast dunes single wingbeat Slope Soarers can same Wind enemy thermal glider pilot its friend Slope glider pilot starters youll need 8-mph faster wind blowing straight almost straight hillside Adequate lift depends wind speed slope shape also wind direction directly wind blows slope greater lift can fly slight crosswind maybe up 200 either way lift reduced skill required After initial right turn fiy parallel siope Lou makes 1800 left turn end circuit strongest lift found just above out front slope lighter model less lift needed sustain flight Its rare day theres too much wind because wind increases can fly smaller heavier faster models can stand up Bob Powers iaunches Coyote aileron-andelevator-controlled ship municipal land fill market 15 years Coyote quick smooth filer given sufficient lift can fly best way determine theres enough lift fly watch other Sailplanes second best way watch gulls hawks soaring over slope no other fliers human bird working slope test lift firmly holding model out lift front slope plane wants rise out hand April 1992 17 After final radio check Lou launches Sensoar straight-out lou air plane gains altitude immediately As glider continues climb Lou presses elevator stick forward down elevator prevent stall Spirit rudder-and-alieron-controlled two-meter Thermal contest Sailplane works weil slopes because its semisym metrical airfoil penetrates wind High Sierra two-meter rudder-andelevator-controlled ship clear canopy fiberglass fuselage Weighing models built-up wings pen etrates wind effectively jim Harrigan grabs isat flight day Gentle Lady very competent rudder-and-elevator-controlled ship quite suitabie first gilder N theres enough lift fly Aircraft selection Its important select model airplane suited wind conditions probably Slope Soaring power flying thermal gliding Light windsay 6 10 mphrequires light floater airplanes wing loadings about five eight ounces per square foot wing area category Culpepper Models Chuperosa Cox Silhouette Carl Goldberg Gentle Lady Hobby Horn Sensoar Bob Martin Bobcat Minimax Enterprise Minimax-700 Moderate wind 10 20 mph supports perhaps greatest variety airplanes both polyhedral alleron-controlled wing loadings six 12 ounces per square foot wind Ive great flights Dynaflite Freedom Future Flight Klingberg Wing Great Planes Spirit House Balsa 2x4 Bob Martin Coyote MFA High Sierra RC Products MC-3 Sig Ninja wind roaring 20 mph youll need specialized Slope Soaring ships tend smaller generally have wing loadings 10 ounces higher Examples DCU Dragonfly Douglas Aircraft Quicksilver Fly Night Shadow Bob Martin SR-7 models well moderate wind will fly high wind added weight Slope pilots learn bring lead sheet steel washers ballast Beginner Slope ships use simple radio system two servos controlling rudder elevator advanced models use two channels aileron elevator control Either control system fine basic flying ailerons needed aerobatics Flying wing models typically combine two controls set elevons servos wingeronlpitcheron models pivot 18 Model Aviation Lou Garwood Sig Ninja Lou learned rolls 50-in aileron-andelevator-controlled Sailplane Chuperosa 60-in light-air Slope ship designed hand-launched thermal compe tion can built either rudder-andelevator aileron-and-elevator controls Freedom all-balsa Slope Soarer has aileron elevator control plus speed brakes operated third servo yuu u ruuuy ior someining tarn ana aiieron-and-elevator-controlied Quicksilver Both Bob Powers acro batic Douglas Aircraft ship can fly inverted nearly well fly upright Bob puts Quicksilver through acro batic routine slope lift over Cape Cod bay Photo David Garwood Left typical Slope Soarer fashion Bob Martin Coyow iou elevator servo mounted fuselage aileron servo tne wing Right Peck-Polymers Genesis flying wing uses mechanical V-tail mixer move devon combined elevator aileron control surfaces Left plan-built Chandeil uses mechanical mixer front wing combines rudder elevator servo output control V-tail Another servo located above wing pivot wing roil control Ailerons used Right theory behind use pivoting wingeron instead ailerons roil control moving large surface just little creates less drag moving small surface lot Bob Martin RC Coyote soars slope lift over roiling Hudson River valley hills up state New York Photo Dave Garwood 7 Sig Ninja soars high over Atlantic Cape Cod National Seashore reservation Lou Garwood stays control shore Photo Dave Garwood Sensoar riding slope lift Hudson River Valley Photo Paula Garwood Lou Garwood launches Sensoar 18-foot