Free Flight Indoor BudTenny HOW DID THAT HAPPEN About time last year reported AMA made extraordinary effort get Nats planning input Indoor fliers tracked effort through few evolutions point seemed 1986 Indoor Nats would great meet Well things kind fell apart First AMA couldnt get solid clearance big Coliseum Lake Charles meet shifted Municipal Auditorium downtown thought dibs site turned out true due communications problem So meet shifted mid-week conflict Outdoor events Meanwhile advance entry poor 28 entries events dictated planned three-day meet reduced two days cut costs what appeared smallest Indoor Nats years final entry 42 events really great time read will have read Nats results know competitively good meet told background advance entry Nats very critical fact advance entry 28 Indoor Nats very close point Indoor could have cancelled Completely aside possibility no way Nats can operated effectively 60% late entry logistics class AA Indoor meet near home bad enough talking about 1500 miles home office unfamiliar site Often meet personnel have imported living expenses furnished Nats budg et meet equipment processing timing etc has brought same problem exists meet paperwork awardseverything local meet can send someone back what forgot Think about After entry fee applicable next years license cant make / Styrofoam can also used prop blocks save some bucks Some tricks make easier read text Incidentallythe same comments apply other big meets like U S Indoor Champion ships other meet lot trouble handle advance entry assured effort well worth problems involved Note paying attention Competition Newsletter section last months issue magazine carried notice concerning Easy B Rules Interpretation banning variablepitch variable-diameter props interpre tation has passed Contest Board procedures will become part Rule Book 1988 interpretation has slightly modified compared what published earlier sentence has added addition Socketed propeller hubs allow blade replacement manual pitch adjustment acceptable Anatomy rules interpretation Easy B An alternate prop blOck construction wnicn especially usefulfor non-helical-pitch prop designs prop blocks shown builtup-style Indoor props interpretation discussed above grew out contest Easy B won model using variable-pitch prop CD permitted model fly since existing rules did specifically prohibit VP props Another contest ant happened member Indoor Contest Board requested ruling ICB Note Any AMA member affected CDs decision could have done same Some contestants view pushing rules using fancy Easy B props example cheating aint necessarily Perhaps much 30% design advancement hobby originates way purpose Contest Board refine rules both rules proposals inter pretation requested resolve fine points whole CB activity supposed informed process experienced modelers appointed Contest Board guided other AMA members Personally applaud increase model performance via loop holes imperfect rules No smart enough write rules perfect enough outlast advances technology system works fix problems Use Continued page 152 / / / 7 7 Figure 1L showsthetraditional carved prop block layoutwith symbolic notations needed formula seetext Figure 2 Center shows blade template added carved block Figure 4 R depicts alternate cheaper way make traditional-style block January 1987 57 Universal prop fixture Pete Andrews Theres props month BENTOM BROWN JR CAMPBELL EASY COVERITE COX DUBRO BUILT MODELS- ENYA FAI FLYLIN FOX- GOLDBERG- GOLDEN AGE REPRO GENE DUBOIS GUILLOW- K&B K&S L R MRC OS MAX PACTRA PECK-POLYMER PERFECT R N MODELS- SEAGLEN SIG ISTERLING SULLIVAN SUPER TIGRE TAFFINDER TELCO TOP FLITE TREXLER WILLIAMS & OTHERS ESTES MODEL ROCKETSI illustrations over 700 Kits choose IMAILORDER PHONEORDER IN STOREI 11111 VALLEY HOBBY CENTER 327 W Main St LansdaIuPa 19446 RUBBER Sizes 1/4 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $1 75 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber ndse. add $150 UPS Over$15 add 10% MEW e mba classIcs P30 DroPS Air Expross Mini-Pout CrickEt bulks Front i assumbln SPrig kits Stardustor Satellites winders hardware looks morn ZONA SAWS famous Itne hobby saws Razor #200 $255 Newsletters/Winter Continued page 149 taken painsand leaves pains reader nuts bolts what newsletter editor doing youor what might doing club Think about Words have wings too know did Homer call winged words because go through air FF Indoor/Tenny Continued page 57 Prop blocks Figure 1 shows sketch traditional block used build Indoor props typically carved balsa block andthepitch props built block fixed once block carved built-up block shown previous column can constructed kind pitch distribution either uniform varying pitch across blade However carved block has uniform pitch distribution defined block dimensions according formula below formula defines what called true pitch helical pitch reasoning behind use non-helical pitch distribution usually concerns blade loading blade flare assumed inefficiencies slow-turning props very high blade angles formula Pitch x D xT/W formula D diameter W k width T block thickness Figure 1 block length shown D/2 block obviously can longer planned prop case multiply block length two use D formula