Free Flight Indoor Bud Tenny PROP STRUCTURE BASICS Prop-wobble due structural variations hardest prob lem spot fix Last time covered problems geometry blade angle twist alignment problems repairing working props remain wobble-free So get wobble-free prop begin lighter want prop harder make wobble-free Pennyplane P/P prop usually sturdy handle high power required drive three-gram model However prop world-class FAI Stick model typically will have much higher relative stress prop struc ture typical Pennyplane prop may weigh 021 oz driven 066 oz rubber ratio over 311 FAI prop may weigh 0065 oz rubber weight 036 oz55l ratio Both rubber loops may similar length P/P launch torque could twice high FAt unlimited-ceiling site Prop flare Since typical P/P prop has sheet balsa blades spar full torque prob ably wont deflect structure noticeably FAI prop built-up structure larger diameter blade area P/P structure will distort obviously quite bit under full torque structural geometry blade P/P prop matched should run properly After careful repairs damaged prop should continue work well Contrary ideas held some people weight imbalance between blades Indoor prop will have small effect compared dif ferences blade angle twist shaft misalignment about lighter props next lightest props Easy B props required balsa Competition-grade Easy B models very light props will delicate enough require unusual care during con struction spars must matched exactly described below blades must closely matched Good blade-matching Easy B requires following steps 1 Select sheet wood prop blades will cut maximum uniformi ty thickness density across entire sheet Measure thickness calipers several places along both sides sheet 2 Balance sheet check uniformity balsa density balance point center sheet uniform density 3 Inspect grain sheet using light table making sure grain completely uniform dont have light table place balsa against outside window use daylight view grain 4 If grain balsa isnt parallel edge sheet align blade templates grain grain parallel blade centerline 5 When blades cut out weigh blade sure matched As blades sanded tapered final shape monitor both thickness weight keep blades matched Use very fine sandpaper work slowly avoid removing too much wood anywhere 6 Use non-shrinking glue build prop assembly fixture special glue prevents warping thin wood glue dries fixture assures correct alignment photo shows Stan Chiltons Easy B prop block blades formed simultaneously block assembled shaft/spar combo blade time prop ever needs repair block should used assure correct alignment during repairs Chiltons prop block basic details Stans Easy B prop block shown photo center block has provision centering spar right height hold ing prop shaft vertically first blade attached spar rotated attach second blade prop shaft truly ver tical blades will have same pitch after assembly Stan makes standard block carves recess slightly larger blade leaving support spar middle recess recess correct depth spar will fit exactly under cambered blade leave spar straight carves cambered filler desired airfoil cuts slot spar result bottom half mold shape blade twist camber other half mold shown below Continued page 167 June 1986 71 Stan Chiltons Easy B prop blank blade mold Photo Chilton info column prop spar being deflection-tested Above assure both sides have equal strength stiffness before attaching blades loop solder being used test weight spar clamped testing fixture Near Right made balsa dolls clothespin deflection scale Far Right can adjusted up down tip test spar before weight applied Photos Bud Tenny presently being constructed very few changes first certainly hope article Envoy will help some way increase interest activity Con trol Line Precision Aerobatics etched stone will making changes discover problems need solved Join PAMPA take few contests expert flier area Remember expert began novice flier Enjoy sport will find time activity will improve personal flying building expertise FF Indoor/Tenny Continued page 71 prop block consists YI6-in rubber foam exactly blade-shaped epoxied dummy blade made Vio-in balsa having required twist camber Both new blade blanks clamped inside mold form twist camber Prop assembly After finishes