Bob Underwood USk~ WHAT GOES AROUND comes around least better powered trainer isnt going fly Im talking about propellerthat twisty object spins away causing model taste air flight choice propeller prop trainer critical sophisticated Pylon Pattern Scale etc model Maximum thrust speed primary goal looking something will haul model skyward allow cruise nicely let engine run smoothly stand up abuse bounced landings recent years significant progress has made producing efficient quieter props materials have gone widespread use wood composites various types Tip shapes airfoils different ideas about loading engine part revolution Theres also move using low end engine size range using upper end philosophy can reduce throttle setting rather trying squeeze extra 100 rpm has come play Which prop use During newcomer years prop recommendation chart accompanied engine standard usually saw 10 x 6 40 11 x 7 60 smaller sizes 15 19 etc engines huffed puffed way through 10000-12000 rpm unfettered mufflers fitted butterfly-style exhaust stack cover helped provide back pressure could get reliable hopefully idle Now engines propped lower rpm sound level brought down mufflers tuned pipes efficient props selecting prop consider following factors 1 What does engine manufacturer recommend Use starting point Since probably wont need strive maximum performance shouldnt too much problem reading engine reviews published some model magazines can obtain further information reviews generally cover wide range sizes pitches fit engines comfort zone will suggested Engines tuned timed work efficiently particular rpm range two-stroke engines often happier singing along higher rpm fourstrokes latter restricted lower speeds because valves tend float higher rpms Good question Difficult answer Wood doesnt tend last long ding landing scrape nick wood prop history However wood inexpensive compared composites possibility inconsistency stiffness hardness wooden propeller because nature wood itself hidden knot vein softer wood etc contribute create unknown composite generally will consistent Whether its wood composite check prop frequently cracks fatigue Grasp blades twist bend detect problems Wooden props may develop cracks hub along length blade composites tend flex create stress hub have spinner model fatigue points may hidden inside Its good idea check prop tightness start flying session Wood props tend compress over time loosen Props designed help models fly fly themselves 3 Balance props keep balanced Engines tend vibrate enough putting out-of-balance stick front turning 10000 rpm holding model running way out balance may stimulating imagine what 84 Model Aviation ould use wood composites Easy hand starts Slower smoother idle & mid-range Ughtweight- 3 oz less battery pack Better top end power Easy install achining wiring required Can Installed minutes hand tools electronic parts installed small ruggea anc ea aiui - x 1 5/8 x 1 3/16 No moving parts wear out get out adjustment new lightweight machined aluminum flywheel Timing adjustable few degrees fine tune engineIWodefsLZ have complete ignitien systems fer MeCulloch RyobiBstSeRing weed eater engines accessories pails available n5ofl ignition engine Custom installation available doing components solder joints radio system 4 Diameter pitch diameter hard figure Its total length prop Pitch other hand easy determine its twist angle blades set see number such used early column 10 x 6 first number refers diameter inches second pitch twist blade Both blades will should carry same pitch Some props will carry washed out pitch such 12 x 6-10 means pitch blades varies hub tip average newcomer type prop necessity may worth try youre having problem getting right rpmbite combination pull model 5 Other host differences exist between brands props within same brand instance youll find indicating fourstroke engines some feature scimitarshaped blades Other will feature wide blades still others very narrow wide blades designed creating greater thrust lower rpm narrow blades tend speed props thrust created much higher rpm often suggested APC increase either diameter pitch number optimum results 10 x 6 would suggest using 11 x6orlOx7 Years ago plastic nylon props carried specific instructions steps followed before used essential set prevent fatigue especially hub area newer composite materials generally require much preparation construction usually resins fibers impregnated resin Some use bits fiber others use continuous strands running length prop 86 Model Avjation entire years worth Model Aviation issues work get out aeromodeling experience 440 331-1881 440 331-2032 An entire years worth 2200 pages construction technical how-to articles Also AMA News regular columns covering Radio Control Control Line Free Flight modeling Browse issue quickly search entire year specific C D Libraries has reproduced page has assembled comprehensive database entire years worth issues Supported queries Article title author subject keyword keyname issue advertisement Other features Embedded text strings supported throughout full-color SVGA image display easy use Produced distributed CD Libraries Inc under license Academy Mini-Sander$335 Garnet Sandpaper 2 trite$235 Mined Garnet & Waterpreat Sandpaper$235 Waterprant Sandpaper 3 gritn $245 part building model Applied Design Corporation PO Box 3384 Torrance CA 90510 310-375-4120 Add 20% far chipping Send SASt ten Catalag Fax 3103751590 12 PR 12LS 145 P HAVE YOUR HOBBY DEALER CALL ON THE ORDER LINE UAV Inc 800-294-9506 OLD TIME RUBBER PLANS AND LASER CUT PARTS MMY 048 04400 Paw POnt ~2IEAaENUEfIS0 IS704$ 804 FIY1NO ACES MOTH 34 SW Conwar48I Rate P1nSOOOPtnSll 00 flL Lanzo Classic 21$ Sq keIeld Pint $700 P102000 JIMMIE ALLEN BA CABIN P1n 0600 P8050000 AL CASASOS CHAMPIONSHIP STICK ~-0 LANZO