Conirol Giant Scale Bob Beckman KIORITZ Engine Elsewhere issue first part report engine testing Kirby Crawford have done engines tested Kioritz youll find detailed specs performance data listed report Right now Id like make some general comments about engine Kioritz new breed engines really made impression Giant Scale 1980 engine comes portable indust rial blower rather chain saw has several implications thing engine designed long periods high speed running instead short bursts like chain saw since blower meant backpacked operation low vibration essential Next fact thrust bearing crankshaft conversion items often needed chain saw engine blower engine needs start things obviously big pluses consider application addition original output shaft want use prop rear shaftas chain saw engines Some results design criteria mentioned obvious external appearance engine cooling fins cylinder head deeper finer see chain saw engines obviously designed take advantage large-volume airflow no real flywheel needed engine since original fan prop provides required flywheel action What looks like small flywheel really magnetic rotor ignition magneto Externally Kioritz looks like big model airplane engine Giant Scale power plants date Ignition supplied magneto con trolled mechanical points Points conTHE KIORITZ 38 Model Aviation ENGINE Left above crankcase trimmed Kioritz has model airplane engine look Note absence flywheel neat placement magneto Right above Heres points hide Kioritz Rear location its covered mounting keeps well-protected make sure thatthey adjusted before mounting engine plane Below left Its easy adjust Kioritz carburetor screws engine running Two forward screws Low High-speed mixture controls rear screw idle stop throttle arm Right below Partially disassembled engine shows internal features Three piston rings large ball bearings crankshaft crisp castings denser sealed compartment rear engine keeps well-protected dirt fuel does mean cannot adjusted engine mounted plane carburetor Walbro diaphragmpump models surprised find original carb Most fan engines have carburetors suitable use must replaced Walbros Tillitsons unfortunate resultin caseis carb does have built-in choke since choke function incorporated rather bulky air cleaner carb essentially same used Quadra have heard Dario Brisighella has add-on choke fitting Quadra may fit Kioritz another feature shared Kioritz Quadra Most engines use employ reed valves Kioritz uses directpiston porting Old-time modelers call three port side-portintake RBMcM carb mounted side cylinder opposite exhaust As piston approaches top dead center opens port cylinder wall crankcase vacuum draws fresh charge fuel air As piston moves down closes side port forces fresh charge through Schnuerle-type front rear passes combustion chamber dont Continued page 104 Phil Karafilis fine P-40E Warhawk powered Kawasaki 315 Cu lfl engine Its quite 1/4scalel left Phil taxis out flight last Augusts Hill Country Mammoth Scale Fly-in right its off wild blue part big Kawasaki shows isthe carbcan find Bob reviews Bob Morse plans craft months column FO REALISTIC MODELS PRESENTS NEW t Scale 1947 STINSON VOYAGER Loot spring tail mynel highly detailed cacoum-totmed fins rudder Features Functional Deere Fooctionol Wing Stints Leaf Spring Tail Wheal Specially Designed Motor Monoto Step-by-Stop Instructions Photos April 1981 39 Specially designed motor mount easily accepts Eastoraft Lectra-Scart Sold separately ar512595 Vacuum Formed Ports locledo GrillworhSpecsPrice Scoop Redder Elevator Fins WheelpooteWINGSPAN 101$28500 Loggins Ailerons CollarFLYING WEIGHT UNDER 21 LBSMade uSA /e Gel-Coated Fiberglass Cowl CompletelyENGINE QUADRA SIZE Enbonsos Quadra Enotcrall lectraRABID 4-5 CHANNELSOLD DIRECT ONLY Stoner Pre-Shopod Balsa Lending Edge VISA Pro-Sent Landing Gear Order Call Collect 703 354-5514 Check MO REALISTIC MODELS 4105 Wadsworth Ct Annandale VA 220O3 NTRODUCING TheRJL K61 R/C ENGINE RJL Industries now produces renowned engine formerly manufactured Kraft Systems Inc schnuerle ported 61 cubic inch engine provides easy starting high performance longevity Produced finest materials workmanship quality assurance youll proud have aircraft powered K61 FEATURES INCLUDE Schnuerle Ports Boost Port Double Ball Bearings Forged Alloy Piston & Con Rod Bushed Connecting Rod 0 - ring Sealed Back Cover 16 HP 15500 RPM SUGGESTED RETAIL $13995 Muffler Included Send Free Catalog Today R J L INDUSTRIES P0 Box 5654 Pasadena CA 91107 PRACTICE AEROBA TICS ON PENNIES INSTEAD OF DOLLARS INTRODUCING THE MISER FOR 1981 R/C SPORT FLYER DELUXE Four channel radio mixer rejuired flaperons Stable smooth flying characteristics Responds like controline aerobatic model Youll love MISER ECONOMY - plus PERFORMANCE -plus STYLE-on 15 BLAINES PLANES & RIC Box 109A Rt 1 Fremont IN 46737 COMING COMING COMING COMING 0 PBY-5 Catalina 104 Wing 64 Glass Fuselage Gs PRODUCTS 1010 Gratiot Box 161Z 0 COMING Marysvile MI 48040 COMING last months column regarding Meyer Guttmans LS-3 Basically wing hollowbut layered glass sheet balsa top bottom skins Molds shaped using templates rib section initially plotted five times desired chord size Reduced five times increased accuracy plot left right wings close match humanly possible make might regard overkill its probably Swiss chrono graph costs 20 times timepiece can buy drugstore As attention given matched wings think bird youre flying now trimmed try after few adjustments have satisfied its hands-off performance take safe altitude ease little down stick notice tracks builds up speed Chances wont heading same direction aimed initially say can correct ALL N EW ASTRO STAND 4060 PLANES AND ASTRO PAINT STAND Ultra light durable stands tar holding fuselage wing painting far holding plane up off ground tuning engine pits 1/4 Scale Astra stands also Write call RUSH MODEL PRODUCTS 3242 Went Cad. Road Phoenix AZ 050200 002 003-2115 DEALER INDUIRIES INVITED control deflections fine youre increasing drag deflections concern designers planes like Spartakus overcoming attention symmetry accuracy So youre interested F3B just eager see high-performance Sailplanes circle July 12-17 show up San Francisco eyes will get big kids candy store Dan Pruss RR 2 Box 490 Plainfield IL 60544 RC Giant Scale/Beckman Continued page 39 pretend know enough about engine theory expound advantages disadvantages arrangement old electronics man Im firm believer idea fewer moving parts better off disassembly quality engine really becomes apparent Crisp clean die castings chromed cylinder precise machining double counterweighted crankshaft massive ball bearings front rear forged steel con-rod etc