hill some inland Slope Soaring Photo David Garwood wings together provide pitch control pivot opposite directions roll Continued page 148 Another photo Lou putting up Sen soar Hobby Horn fioater designed light winds Photo David Garwood April 1992 19 Another photo author flying Kling berg Wing inland lift off abandoned highway overpass Photo Rudy Coletti UU0j U 0 OQ 0- 0 0 0 0 - 0 i 0 P -o- g 0 0 0 l 00 U~ 2 _ 0 -2 0 0 0 0 - 0 a bCD 3 0 - 0 oo ~ o 00 0S0UU 0~U o U0 ~0p 0 0 0 0 0 - o0~ 0 00 U S) .tU0-t 00 0 -t0 0 000i 0 0~ 0 00 o 0 2 -i 0 2 - 0 0 Oo U -0 00 P 00 U ~U00- U 0 oea 0 00 0 00 0 C C p4 0 -4 n SI 0 -5 0 N -4 b b C, C 0 C C C3 C C 000 W xxx 0 C M 0 0CO 0 04400-4-4-4-4 0NC30N~400O0 b C -4 x Mxxx xxx xx x M 0 Mx 0-x Mx 0x x 0 M M . CO MMMMMM 0CCC4W xxCaCxaaaxxxNNNCCC xxxxxxxx -40 C000000-4NNCCC3CCM 0-4-4N00NM0 3-4-4N3 0NNC7CN 0 0C000N0MC0-0 0CCCC~CC4CCC4CC xxxxx00xxx ~xxxxxxxxx0)xx000xxx xxxxx MMM-4-4-4CC4C4-4C-4 0 4-N -4N0-4 00 0 OON0CN0CCO ~N-4-4N N000000N0bCN0NCN~M4 CCMCMb 0M0C0-401 N 4 CCCC N MOO 4 0 N N CoN-4 -4 C -4 -40 x x -4 cc 0 mm 0 000a S 0 C C 0 -4-4-4-40 00000 C N -40 C C40N x0xx 2 NN0 4. C MM C M 4C-4-4 04-4C-CC0NN-4 CM0-C 000-4CCCCC C C C C C C C C C C C MM MM N50Np W xxxxxxxx00000 0 ~4xxxxx 0 C MM0 0 NN&MM~ 0 MM 00 N 00 N 004. C C 0 0000000MO00ON u 0 P0 o W C o 00- 0 x 00 0 C r M -5 CC0 C/ r 00 0o C [ ~IIII 0000000000 000000000 W 000 NNN ~M0 0 -4-4-4 0N 0000 CCMMM--4-- 0CC3MN-4 xxxxxxxxOxxxx- 0 M 0 w 0 0 0 w 5 0 0004.M 0M 0 C 4 0C0OM N N N N N 0CC x x M-4 N N C - 0-4 0 000 C0 4000000 O00N0C-0 00 CO 0 4 0 C 0 0 x0xMx0x C xxx. 0M-M-4M-4M CDxMxMxMx CO0x0xMxM 50 0 N00~ N0CMN0CNN400C4N 0 0 ONOCCCCMMO -4M0CM000M0C0C t0C0 C M 00 MC -4 00 0 0 C C MM MM MM MM 1 C C 0 C~CM 0-4-4CCCC x x 000x x x x 0x x x xxxx 4CC44 0 0 C- C, 4 0 C 0 U w C -n H ni 0 C 0 rn -I m 0 w 0 x C C 0 w 0 m z C N 0 N C 0 C N 0 CJ C 0 N CD Gm 0 C0-G zo 11 c20 0 1 0 0 0 0- 0 CcD U o C UU inC 0 U Co 0 0 1 00-ri C-4 130 I0 Z5 rn 0ir1 i-rn 13 II rn models landing area selected radio step confidently edge hill give model firm toss slightly downward direction Yes downward need airspeed altitude point model may balloon upward suddenly prepared push elevator stick forward prevent stall lift model will soon back above hill dont have enough airspeed solid control will crash After few seconds build up speed turn airplane 900 flying parallel slope model will continue gain altitude flying above out front hill Before model becomes too small see make 1800 turn away hill pass front launch position other end circuit make another 180 turn again away hill Youre now flying basic Slope Soaring pattern Seen above its figure eight always turning wind turn wind keep airspeed up ground speed down turns avoid being blown back over hill Being blown back over hill just about worst thing can happen now because lift decreases rapidly turbulence increases sharply behind hill Ill tell about handle section landing Flying slope lift Once youve launched established flight pattern may want explore limits lift zone Generally lift strongest just above slightly out front hill tapers off go higher decreases go farther out Usable lift can range few feet three times height hill 200 feet out front Finding limit lift zone front hill difficult because tapers off gradually Just fly out until gently begin settle bring model back stronger lift stay aloft Flying behind hill hazardous take pains stay out front gain altitude turning smoothly flying strongest part lift strong lift can get up twice height hill two passes weaker lift may take passes gaining foot two time reach crnising altitude reduce altitude mainly intentionally flying areas weaker lift can also lose height raising nose slightly increasing wings angle attack presents flat surface airstream reducing lift speed maneuver similar landing flare precaution same Dont overdo youll stall What once youve got basics aerobatics course Almost anything can done fuel-powered model can done Slope Soarer have experience Tell Control Horn Go Wont Get Bent Out Shape 0 airplane enthusiast know has same problems control horns flex bend break-what else new Introducing Sullivan 555 toughest control horn ever made Craftecl7with tempered steel instead plastic nickelplated wear resistance Sullivan Control Horn 555 built exacting specifications eliminate flex flutter Better still comes complete ass-filled nylon bushing prevent metal-to-metal contact radio interference sized fit either devises Sullivans New Ball Joint System easy off-axis movement Sullivan 555 Finally control horn 1 PRODUCTS thats made right