starting carve block mark guide lines X Y block work very carefully final block surface must flat exactly line guidelines Warning once use sanding block finish up grit sandpaper can remain embedded surface can damage carving blade decide carve have block carved transfer blade template block shown Figure 2 Some builders glue small blocks outside template hold blade outline place during construction Instead small temporary strips can pinned place removed after both blades have built leaves block clear blade covered right block prop covered block freshly-covered blade should returned block cure out before covering second blade Similarly after repairs recovering return blade block until completely dry Other alternatives high cost balsa especially block balsa other approaches costless Figure 3 shows way build up equivalent solid block shown Figures 1 2 Start rectangular box top front missing Add angled top buildup prop platform narrow strips shown Trim off ragged ends sand palnt work surfaces case pitch computed same solid block need take care placing top sheet finished platform correct angle photos shows another approach styrofoam After choosing desired pitch imbed two pieces music wire Vt6 minimum diameter styrofoam along guideline locations wires can used guides hot-wire trimmer styrofoam must pro tected model airplane glue will dissolve Also use care straight pins can erode plastic repeated inser tions same location Another photo shows universal prop fixture built Pete Andrews approach makes possible select feasible pitch distribution tested fact fine-tuning prop design should very easytest prop make change test new prop comparison previous Finally third photo shows yet another approach building props non-helical pitch distribution Small pegs attached individual rib stations support spar hold blade outline place Note outer pegs must much shorter ones photo prop covered fixture Attention CDs newsletter editors havent sent flying schedules early 1987 now too late time read can use dates late March due Model Aviation publication deadiines Bud Tenny PO Box 545 Richardson TX 75080 SAFE FLYING IS NO ACCIDENT 152 Model Aviation PRESENTING FL INGER THE ULTIMATE SMALL SAILPLANE HANDLAUNCH HI-STARTorSLOPE WINGSPAN 57 WEIGHT l2oz MACHINECUT PARTS DEALERS&DIST INQUIRIES INVITEDFLINGER LJMP 110 $2995 ELECTRA L ITE-ICARUS-PANTERA METEOR-ELECTR ICUS -WHISTLER PR ELUDE-COMET LARRY JOLLY MODEL PRODUCTS 5501 W COMO SANTA ANA CALIFORNIA 92703 714 826 6861 Replacement Blades available dealer Send $100 1986 Catalog F Model Supply P0 Box 3957 Torrance CA 90510
Edition: Model Aviation - 1987/01
Page Numbers: 57, 152
Free Flight Indoor BudTenny HOW DID THAT HAPPEN About time last year reported AMA made extraordinary effort get Nats planning input Indoor fliers tracked effort through few evolutions point seemed 1986 Indoor Nats would great meet Well things kind fell apart First AMA couldnt get solid clearance big Coliseum Lake Charles meet shifted Municipal Auditorium downtown thought dibs site turned out true due communications problem So meet shifted mid-week conflict Outdoor events Meanwhile advance entry poor 28 entries events dictated planned three-day meet reduced two days cut costs what appeared smallest Indoor Nats years final entry 42 events really great time read will have read Nats results know competitively good meet told background advance entry Nats very critical fact advance entry 28 Indoor Nats very close point Indoor could have cancelled Completely aside possibility no way Nats can operated effectively 60% late entry logistics class AA Indoor meet near home bad enough talking about 1500 miles home office unfamiliar site Often meet personnel have imported living expenses furnished Nats budg et meet equipment processing timing etc has brought same problem exists meet paperwork awardseverything local meet can send someone back what forgot Think about After entry fee applicable next years license cant make / Styrofoam can also used prop blocks save some bucks Some tricks make easier read text Incidentallythe same comments apply other big meets like U S Indoor Champion ships other meet lot trouble handle advance entry assured effort well worth problems involved Note paying attention Competition Newsletter section last months issue magazine carried notice concerning Easy B Rules Interpretation banning variablepitch variable-diameter props interpre tation has passed Contest Board procedures will become part Rule Book 1988 interpretation has slightly modified compared what published earlier sentence has added addition Socketed propeller hubs allow blade replacement manual pitch adjustment acceptable Anatomy rules interpretation Easy B An alternate prop blOck construction wnicn especially usefulfor non-helical-pitch prop designs prop blocks shown builtup-style Indoor props interpretation discussed above grew out contest Easy B won model using variable-pitch prop CD permitted model fly since existing rules did specifically prohibit VP props Another contest ant happened member Indoor Contest Board requested ruling ICB Note Any AMA member affected CDs decision could have done same Some contestants view pushing rules using fancy Easy B props example