sanding tapering blade blanks Stan soaks warm water 30 minutes Three pieces Japanese tissue cut 7-in larger blades first tissue layer goes bottom half mold first blade placed tissue covered second piece tissue second blade laid covered third tissue Finally top mold foam rubber next tissue/blade sandwich strapped place rubberbands whole assembly baked oven about 175 0F result finished prop no raised grain Apparently tissue clamping prevent raised grain blades resulting water-soaking careful avoid damaging finished blades removing mold wire inserted spar slot can used separate blades block necessary blades can separated easily Stan thins glue retarder lacquer thin ner make slow-drying glue applies fine-tipped brush glues spar lAThES ING MACNINIS INE SHOP SUPPLIES Aoation Modeler MACHINERY AN) TOOLS INC Coil roll free 1-800872-6500RepreEHHtUtIeHS WV 1-502-3538Many MH1EHfHCIWHFS P0 Boo 530-V Horriceon WV 25520 Catalep $100 Over 200 PONHE SILICONE TUBING lOft28 ft50 ft SMALL 062 dl. $200 MED 1092 dI.I $400 SHOe $1600 LANGE 126 dl. $500 $1 125 02000 US $ CAN POSTPAID DOP6E diR 0 INC 10210 MannIng Ave N Shllwater MN 55082 SCALE DOCUMENTATION WORLDS LARGEST COLLECTION Color FOTO PAAKSKOKUFAN 3oiews 36000In 100k2000 20 04ev CATALOG 52005180 SASSSCALE MODEL AESEARCH SatOlaoIrOn418 E Oceantronl M GuareeteedNewport Beach Caltorera 9255 1 either tip root blade first applies glue top edge spar brush clamps blade place top mold until glue dry Prop spars Since spar must absorb rubber energy side must same stiffness keep prop correct align ment weak damaged spar will change blade geometry under load causing prop wobble Again wood spar half must match its mate both thickness den sity match strength us ing technique splicing two half-spars cut spar halves pairs side-by-side same sheet balsa Obviously raw spar halves must start same cross section Stan Chilton uses tapered guide sand ing block taper spars identical cross sections measured locations along blade final test needed assure equal strength two spar halves Spar testing Three photos show home made deflection-tester testing spar strength first photo trio shows raw spar ing tested deflection under load spar clamped left fixture adjustable scale set tip spar weight hung spar deflection noted second spar half compared first raw spars similar strength final match can made during sanding operation major dif ference point either balsa density varies sheet spars cut ac curately After sanding exact match spars spliced prop shaft tached remaining pair photos shows close-up details dolls miniature clothes pin clamp adjustable deflection scale Next time will detail spar assembly discuss lightweight props used micro film-covered models Also will some other prop tips before going other topics Down prop wobble Bud Tenny Box 545 Richardson TX 75080 Unfinished Business Back December 1985 issue author Bud Tenny commented aspects planning 1985 Nats Indoor schedule resulted dissatisfaction among some Indoor fliers lengthy editorial comment inserted Budes column point expressing point view differing Buds time Bud Tenny addressed letter editor wishing further explain thinking said inserted some editorial comment Indoor column December 1985 MA am con cemed some remarks will create basic misunderstanding nature Nats entry blank contractual nature entry blank highly beneficial both AMA con testant Having advance knowledge entry essential AMAs logistical support worlds largest complex modeling event Having advance knowledge event scheduling special conditions allows contestant plan own participation competition strategy comments mentioned fine-tuning resolve scheduling problems have officiated 15 Nats have seen fine-tuning action almost concept certainly new AMA does fine-tune given situation breaking June 1986 167 Name Street Address city StateZip Liiih.IAb ROLLw rLANS UT PARTS 1/2A FULL KIT $2795 y A-B FULL KIT3995 B-C-D PRO KIT4495 B-C-D FULL KIT5995 Tee Dee Back Plate Mount 500 Pacifieraea 50 Surgical Tubingloft 300 Shipping $250 ea order Shipping paid orders over $6000 PRE-PAY OR COD/CA RES ADD 6-1/2% TAX ASI S. s ract other contestants Lets review situation contestant enters Nats signs contract agreeing rules scheduling other conditions cannot logically