significant internal features visible engine assembled Looking exhaust port turning engine over reveals three rings piston ring pinned overlaps gap adjacent rings What means better compression seal especially engine hot single-ring engines easy start cold real dogs have warmed up differential expansions have degraded piston-to-cylinder seal John Gibbs does several things engine get ready aircraft use First portions forward crankcase casting used mounting blower components removed machining job done neatly easy overlook fact done point-grounding kill wire added along aluminum mounting plate Finally sixbolt prop hub installed standard hub 1-in long length 1 -in 2-in available special order Johns hub has couple interesting features Instead hole center both hub prop washer have -in diameter projection hub helps locate prop isnt really necessary once six bolt holes properly drilled thats prop washer comes projection washer locator can used jig drill bolt holes prop Turn washer around mount prop find center has drilled tapped spinner mounting Kioritz available Gibbs Hobby & Research 6195 HilIfield St NW North Canton OH 44720 Retail price January 1 1981 $18995 John says will no increase unless cost engine itself increases P-40 plans have already reported several plans Bob Morse come Bob very prolific guy months Morse plan little different however Bobs other offerings own designs P-40 designed built Phil Karafilis Bob said airplane just pretty get work up final drawings good collaboration hopefully will such future plans typical of Bobs work clean neat drawings lots detail innovative solutions inevitable problem areas rugged practical structure etc have complaint however plans Bob uses simple construction technique builds C B Associates hinges control surfaces es pecially rudder elevators previous plans has clearly detailed case think someone unfamiliar technique might have some trouble figuring out other hand criticism probably unjustified because beginners air plane first place big model quarter-scale works out 216% full size little over one-fifth-scale yet wing span 8 ft fuselage measures just over 7 ft edge rudderto tip spinner little over 12 sq ft wing area flying weight 35 lbs wing loading works out 46 oz/sq ft Its tremendous flier like original its no Piper Cub plans three sheets 42 wide seven nine feet long plus smaller sheet 104 Model Aviation 1831 Business Center Dr Duane CA 91010 213/359-0016 Eng 15- 25 Max Chord 13 Wing Area 385 sq Symmetrical Wing Span 36 Length 36 kit Only $3995- Plans $500 Shipped prepaid USA No handling charge Order exclusively MINNEAPOLIS HAS SOMETHING NEW IN THE AIR Its Cox Hobbies Weve moved up better facilities give better service think servicing product important its performance AND WELL BACK UP OUR WORDS WITH ACTION PT ACTION will repair radios engines 7 days will ship replacement parts within 10 days Contact Marl Run mark prices availability information 612-835-3000 write Customer Service 4400 West 78th Street Minneapolis Minnesota 55435 Cox division ol Leisure Dynamics Inc Hobbies eapolis Minnesola 55435 See well help fun take off landing gear details theres much clear space anywhere can imagine amount detail included landing gear example rugged functional unit suitable Giant Scale designs Some machine work required build gear nothing very difficult about Another well-detailed feature flap system early design stages Phil figured since real airplane needed flaps model would also Looking projected flying weight over 30 pounds direct servo operation flaps didnt seem too practical pneumatic hydraulic system incorporated littie thought study information plans will allow duplicate Phils very successful installation nice feature plans suggestedjig building fuselage Another indication size bird fact jig made length 2 8 lumber -in ply wood bulkhead supports Phils original built jig think its good invest ment buy eight-foot spruce 2 8 later can cut up building material have seen Phils plane fly can vouch its airworthiness Sad say also witnessed its last flight Phil just completed rolling pass length field Hill Country lost control plane spun several weeks before cause traced cracked crystal transmitter can certainly recommend plans please afirst model Price $2995 plus $200 postage handling Advailable Bob Morse 3352 Prune Ridge Ave Santa Clara CA 95051 Bob Beckman 8248 Holly Grove Court Manassas VA 22110 RC Pylon Racing/Hager Continued page 40 course air racing Unusual unconventional features model must substantiated documentary proof full-sized aircraft ie photographs three-view drawings Motors Motors must reciprocating piston type maximum total swept volume 66 cm3 40 cu Shut-off engine shall equipped positive radio-controlled engine shutoff pilot must able shut off engine radio 0405 1011 1519 2025 3035 4045 40451 5050 6070 195 225 235 245 265 275 300 325 325 OEM BULK INQUIRES INVITED Featuring LONG GLASS FILLED NYLON FOR STRENGTH AND STABILITY Alignment Lines Mounting Interchangeable Kraft Flat bottom nose gear SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 8534 HUDOLESTON CINCINNATI OHIO 45236 AREA CODE 513 791 0744 control ground air within five seconds command irrespective alrcraft attitude competitor will disqualified heat unable land model promptly instruction starter Silencer motors shall fitted silencer Within its length shall ex pansion chamber less 3Omm1-3/16in diameter 100mm 3-29/32-in length hav ing single orifice maximum diameter 10mm 13/32-in Propeller Only fixed-pitch two-blade design propellers either wood composite resin/ continuous-fibre construction may used jection-moulded propellers acceptable Propeller spinner scale-like rounded-nose spinner shall used models proto type aircraft used no spinner rounded-nose spinner least 25cm 1-in diameter shall used Cross-section fuselage shall have mini mum height 175mm 6-13/16-in minimum width 85mm 3-5/16-in Both minimum dimensions must occur same cross-section location fuselage point will have minimum cross-sectional area 100cm2 155 sq excluding fillets contestants will re4uired provide templates prove Fillets considered parts fuselage lifting surfaces Cowls motor motors must enclosed exception silencer cylinder head controls must manipulated during operation motor cylinder head purpose defined top outer 1cm 25/64-in motor excluding ignition plug compression screw Landing gear landing gear shall resemble prototype machine location airframe number wheels used minimum diameter main wheels shall 57mm 2-in minimum width shall 12mm 31/64-in least eter Continued page 108 April 1981 105 NEW GLASS FILLED MOTOR MOUNTS
Edition: Model Aviation - 1981/04
Page Numbers: 38, 39, 104, 105