PUSS MOTh Plon $700 PtA 52000 Art Noraks Wander 3-40 MAN FAC ST 000k P404487W p018 51855 PLEASE AD 5404 FOR POSTAGE introducing new line old time plane Laser cut parts Mans CAD drawn Jim OReilly Jim has over 60 old lime rubber gas plans laser cut kits toohe designed fly Call SAM list AJI parts laser cut own 50 watt laser Laser engraved contest plaques available BOB HOLMAN PLANS P 0 BOX 741 SAN BERNARDINO CA 92402 909 885 3959 FAX 889 9307 John Eatons 25cc 15 CI Engine 10000 baIl & roller bear 1190 r 1 Electronrc magnero Prop hob & mover ocosee Hood otari / wr 4 ho Current Price $15000 S&H$1300 Avalahie Now Prop out & movot 0100 oold oeporalely Custom Uok & Ropabs done mn engines Conversiut ipoted upon request GIANT SCALE TR 260 CLOSE OUT CIOfl Dill PRICESI KIT 817900 8111825 W 848000 9111820 Md-wing aerohatic deolgo tar 2104 Ci ABS cowl notch ecoer & whee pants ARE cooered Utacote Kit weghr 15-18 us 86 wingspan ARE weight 16-19 160 92 w ogopan * * ATTEIllE SUPER DGER OWNERSI * * E nallyAoa able amach nedbarorocrodwirhloll rollerbearings Sopor T ger eng non Super heavy coty rhin improoe perlormance glow a moot br gao conoero 2500&3000-S40D0S4OOS&H 88 Model Aviation 4Blowout Sale Quantities Limited Stock Hand Sale Ends August 31 1998 0a 00 42 7 lIt w -t Wnt,h4a U U H B U U U K U U U 1mm 05 nFR 40 Fiberglass Minimum purchase 10 yards Ch148 05 oz 075 oz 15 oz 2 oz 23 oz 23 oz 3 oz 32 oz Satin 4 ox 6 ox 8Hs 6 oz 6 oz 6 oz GO1O4S G0106S GOO8OS G2112S G1610S G2113S G2116S GOO2OS G2522S G16aOS G3733S G7533S G7628S 38$200 38$125 38$125 38$200 38$175 55$200 50$200 38$325 50$325 38$400 38$400 50$500 40$175 Fiberglass Tape 015 thick 2in x 36 yards $2000 Rohacell 51 12 x 24 11 x 24 $900 $600 Orders under $50 add $5 handling addition slopping VISA Mc AmEx Discover accepted No other dGEosnlo may used sale Order Toll Free 1-800-335-1276 Visit r Web Site mew cstsalescom certain read manufacturer instructions follow carefully case composites thin edge trailing edge blade may very sharp Dulling edge wise dont want lawnmower blade-type surface near fingers especially four-stroke engines since have propensity backfire under certain conditions hand-cranking can dangerous Actually should always use protective device start engine may range electric starter through chicken sticks heavy glove large proportion accidents occur because spinning propeller would assume doesnt take rocket scientist figure out getting some part anatomy caught something turning 10000 rpm will hurt dayin/day-out someone does just some safety steps can take Paint prop tips bright color can see arc Never put body prop arc Its common see people lean over model faces just inches away prop Adjust needle valve behind prop arc Dont reach around Engine manufacturers have recognized new engines have needle valve angled away prop allow place remote position Plan will put starter box cord glow plug wires used transmitter facilitate keeping items out prop Make placement ritual Watch loose clothing such jackets etc use transmitter lanyard strap make certain tucked away will just naturally swing prop youre careful Have someone hold model Firmly Work out signals ahead time Composite Structure Technology PO Box 822 Dept JT Tehachapi CA 93581-0822 Technical Support 805822-4162 Fax 805-822-4121 Stans Fiber Tech 2575 Jackson Riverside CA 92503 352-4758 E holder will know intent Nothing disconcerting have helper carry model runway surprised run up engine clear out before takeoff wasnt expected Throw away damaged prop Break others wont tempted retrieve trash can Dont try glue splice anything else Ive heard individuals state after grinding bit blade tips takeoff Oh well its probably still balanced since ground off both tips Dont believe Besides may see split runs lengthwise both blades Give yourself plenty runway-to-prop tip clearance minimum inch advised Remember model tricycle landing gear will lose clearance hard landing Through years Ive watched modelers lavish attention cleanliness model engine toolbox never give prop glance thats probably important pieces model Without propa good oneyoure going need really good throwing arm tall building take up sailplanes second thought latter probably wouldnt work because didnt take care engine probably wouldnt take care launching mechanism sailplane Last month said Id talk about props field etiquette guess lied Too prop revolutions enough thrust Next month Ill discuss field behavior assorted sundry Hows being redundantly repetitive ON SOME AlAS Sport-Airs Train-Airs S MICRO DIGITAL MOTOR CONTROLLERS SAFE NO GLITCH POVER ON SOFT LOB TORQUE START UP HIGH RATE SMALL SIZE LIGHT VEIGHT SELF ALIGNS TO YOUR TRANSMITTER NO ADJUSTMENT NECESSARY MICRO DEMON 100 2OAMP 1-14CELL 12x085x039 13g/46oz wires 4700Hz includes setup LED 995 *NWJ* MICRO DEMON 102 *NJIJ* 20AMP 6-8CELL BEC BRAKE 21 gI75oz wires 4700Hz 18x0S5xO39 includes setup LED$5995 SPEED DEMON 200 35AMP 1-16cELL 16 Xi 0 xO42 26g192oz wires 2400Hz$8295 VIPER MODEL PRODUCTS 3475 Edison Way Suite Nenlo Park CA 94025 1-800592-8473 VISA MASTERCARD D & J ELECTRONICS Marigold St NW Hartville OH 44632 1236330-877-1445 J ice & Repairs Most Radio Control Systems Utilizing Calibrated Test Equipment & Spectrum Analyzers Endorsd AMAi RCMA Sticker Station #105 Futaba Airtronics JR Ace HiTec Tower Cirrus World Engines & WE USE GENUINE FACTORY REPLACEMENT PARTS Complete 1991 Narrow Banding & Upgrades RCD / HITEC R/C DEALER FCC Licensed Speed Control Repairs Quality Service Fast Turn Around Shipping & Insurance Extra UPS U S Mail CODs Visit home pane http//wwwdnjelectronicscom Email davId@dnlelectronicscom iayne@dnlelectronics AMA #256123ARRLWB8YSQ s-- bbI ~NU WN DWJUDWDNV ox 208 Methuen MA 01844 phone 978 686-0319 Call write full line catalog
Edition: Model Aviation - 1998/09
Page Numbers: 84, 86, 88, 91