legally object planning provisions no condi tional entry Ill enter fix Nats contestant doesnt enter because conditions obviously has no leverage correct either Whether like word boycott boycott refusal participate earlier column stated dissatisfied contestant has no choice except boycott event other choice enter agree conditions stated entry blank bright spot whole situation recent Nats planning session character ized unusually strong effort get input persons outside planning group As longtime Nats worker contestant Nats buff applaud effort FF Duration/Murphy Continued page 73 What really prompted curiosity trimmed-down diminutive size spoiler its original size obviously much larger evident size built-in depression wing itself Don said spoiler worked well its original size caused model dive like kamikaze kept trimming down until arrived acceptable descent rateand what see stopped whittling Very interesting say least Nats notes Dont get lulled trap assuming schedule official Free Fight events years AMA National Championships Lakes Charles LA will re main status quo recent years Some drastic manipulating event schedules take place year permit full two-day space end Nats-week some special 50th Nats Celebration events festivities Basically competition schedule provides three days Indoor activities beginning Saturday July 26and Outdoor events traditionally have commenced Tuesday will now start Monday July 28 thereby moving whole normal five-day Outdoor event schedule forward day winding up Friday August 1 results one-day overlap Indoor Outdoor events Monday need check Official Nats Schedule find favorite PRODUCTS FOR THE DISCERNING MODELER Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers Venturi Mufflers Expansion Mufflers Helicopter Ball Mufflers ialized Exhaust Systems Unsurpass LIh.k.eeAin h P4rfomance events copy Nats schedule print ed April 1986 Competition News letter' page 111 Terry Rimert has also advised NFFS Special Event program held conjunc tion official-event schedule events include Indoor Outdoor Ornithopter Helicopter Autogiro Unlimited Rubber Biplane Embryo Endur ance Mulvihill Team Korda Open Rubber Sig Mini-Maxer 7-Il Rubber Distance Rub ber Speed HLG Team Terry will looking volunteers aid timing directing above events keep sharp eye daily NFFS sponsored-event schedule drop around offer help should attending Number 50 Gotcha again Boss caught last column may remember closing com ments consisted backdoor introduction boss Associate Editor Ross McMullen situation came about because thinskinned refusal accept subject role safety pitch caption under photo yers trooly appeared co-columnist Bob Meusers previous editions Now let say editors go Ross quite nice fella first place editors receive positions because inherent friendly natures ability get along temperamental columnists Ross cer tainly fits mold Bob understand occasionally Ross may have trim out por tion reports should result being little lengthy should have space problem particular issue occurs can always depend prompt return unused portion plus accompanying apology invitation re-use clip next submittal should still remain appropriate other major liberty columnists permit editors reworking captions under photos submit normal practice columnist sub mit suggested caption photo ever should descriptive prose prove too wordy too short available page space editor turn will perform necessary literary surgery Unfortunately operations successful once again case previous column April issue find onebut twoplaces resultant scar tissue now requires some additional plastic surgery first place reference Ed Konefes Buzzard Bombshell man brother Joe Bombshell feller second misdemeanor oc 168 Model Aviation FSCALE MODEUNG * FOR GIANT SCALE BUFFSI -t 524 4 77W-Wnl2l Rod L $48 72 Car 02U1/4 L&S $45 - 84 Fakkr D7 F, 539 62 Hoorord Rare Ike 46 60 Horoord Poe 70 EayIa OeBee 532 103 Boa 0-170 Fort $55 60 SaperororinO S6B $24 68 Dnag 046A Ok $32 89 Saperorarina 066 $35oSikor 028 Anrptr $49 62 Ca t Norok P60 $42100 Sport$36 94 Ca H oak P6E F, $54 $foe 230 Sport $497 63Lockheed Vega $34 900rinALoor Wing $56 . ool trIo 0 B 11 $48 80 Martin 74 0dM-i $39 80 Hall Spr Rn dog $43 10$ HP0 $400 Boor $49 107 Aronoa C3 Spt $35r1 68 BOonanca VOoji $39 61 Dorgla 038 Ok 833 177 Laoonrke Sedan $25 132 Doagla 038 Ob$491 73 N AM ak Bomb $49 94 Fag Cart Rarer $45 65 M Mo aade 826049 71 Martin 81$ Boorb $29 81 08 Macqa B b $45 78 Tarnere W-W Boo $35 10808 Moaqa Boorb $55 64 Car Oookk 91 1C2 $43 98 Stea FTi7Koydet $56 ar Oookk_Ft1C2 $54 99 N Bk Wdoo P61 $69 .....A 6d12Hao Coorot Ear $34 7llloag OC3 Iran $32 62 Hoor Mr Matligoo 535195 Doag DC-s Tran $55 194 Ho Mr Malligan $45 86 Hoork Taooao 13 $32 Baerng F-26A Ftr $36 1108 Cor0251/4 L&S $56 ooo8 P-26A Ftr $4$I 60 000810 M2 Mail $24 64 Beorlr C17B Stag $38 59 BroornEaaoMLA $54 - 6 Bead C17B Stag $49 107 Gram Bearat FBF $54 69 Waaa C-6 Cakin $6 68 Brital Haildog Ftr $30 Eloatra $30 73 Tranal Air 6000 $24 82 Lark 11 Elertro $45 107 Mart MB-i Boor $44 62 Sinoo T/W 067 $16 $1 Lindkergo NO-Sit $39 4 81 Stinaao 5/W 087 $34 108 FairrkFTi9 $597 122115tinorr 0/W 087 $38 9dWaaa Taper-Wing $39 59 Brietal FIr P2-B $20 75 Woatid Lyaarder $32. 78 Britol Ptr P38 -.033100 Weerld Lycander $49 118 Brletal 92-B 7 Ford Triort 4-AT $38 IE Peeaa Spar$45776 Ford Triortr 4-AT $45 83 Skyrarket 09SF-i$24114 Ford Triortr 4-AT $59 3d Car Warkk F-dO$2484 BarI-Jayre OFJ2 $56B Lark Lightog P38 538 93 Loeoiog CSAorpk $69 56 Rep Sea-Bee Aor $24 50 GraorJ2-F Dark4 RpSeaB Aorplt $39 70 GraorJ2F Dark $56 106 Pipar J-3 Cak 03959 Gorka GiV Boor $22. ark Hadoo Bork $38 117 Gotha 0-tv Boor 039-63 Gram P6F Helirat $38 68 Bran-Winklo Bird $4555 Heatlr Baky Bolt $247 54 Cart Sorift SF934 $28 Nat Sold Okra DealerPria. eakiart okano Artoeretre rnrtrann oraenee eta atarn La or * OraridOT 50r Up 6-122 Part Aloray .. Add 10% order ekippmog & eta OSA Can & Meo Oleeorhere 15% 125% arri Firtoriol oatalao 5300 inrlade Prre Earl Pore tat atior alone 510$ a, farergo add $1 0$ LEVELANDMODEL&SUPPLYCo , aca t raOoaeaolrtlotao MC FROND tarE tt r OaOaCa praaorarle 103078 DETROIT AVE CLEVELAND OHIO U103 ararrrooarooatora hore 515 FMEST 9001 216 961 360$ OC0a earoaorr
Edition: Model Aviation - 1986/06
Page Numbers: 71, 167, 168
Free Flight Indoor Bud Tenny PROP STRUCTURE BASICS Prop-wobble due structural variations hardest prob lem spot fix Last time covered problems geometry blade angle twist alignment problems repairing working props remain wobble-free So get wobble-free prop begin lighter want prop harder make wobble-free Pennyplane P/P prop usually sturdy handle high power required drive three-gram model However prop world-class FAI Stick model typically will have much higher relative stress prop struc ture typical Pennyplane prop may weigh 021 oz driven 066 oz rubber ratio over 311 FAI prop may weigh 0065 oz rubber weight 036 oz55l ratio Both rubber loops may similar length P/P launch torque could twice high FAt unlimited-ceiling site Prop flare Since typical P/P prop has sheet balsa blades spar full torque prob ably wont deflect structure noticeably FAI prop built-up structure larger diameter blade area P/P structure will distort obviously quite bit under full torque structural geometry blade P/P prop matched should run properly After careful repairs damaged prop should continue work well Contrary ideas held some people weight imbalance between blades Indoor prop will have small effect compared dif ferences blade angle twist shaft misalignment about lighter props next lightest props Easy B props required balsa Competition-grade Easy B models very light props will delicate enough require unusual care during con struction spars must matched exactly described below blades must closely matched Good blade-matching Easy B requires following steps 1 Select sheet wood prop blades will cut maximum uniformi ty thickness density across entire sheet Measure thickness calipers several places along both sides sheet 2 Balance sheet check uniformity balsa density balance point center sheet uniform density 3 Inspect grain sheet using light table making sure grain completely uniform dont have light table place balsa against outside window use daylight view grain 4 If grain balsa isnt parallel edge sheet align blade templates grain grain parallel blade centerline 5 When blades cut out weigh blade sure matched As blades sanded tapered final shape monitor both thickness weight keep blades matched Use very fine sandpaper work slowly avoid removing too