Edition: Model Aviation - 1981/04
Page Numbers: 38, 39, 104, 105
Conirol Giant Scale Bob Beckman KIORITZ Engine Elsewhere issue first part report engine testing Kirby Crawford have done engines tested Kioritz youll find detailed specs performance data listed report Right now Id like make some general comments about engine Kioritz new breed engines really made impression Giant Scale 1980 engine comes portable indust rial blower rather chain saw has several implications thing engine designed long periods high speed running instead short bursts like chain saw since blower meant backpacked operation low vibration essential Next fact thrust bearing crankshaft conversion items often needed chain saw engine blower engine needs start things obviously big pluses consider application addition original output shaft want use prop rear shaftas chain saw engines Some results design criteria mentioned obvious external appearance engine cooling fins cylinder head deeper finer see chain saw engines obviously designed take advantage large-volume airflow no real flywheel needed engine since original fan prop provides required flywheel action What looks like small flywheel really magnetic rotor ignition magneto Externally Kioritz looks like big model airplane engine Giant Scale power plants date Ignition supplied magneto con trolled mechanical points Points conTHE KIORITZ 38 Model Aviation ENGINE Left above crankcase trimmed Kioritz has model airplane engine look Note absence flywheel neat placement magneto Right above Heres points hide Kioritz Rear location its covered mounting keeps well-protected make sure thatthey adjusted before mounting engine plane Below left Its easy adjust Kioritz carburetor screws engine running Two forward screws Low High-speed mixture controls rear screw idle stop throttle arm Right below Partially disassembled engine shows internal features Three piston rings large ball bearings crankshaft crisp castings denser sealed compartment rear engine keeps well-protected dirt fuel does mean cannot adjusted engine mounted plane carburetor Walbro diaphragmpump models surprised find original carb Most fan engines have carburetors suitable use must replaced Walbros Tillitsons unfortunate resultin caseis carb does have built-in choke since choke function incorporated rather bulky air cleaner carb essentially same used Quadra have heard Dario Brisighella has add-on choke fitting Quadra may fit Kioritz another feature shared Kioritz Quadra Most engines use employ reed valves Kioritz uses directpiston porting Old-time modelers call three port side-portintake RBMcM carb mounted side cylinder opposite exhaust As piston approaches top dead center opens port cylinder wall crankcase vacuum draws fresh charge fuel air As piston moves down closes side port forces fresh charge through Schnuerle-type front rear passes combustion chamber dont Continued page 104 Phil Karafilis fine P-40E Warhawk powered Kawasaki 315 Cu lfl engine Its quite 1/4scalel left Phil taxis out flight last Augusts Hill Country Mammoth Scale Fly-in right its off wild blue part big Kawasaki shows isthe carbcan find Bob reviews Bob Morse plans craft months column FO REALISTIC MODELS PRESENTS NEW t Scale 1947 STINSON VOYAGER Loot spring tail mynel highly detailed cacoum-totmed fins rudder Features Functional Deere Fooctionol Wing Stints Leaf Spring Tail Wheal Specially Designed Motor Monoto Step-by-Stop Instructions Photos April 1981 39 Specially designed motor mount easily accepts Eastoraft Lectra-Scart Sold separately ar512595 Vacuum Formed Ports locledo GrillworhSpecsPrice Scoop Redder Elevator Fins WheelpooteWINGSPAN 101$28500 Loggins Ailerons CollarFLYING WEIGHT UNDER 21 LBSMade uSA /e Gel-Coated Fiberglass Cowl CompletelyENGINE QUADRA SIZE Enbonsos Quadra Enotcrall lectraRABID 4-5 CHANNELSOLD DIRECT ONLY Stoner Pre-Shopod Balsa Lending Edge VISA Pro-Sent Landing Gear Order Call Collect 703 354-5514 Check MO REALISTIC MODELS 4105 Wadsworth Ct Annandale VA 220O3 NTRODUCING TheRJL K61 R/C ENGINE RJL Industries now produces renowned engine formerly manufactured Kraft Systems Inc schnuerle ported 61 cubic inch engine provides easy starting high performance longevity Produced finest materials workmanship quality assurance youll proud have aircraft powered K61 FEATURES INCLUDE Schnuerle Ports Boost Port Double Ball Bearings Forged Alloy Piston & Con Rod Bushed Connecting Rod 0 - ring Sealed Back Cover 16 HP 15500 RPM SUGGESTED RETAIL $13995 Muffler Included Send Free Catalog Today R J L INDUSTRIES P0 Box 5654 Pasadena CA 91107 PRACTICE AEROBA TICS ON PENNIES INSTEAD OF DOLLARS INTRODUCING THE MISER FOR 1981 R/C SPORT FLYER DELUXE Four channel radio mixer rejuired flaperons Stable smooth flying characteristics Responds like controline aerobatic model Youll love MISER ECONOMY - plus PERFORMANCE -plus STYLE-on 15 BLAINES PLANES & RIC Box 109A Rt 1 Fremont IN 46737 COMING COMING COMING COMING 0 PBY-5 Catalina 104 Wing 64 Glass Fuselage Gs PRODUCTS 1010 Gratiot Box 161Z 0 COMING Marysvile MI 48040 COMING last months column regarding Meyer Guttmans LS-3 Basically wing hollowbut layered glass sheet balsa top bottom skins Molds shaped using templates rib section initially plotted five times desired chord size Reduced five times increased accuracy plot left right wings close match humanly possible make might regard overkill its probably Swiss chrono graph costs 20 times timepiece can buy drugstore As attention given matched wings think bird youre flying now trimmed try after few adjustments have satisfied its hands-off performance take safe altitude ease little down stick notice tracks builds up speed Chances wont heading same direction aimed initially say can correct ALL N EW ASTRO STAND 4060 PLANES AND ASTRO PAINT STAND Ultra light durable stands tar holding fuselage wing painting far holding plane up off ground tuning engine pits 1/4 Scale Astra stands also Write call RUSH MODEL PRODUCTS 3242 Went Cad. Road Phoenix AZ 050200 002 003-2115 DEALER INDUIRIES INVITED control deflections fine youre increasing drag deflections concern designers planes like Spartakus overcoming attention symmetry accuracy So youre interested F3B just eager see high-performance Sailplanes circle July 12-17 show up San Francisco eyes will get big kids candy store Dan Pruss RR 2 Box 490 Plainfield IL 60544 RC Giant Scale/Beckman Continued page 39 pretend know enough about engine theory expound advantages disadvantages arrangement old electronics man Im firm believer idea fewer moving parts better off disassembly quality engine really becomes apparent Crisp clean die castings chromed cylinder precise machining double counterweighted crankshaft