Edition: Model Aviation - 1998/09
Page Numbers: 84, 86, 88, 91
Bob Underwood USk~ WHAT GOES AROUND comes around least better powered trainer isnt going fly Im talking about propellerthat twisty object spins away causing model taste air flight choice propeller prop trainer critical sophisticated Pylon Pattern Scale etc model Maximum thrust speed primary goal looking something will haul model skyward allow cruise nicely let engine run smoothly stand up abuse bounced landings recent years significant progress has made producing efficient quieter props materials have gone widespread use wood composites various types Tip shapes airfoils different ideas about loading engine part revolution Theres also move using low end engine size range using upper end philosophy can reduce throttle setting rather trying squeeze extra 100 rpm has come play Which prop use During newcomer years prop recommendation chart accompanied engine standard usually saw 10 x 6 40 11 x 7 60 smaller sizes 15 19 etc engines huffed puffed way through 10000-12000 rpm unfettered mufflers fitted butterfly-style exhaust stack cover helped provide back pressure could get reliable hopefully idle Now engines propped lower rpm sound level brought down mufflers tuned pipes efficient props selecting prop consider following factors 1 What does engine manufacturer recommend Use starting point Since probably wont need strive maximum performance shouldnt too much problem reading engine reviews published some model magazines can obtain further information reviews generally cover wide range sizes pitches fit engines comfort zone will suggested Engines tuned timed work efficiently particular rpm range two-stroke engines often happier singing along higher rpm fourstrokes latter restricted lower speeds because valves tend float higher rpms Good question Difficult answer Wood doesnt tend last long ding landing scrape nick wood prop history However wood inexpensive compared composites possibility inconsistency stiffness hardness wooden propeller because nature wood itself hidden knot vein softer wood etc contribute create unknown composite generally will consistent Whether its wood composite check prop frequently cracks fatigue Grasp blades twist bend detect problems Wooden props may develop cracks hub along length blade composites tend flex create stress hub have spinner model fatigue points may hidden inside Its good idea check prop tightness start flying session Wood props tend compress over time loosen Props designed help models fly fly themselves 3 Balance props keep balanced Engines tend vibrate enough putting out-of-balance stick front turning 10000 rpm holding model running way out balance may stimulating imagine what 84 Model Aviation ould use wood composites Easy hand starts Slower smoother idle & mid-range Ughtweight- 3 oz less battery pack Better top end power Easy install achining wiring required Can Installed minutes hand tools electronic parts installed small ruggea anc ea aiui - x 1 5/8 x 1 3/16 No moving parts wear out get out adjustment new lightweight machined aluminum flywheel Timing adjustable few degrees fine tune engineIWodefsLZ have complete ignitien systems fer MeCulloch RyobiBstSeRing weed eater engines accessories pails available n5ofl ignition engine Custom installation available doing components solder joints radio system 4 Diameter pitch diameter hard figure Its total length prop Pitch other hand easy determine its twist angle blades set see number such used early column 10 x 6 first number refers diameter inches second pitch twist blade Both blades will should carry same pitch Some props will carry washed out pitch such 12 x 6-10 means pitch blades varies hub tip average newcomer type prop necessity may worth try youre having problem getting right rpmbite combination pull model 5 Other host differences exist between brands props within same brand instance youll find indicating fourstroke engines some feature scimitarshaped blades Other will feature wide blades still others very narrow wide blades designed creating greater thrust lower rpm narrow blades tend speed props thrust created much higher rpm often suggested APC increase either diameter pitch number optimum results 10 x 6 would suggest using 11 x6orlOx7 Years ago plastic nylon props carried specific instructions steps followed before used essential set prevent fatigue especially hub area newer composite materials generally require much preparation construction usually resins fibers impregnated resin Some use bits fiber others use continuous strands running length prop 86 Model Avjation entire years worth Model Aviation issues work get out aeromodeling experience 440 331-1881 440 331-2032 An entire years worth 2200 pages construction technical how-to articles Also AMA News regular columns covering Radio Control Control Line Free Flight modeling Browse issue quickly search entire year specific C D Libraries has reproduced page has assembled comprehensive database entire years worth issues Supported queries Article title author subject keyword keyname issue advertisement Other features Embedded text strings supported throughout full-color SVGA image display easy use Produced distributed CD Libraries Inc under license Academy Mini-Sander$335 Garnet Sandpaper 2 trite$235 Mined Garnet & Waterpreat Sandpaper$235 Waterprant Sandpaper 3 gritn $245 part building model Applied Design Corporation PO Box 3384 Torrance CA 90510 310-375-4120 Add 20% far chipping Send SASt ten Catalag Fax 3103751590 12 PR 12LS 145 P HAVE YOUR HOBBY DEALER CALL ON THE ORDER LINE UAV Inc 800-294-9506 OLD TIME RUBBER PLANS AND LASER CUT PARTS MMY 048 04400 Paw POnt ~2IEAaENUEfIS0 IS704$ 804 FIY1NO ACES MOTH 34 SW Conwar48I Rate P1nSOOOPtnSll 00 flL Lanzo Classic 21$ Sq keIeld Pint $700 P102000 JIMMIE ALLEN BA