much wood anywhere 6 Use non-shrinking glue build prop assembly fixture special glue prevents warping thin wood glue dries fixture assures correct alignment photo shows Stan Chiltons Easy B prop block blades formed simultaneously block assembled shaft/spar combo blade time prop ever needs repair block should used assure correct alignment during repairs Chiltons prop block basic details Stans Easy B prop block shown photo center block has provision centering spar right height hold ing prop shaft vertically first blade attached spar rotated attach second blade prop shaft truly ver tical blades will have same pitch after assembly Stan makes standard block carves recess slightly larger blade leaving support spar middle recess recess correct depth spar will fit exactly under cambered blade leave spar straight carves cambered filler desired airfoil cuts slot spar result bottom half mold shape blade twist camber other half mold shown below Continued page 167 June 1986 71 Stan Chiltons Easy B prop blank blade mold Photo Chilton info column prop spar being deflection-tested Above assure both sides have equal strength stiffness before attaching blades loop solder being used test weight spar clamped testing fixture Near Right made balsa dolls clothespin deflection scale Far Right can adjusted up down tip test spar before weight applied Photos Bud Tenny presently being constructed very few changes first certainly hope article Envoy will help some way increase interest activity Con trol Line Precision Aerobatics etched stone will making changes discover problems need solved Join PAMPA take few contests expert flier area Remember expert began novice flier Enjoy sport will find time activity will improve personal flying building expertise FF Indoor/Tenny Continued page 71 prop block consists YI6-in rubber foam exactly blade-shaped epoxied dummy blade made Vio-in balsa having required twist camber Both new blade blanks clamped inside mold form twist camber Prop assembly After finishes sanding tapering blade blanks Stan soaks warm water 30 minutes Three pieces Japanese tissue cut 7-in larger blades first tissue layer goes bottom half mold first blade placed tissue covered second piece tissue second blade laid covered third tissue Finally top mold foam rubber next tissue/blade sandwich strapped place rubberbands whole assembly baked oven about 175 0F result finished prop no raised grain Apparently tissue clamping prevent raised grain blades resulting water-soaking careful avoid damaging finished blades removing mold wire inserted spar slot can used separate blades block necessary blades can separated easily Stan thins glue retarder lacquer thin ner make slow-drying glue applies fine-tipped brush glues spar lAThES ING MACNINIS INE SHOP SUPPLIES Aoation Modeler MACHINERY AN) TOOLS INC Coil roll free 1-800872-6500RepreEHHtUtIeHS WV 1-502-3538Many MH1EHfHCIWHFS P0 Boo 530-V Horriceon WV 25520 Catalep $100 Over 200 PONHE SILICONE TUBING lOft28 ft50 ft SMALL 062 dl. $200 MED 1092 dI.I $400 SHOe $1600 LANGE 126 dl. $500 $1 125 02000 US $ CAN POSTPAID DOP6E diR 0 INC 10210 MannIng Ave N Shllwater MN 55082 SCALE DOCUMENTATION WORLDS LARGEST COLLECTION Color FOTO PAAKSKOKUFAN 3oiews 36000In 100k2000 20 04ev CATALOG 52005180 SASSSCALE MODEL AESEARCH SatOlaoIrOn418 E Oceantronl M GuareeteedNewport Beach Caltorera 9255 1 either tip root blade first applies glue top edge spar brush clamps blade place top mold until glue dry Prop spars Since spar must absorb rubber energy side must same stiffness keep prop correct align ment weak damaged spar will change blade geometry under load causing prop wobble Again wood spar half must match its mate both thickness den sity match strength us ing technique splicing two half-spars cut spar halves pairs side-by-side same sheet balsa Obviously raw spar halves must start same cross section Stan Chilton uses tapered guide sand ing block taper spars identical cross sections measured locations along blade final test needed assure equal strength two spar halves Spar testing Three photos show home made deflection-tester testing spar strength first photo trio shows raw spar ing tested deflection under load spar clamped left fixture adjustable scale set tip spar weight hung spar