stu 11 P0 Box 5166 Baltimore MD 21224 Getting Better Ideas Off Ground long-wing thermal gliders will probably try loops first Pilots powered models may prefer rolls first departure straight-and-level Before performing either maneuver gain some altitude begin shallow dive build up speed Inverted passes cool flying whole figure-eight pattern inverted supercool Immelmann turns split-Ss Cuban-eights well within performance envelope fast aileron-and-elevator-controlled Slope ships Landing Remember model airplanes rarely get broken flying its contact ground causes casualties Since its hard fly airplane scanning ground find good spot makes sense select landing area before launch three basic landing locations bottom slope itself top What youll need flat spot few trees bushes fences better big flat soft no obstructions First choice beginners land bottom Its safest spot theres enough flat space although may easiest because model harder see distance Start landing flying out away hill leaving strong lift zone model will gradually lose height altitude decreases lift turbulence reduced youre ready land parallel hill turn wind April 1992 149 its Best New OPS 120 four cycle engine its New high lift cam engine proud precision produced long life dependable service Its high torque makes ideal large scale models OPS VS Parts Are Readily Available Part Cometuim ftO44 9c land model would other Landing slope face requires precise control saves walking bottom slope free brush other obstacles fly lowwell below hilltop area reduced lift model will slow down lose altitude fly close hill let model drift upward rising air As climbs loses airspeed airplane reaches point slightly above desired landing spot youre flying foot two ground put nose down grease er its flat enough big enough top hill offers good visibility familiar landing pattern fuel-power thermal glider pilots also offers hazardous condition Slope flyingthe dreaded rotor area minimal lift intense turbulence typical landing approach top gain plenty altitude fly downwind leg time turn downwind away slope face lose altitude crosswind leg make final approach wind trick maintain control flying through diminishing lift increasing turbulence pilot must keep airspeed up maintain control Im kidding about safety airspeed flying through turbulence Youll landing hot land top bill youll need quick fingers safely compensating advantage landing top dont like approach can go aroundsomething generally cant thermal glider landings can warm up flying high approaches instead landing shoot out over edge back slope lift Practice few passes coming down lower time until get hang make low pass actual landing Like lift zone front hill turbulent zone behind hill limited size rotor intensity tapers off move away edge have truly large flat area top hill can fly over rotor land behind typical thermal glider landing choice landing areas depends much personal preference experience topography Ive seen three types landings made three different pilots flying same hill same day Parting thought warning Youve got airplane selected siteand today have wind Add thing repair kit CyA cyanoacrylate glue five-minute epoxy fiberglass cloth Slope flying hard models field repairs can get back air Dont afraid take beat-up models slope theyre sure receive punishment Good looks dont count first year Slope Soaring lift cooking youll want flying instead watching Slope Soaring definitely participant sport definitely addictive Once try may never again satisfied ordinary RC flying References further reading 1 Dave Thornberg Old Buzzards Soaring Book Pony X Press 5 Monticello Drive Albuquerque NM 87123 Two chapters Slope Soaring great writing style 2 Dave Jones Radio Controlled Gliding Argus Books 1 Golden Square London England WiR 3AB Two excellent chapters Keith Thomas Slope Soaring 3 Dave Hughes Radio Controlled Slope Soaring Chart Hobby Distributors Littlehampton West Sussex UK Continued page 1S2 150 Model Aviation 4 0 e AERIAL MODEL AIRCRAFT PRODUCTS AMAP cutter bowl$17900 213 965-9504I AMAP power supply$4900 Anodized available Add$1000 Three-piece fuse T tailor V tail also sell cut cores available airfoils MH42 MH43 MH62 MH64 7003 RGI5 RGI4A Foam cores $5000 soaFull Money-Back 30$35Cfl antee 5 $45 FLAIR SLOPE 11/SPORT ELECTRIC eComplete S6000 Length43Wd h3Hegh 4O&W5ize1otorRjnded Shp-on Nose Cone Fuselage made EZ Lam Epo Density96 X 2 $2900 Aerospace composite PrixtictsBlue Foam 2 lb24 X Will cut shipping 12 X 48 please specify Bob Rntzlaff 1641 South Elismere Ave Los Angles CA 90019 ASW 17 