CABIN P1n 0600 P8050000 AL CASASOS CHAMPIONSHIP STICK ~-0 LANZO PUSS MOTh Plon $700 PtA 52000 Art Noraks Wander 3-40 MAN FAC ST 000k P404487W p018 51855 PLEASE AD 5404 FOR POSTAGE introducing new line old time plane Laser cut parts Mans CAD drawn Jim OReilly Jim has over 60 old lime rubber gas plans laser cut kits toohe designed fly Call SAM list AJI parts laser cut own 50 watt laser Laser engraved contest plaques available BOB HOLMAN PLANS P 0 BOX 741 SAN BERNARDINO CA 92402 909 885 3959 FAX 889 9307 John Eatons 25cc 15 CI Engine 10000 baIl & roller bear 1190 r 1 Electronrc magnero Prop hob & mover ocosee Hood otari / wr 4 ho Current Price $15000 S&H$1300 Avalahie Now Prop out & movot 0100 oold oeporalely Custom Uok & Ropabs done mn engines Conversiut ipoted upon request GIANT SCALE TR 260 CLOSE OUT CIOfl Dill PRICESI KIT 817900 8111825 W 848000 9111820 Md-wing aerohatic deolgo tar 2104 Ci ABS cowl notch ecoer & whee pants ARE cooered Utacote Kit weghr 15-18 us 86 wingspan ARE weight 16-19 160 92 w ogopan * * ATTEIllE SUPER DGER OWNERSI * * E nallyAoa able amach nedbarorocrodwirhloll rollerbearings Sopor T ger eng non Super heavy coty rhin improoe perlormance glow a moot br gao conoero 2500&3000-S40D0S4OOS&H 88 Model Aviation 4Blowout Sale Quantities Limited Stock Hand Sale Ends August 31 1998 0a 00 42 7 lIt w -t Wnt,h4a U U H B U U U K U U U 1mm 05 nFR 40 Fiberglass Minimum purchase 10 yards Ch148 05 oz 075 oz 15 oz 2 oz 23 oz 23 oz 3 oz 32 oz Satin 4 ox 6 ox 8Hs 6 oz 6 oz 6 oz GO1O4S G0106S GOO8OS G2112S G1610S G2113S G2116S GOO2OS G2522S G16aOS G3733S G7533S G7628S 38$200 38$125 38$125 38$200 38$175 55$200 50$200 38$325 50$325 38$400 38$400 50$500 40$175 Fiberglass Tape 015 thick 2in x 36 yards $2000 Rohacell 51 12 x 24 11 x 24 $900 $600 Orders under $50 add $5 handling addition slopping VISA Mc AmEx Discover accepted No other dGEosnlo may used sale Order Toll Free 1-800-335-1276 Visit r Web Site mew cstsalescom certain read manufacturer instructions follow carefully case composites thin edge trailing edge blade may very sharp Dulling edge wise dont want lawnmower blade-type surface near fingers especially four-stroke engines since have propensity backfire under certain conditions hand-cranking can dangerous Actually should always use protective device start engine may range electric starter through chicken sticks heavy glove large proportion accidents occur because spinning propeller would assume doesnt take rocket scientist figure out getting some part anatomy caught something turning 10000 rpm will hurt dayin/day-out someone does just some safety steps can take Paint prop tips bright color can see arc Never put body prop arc Its common see people lean over model faces just inches away prop Adjust needle valve behind prop arc Dont reach around Engine manufacturers have recognized new engines have needle valve angled away prop allow place remote position Plan will put starter box cord glow plug wires used transmitter facilitate keeping items out prop Make placement ritual Watch loose clothing such jackets etc use transmitter lanyard strap make certain tucked away will just naturally swing prop youre careful Have someone hold model Firmly Work out signals ahead time Composite Structure Technology PO Box 822 Dept JT Tehachapi CA 93581-0822 Technical Support 805822-4162 Fax 805-822-4121 Stans Fiber Tech 2575 Jackson Riverside CA 92503 352-4758 E holder will know intent Nothing disconcerting have helper carry model runway surprised run up engine clear out before takeoff wasnt expected Throw away damaged prop Break others wont tempted retrieve trash can Dont try glue splice anything else Ive heard individuals state after grinding bit blade tips takeoff Oh well its probably still balanced since ground off both tips Dont believe Besides may see split runs lengthwise both blades Give yourself plenty runway-to-prop tip clearance minimum inch advised Remember model tricycle landing gear will lose clearance hard landing Through years Ive watched modelers lavish attention cleanliness model engine toolbox never give prop glance thats probably important pieces model Without propa good oneyoure going need really good throwing arm tall building take up sailplanes second thought latter probably wouldnt work because didnt take care engine probably wouldnt take care launching mechanism sailplane Last month said Id talk about props field etiquette guess lied Too prop revolutions enough thrust Next month Ill discuss field behavior assorted sundry Hows being redundantly repetitive ON SOME AlAS Sport-Airs Train-Airs S MICRO DIGITAL MOTOR CONTROLLERS SAFE NO GLITCH POVER ON SOFT LOB TORQUE START UP HIGH RATE SMALL SIZE LIGHT VEIGHT SELF ALIGNS TO YOUR TRANSMITTER NO ADJUSTMENT NECESSARY MICRO DEMON 100 2OAMP 1-14CELL 12x085x039 13g/46oz wires 4700Hz includes setup LED 995 *NWJ* MICRO DEMON 102 *NJIJ* 20AMP 6-8CELL BEC BRAKE 21 gI75oz wires 4700Hz 18x0S5xO39 includes setup LED$5995 SPEED DEMON 200 35AMP 1-16cELL 16 Xi 0 xO42 26g192oz wires 2400Hz$8295 VIPER MODEL PRODUCTS 3475 Edison Way Suite Nenlo Park CA 94025 1-800592-8473 VISA MASTERCARD D & J ELECTRONICS Marigold St NW Hartville OH 44632 1236330-877-1445 J ice & Repairs Most Radio Control Systems Utilizing Calibrated Test Equipment & Spectrum Analyzers Endorsd AMAi RCMA Sticker Station #105 Futaba Airtronics JR Ace HiTec Tower Cirrus World Engines & WE USE GENUINE FACTORY REPLACEMENT PARTS Complete 1991 Narrow Banding & Upgrades RCD / HITEC R/C DEALER FCC Licensed Speed Control Repairs Quality Service Fast Turn Around Shipping & Insurance Extra UPS U S Mail CODs Visit home pane http//wwwdnjelectronicscom Email davId@dnlelectronicscom iayne@dnlelectronics AMA #256123ARRLWB8YSQ s-- bbI ~NU WN DWJUDWDNV ox 208 Methuen MA 01844 phone 978 686-0319 Call write full line catalog