deflection noted second spar half compared first raw spars similar strength final match can made during sanding operation major dif ference point either balsa density varies sheet spars cut ac curately After sanding exact match spars spliced prop shaft tached remaining pair photos shows close-up details dolls miniature clothes pin clamp adjustable deflection scale Next time will detail spar assembly discuss lightweight props used micro film-covered models Also will some other prop tips before going other topics Down prop wobble Bud Tenny Box 545 Richardson TX 75080 Unfinished Business Back December 1985 issue author Bud Tenny commented aspects planning 1985 Nats Indoor schedule resulted dissatisfaction among some Indoor fliers lengthy editorial comment inserted Budes column point expressing point view differing Buds time Bud Tenny addressed letter editor wishing further explain thinking said inserted some editorial comment Indoor column December 1985 MA am con cemed some remarks will create basic misunderstanding nature Nats entry blank contractual nature entry blank highly beneficial both AMA con testant Having advance knowledge entry essential AMAs logistical support worlds largest complex modeling event Having advance knowledge event scheduling special conditions allows contestant plan own participation competition strategy comments mentioned fine-tuning resolve scheduling problems have officiated 15 Nats have seen fine-tuning action almost concept certainly new AMA does fine-tune given situation breaking June 1986 167 Name Street Address city StateZip Liiih.IAb ROLLw rLANS UT PARTS 1/2A FULL KIT $2795 y A-B FULL KIT3995 B-C-D PRO KIT4495 B-C-D FULL KIT5995 Tee Dee Back Plate Mount 500 Pacifieraea 50 Surgical Tubingloft 300 Shipping $250 ea order Shipping paid orders over $6000 PRE-PAY OR COD/CA RES ADD 6-1/2% TAX ASI S. s ract other contestants Lets review situation contestant enters Nats signs contract agreeing rules scheduling other conditions cannot logically legally object planning provisions no condi tional entry Ill enter fix Nats contestant doesnt enter because conditions obviously has no leverage correct either Whether like word boycott boycott refusal participate earlier column stated dissatisfied contestant has no choice except boycott event other choice enter agree conditions stated entry blank bright spot whole situation recent Nats planning session character ized unusually strong effort get input persons outside planning group As longtime Nats worker contestant Nats buff applaud effort FF Duration/Murphy Continued page 73 What really prompted curiosity trimmed-down diminutive size spoiler its original size obviously much larger evident size built-in depression wing itself Don said spoiler worked well its original size caused model dive like kamikaze kept trimming down until arrived acceptable descent rateand what see stopped whittling Very interesting say least Nats notes Dont get lulled trap assuming schedule official Free Fight events years AMA National Championships Lakes Charles LA will re main status quo recent years Some drastic manipulating event schedules take place year permit full two-day space end Nats-week some special 50th Nats Celebration events festivities Basically competition schedule provides three days Indoor activities beginning Saturday July 26and Outdoor events traditionally have commenced Tuesday will now start Monday July 28 thereby moving whole normal five-day Outdoor event schedule forward day winding up Friday August 1 results one-day overlap Indoor Outdoor events Monday need check Official Nats Schedule find favorite PRODUCTS FOR THE DISCERNING MODELER Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers Venturi Mufflers Expansion Mufflers Helicopter Ball Mufflers ialized Exhaust Systems Unsurpass LIh.k.eeAin h P4rfomance events copy Nats schedule print ed April 1986 Competition News letter' page 111 Terry Rimert has also advised NFFS Special Event program held conjunc tion official-event schedule events include Indoor Outdoor Ornithopter Helicopter Autogiro Unlimited Rubber Biplane Embryo Endur ance Mulvihill Team Korda Open Rubber Sig Mini-Maxer 7-Il Rubber Distance Rub ber Speed HLG Team Terry will looking volunteers aid timing