1/4 Scale 4 M Basic Kit $28500 Thermal Phase Hand Launch 60 E 387 $5000 BflNAJER RIRCRRFT DESIGNS BRB KITS FLY BEST WS 52 1050 sqin Length 54 Weight 9511051b UltimatePRICE $295 KITS INCLUDE Epoxyglass fuse bellypan cowl cock pit lpants applicable Virgin bead foam wing cores wings 1 piece internal formers machine cut birch ACR t ply Illustrated construction manual Clear butyrate canopy Preformed T-6 aluminum landing gear Plug stab kit TO ORDER CALL 215-759-3179 5717 Sullivan Trail Nazareth PA 18064 VISA/MC ACCEPTED definitive work 17 chapters five appendices 4 Stan Eames Sal DeFrancesco Slope Soaring Inland Sites NSP 1991 Northeast Sailplane Products catalog Northeast Sailplane Products 16 Kirby Lane Williston VT 05495 Note British publications listed available US booksellers yes want write about Slope Soaring does help name Dave ng Fun/Mathews Continued page 47 SO WHAT R VA BUILUN Ever notice thats first thing two dedicated modelers ask other meet during winter months Sure intensely dedicated sorts wh fly feet snow temperature below 30 F0 us prefer spend modeling time warm shop cold winter days building things fly weather becomes hospitable also awfully good days spending some time repairing little things last flying seasons models temporary repair can fixed correctly worn-out components replaced radio equipment returned repair station annual servicing course batteries cycled month Im growing about half paranoid over hinges Last flying season seemed hinge year total wipe-out prototype aileron fell off managed land another model rudder hanging pushrod another instance did usual pre-flight pull test have elevator come loose fingers dont think its fair condemn particular brand hinges last seasons troubles Rather think blame lies lots use own poor technique point never preswne hinges tight check ON SAFETY CHECKS brings another thing mind As anyone has flown IMAA event knows group insists safety checks before allowing model fly would least presume fly big models would well above average construction maintenance skills Yet nearly fly-in Ive attended safety inspectors have discovered least model defects would have endangered model spectators other pilots well Some fliers seem offended safety checks seems rather vain Regardless well model built maintained well owner has pre flighted host things might miss Its redundancy thing see times something inspected less likelihood some little detail slipping Thats called quality control isnt Frankly can speculate safety inspections arent part fun fly scene Id sure hate hurt someone hurt someone result some little thing failing because Id grown accustomed looking no longer really saw Wouldnt JUMBO RUBBER POWER month coincidence have 1WLK WIAVLFOAMAIRE 10 SPAN 30-33 LBS 50-75 CC POWER 74 IN WING SPAN 6-7 LBS 45-60 POWER 10 SPAN ,o-42 CC POWER 5-10 LB PAYLOAD OPTIONAL SPREADER4 CH PLY FOAM AND BALSA WOOD CHOOSE 3 UM 4 1 SLOW AND STABLE KIT $26995 SPDKiT$1995 T $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOG T 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERS tpIanecompaaIv SA/MASTERCARD 152 Model Aviation EChu8hcket30Th4eIt 0 N S Y Issa 30AbI8hfl 90 TS CtIW04sI w 6,-~99o SET POSP&H 0,4sOT.WARNING AIRCRAFTIRADIO ID LABEL SETS Identify yaur aircraft per AMA safety rules Sef stc abe s am 0as81088818 $4ooar8n Send eke onee S3ndoIes 950aM $4850 0888810 t9SOPIus 08040 $090 toBaadus Ernepoeo P080 8 NOVa C NY 002 LATNES MILLS METALO BOOKS -PRECIOION TNSTAUMENTS COMPLETE CATALOG $2 00 Ts stems 000011 5beRad c 4I50aoyfald OH 4550$ COMPAC5528562 WS 66 883 sqin 90 108 2U 120 41 Length 60 Weight 95/1051b Also Avail able Extra 230 Version Extra 3XPRICE $240 WS 66 -883 sqin Length 59 90 108 2C 120 4C Weight 95/lOSIb Sukhoi SU-26MPRICE $240 Continued page 154
Edition: Model Aviation - 1992/04
Page Numbers: 16, 17, 18, 19, 148, 149, 150, 152
Jim Harrigan pilots Gentie Lady iight lift over picturesque New Engiand vaiiey SLOPE SOARING amazing seems like magic Sure scientific principles meteorology aerodynamics explain works throwing unpowered heavier-than-air model off hill running through aerobatic routine landing hour later does seem magical Slope Soaring offers lot RC fliers Its inexpensive buy no fuel generally fly simple airplanes simple radios Its exhilarating can fly howling wind other RC pilots grounded Its challenging have pay attention fly unpowered airplane 25mph wind once youve mastered basics can fly aerobatics try Combat pylon racing Some modelers hesitant throw model off rocky ledge dead-stick takeoff havent tried interested article