massive ball bearings front rear forged steel con-rod etc significant internal features visible engine assembled Looking exhaust port turning engine over reveals three rings piston ring pinned overlaps gap adjacent rings What means better compression seal especially engine hot single-ring engines easy start cold real dogs have warmed up differential expansions have degraded piston-to-cylinder seal John Gibbs does several things engine get ready aircraft use First portions forward crankcase casting used mounting blower components removed machining job done neatly easy overlook fact done point-grounding kill wire added along aluminum mounting plate Finally sixbolt prop hub installed standard hub 1-in long length 1 -in 2-in available special order Johns hub has couple interesting features Instead hole center both hub prop washer have -in diameter projection hub helps locate prop isnt really necessary once six bolt holes properly drilled thats prop washer comes projection washer locator can used jig drill bolt holes prop Turn washer around mount prop find center has drilled tapped spinner mounting Kioritz available Gibbs Hobby & Research 6195 HilIfield St NW North Canton OH 44720 Retail price January 1 1981 $18995 John says will no increase unless cost engine itself increases P-40 plans have already reported several plans Bob Morse come Bob very prolific guy months Morse plan little different however Bobs other offerings own designs P-40 designed built Phil Karafilis Bob said airplane just pretty get work up final drawings good collaboration hopefully will such future plans typical of Bobs work clean neat drawings lots detail innovative solutions inevitable problem areas rugged practical structure etc have complaint however plans Bob uses simple construction technique builds C B Associates hinges control surfaces es pecially rudder elevators previous plans has clearly detailed case think someone unfamiliar technique might have some trouble figuring out other hand criticism probably unjustified because beginners air plane first place big model quarter-scale works out 216% full size little over one-fifth-scale yet wing span 8 ft fuselage measures just over 7 ft edge rudderto tip spinner little over 12 sq ft wing area flying weight 35 lbs wing loading works out 46 oz/sq ft Its tremendous flier like original its no Piper Cub plans three sheets 42 wide seven nine feet long plus smaller sheet 104 Model Aviation 1831 Business Center Dr Duane CA 91010 213/359-0016 Eng 15- 25 Max Chord 13 Wing Area 385 sq Symmetrical Wing Span 36 Length 36 kit Only $3995- Plans $500 Shipped prepaid USA No handling charge Order exclusively MINNEAPOLIS HAS SOMETHING NEW IN THE AIR Its Cox Hobbies Weve moved up better facilities give better service think servicing product important its performance AND WELL BACK UP OUR WORDS WITH ACTION PT ACTION will repair radios engines 7 days will ship replacement parts within 10 days Contact Marl Run mark prices availability information 612-835-3000 write Customer Service 4400 West 78th Street Minneapolis Minnesota 55435 Cox division ol Leisure Dynamics Inc Hobbies eapolis Minnesola 55435 See well help fun take off landing gear details theres much clear space anywhere can imagine amount detail included landing gear example rugged functional unit suitable Giant Scale designs Some machine work required build gear nothing very difficult about Another well-detailed feature flap system early design stages Phil figured since real airplane needed flaps model would also Looking projected flying weight over 30 pounds direct servo operation flaps didnt seem too practical pneumatic hydraulic system incorporated littie thought study information plans will allow duplicate Phils very successful installation nice feature plans suggestedjig building fuselage Another indication size bird fact jig made length 2 8 lumber -in ply wood bulkhead supports Phils original built jig think its good invest ment buy eight-foot spruce 2 8 later can cut up building material have seen Phils plane fly can vouch its airworthiness Sad say also witnessed its last flight Phil just completed rolling pass length field Hill Country lost control plane spun several weeks before cause traced cracked crystal transmitter can certainly recommend plans please afirst model Price $2995 plus $200 postage handling Advailable Bob Morse 3352 Prune Ridge Ave Santa Clara CA 95051 Bob Beckman 8248 Holly Grove Court Manassas VA 22110 RC Pylon Racing/Hager Continued page 40 course air racing Unusual unconventional features model must substantiated documentary proof full-sized aircraft ie photographs three-view drawings Motors Motors must reciprocating piston type maximum total swept volume 66 cm3 40 cu Shut-off engine shall equipped positive radio-controlled engine shutoff pilot must able shut off engine radio 0405 1011 1519 2025 3035 4045 40451 5050 6070 195 225 235 245 265 275 300 325 325 OEM BULK INQUIRES INVITED Featuring LONG GLASS FILLED NYLON FOR STRENGTH AND STABILITY Alignment Lines Mounting Interchangeable Kraft Flat bottom nose gear SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 8534 HUDOLESTON CINCINNATI OHIO 45236 AREA CODE 513 791 0744 control ground air within five seconds command irrespective alrcraft attitude competitor will disqualified heat unable land model promptly instruction starter Silencer motors shall fitted silencer Within its length shall ex pansion chamber less 3Omm1-3/16in diameter 100mm 3-29/32-in length hav ing single orifice maximum diameter 10mm 13/32-in Propeller Only fixed-pitch two-blade design propellers either wood composite resin/ continuous-fibre construction may used jection-moulded propellers acceptable Propeller spinner scale-like rounded-nose spinner shall used models proto type aircraft used no spinner rounded-nose spinner least 25cm 1-in diameter shall used Cross-section fuselage shall have mini mum height 175mm 6-13/16-in minimum width 85mm 3-5/16-in Both minimum dimensions must occur same cross-section location fuselage point will have minimum cross-sectional area 100cm2 155 sq excluding fillets contestants will re4uired provide templates prove Fillets considered parts fuselage lifting surfaces Cowls motor motors must enclosed exception silencer cylinder head controls must manipulated during operation motor cylinder head purpose defined top outer 1cm 25/64-in motor excluding ignition plug compression screw Landing gear landing gear shall resemble prototype machine location airframe number wheels used minimum diameter main wheels shall 57mm 2-in minimum width shall 12mm 31/64-in least eter Continued page 108 April 1981 105 NEW GLASS FILLED MOTOR MOUNTS