directing above events keep sharp eye daily NFFS sponsored-event schedule drop around offer help should attending Number 50 Gotcha again Boss caught last column may remember closing com ments consisted backdoor introduction boss Associate Editor Ross McMullen situation came about because thinskinned refusal accept subject role safety pitch caption under photo yers trooly appeared co-columnist Bob Meusers previous editions Now let say editors go Ross quite nice fella first place editors receive positions because inherent friendly natures ability get along temperamental columnists Ross cer tainly fits mold Bob understand occasionally Ross may have trim out por tion reports should result being little lengthy should have space problem particular issue occurs can always depend prompt return unused portion plus accompanying apology invitation re-use clip next submittal should still remain appropriate other major liberty columnists permit editors reworking captions under photos submit normal practice columnist sub mit suggested caption photo ever should descriptive prose prove too wordy too short available page space editor turn will perform necessary literary surgery Unfortunately operations successful once again case previous column April issue find onebut twoplaces resultant scar tissue now requires some additional plastic surgery first place reference Ed Konefes Buzzard Bombshell man brother Joe Bombshell feller second misdemeanor oc 168 Model Aviation FSCALE MODEUNG * FOR GIANT SCALE BUFFSI -t 524 4 77W-Wnl2l Rod L $48 72 Car 02U1/4 L&S $45 - 84 Fakkr D7 F, 539 62 Hoorord Rare Ike 46 60 Horoord Poe 70 EayIa OeBee 532 103 Boa 0-170 Fort $55 60 SaperororinO S6B $24 68 Dnag 046A Ok $32 89 Saperorarina 066 $35oSikor 028 Anrptr $49 62 Ca t Norok P60 $42100 Sport$36 94 Ca H oak P6E F, $54 $foe 230 Sport $497 63Lockheed Vega $34 900rinALoor Wing $56 . ool trIo 0 B 11 $48 80 Martin 74 0dM-i $39 80 Hall Spr Rn dog $43 10$ HP0 $400 Boor $49 107 Aronoa C3 Spt $35r1 68 BOonanca VOoji $39 61 Dorgla 038 Ok 833 177 Laoonrke Sedan $25 132 Doagla 038 Ob$491 73 N AM ak Bomb $49 94 Fag Cart Rarer $45 65 M Mo aade 826049 71 Martin 81$ Boorb $29 81 08 Macqa B b $45 78 Tarnere W-W Boo $35 10808 Moaqa Boorb $55 64 Car Oookk 91 1C2 $43 98 Stea FTi7Koydet $56 ar Oookk_Ft1C2 $54 99 N Bk Wdoo P61 $69 .....A 6d12Hao Coorot Ear $34 7llloag OC3 Iran $32 62 Hoor Mr Matligoo 535195 Doag DC-s Tran $55 194 Ho Mr Malligan $45 86 Hoork Taooao 13 $32 Baerng F-26A Ftr $36 1108 Cor0251/4 L&S $56 ooo8 P-26A Ftr $4$I 60 000810 M2 Mail $24 64 Beorlr C17B Stag $38 59 BroornEaaoMLA $54 - 6 Bead C17B Stag $49 107 Gram Bearat FBF $54 69 Waaa C-6 Cakin $6 68 Brital Haildog Ftr $30 Eloatra $30 73 Tranal Air 6000 $24 82 Lark 11 Elertro $45 107 Mart MB-i Boor $44 62 Sinoo T/W 067 $16 $1 Lindkergo NO-Sit $39 4 81 Stinaao 5/W 087 $34 108 FairrkFTi9 $597 122115tinorr 0/W 087 $38 9dWaaa Taper-Wing $39 59 Brietal FIr P2-B $20 75 Woatid Lyaarder $32. 78 Britol Ptr P38 -.033100 Weerld Lycander $49 118 Brletal 92-B 7 Ford Triort 4-AT $38 IE Peeaa Spar$45776 Ford Triortr 4-AT $45 83 Skyrarket 09SF-i$24114 Ford Triortr 4-AT $59 3d Car Warkk F-dO$2484 BarI-Jayre OFJ2 $56B Lark Lightog P38 538 93 Loeoiog CSAorpk $69 56 Rep Sea-Bee Aor $24 50 GraorJ2-F Dark4 RpSeaB Aorplt $39 70 GraorJ2F Dark $56 106 Pipar J-3 Cak 03959 Gorka GiV Boor $22. ark Hadoo Bork $38 117 Gotha 0-tv Boor 039-63 Gram P6F Helirat $38 68 Bran-Winklo Bird $4555 Heatlr Baky Bolt $247 54 Cart Sorift SF934 $28 Nat Sold Okra DealerPria. eakiart okano Artoeretre rnrtrann oraenee eta atarn La or * OraridOT 50r Up 6-122 Part Aloray .. Add 10% order ekippmog & eta OSA Can & Meo Oleeorhere 15% 125% arri Firtoriol oatalao 5300 inrlade Prre Earl Pore tat atior alone 510$ a, farergo add $1 0$ LEVELANDMODEL&SUPPLYCo , aca t raOoaeaolrtlotao MC FROND tarE tt r OaOaCa praaorarle 103078 DETROIT AVE CLEVELAND OHIO U103 ararrrooarooatora hore 515 FMEST 9001 216 961 360$ OC0a earoaorr
Edition: Model Aviation - 1986/06
Page Numbers: 71, 167, 168