explains survive slope lift works glider always descending relative its surrounding air mass can rise relative ground Left author flying Future Flight Kilngberg Wing moderate lift over abandoned highway overpass summer leaves trees upwind slope create enough turbulence make site unsuitable flying Right Bob Powers tests lift two-meter aileron-and-elevator-controlled Sailplane JIm Harrigan waits House Balsa two-channel glider 2x4 16 Model Aviation Lou Garwood about launch Sensoar teat lift amount available lilt gIven site varies wIth changing wind speed wind direction air mass rising faster glider falling condition exists thermals slope lift wind blows against slope airflow forced upward uphill flow creates source rising air supports birds sailplanes Gulls use slope lift fly miles along seacoast dunes single wingbeat Slope Soarers can same Wind enemy thermal glider pilot its friend Slope glider pilot starters youll need 8-mph faster wind blowing straight almost straight hillside Adequate lift depends wind speed slope shape also wind direction directly wind blows slope greater lift can fly slight crosswind maybe up 200 either way lift reduced skill required After initial right turn fiy parallel siope Lou makes 1800 left turn end circuit strongest lift found just above out front slope lighter model less lift needed sustain flight Its rare day theres too much wind because wind increases can fly smaller heavier faster models can stand up Bob Powers iaunches Coyote aileron-andelevator-controlled ship municipal land fill market 15 years Coyote quick smooth filer given sufficient lift can fly best way determine theres enough lift fly watch other Sailplanes second best way watch gulls hawks soaring over slope no other fliers human bird working slope test lift firmly holding model out lift front slope plane wants rise out hand April 1992 17 After final radio check Lou launches Sensoar straight-out lou air plane gains altitude immediately As glider continues climb Lou presses elevator stick forward down elevator prevent stall Spirit rudder-and-alieron-controlled two-meter Thermal contest Sailplane works weil slopes because its semisym metrical airfoil penetrates wind High Sierra two-meter rudder-andelevator-controlled ship clear canopy fiberglass fuselage Weighing models built-up wings pen etrates wind effectively jim Harrigan grabs isat flight day Gentle Lady very competent rudder-and-elevator-controlled ship quite suitabie first gilder N theres enough lift fly Aircraft selection Its important select model airplane suited wind conditions probably Slope Soaring power flying thermal gliding Light windsay 6 10 mphrequires light floater airplanes wing loadings about five eight ounces per square foot wing area category Culpepper Models Chuperosa Cox Silhouette Carl Goldberg Gentle Lady Hobby Horn Sensoar Bob Martin Bobcat Minimax Enterprise Minimax-700 Moderate wind 10 20 mph supports perhaps greatest variety airplanes both polyhedral alleron-controlled wing loadings six 12 ounces per square foot wind Ive great flights Dynaflite Freedom Future Flight Klingberg Wing Great Planes Spirit House Balsa 2x4 Bob Martin Coyote MFA High Sierra RC Products MC-3 Sig Ninja wind roaring 20 mph youll need specialized Slope Soaring ships tend smaller generally have wing loadings 10 ounces higher Examples DCU Dragonfly Douglas Aircraft Quicksilver Fly Night Shadow Bob Martin SR-7 models well moderate wind will fly high wind added weight Slope pilots learn bring lead sheet steel washers ballast Beginner Slope ships use simple radio system two servos controlling rudder elevator advanced models use two channels aileron elevator control Either control system fine basic flying ailerons needed aerobatics Flying wing models typically combine two controls set elevons servos wingeronlpitcheron models pivot 18 Model Aviation Lou Garwood Sig Ninja Lou learned rolls 50-in aileron-andelevator-controlled Sailplane Chuperosa 60-in light-air Slope ship designed hand-launched thermal compe tion can built either rudder-andelevator aileron-and-elevator controls Freedom all-balsa Slope Soarer has aileron elevator control plus speed brakes operated third servo yuu u ruuuy ior someining tarn ana aiieron-and-elevator-controlied Quicksilver Both Bob Powers acro batic Douglas Aircraft ship can fly inverted nearly well fly upright Bob puts Quicksilver through acro batic routine slope lift over Cape Cod bay Photo David Garwood Left typical Slope Soarer fashion Bob Martin Coyow iou elevator servo mounted fuselage aileron servo tne wing