cheating aint necessarily Perhaps much 30% design advancement hobby originates way purpose Contest Board refine rules both rules proposals inter pretation requested resolve fine points whole CB activity supposed informed process experienced modelers appointed Contest Board guided other AMA members Personally applaud increase model performance via loop holes imperfect rules No smart enough write rules perfect enough outlast advances technology system works fix problems Use Continued page 152 / / / 7 7 Figure 1L showsthetraditional carved prop block layoutwith symbolic notations needed formula seetext Figure 2 Center shows blade template added carved block Figure 4 R depicts alternate cheaper way make traditional-style block January 1987 57 Universal prop fixture Pete Andrews Theres props month BENTOM BROWN JR CAMPBELL EASY COVERITE COX DUBRO BUILT MODELS- ENYA FAI FLYLIN FOX- GOLDBERG- GOLDEN AGE REPRO GENE DUBOIS GUILLOW- K&B K&S L R MRC OS MAX PACTRA PECK-POLYMER PERFECT R N MODELS- SEAGLEN SIG ISTERLING SULLIVAN SUPER TIGRE TAFFINDER TELCO TOP FLITE TREXLER WILLIAMS & OTHERS ESTES MODEL ROCKETSI illustrations over 700 Kits choose IMAILORDER PHONEORDER IN STOREI 11111 VALLEY HOBBY CENTER 327 W Main St LansdaIuPa 19446 RUBBER Sizes 1/4 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $1 75 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber ndse. add $150 UPS Over$15 add 10% MEW e mba classIcs P30 DroPS Air Expross Mini-Pout CrickEt bulks Front i assumbln SPrig kits Stardustor Satellites winders hardware looks morn ZONA SAWS famous Itne hobby saws Razor #200 $255 Newsletters/Winter Continued page 149 taken painsand leaves pains reader nuts bolts what newsletter editor doing youor what might doing club Think about Words have wings too know did Homer call winged words because go through air FF Indoor/Tenny Continued page 57 Prop blocks Figure 1 shows sketch traditional block used build Indoor props typically carved balsa block andthepitch props built block fixed once block carved built-up block shown previous column can constructed kind pitch distribution either uniform varying pitch across blade However carved block has uniform pitch distribution defined block dimensions according formula below formula defines what called true pitch helical pitch reasoning behind use non-helical pitch distribution usually concerns blade loading blade flare assumed inefficiencies slow-turning props very high blade angles formula Pitch x D xT/W formula D diameter W k width T block thickness Figure 1 block length shown D/2 block obviously can longer planned prop case multiply block length two use D formula starting carve block mark guide lines X Y block work very carefully final block surface must flat exactly line guidelines Warning once use sanding block finish up grit sandpaper can remain embedded surface can damage carving blade decide carve have block carved transfer blade template block shown Figure 2 Some builders glue small blocks outside template hold blade outline place during construction Instead small temporary strips can pinned place removed after both blades have built leaves block clear blade covered right block prop covered block freshly-covered blade should returned block cure out before covering second blade Similarly after repairs recovering return blade block until completely dry Other alternatives high cost balsa especially block balsa other approaches costless Figure 3 shows way build up equivalent solid block shown Figures 1 2 Start rectangular box top front missing Add angled top buildup prop platform narrow strips shown Trim off ragged ends sand palnt work surfaces case pitch computed same solid block need take care placing top sheet finished platform correct angle photos shows another approach styrofoam After choosing desired pitch imbed two pieces music wire Vt6 minimum diameter styrofoam along guideline locations wires can used guides hot-wire trimmer styrofoam must pro tected model airplane glue will dissolve Also use care straight pins can erode plastic repeated inser tions same location Another photo shows universal prop fixture built Pete Andrews approach makes possible select feasible pitch distribution tested fact fine-tuning prop design should very easytest prop make change test new prop comparison previous Finally third photo shows yet another approach building props non-helical pitch distribution Small pegs attached individual rib stations support spar hold blade outline place Note outer pegs must much shorter ones photo prop covered fixture Attention CDs newsletter editors havent sent flying schedules early 1987 now too late time read can use dates late March due Model Aviation publication deadiines Bud Tenny PO Box 545 Richardson TX 75080 SAFE FLYING IS NO ACCIDENT 152 Model Aviation PRESENTING FL INGER THE ULTIMATE SMALL SAILPLANE HANDLAUNCH HI-STARTorSLOPE WINGSPAN 57 WEIGHT l2oz MACHINECUT PARTS DEALERS&DIST INQUIRIES INVITEDFLINGER LJMP 110 $2995 ELECTRA L ITE-ICARUS-PANTERA METEOR-ELECTR ICUS -WHISTLER PR ELUDE-COMET LARRY JOLLY MODEL PRODUCTS 5501 W COMO SANTA ANA CALIFORNIA 92703 714 826 6861 Replacement Blades available dealer Send $100 1986 Catalog F Model Supply P0 Box 3957 Torrance CA 90510