Edition: Model Aviation - 1998/09
Page Numbers: 84, 86, 88, 91
Bob Underwood USk~ WHAT GOES AROUND comes around least better powered trainer isnt going fly Im talking about propellerthat twisty object spins away causing model taste air flight choice propeller prop trainer critical sophisticated Pylon Pattern Scale etc model Maximum thrust speed primary goal looking something will haul model skyward allow cruise nicely let engine run smoothly stand up abuse bounced landings recent years significant progress has made producing efficient quieter props materials have gone widespread use wood composites various types Tip shapes airfoils different ideas about loading engine part revolution Theres also move using low end engine size range using upper end philosophy can reduce throttle setting rather trying squeeze extra 100 rpm has come play Which prop use During newcomer years prop recommendation chart accompanied engine standard usually saw 10 x 6 40 11 x 7 60 smaller sizes 15 19 etc engines huffed puffed way through 10000-12000 rpm unfettered mufflers fitted butterfly-style exhaust stack cover helped provide back pressure could get reliable hopefully idle Now engines propped lower rpm sound level brought down mufflers tuned pipes efficient props selecting prop consider following factors 1 What does engine manufacturer recommend Use starting point Since probably wont need strive maximum performance shouldnt too much problem reading engine reviews published some model magazines can obtain further information reviews generally cover wide range sizes pitches fit engines comfort zone will suggested Engines tuned timed work efficiently particular rpm range two-stroke engines often happier singing along higher rpm fourstrokes latter restricted lower speeds because valves tend float higher rpms Good question Difficult answer Wood doesnt tend last long ding landing scrape nick wood prop history However wood inexpensive compared composites possibility inconsistency stiffness hardness wooden propeller because nature wood itself hidden knot vein softer wood etc contribute create unknown composite generally will consistent Whether its wood composite check prop frequently cracks fatigue Grasp blades twist bend detect problems Wooden props may develop cracks hub along length blade composites tend flex create stress hub have spinner model fatigue points may hidden inside Its good idea check prop tightness start flying session Wood props tend compress over time loosen Props designed help models fly fly themselves 3 Balance props keep balanced Engines tend vibrate enough putting out-of-balance stick front turning 10000 rpm holding model running way out balance may stimulating imagine what 84 Model Aviation ould use wood composites Easy hand starts Slower smoother idle & mid-range Ughtweight- 3 oz less battery pack Better top end power Easy install achining wiring required Can Installed minutes hand tools electronic parts installed small ruggea anc ea aiui - x 1 5/8 x 1 3/16 No moving parts wear out get out adjustment new lightweight machined aluminum flywheel Timing adjustable few degrees fine tune engineIWodefsLZ have complete ignitien systems fer MeCulloch RyobiBstSeRing weed eater engines accessories pails available n5ofl ignition engine Custom installation available doing components solder joints radio system 4 Diameter pitch diameter hard figure Its total length prop Pitch other hand easy determine its twist angle blades set see number such used early column 10 x 6 first number refers diameter inches second pitch twist blade Both blades will should carry same pitch Some props will carry washed out pitch such 12 x 6-10 means pitch blades varies hub tip average newcomer type prop necessity may worth try youre having problem getting right rpmbite combination pull model 5 Other host differences exist between brands props within same brand instance youll find indicating fourstroke engines some feature scimitarshaped blades Other will feature wide blades still others very narrow wide blades designed creating greater thrust lower rpm narrow blades tend speed props thrust created much higher rpm often suggested APC increase either diameter pitch number optimum results 10 x 6 would suggest using 11 x6orlOx7 Years ago plastic nylon props carried specific instructions steps followed before used essential set prevent fatigue especially hub area newer composite materials generally require much preparation construction usually resins fibers impregnated resin Some use bits fiber others use continuous strands running length prop 86 Model Avjation entire years worth Model Aviation issues work get out aeromodeling experience 440 331-1881 440 331-2032 An entire years worth 2200 pages construction technical how-to articles Also AMA News regular columns covering Radio Control Control Line Free Flight modeling Browse issue quickly search entire year specific C D Libraries has reproduced page has assembled comprehensive database entire years worth issues Supported queries Article title author subject keyword keyname issue advertisement Other features Embedded text strings supported throughout full-color SVGA image display easy use Produced distributed CD Libraries Inc under license Academy Mini-Sander$335 Garnet Sandpaper 2 trite$235 Mined Garnet & Waterpreat Sandpaper$235 Waterprant Sandpaper 3 gritn $245 part building model Applied Design Corporation PO Box 3384 Torrance CA 90510 310-375-4120 Add 20% far chipping Send SASt ten Catalag Fax 3103751590 12 PR 12LS 145 P HAVE YOUR HOBBY DEALER CALL ON THE ORDER LINE UAV Inc 800-294-9506 OLD TIME RUBBER PLANS AND LASER CUT PARTS MMY 048 04400 Paw POnt ~2IEAaENUEfIS0 IS704$ 804 FIY1NO ACES MOTH 34 SW Conwar48I Rate P1nSOOOPtnSll 00 flL Lanzo Classic 21$ Sq keIeld Pint $700 P102000 JIMMIE ALLEN BA