Right Peck-Polymers Genesis flying wing uses mechanical V-tail mixer move devon combined elevator aileron control surfaces Left plan-built Chandeil uses mechanical mixer front wing combines rudder elevator servo output control V-tail Another servo located above wing pivot wing roil control Ailerons used Right theory behind use pivoting wingeron instead ailerons roil control moving large surface just little creates less drag moving small surface lot Bob Martin RC Coyote soars slope lift over roiling Hudson River valley hills up state New York Photo Dave Garwood 7 Sig Ninja soars high over Atlantic Cape Cod National Seashore reservation Lou Garwood stays control shore Photo Dave Garwood Sensoar riding slope lift Hudson River Valley Photo Paula Garwood Lou Garwood launches Sensoar 18-foot hill some inland Slope Soaring Photo David Garwood wings together provide pitch control pivot opposite directions roll Continued page 148 Another photo Lou putting up Sen soar Hobby Horn fioater designed light winds Photo David Garwood April 1992 19 Another photo author flying Kling berg Wing inland lift off abandoned highway overpass Photo Rudy Coletti UU0j U 0 OQ 0- 0 0 0 0 - 0 i 0 P -o- g 0 0 0 l 00 U~ 2 _ 0 -2 0 0 0 0 - 0 a bCD 3 0 - 0 oo ~ o 00 0S0UU 0~U o U0 ~0p 0 0 0 0 0 - o0~ 0 00 U S) .tU0-t 00 0 -t0 0 000i 0 0~ 0 00 o 0 2 -i 0 2 - 0 0 Oo U -0 00 P 00 U ~U00- U 0 oea 0 00 0 00 0 C C p4 0 -4 n SI 0 -5 0 N -4 b b C, C 0 C C C3 C C 000 W xxx 0 C M 0 0CO 0 04400-4-4-4-4 0NC30N~400O0 b C -4 x Mxxx xxx xx x M 0 Mx 0-x Mx 0x x 0 M M . CO MMMMMM 0CCC4W xxCaCxaaaxxxNNNCCC xxxxxxxx -40 C000000-4NNCCC3CCM 0-4-4N00NM0 3-4-4N3 0NNC7CN 0 0C000N0MC0-0 0CCCC~CC4CCC4CC xxxxx00xxx ~xxxxxxxxx0)xx000xxx xxxxx MMM-4-4-4CC4C4-4C-4 0 4-N -4N0-4 00 0 OON0CN0CCO ~N-4-4N N000000N0bCN0NCN~M4 CCMCMb 0M0C0-401 N 4 CCCC N MOO 4 0 N N CoN-4 -4 C -4 -40 x x -4 cc 0 mm 0 000a S 0 C C 0 -4-4-4-40 00000 C N -40 C C40N x0xx 2 NN0 4. C MM C M 4C-4-4 04-4C-CC0NN-4 CM0-C 000-4CCCCC C C C C C C C C C C C MM MM N50Np W xxxxxxxx00000 0 ~4xxxxx 0 C MM0 0 NN&MM~ 0 MM 00 N 00 N 004. C C 0 0000000MO00ON u 0 P0 o W C o 00- 0 x 00 0 C r M -5 CC0 C/ r 00 0o C [ ~IIII 0000000000 000000000 W 000 NNN ~M0 0 -4-4-4 0N 0000 CCMMM--4-- 0CC3MN-4 xxxxxxxxOxxxx- 0 M 0 w 0 0 0 w 5 0 0004.M 0M 0 C 4 0C0OM N N N N N 0CC x x M-4 N N C - 0-4 0 000 C0 4000000 O00N0C-0 00 CO 0 4 0 C 0 0 x0xMx0x C xxx. 0M-M-4M-4M CDxMxMxMx CO0x0xMxM 50 0 N00~ N0CMN0CNN400C4N 0 0 ONOCCCCMMO -4M0CM000M0C0C t0C0 C M 00 MC -4 00 0 0 C C MM MM MM MM 1 C C 0 C~CM 0-4-4CCCC x x 000x x x x 0x x x xxxx 4CC44 0 0 C- C, 4 0 C 0 U w C -n H ni 0 C 0 rn -I m 0 w 0 x C C 0 w 0 m z C N 0 N C 0 C N 0 CJ C 0 N CD Gm 0 C0-G zo 11 c20 0 1 0 0 0 0- 0 CcD U o C UU inC 0 U Co 0 0 1 00-ri C-4 130 I0 Z5 rn 0ir1 i-rn 13 II rn models landing area selected radio step confidently edge hill give model firm toss slightly downward direction Yes downward need airspeed altitude point model may balloon upward suddenly prepared push elevator stick forward prevent stall lift model will soon back above hill dont have enough airspeed solid control will crash After few seconds build up speed turn airplane 900 flying parallel slope model will continue gain altitude flying above out front hill Before model becomes too small see make 1800 turn away hill pass front launch position other end circuit make another 180 turn again away hill Youre now flying basic Slope Soaring pattern Seen above its figure eight always turning wind turn wind keep airspeed up ground speed down turns avoid being blown back over hill Being blown back over hill just about worst thing can happen now because lift decreases rapidly turbulence increases sharply behind hill Ill tell about handle section landing Flying slope lift Once youve launched established flight pattern may want explore limits lift zone Generally lift strongest just above slightly out front hill tapers off go higher decreases go farther out Usable lift can range few feet three times height hill 200 feet out front Finding limit lift zone front hill difficult because tapers off gradually Just fly out until gently begin settle bring model back stronger lift stay aloft Flying behind hill hazardous take pains stay out front gain altitude turning smoothly flying strongest part lift strong lift can get up twice height hill two passes weaker lift may take passes gaining foot two time reach crnising altitude reduce altitude mainly intentionally flying areas weaker lift can also lose height raising nose slightly increasing wings angle attack presents flat surface airstream