Edition: Model Aviation - 1981/04
Page Numbers: 38, 39, 104, 105
Conirol Giant Scale Bob Beckman KIORITZ Engine Elsewhere issue first part report engine testing Kirby Crawford have done engines tested Kioritz youll find detailed specs performance data listed report Right now Id like make some general comments about engine Kioritz new breed engines really made impression Giant Scale 1980 engine comes portable indust rial blower rather chain saw has several implications thing engine designed long periods high speed running instead short bursts like chain saw since blower meant backpacked operation low vibration essential Next fact thrust bearing crankshaft conversion items often needed chain saw engine blower engine needs start things obviously big pluses consider application addition original output shaft want use prop rear shaftas chain saw engines Some results design criteria mentioned obvious external appearance engine cooling fins cylinder head deeper finer see chain saw engines obviously designed take advantage large-volume airflow no real flywheel needed engine since original fan prop provides required flywheel action What looks like small flywheel really magnetic rotor ignition magneto Externally Kioritz looks like big model airplane engine Giant Scale power plants date Ignition supplied magneto con trolled mechanical points Points conTHE KIORITZ 38 Model Aviation ENGINE Left above crankcase trimmed Kioritz has model airplane engine look Note absence flywheel neat placement magneto Right above Heres points hide Kioritz Rear location its covered mounting keeps well-protected make sure thatthey adjusted before mounting engine plane Below left Its easy adjust Kioritz carburetor screws engine running Two forward screws Low High-speed mixture controls rear screw idle stop throttle arm Right below Partially disassembled engine shows internal features Three piston rings large ball bearings crankshaft crisp castings denser sealed compartment rear engine keeps well-protected dirt fuel does mean cannot adjusted engine mounted plane carburetor Walbro diaphragmpump models surprised find original carb Most fan engines have carburetors suitable use must replaced Walbros Tillitsons unfortunate resultin caseis carb does have built-in choke since choke function incorporated rather bulky air cleaner carb essentially same used Quadra have heard Dario Brisighella has add-on choke fitting Quadra may fit Kioritz another feature shared Kioritz Quadra Most engines use employ reed valves Kioritz uses directpiston porting Old-time modelers call three port side-portintake RBMcM carb mounted side cylinder opposite exhaust As piston approaches top dead center opens port cylinder wall crankcase vacuum draws fresh charge fuel air As piston moves down closes side port forces fresh charge through Schnuerle-type front rear passes combustion chamber dont Continued page 104 Phil Karafilis fine P-40E Warhawk powered Kawasaki 315 Cu lfl engine Its quite 1/4scalel left Phil taxis out flight last Augusts Hill Country Mammoth Scale Fly-in right its off wild blue part big Kawasaki shows isthe carbcan find Bob reviews Bob Morse plans craft months column FO REALISTIC MODELS PRESENTS NEW t Scale 1947 STINSON VOYAGER Loot spring tail mynel highly detailed cacoum-totmed fins rudder Features Functional Deere Fooctionol Wing Stints Leaf Spring Tail Wheal Specially Designed Motor Monoto Step-by-Stop Instructions Photos April 1981 39 Specially designed motor mount easily accepts Eastoraft Lectra-Scart Sold separately ar512595 Vacuum Formed Ports locledo GrillworhSpecsPrice Scoop Redder Elevator Fins WheelpooteWINGSPAN 101$28500 Loggins Ailerons CollarFLYING WEIGHT UNDER 21 LBSMade uSA /e Gel-Coated Fiberglass Cowl CompletelyENGINE QUADRA SIZE Enbonsos Quadra Enotcrall lectraRABID 4-5 CHANNELSOLD DIRECT ONLY Stoner Pre-Shopod Balsa Lending Edge VISA Pro-Sent Landing Gear Order Call Collect 703 354-5514 Check MO REALISTIC MODELS 4105 Wadsworth Ct Annandale VA 220O3 NTRODUCING TheRJL K61 R/C ENGINE RJL Industries now produces renowned engine formerly manufactured Kraft Systems Inc schnuerle ported 61 cubic inch engine provides easy starting high performance longevity Produced finest materials workmanship quality assurance youll proud have aircraft powered K61 FEATURES INCLUDE Schnuerle Ports Boost Port Double Ball Bearings Forged Alloy Piston & Con Rod Bushed Connecting Rod 0 - ring Sealed Back Cover 16 HP 15500 RPM SUGGESTED RETAIL $13995 Muffler Included Send Free Catalog Today R J L INDUSTRIES P0 Box 5654 Pasadena CA 91107 PRACTICE AEROBA TICS ON PENNIES INSTEAD OF DOLLARS INTRODUCING THE MISER FOR 1981 R/C SPORT FLYER DELUXE Four channel radio mixer rejuired flaperons Stable smooth flying characteristics Responds like controline aerobatic model Youll love MISER ECONOMY - plus PERFORMANCE -plus STYLE-on 15 BLAINES PLANES & RIC Box 109A Rt 1 Fremont IN 46737 COMING COMING COMING COMING 0 PBY-5 Catalina 104 Wing 64 Glass Fuselage Gs PRODUCTS 1010 Gratiot Box 161Z 0 COMING Marysvile MI 48040 COMING last months column regarding Meyer Guttmans LS-3 Basically wing hollowbut layered glass sheet balsa top bottom skins Molds shaped using templates rib section initially plotted five times desired chord size Reduced five times increased accuracy plot left right wings close match humanly possible make might regard overkill its probably Swiss chrono graph costs 20 times timepiece can buy drugstore As attention given matched wings think bird youre flying now trimmed try after few adjustments have satisfied its hands-off performance take safe altitude ease little down stick notice tracks builds up speed Chances wont heading same direction aimed initially say can correct ALL N EW ASTRO STAND 4060 PLANES AND ASTRO PAINT STAND Ultra light durable stands tar holding fuselage wing painting far holding plane up off ground tuning engine pits 1/4 Scale Astra stands also Write call RUSH MODEL PRODUCTS 3242 Went Cad. Road Phoenix AZ 050200 002 003-2115 DEALER INDUIRIES INVITED control deflections fine youre increasing drag deflections concern designers planes like Spartakus overcoming attention symmetry accuracy So youre interested F3B just eager see high-performance Sailplanes circle July 12-17 show up San Francisco eyes will get big kids candy store Dan Pruss RR 2 Box 490 Plainfield IL 60544 RC Giant Scale/Beckman Continued page 39 pretend know enough about engine theory expound advantages disadvantages arrangement old electronics man Im firm believer idea fewer moving parts better off disassembly quality engine really becomes apparent Crisp clean die castings chromed cylinder precise machining double counterweighted crankshaft