CABIN P1n 0600 P8050000 AL CASASOS CHAMPIONSHIP STICK ~-0 LANZO PUSS MOTh Plon $700 PtA 52000 Art Noraks Wander 3-40 MAN FAC ST 000k P404487W p018 51855 PLEASE AD 5404 FOR POSTAGE introducing new line old time plane Laser cut parts Mans CAD drawn Jim OReilly Jim has over 60 old lime rubber gas plans laser cut kits toohe designed fly Call SAM list AJI parts laser cut own 50 watt laser Laser engraved contest plaques available BOB HOLMAN PLANS P 0 BOX 741 SAN BERNARDINO CA 92402 909 885 3959 FAX 889 9307 John Eatons 25cc 15 CI Engine 10000 baIl & roller bear 1190 r 1 Electronrc magnero Prop hob & mover ocosee Hood otari / wr 4 ho Current Price $15000 S&H$1300 Avalahie Now Prop out & movot 0100 oold oeporalely Custom Uok & Ropabs done mn engines Conversiut ipoted upon request GIANT SCALE TR 260 CLOSE OUT CIOfl Dill PRICESI KIT 817900 8111825 W 848000 9111820 Md-wing aerohatic deolgo tar 2104 Ci ABS cowl notch ecoer & whee pants ARE cooered Utacote Kit weghr 15-18 us 86 wingspan ARE weight 16-19 160 92 w ogopan * * ATTEIllE SUPER DGER OWNERSI * * E nallyAoa able amach nedbarorocrodwirhloll rollerbearings Sopor T ger eng non Super heavy coty rhin improoe perlormance glow a moot br gao conoero 2500&3000-S40D0S4OOS&H 88 Model Aviation 4Blowout Sale Quantities Limited Stock Hand Sale Ends August 31 1998 0a 00 42 7 lIt w -t Wnt,h4a U U H B U U U K U U U 1mm 05 nFR 40 Fiberglass Minimum purchase 10 yards Ch148 05 oz 075 oz 15 oz 2 oz 23 oz 23 oz 3 oz 32 oz Satin 4 ox 6 ox 8Hs 6 oz 6 oz 6 oz GO1O4S G0106S GOO8OS G2112S G1610S G2113S G2116S GOO2OS G2522S G16aOS G3733S G7533S G7628S 38$200 38$125 38$125 38$200 38$175 55$200 50$200 38$325 50$325 38$400 38$400 50$500 40$175 Fiberglass Tape 015 thick 2in x 36 yards $2000 Rohacell 51 12 x 24 11 x 24 $900 $600 Orders under $50 add $5 handling addition slopping VISA Mc AmEx Discover accepted No other dGEosnlo may used sale Order Toll Free 1-800-335-1276 Visit r Web Site mew cstsalescom certain read manufacturer instructions follow carefully case composites thin edge trailing edge blade may very sharp Dulling edge wise dont want lawnmower blade-type surface near fingers especially four-stroke engines since have propensity backfire under certain conditions hand-cranking can dangerous Actually should always use protective device start engine may range electric starter through chicken sticks heavy glove large proportion accidents occur because spinning propeller would assume doesnt take rocket scientist figure out getting some part anatomy caught something turning 10000 rpm will hurt dayin/day-out someone does just some safety steps can take Paint prop tips bright color can see arc Never put body prop arc Its common see people lean over model faces just inches away prop Adjust needle valve behind prop arc Dont reach around Engine manufacturers have recognized new engines have needle valve angled away prop allow place remote position Plan will put starter box cord glow plug wires used transmitter facilitate keeping items out prop Make placement ritual Watch loose clothing such jackets etc use transmitter lanyard strap make certain tucked away will just naturally swing prop youre careful Have someone hold model Firmly Work out signals ahead time Composite Structure Technology PO Box 822 Dept JT Tehachapi CA 93581-0822 Technical Support 805822-4162 Fax 805-822-4121 Stans Fiber Tech 2575 Jackson Riverside CA 92503 352-4758 E holder will know intent Nothing disconcerting have helper carry model runway surprised run up engine clear out before takeoff wasnt expected Throw away damaged prop Break others wont tempted retrieve trash can Dont try glue splice anything else Ive heard individuals state after grinding bit blade tips takeoff Oh well its probably still balanced since ground off both tips Dont believe Besides may see split runs lengthwise both blades Give yourself plenty runway-to-prop tip clearance minimum inch advised Remember model tricycle landing gear will lose clearance hard landing Through years Ive watched modelers lavish attention cleanliness model engine toolbox never give prop glance thats probably important pieces model Without propa good oneyoure going need really good throwing arm tall building take up sailplanes second thought latter probably wouldnt work because didnt take care engine probably wouldnt take care launching mechanism sailplane Last month said Id talk about props field etiquette guess lied Too prop revolutions enough thrust Next month Ill discuss field behavior assorted sundry Hows being redundantly repetitive ON SOME AlAS Sport-Airs Train-Airs S MICRO DIGITAL MOTOR CONTROLLERS SAFE NO GLITCH POVER ON SOFT LOB TORQUE START UP HIGH RATE SMALL SIZE LIGHT VEIGHT SELF ALIGNS TO YOUR TRANSMITTER NO ADJUSTMENT NECESSARY MICRO DEMON 100 2OAMP 1-14CELL 12x085x039 13g/46oz wires 4700Hz includes setup LED 995 *NWJ* MICRO DEMON 102 *NJIJ* 20AMP 6-8CELL BEC BRAKE 21 gI75oz wires 4700Hz 18x0S5xO39 includes setup LED$5995 SPEED DEMON 200 35AMP 1-16cELL 16 Xi 0 xO42 26g192oz wires 2400Hz$8295 VIPER MODEL PRODUCTS 3475 Edison Way Suite Nenlo Park CA 94025 1-800592-8473 VISA MASTERCARD D & J ELECTRONICS Marigold St NW Hartville OH 44632 1236330-877-1445 J ice & Repairs Most Radio Control Systems Utilizing Calibrated Test Equipment & Spectrum Analyzers Endorsd AMAi RCMA Sticker Station #105 Futaba Airtronics JR Ace HiTec Tower Cirrus World Engines & WE USE GENUINE FACTORY REPLACEMENT PARTS Complete 1991 Narrow Banding & Upgrades RCD / HITEC R/C DEALER FCC Licensed Speed Control Repairs Quality Service Fast Turn Around Shipping & Insurance Extra UPS U S Mail CODs Visit home pane http//wwwdnjelectronicscom Email davId@dnlelectronicscom iayne@dnlelectronics AMA #256123ARRLWB8YSQ s-- bbI ~NU WN DWJUDWDNV ox 208 Methuen MA 01844 phone 978 686-0319 Call write full line catalog