reducing lift speed maneuver similar landing flare precaution same Dont overdo youll stall What once youve got basics aerobatics course Almost anything can done fuel-powered model can done Slope Soarer have experience Tell Control Horn Go Wont Get Bent Out Shape 0 airplane enthusiast know has same problems control horns flex bend break-what else new Introducing Sullivan 555 toughest control horn ever made Craftecl7with tempered steel instead plastic nickelplated wear resistance Sullivan Control Horn 555 built exacting specifications eliminate flex flutter Better still comes complete ass-filled nylon bushing prevent metal-to-metal contact radio interference sized fit either devises Sullivans New Ball Joint System easy off-axis movement Sullivan 555 Finally control horn 1 PRODUCTS thats made right stu 11 P0 Box 5166 Baltimore MD 21224 Getting Better Ideas Off Ground long-wing thermal gliders will probably try loops first Pilots powered models may prefer rolls first departure straight-and-level Before performing either maneuver gain some altitude begin shallow dive build up speed Inverted passes cool flying whole figure-eight pattern inverted supercool Immelmann turns split-Ss Cuban-eights well within performance envelope fast aileron-and-elevator-controlled Slope ships Landing Remember model airplanes rarely get broken flying its contact ground causes casualties Since its hard fly airplane scanning ground find good spot makes sense select landing area before launch three basic landing locations bottom slope itself top What youll need flat spot few trees bushes fences better big flat soft no obstructions First choice beginners land bottom Its safest spot theres enough flat space although may easiest because model harder see distance Start landing flying out away hill leaving strong lift zone model will gradually lose height altitude decreases lift turbulence reduced youre ready land parallel hill turn wind April 1992 149 its Best New OPS 120 four cycle engine its New high lift cam engine proud precision produced long life dependable service Its high torque makes ideal large scale models OPS VS Parts Are Readily Available Part Cometuim ftO44 9c land model would other Landing slope face requires precise control saves walking bottom slope free brush other obstacles fly lowwell below hilltop area reduced lift model will slow down lose altitude fly close hill let model drift upward rising air As climbs loses airspeed airplane reaches point slightly above desired landing spot youre flying foot two ground put nose down grease er its flat enough big enough top hill offers good visibility familiar landing pattern fuel-power thermal glider pilots also offers hazardous condition Slope flyingthe dreaded rotor area minimal lift intense turbulence typical landing approach top gain plenty altitude fly downwind leg time turn downwind away slope face lose altitude crosswind leg make final approach wind trick maintain control flying through diminishing lift increasing turbulence pilot must keep airspeed up maintain control Im kidding about safety airspeed flying through turbulence Youll landing hot land top bill youll need quick fingers safely compensating advantage landing top dont like approach can go aroundsomething generally cant thermal glider landings can warm up flying high approaches instead landing shoot out over edge back slope lift Practice few passes coming down lower time until get hang make low pass actual landing Like lift zone front hill turbulent zone behind hill limited size rotor intensity tapers off move away edge have truly large flat area top hill can fly over rotor land behind typical thermal glider landing choice landing areas depends much personal preference experience topography Ive seen three types landings made three different pilots flying same hill same day Parting thought warning Youve got airplane selected siteand today have wind Add thing repair kit CyA cyanoacrylate glue five-minute epoxy fiberglass cloth Slope flying hard models field repairs can get back air Dont afraid take beat-up models slope theyre sure receive punishment Good looks dont count first year Slope Soaring lift cooking youll want flying instead watching Slope Soaring definitely participant sport definitely addictive Once try may never again satisfied ordinary RC flying References further reading 1 Dave Thornberg Old Buzzards Soaring Book Pony X Press 5 Monticello Drive Albuquerque NM 87123 Two chapters Slope Soaring great writing style 2 Dave Jones Radio Controlled Gliding Argus Books 1 Golden Square