massive ball bearings front rear forged steel con-rod etc significant internal features visible engine assembled Looking exhaust port turning engine over reveals three rings piston ring pinned overlaps gap adjacent rings What means better compression seal especially engine hot single-ring engines easy start cold real dogs have warmed up differential expansions have degraded piston-to-cylinder seal John Gibbs does several things engine get ready aircraft use First portions forward crankcase casting used mounting blower components removed machining job done neatly easy overlook fact done point-grounding kill wire added along aluminum mounting plate Finally sixbolt prop hub installed standard hub 1-in long length 1 -in 2-in available special order Johns hub has couple interesting features Instead hole center both hub prop washer have -in diameter projection hub helps locate prop isnt really necessary once six bolt holes properly drilled thats prop washer comes projection washer locator can used jig drill bolt holes prop Turn washer around mount prop find center has drilled tapped spinner mounting Kioritz available Gibbs Hobby & Research 6195 HilIfield St NW North Canton OH 44720 Retail price January 1 1981 $18995 John says will no increase unless cost engine itself increases P-40 plans have already reported several plans Bob Morse come Bob very prolific guy months Morse plan little different however Bobs other offerings own designs P-40 designed built Phil Karafilis Bob said airplane just pretty get work up final drawings good collaboration hopefully will such future plans typical of Bobs work clean neat drawings lots detail innovative solutions inevitable problem areas rugged practical structure etc have complaint however plans Bob uses simple construction technique builds C B Associates hinges control surfaces es pecially rudder elevators previous plans has clearly detailed case think someone unfamiliar technique might have some trouble figuring out other hand criticism probably unjustified because beginners air plane first place big model quarter-scale works out 216% full size little over one-fifth-scale yet wing span 8 ft fuselage measures just over 7 ft edge rudderto tip spinner little over 12 sq ft wing area flying weight 35 lbs wing loading works out 46 oz/sq ft Its tremendous flier like original its no Piper Cub plans three sheets 42 wide seven nine feet long plus smaller sheet 104 Model Aviation 1831 Business Center Dr Duane CA 91010 213/359-0016 Eng 15- 25 Max Chord 13 Wing Area 385 sq Symmetrical Wing Span 36 Length 36 kit Only $3995- Plans $500 Shipped prepaid USA No handling charge Order exclusively MINNEAPOLIS HAS SOMETHING NEW IN THE AIR Its Cox Hobbies Weve moved up better facilities give better service think servicing product important its performance AND WELL BACK UP OUR WORDS WITH ACTION PT ACTION will repair radios engines 7 days will ship replacement parts within 10 days Contact Marl Run mark prices availability information 612-835-3000 write Customer Service 4400 West 78th Street Minneapolis Minnesota 55435 Cox division ol Leisure Dynamics Inc Hobbies eapolis Minnesola 55435 See well help fun take off landing gear details theres much clear space anywhere can imagine amount detail included landing gear example rugged functional unit suitable Giant Scale designs Some machine work required build gear nothing very difficult about Another well-detailed feature flap system early design stages Phil figured since real airplane needed flaps model would also Looking projected flying weight over 30 pounds direct servo operation flaps didnt seem too practical pneumatic hydraulic system incorporated littie thought study information plans will allow duplicate Phils very successful installation nice feature plans suggestedjig building fuselage Another indication size bird fact jig made length 2 8 lumber -in ply wood bulkhead supports Phils original built jig think its good invest ment buy eight-foot spruce 2 8 later can cut up building material have seen Phils plane fly can vouch its airworthiness Sad say also witnessed its last flight Phil just completed rolling pass length field Hill Country lost control plane spun several weeks before cause traced cracked crystal transmitter can certainly recommend plans please afirst model Price $2995 plus $200 postage handling Advailable Bob Morse 3352 Prune Ridge Ave Santa Clara CA 95051 Bob Beckman 8248 Holly Grove Court Manassas VA 22110 RC Pylon Racing/Hager Continued page 40 course air racing Unusual unconventional features model must substantiated documentary proof full-sized aircraft ie photographs three-view drawings Motors Motors must reciprocating piston type maximum total swept volume 66 cm3 40 cu Shut-off engine shall equipped positive radio-controlled engine shutoff pilot must able shut off engine radio 0405 1011 1519 2025 3035 4045 40451 5050 6070 195 225 235 245 265 275 300 325 325 OEM BULK INQUIRES INVITED Featuring LONG GLASS FILLED NYLON FOR STRENGTH AND STABILITY Alignment Lines Mounting Interchangeable Kraft Flat bottom nose gear SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 8534 HUDOLESTON CINCINNATI OHIO 45236 AREA CODE 513 791 0744 control ground air within five seconds command irrespective alrcraft attitude competitor will disqualified heat unable land model promptly instruction starter Silencer motors shall fitted silencer Within its length shall ex pansion chamber less 3Omm1-3/16in diameter 100mm 3-29/32-in length hav ing single orifice maximum diameter 10mm 13/32-in Propeller Only fixed-pitch two-blade design propellers either wood composite resin/ continuous-fibre construction may used jection-moulded propellers acceptable Propeller spinner scale-like rounded-nose spinner shall used models proto type aircraft used no spinner rounded-nose spinner least 25cm 1-in diameter shall used Cross-section fuselage shall have mini mum height 175mm 6-13/16-in minimum width 85mm 3-5/16-in Both minimum dimensions must occur same cross-section location fuselage point will have minimum cross-sectional area 100cm2 155 sq excluding fillets contestants will re4uired provide templates prove Fillets considered parts fuselage lifting surfaces Cowls motor motors must enclosed exception silencer cylinder head controls must manipulated during operation motor cylinder head purpose defined top outer 1cm 25/64-in motor excluding ignition plug compression screw Landing gear landing gear shall resemble prototype machine location airframe number wheels used minimum diameter main wheels shall 57mm 2-in minimum width shall 12mm 31/64-in least eter Continued page 108 April 1981 105 NEW GLASS FILLED MOTOR MOUNTS