Edition: Model Aviation - 1998/09
Page Numbers: 84, 86, 88, 91
Bob Underwood USk~ WHAT GOES AROUND comes around least better powered trainer isnt going fly Im talking about propellerthat twisty object spins away causing model taste air flight choice propeller prop trainer critical sophisticated Pylon Pattern Scale etc model Maximum thrust speed primary goal looking something will haul model skyward allow cruise nicely let engine run smoothly stand up abuse bounced landings recent years significant progress has made producing efficient quieter props materials have gone widespread use wood composites various types Tip shapes airfoils different ideas about loading engine part revolution Theres also move using low end engine size range using upper end philosophy can reduce throttle setting rather trying squeeze extra 100 rpm has come play Which prop use During newcomer years prop recommendation chart accompanied engine standard usually saw 10 x 6 40 11 x 7 60 smaller sizes 15 19 etc engines huffed puffed way through 10000-12000 rpm unfettered mufflers fitted butterfly-style exhaust stack cover helped provide back pressure could get reliable hopefully idle Now engines propped lower rpm sound level brought down mufflers tuned pipes efficient props selecting prop consider following factors 1 What does engine manufacturer recommend Use starting point Since probably wont need strive maximum performance shouldnt too much problem reading engine reviews published some model magazines can obtain further information reviews generally cover wide range sizes pitches fit engines comfort zone will suggested Engines tuned timed work efficiently particular rpm range two-stroke engines often happier singing along higher rpm fourstrokes latter restricted lower speeds because valves tend float higher rpms Good question Difficult answer Wood doesnt tend last long ding landing scrape nick wood prop history However wood inexpensive compared composites possibility inconsistency stiffness hardness wooden propeller because nature wood itself hidden knot vein softer wood etc contribute create unknown composite generally will consistent Whether its wood composite check prop frequently cracks fatigue Grasp blades twist bend detect problems Wooden props may develop cracks hub along length blade composites tend flex create stress hub have spinner model fatigue points may hidden inside Its good idea check prop tightness start flying session Wood props tend compress over time loosen Props designed help models fly fly themselves 3 Balance props keep balanced Engines tend vibrate enough putting out-of-balance stick front turning 10000 rpm holding model running way out balance may stimulating imagine what 84 Model Aviation ould use wood composites Easy hand starts Slower smoother idle & mid-range Ughtweight- 3 oz less battery pack Better top end power Easy install achining wiring required Can Installed minutes hand tools electronic parts installed small ruggea anc ea aiui - x 1 5/8 x 1 3/16 No moving parts wear out get out adjustment new lightweight machined aluminum flywheel Timing adjustable few degrees fine tune engineIWodefsLZ have complete ignitien systems fer MeCulloch RyobiBstSeRing weed eater engines accessories pails available n5ofl ignition engine Custom installation available doing components solder joints radio system 4 Diameter pitch diameter hard figure Its total length prop Pitch other hand easy determine its twist angle blades set see number such used early column 10 x 6 first number refers diameter inches second pitch twist blade Both blades will should carry same pitch Some props will carry washed out pitch such 12 x 6-10 means pitch blades varies hub tip average newcomer type prop necessity may worth try youre having problem getting right rpmbite combination pull model 5 Other host differences exist between brands props within same brand instance youll find indicating fourstroke engines some feature scimitarshaped blades Other will feature wide blades still others very narrow wide blades designed creating greater thrust lower rpm narrow blades tend speed props thrust created much higher rpm often suggested APC increase either diameter pitch number optimum results 10 x 6 would suggest using 11 x6orlOx7 Years ago plastic nylon props carried specific instructions steps followed before used essential set prevent fatigue especially hub area newer composite materials generally require much preparation construction usually resins fibers impregnated resin Some use bits fiber others use continuous strands running length prop 86 Model Avjation entire years worth Model Aviation issues work get out aeromodeling experience 440 331-1881 440 331-2032 An entire years worth 2200 pages construction technical how-to articles Also AMA News regular columns covering Radio Control Control Line Free Flight modeling Browse issue quickly search entire year specific C D Libraries has reproduced page has assembled comprehensive database entire years worth issues Supported queries Article title author subject keyword keyname issue advertisement Other features Embedded text strings supported throughout full-color SVGA image display easy use Produced distributed CD Libraries Inc under license Academy Mini-Sander$335 Garnet Sandpaper 2 trite$235 Mined Garnet & Waterpreat Sandpaper$235 Waterprant Sandpaper 3 gritn $245 part building model Applied Design Corporation PO Box 3384 Torrance CA 90510 310-375-4120 Add 20% far chipping Send SASt ten Catalag Fax 3103751590 12 PR 12LS 145 P HAVE YOUR HOBBY DEALER CALL ON THE ORDER LINE UAV Inc 800-294-9506 OLD TIME RUBBER PLANS AND LASER CUT PARTS MMY 048 04400 Paw POnt ~2IEAaENUEfIS0 IS704$ 804 FIY1NO ACES MOTH 34 SW Conwar48I Rate P1nSOOOPtnSll 00 flL Lanzo Classic 21$ Sq keIeld Pint $700 P102000 JIMMIE ALLEN BA