London England WiR 3AB Two excellent chapters Keith Thomas Slope Soaring 3 Dave Hughes Radio Controlled Slope Soaring Chart Hobby Distributors Littlehampton West Sussex UK Continued page 1S2 150 Model Aviation 4 0 e AERIAL MODEL AIRCRAFT PRODUCTS AMAP cutter bowl$17900 213 965-9504I AMAP power supply$4900 Anodized available Add$1000 Three-piece fuse T tailor V tail also sell cut cores available airfoils MH42 MH43 MH62 MH64 7003 RGI5 RGI4A Foam cores $5000 soaFull Money-Back 30$35Cfl antee 5 $45 FLAIR SLOPE 11/SPORT ELECTRIC eComplete S6000 Length43Wd h3Hegh 4O&W5ize1otorRjnded Shp-on Nose Cone Fuselage made EZ Lam Epo Density96 X 2 $2900 Aerospace composite PrixtictsBlue Foam 2 lb24 X Will cut shipping 12 X 48 please specify Bob Rntzlaff 1641 South Elismere Ave Los Angles CA 90019 ASW 17 1/4 Scale 4 M Basic Kit $28500 Thermal Phase Hand Launch 60 E 387 $5000 BflNAJER RIRCRRFT DESIGNS BRB KITS FLY BEST WS 52 1050 sqin Length 54 Weight 9511051b UltimatePRICE $295 KITS INCLUDE Epoxyglass fuse bellypan cowl cock pit lpants applicable Virgin bead foam wing cores wings 1 piece internal formers machine cut birch ACR t ply Illustrated construction manual Clear butyrate canopy Preformed T-6 aluminum landing gear Plug stab kit TO ORDER CALL 215-759-3179 5717 Sullivan Trail Nazareth PA 18064 VISA/MC ACCEPTED definitive work 17 chapters five appendices 4 Stan Eames Sal DeFrancesco Slope Soaring Inland Sites NSP 1991 Northeast Sailplane Products catalog Northeast Sailplane Products 16 Kirby Lane Williston VT 05495 Note British publications listed available US booksellers yes want write about Slope Soaring does help name Dave ng Fun/Mathews Continued page 47 SO WHAT R VA BUILUN Ever notice thats first thing two dedicated modelers ask other meet during winter months Sure intensely dedicated sorts wh fly feet snow temperature below 30 F0 us prefer spend modeling time warm shop cold winter days building things fly weather becomes hospitable also awfully good days spending some time repairing little things last flying seasons models temporary repair can fixed correctly worn-out components replaced radio equipment returned repair station annual servicing course batteries cycled month Im growing about half paranoid over hinges Last flying season seemed hinge year total wipe-out prototype aileron fell off managed land another model rudder hanging pushrod another instance did usual pre-flight pull test have elevator come loose fingers dont think its fair condemn particular brand hinges last seasons troubles Rather think blame lies lots use own poor technique point never preswne hinges tight check ON SAFETY CHECKS brings another thing mind As anyone has flown IMAA event knows group insists safety checks before allowing model fly would least presume fly big models would well above average construction maintenance skills Yet nearly fly-in Ive attended safety inspectors have discovered least model defects would have endangered model spectators other pilots well Some fliers seem offended safety checks seems rather vain Regardless well model built maintained well owner has pre flighted host things might miss Its redundancy thing see times something inspected less likelihood some little detail slipping Thats called quality control isnt Frankly can speculate safety inspections arent part fun fly scene Id sure hate hurt someone hurt someone result some little thing failing because Id grown accustomed looking no longer really saw Wouldnt JUMBO RUBBER POWER month coincidence have 1WLK WIAVLFOAMAIRE 10 SPAN 30-33 LBS 50-75 CC POWER 74 IN WING SPAN 6-7 LBS 45-60 POWER 10 SPAN ,o-42 CC POWER 5-10 LB PAYLOAD OPTIONAL SPREADER4 CH PLY FOAM AND BALSA WOOD CHOOSE 3 UM 4 1 SLOW AND STABLE KIT $26995 SPDKiT$1995 T $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOG T 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERS tpIanecompaaIv SA/MASTERCARD 152 Model Aviation EChu8hcket30Th4eIt 0 N S Y Issa 30AbI8hfl 90 TS CtIW04sI w 6,-~99o SET POSP&H 0,4sOT.WARNING AIRCRAFTIRADIO ID LABEL SETS Identify yaur aircraft per AMA safety rules Sef stc abe s am 0as81088818 $4ooar8n Send eke onee S3ndoIes 950aM $4850 0888810 t9SOPIus 08040 $090 toBaadus Ernepoeo P080 8 NOVa C NY 002 LATNES MILLS METALO BOOKS -PRECIOION TNSTAUMENTS COMPLETE CATALOG $2 00 Ts stems 000011 5beRad c 4I50aoyfald OH 4550$ COMPAC5528562 WS 66 883 sqin 90 108 2U 120 41 Length 60 Weight 95/1051b Also Avail able Extra 230 Version Extra 3XPRICE $240 WS 66 -883 sqin Length 59 90 108 2C 120 4C Weight 95/lOSIb Sukhoi SU-26MPRICE $240 Continued page 154