Edition: Model Aviation - 1981/04
Page Numbers: 38, 39, 104, 105
Conirol Giant Scale Bob Beckman KIORITZ Engine Elsewhere issue first part report engine testing Kirby Crawford have done engines tested Kioritz youll find detailed specs performance data listed report Right now Id like make some general comments about engine Kioritz new breed engines really made impression Giant Scale 1980 engine comes portable indust rial blower rather chain saw has several implications thing engine designed long periods high speed running instead short bursts like chain saw since blower meant backpacked operation low vibration essential Next fact thrust bearing crankshaft conversion items often needed chain saw engine blower engine needs start things obviously big pluses consider application addition original output shaft want use prop rear shaftas chain saw engines Some results design criteria mentioned obvious external appearance engine cooling fins cylinder head deeper finer see chain saw engines obviously designed take advantage large-volume airflow no real flywheel needed engine since original fan prop provides required flywheel action What looks like small flywheel really magnetic rotor ignition magneto Externally Kioritz looks like big model airplane engine Giant Scale power plants date Ignition supplied magneto con trolled mechanical points Points conTHE KIORITZ 38 Model Aviation ENGINE Left above crankcase trimmed Kioritz has model airplane engine look Note absence flywheel neat placement magneto Right above Heres points hide Kioritz Rear location its covered mounting keeps well-protected make sure thatthey adjusted before mounting engine plane Below left Its easy adjust Kioritz carburetor screws engine running Two forward screws Low High-speed mixture controls rear screw idle stop throttle arm Right below Partially disassembled engine shows internal features Three piston rings large ball bearings crankshaft crisp castings denser sealed compartment rear engine keeps well-protected dirt fuel does mean cannot adjusted engine mounted plane carburetor Walbro diaphragmpump models surprised find original carb Most fan engines have carburetors suitable use must replaced Walbros Tillitsons unfortunate resultin caseis carb does have built-in choke since choke function incorporated rather bulky air cleaner carb essentially same used Quadra have heard Dario Brisighella has add-on choke fitting Quadra may fit Kioritz another feature shared Kioritz Quadra Most engines use employ reed valves Kioritz uses directpiston porting Old-time modelers call three port side-portintake RBMcM carb mounted side cylinder opposite exhaust As piston approaches top dead center opens port cylinder wall crankcase vacuum draws fresh charge fuel air As piston moves down closes side port forces fresh charge through Schnuerle-type front rear passes combustion chamber dont Continued page 104 Phil Karafilis fine P-40E Warhawk powered Kawasaki 315 Cu lfl engine Its quite 1/4scalel left Phil taxis out flight last Augusts Hill Country Mammoth Scale Fly-in right its off wild blue part big Kawasaki shows isthe carbcan find Bob reviews Bob Morse plans craft months column FO REALISTIC MODELS PRESENTS NEW t Scale 1947 STINSON VOYAGER Loot spring tail mynel highly detailed cacoum-totmed fins rudder Features Functional Deere Fooctionol Wing Stints Leaf Spring Tail Wheal Specially Designed Motor Monoto Step-by-Stop Instructions Photos April 1981 39 Specially designed motor mount easily accepts Eastoraft Lectra-Scart Sold separately ar512595 Vacuum Formed Ports locledo GrillworhSpecsPrice Scoop Redder Elevator Fins WheelpooteWINGSPAN 101$28500 Loggins Ailerons CollarFLYING WEIGHT UNDER 21 LBSMade uSA /e Gel-Coated Fiberglass Cowl CompletelyENGINE QUADRA SIZE Enbonsos Quadra Enotcrall lectraRABID 4-5 CHANNELSOLD DIRECT ONLY Stoner Pre-Shopod Balsa Lending Edge VISA Pro-Sent Landing Gear Order Call Collect 703 354-5514 Check MO REALISTIC MODELS 4105 Wadsworth Ct Annandale VA 220O3 NTRODUCING TheRJL K61 R/C ENGINE RJL Industries now produces renowned engine formerly manufactured Kraft Systems Inc schnuerle ported 61 cubic inch engine provides easy starting high performance longevity Produced finest materials workmanship quality assurance youll proud have aircraft powered K61 FEATURES INCLUDE Schnuerle Ports Boost Port Double Ball Bearings Forged Alloy Piston & Con Rod Bushed Connecting Rod 0 - ring Sealed Back Cover 16 HP 15500 RPM SUGGESTED RETAIL $13995 Muffler Included Send Free Catalog Today R J L INDUSTRIES P0 Box 5654 Pasadena CA 91107 PRACTICE AEROBA TICS ON PENNIES INSTEAD OF DOLLARS INTRODUCING THE MISER FOR 1981 R/C SPORT FLYER DELUXE Four channel radio mixer rejuired flaperons Stable smooth flying characteristics Responds like controline aerobatic model Youll love MISER ECONOMY - plus PERFORMANCE -plus STYLE-on 15 BLAINES PLANES & RIC Box 109A Rt 1 Fremont IN 46737 COMING COMING COMING COMING 0 PBY-5 Catalina 104 Wing 64 Glass Fuselage Gs PRODUCTS 1010 Gratiot Box 161Z 0 COMING Marysvile MI 48040 COMING last months column regarding Meyer Guttmans LS-3 Basically wing hollowbut layered glass sheet balsa top bottom skins Molds shaped using templates rib section initially plotted five times desired chord size Reduced five times increased accuracy plot left right wings close match humanly possible make might regard overkill its probably Swiss chrono graph costs 20 times timepiece can buy drugstore As attention given matched wings think bird youre flying now trimmed try after few adjustments have satisfied its hands-off performance take safe altitude ease little down stick notice tracks builds up speed Chances wont heading same direction aimed initially say can correct ALL N EW ASTRO STAND 4060 PLANES AND ASTRO PAINT STAND Ultra light durable stands tar holding fuselage wing painting far holding plane up off ground tuning engine pits 1/4 Scale Astra stands also Write call RUSH MODEL PRODUCTS 3242 Went Cad. Road Phoenix AZ 050200 002 003-2115 DEALER INDUIRIES INVITED control deflections fine youre increasing drag deflections concern designers planes like Spartakus overcoming attention symmetry accuracy So youre interested F3B just eager see high-performance Sailplanes circle July 12-17 show up San Francisco eyes will get big kids candy store Dan Pruss RR 2 Box 490 Plainfield IL 60544 RC Giant Scale/Beckman Continued page 39 pretend know enough about engine theory expound advantages disadvantages arrangement old electronics man Im firm believer idea fewer moving parts better off disassembly quality engine really becomes apparent Crisp clean die castings chromed cylinder precise machining double counterweighted crankshaft