CABIN P1n 0600 P8050000 AL CASASOS CHAMPIONSHIP STICK ~-0 LANZO PUSS MOTh Plon $700 PtA 52000 Art Noraks Wander 3-40 MAN FAC ST 000k P404487W p018 51855 PLEASE AD 5404 FOR POSTAGE introducing new line old time plane Laser cut parts Mans CAD drawn Jim OReilly Jim has over 60 old lime rubber gas plans laser cut kits toohe designed fly Call SAM list AJI parts laser cut own 50 watt laser Laser engraved contest plaques available BOB HOLMAN PLANS P 0 BOX 741 SAN BERNARDINO CA 92402 909 885 3959 FAX 889 9307 John Eatons 25cc 15 CI Engine 10000 baIl & roller bear 1190 r 1 Electronrc magnero Prop hob & mover ocosee Hood otari / wr 4 ho Current Price $15000 S&H$1300 Avalahie Now Prop out & movot 0100 oold oeporalely Custom Uok & Ropabs done mn engines Conversiut ipoted upon request GIANT SCALE TR 260 CLOSE OUT CIOfl Dill PRICESI KIT 817900 8111825 W 848000 9111820 Md-wing aerohatic deolgo tar 2104 Ci ABS cowl notch ecoer & whee pants ARE cooered Utacote Kit weghr 15-18 us 86 wingspan ARE weight 16-19 160 92 w ogopan * * ATTEIllE SUPER DGER OWNERSI * * E nallyAoa able amach nedbarorocrodwirhloll rollerbearings Sopor T ger eng non Super heavy coty rhin improoe perlormance glow a moot br gao conoero 2500&3000-S40D0S4OOS&H 88 Model Aviation 4Blowout Sale Quantities Limited Stock Hand Sale Ends August 31 1998 0a 00 42 7 lIt w -t Wnt,h4a U U H B U U U K U U U 1mm 05 nFR 40 Fiberglass Minimum purchase 10 yards Ch148 05 oz 075 oz 15 oz 2 oz 23 oz 23 oz 3 oz 32 oz Satin 4 ox 6 ox 8Hs 6 oz 6 oz 6 oz GO1O4S G0106S GOO8OS G2112S G1610S G2113S G2116S GOO2OS G2522S G16aOS G3733S G7533S G7628S 38$200 38$125 38$125 38$200 38$175 55$200 50$200 38$325 50$325 38$400 38$400 50$500 40$175 Fiberglass Tape 015 thick 2in x 36 yards $2000 Rohacell 51 12 x 24 11 x 24 $900 $600 Orders under $50 add $5 handling addition slopping VISA Mc AmEx Discover accepted No other dGEosnlo may used sale Order Toll Free 1-800-335-1276 Visit r Web Site mew cstsalescom certain read manufacturer instructions follow carefully case composites thin edge trailing edge blade may very sharp Dulling edge wise dont want lawnmower blade-type surface near fingers especially four-stroke engines since have propensity backfire under certain conditions hand-cranking can dangerous Actually should always use protective device start engine may range electric starter through chicken sticks heavy glove large proportion accidents occur because spinning propeller would assume doesnt take rocket scientist figure out getting some part anatomy caught something turning 10000 rpm will hurt dayin/day-out someone does just some safety steps can take Paint prop tips bright color can see arc Never put body prop arc Its common see people lean over model faces just inches away prop Adjust needle valve behind prop arc Dont reach around Engine manufacturers have recognized new engines have needle valve angled away prop allow place remote position Plan will put starter box cord glow plug wires used transmitter facilitate keeping items out prop Make placement ritual Watch loose clothing such jackets etc use transmitter lanyard strap make certain tucked away will just naturally swing prop youre careful Have someone hold model Firmly Work out signals ahead time Composite Structure Technology PO Box 822 Dept JT Tehachapi CA 93581-0822 Technical Support 805822-4162 Fax 805-822-4121 Stans Fiber Tech 2575 Jackson Riverside CA 92503 352-4758 E holder will know intent Nothing disconcerting have helper carry model runway surprised run up engine clear out before takeoff wasnt expected Throw away damaged prop Break others wont tempted retrieve trash can Dont try glue splice anything else Ive heard individuals state after grinding bit blade tips takeoff Oh well its probably still balanced since ground off both tips Dont believe Besides may see split runs lengthwise both blades Give yourself plenty runway-to-prop tip clearance minimum inch advised Remember model tricycle landing gear will lose clearance hard landing Through years Ive watched modelers lavish attention cleanliness model engine toolbox never give prop glance thats probably important pieces model Without propa good oneyoure going need really good throwing arm tall building take up sailplanes second thought latter probably wouldnt work because didnt take care engine probably wouldnt take care launching mechanism sailplane Last month said Id talk about props field etiquette guess lied Too prop revolutions enough thrust Next month Ill discuss field behavior assorted sundry Hows being redundantly repetitive ON SOME AlAS Sport-Airs Train-Airs S MICRO DIGITAL MOTOR CONTROLLERS SAFE NO GLITCH POVER ON SOFT LOB TORQUE START UP HIGH RATE SMALL SIZE LIGHT VEIGHT SELF ALIGNS TO YOUR TRANSMITTER NO ADJUSTMENT NECESSARY MICRO DEMON 100 2OAMP 1-14CELL 12x085x039 13g/46oz wires 4700Hz includes setup LED 995 *NWJ* MICRO DEMON 102 *NJIJ* 20AMP 6-8CELL BEC BRAKE 21 gI75oz wires 4700Hz 18x0S5xO39 includes setup LED$5995 SPEED DEMON 200 35AMP 1-16cELL 16 Xi 0 xO42 26g192oz wires 2400Hz$8295 VIPER MODEL PRODUCTS 3475 Edison Way Suite Nenlo Park CA 94025 1-800592-8473 VISA MASTERCARD D & J ELECTRONICS Marigold St NW Hartville OH 44632 1236330-877-1445 J ice & Repairs Most Radio Control Systems Utilizing Calibrated Test Equipment & Spectrum Analyzers Endorsd AMAi RCMA Sticker Station #105 Futaba Airtronics JR Ace HiTec Tower Cirrus World Engines & WE USE GENUINE FACTORY REPLACEMENT PARTS Complete 1991 Narrow Banding & Upgrades RCD / HITEC R/C DEALER FCC Licensed Speed Control Repairs Quality Service Fast Turn Around Shipping & Insurance Extra UPS U S Mail CODs Visit home pane http//wwwdnjelectronicscom Email davId@dnlelectronicscom iayne@dnlelectronics AMA #256123ARRLWB8YSQ s-- bbI ~NU WN DWJUDWDNV ox 208 Methuen MA 01844 phone 978 686-0319 Call write full line catalog