massive ball bearings front rear forged steel con-rod etc significant internal features visible engine assembled Looking exhaust port turning engine over reveals three rings piston ring pinned overlaps gap adjacent rings What means better compression seal especially engine hot single-ring engines easy start cold real dogs have warmed up differential expansions have degraded piston-to-cylinder seal John Gibbs does several things engine get ready aircraft use First portions forward crankcase casting used mounting blower components removed machining job done neatly easy overlook fact done point-grounding kill wire added along aluminum mounting plate Finally sixbolt prop hub installed standard hub 1-in long length 1 -in 2-in available special order Johns hub has couple interesting features Instead hole center both hub prop washer have -in diameter projection hub helps locate prop isnt really necessary once six bolt holes properly drilled thats prop washer comes projection washer locator can used jig drill bolt holes prop Turn washer around mount prop find center has drilled tapped spinner mounting Kioritz available Gibbs Hobby & Research 6195 HilIfield St NW North Canton OH 44720 Retail price January 1 1981 $18995 John says will no increase unless cost engine itself increases P-40 plans have already reported several plans Bob Morse come Bob very prolific guy months Morse plan little different however Bobs other offerings own designs P-40 designed built Phil Karafilis Bob said airplane just pretty get work up final drawings good collaboration hopefully will such future plans typical of Bobs work clean neat drawings lots detail innovative solutions inevitable problem areas rugged practical structure etc have complaint however plans Bob uses simple construction technique builds C B Associates hinges control surfaces es pecially rudder elevators previous plans has clearly detailed case think someone unfamiliar technique might have some trouble figuring out other hand criticism probably unjustified because beginners air plane first place big model quarter-scale works out 216% full size little over one-fifth-scale yet wing span 8 ft fuselage measures just over 7 ft edge rudderto tip spinner little over 12 sq ft wing area flying weight 35 lbs wing loading works out 46 oz/sq ft Its tremendous flier like original its no Piper Cub plans three sheets 42 wide seven nine feet long plus smaller sheet 104 Model Aviation 1831 Business Center Dr Duane CA 91010 213/359-0016 Eng 15- 25 Max Chord 13 Wing Area 385 sq Symmetrical Wing Span 36 Length 36 kit Only $3995- Plans $500 Shipped prepaid USA No handling charge Order exclusively MINNEAPOLIS HAS SOMETHING NEW IN THE AIR Its Cox Hobbies Weve moved up better facilities give better service think servicing product important its performance AND WELL BACK UP OUR WORDS WITH ACTION PT ACTION will repair radios engines 7 days will ship replacement parts within 10 days Contact Marl Run mark prices availability information 612-835-3000 write Customer Service 4400 West 78th Street Minneapolis Minnesota 55435 Cox division ol Leisure Dynamics Inc Hobbies eapolis Minnesola 55435 See well help fun take off landing gear details theres much clear space anywhere can imagine amount detail included landing gear example rugged functional unit suitable Giant Scale designs Some machine work required build gear nothing very difficult about Another well-detailed feature flap system early design stages Phil figured since real airplane needed flaps model would also Looking projected flying weight over 30 pounds direct servo operation flaps didnt seem too practical pneumatic hydraulic system incorporated littie thought study information plans will allow duplicate Phils very successful installation nice feature plans suggestedjig building fuselage Another indication size bird fact jig made length 2 8 lumber -in ply wood bulkhead supports Phils original built jig think its good invest ment buy eight-foot spruce 2 8 later can cut up building material have seen Phils plane fly can vouch its airworthiness Sad say also witnessed its last flight Phil just completed rolling pass length field Hill Country lost control plane spun several weeks before cause traced cracked crystal transmitter can certainly recommend plans please afirst model Price $2995 plus $200 postage handling Advailable Bob Morse 3352 Prune Ridge Ave Santa Clara CA 95051 Bob Beckman 8248 Holly Grove Court Manassas VA 22110 RC Pylon Racing/Hager Continued page 40 course air racing Unusual unconventional features model must substantiated documentary proof full-sized aircraft ie photographs three-view drawings Motors Motors must reciprocating piston type maximum total swept volume 66 cm3 40 cu Shut-off engine shall equipped positive radio-controlled engine shutoff pilot must able shut off engine radio 0405 1011 1519 2025 3035 4045 40451 5050 6070 195 225 235 245 265 275 300 325 325 OEM BULK INQUIRES INVITED Featuring LONG GLASS FILLED NYLON FOR STRENGTH AND STABILITY Alignment Lines Mounting Interchangeable Kraft Flat bottom nose gear SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 8534 HUDOLESTON CINCINNATI OHIO 45236 AREA CODE 513 791 0744 control ground air within five seconds command irrespective alrcraft attitude competitor will disqualified heat unable land model promptly instruction starter Silencer motors shall fitted silencer Within its length shall ex pansion chamber less 3Omm1-3/16in diameter 100mm 3-29/32-in length hav ing single orifice maximum diameter 10mm 13/32-in Propeller Only fixed-pitch two-blade design propellers either wood composite resin/ continuous-fibre construction may used jection-moulded propellers acceptable Propeller spinner scale-like rounded-nose spinner shall used models proto type aircraft used no spinner rounded-nose spinner least 25cm 1-in diameter shall used Cross-section fuselage shall have mini mum height 175mm 6-13/16-in minimum width 85mm 3-5/16-in Both minimum dimensions must occur same cross-section location fuselage point will have minimum cross-sectional area 100cm2 155 sq excluding fillets contestants will re4uired provide templates prove Fillets considered parts fuselage lifting surfaces Cowls motor motors must enclosed exception silencer cylinder head controls must manipulated during operation motor cylinder head purpose defined top outer 1cm 25/64-in motor excluding ignition plug compression screw Landing gear landing gear shall resemble prototype machine location airframe number wheels used minimum diameter main wheels shall 57mm 2-in minimum width shall 12mm 31/64-in least eter Continued page 108 April 1981 105 NEW GLASS FILLED MOTOR MOUNTS