Free Flight Indoor Bud Tenny PROP STRUCTURE BASICS Prop-wobble due structural variations hardest prob lem spot fix Last time covered problems geometry blade angle twist alignment problems repairing working props remain wobble-free So get wobble-free prop begin lighter want prop harder make wobble-free Pennyplane P/P prop usually sturdy handle high power required drive three-gram model However prop world-class FAI Stick model typically will have much higher relative stress prop struc ture typical Pennyplane prop may weigh 021 oz driven 066 oz rubber ratio over 311 FAI prop may weigh 0065 oz rubber weight 036 oz55l ratio Both rubber loops may similar length P/P launch torque could twice high FAt unlimited-ceiling site Prop flare Since typical P/P prop has sheet balsa blades spar full torque prob ably wont deflect structure noticeably FAI prop built-up structure larger diameter blade area P/P structure will distort obviously quite bit under full torque structural geometry blade P/P prop matched should run properly After careful repairs damaged prop should continue work well Contrary ideas held some people weight imbalance between blades Indoor prop will have small effect compared dif ferences blade angle twist shaft misalignment about lighter props next lightest props Easy B props required balsa Competition-grade Easy B models very light props will delicate enough require unusual care during con struction spars must matched exactly described below blades must closely matched Good blade-matching Easy B requires following steps 1 Select sheet wood prop blades will cut maximum uniformi ty thickness density across entire sheet Measure thickness calipers several places along both sides sheet 2 Balance sheet check uniformity balsa density balance point center sheet uniform density 3 Inspect grain sheet using light table making sure grain completely uniform dont have light table place balsa against outside window use daylight view grain 4 If grain balsa isnt parallel edge sheet align blade templates grain grain parallel blade centerline 5 When blades cut out weigh blade sure matched As blades sanded tapered final shape monitor both thickness weight keep blades matched Use very fine sandpaper work slowly avoid removing too much wood anywhere 6 Use non-shrinking glue build prop assembly fixture special glue prevents warping thin wood glue dries fixture assures correct alignment photo shows Stan Chiltons Easy B prop block blades formed simultaneously block assembled shaft/spar combo blade time prop ever needs repair block should used assure correct alignment during repairs Chiltons prop block basic details Stans Easy B prop block shown photo center block has provision centering spar right height hold ing prop shaft vertically first blade attached spar rotated attach second blade prop shaft truly ver tical blades will have same pitch after assembly Stan makes standard block carves recess slightly larger blade leaving support spar middle recess recess correct depth spar will fit exactly under cambered blade leave spar straight carves cambered filler desired airfoil cuts slot spar result bottom half mold shape blade twist camber other half mold shown below Continued page 167 June 1986 71 Stan Chiltons Easy B prop blank blade mold Photo Chilton info column prop spar being deflection-tested Above assure both sides have equal strength stiffness before attaching blades loop solder being used test weight spar clamped testing fixture Near Right made balsa dolls clothespin deflection scale Far Right can adjusted up down tip test spar before weight applied Photos Bud Tenny presently being constructed very few changes first certainly hope article Envoy will help some way increase interest activity Con trol Line Precision Aerobatics etched stone will making changes discover problems need solved Join PAMPA take few contests expert flier area Remember expert began novice flier Enjoy sport will find time activity will improve personal flying building expertise FF Indoor/Tenny Continued page 71 prop block consists YI6-in rubber foam exactly blade-shaped epoxied dummy blade made Vio-in balsa having required twist camber Both new blade blanks clamped inside mold form twist camber Prop assembly After finishes sanding tapering blade blanks Stan soaks warm water 30 minutes Three pieces Japanese tissue cut 7-in larger blades first tissue layer goes bottom half mold first blade placed tissue covered second piece tissue second blade laid covered third tissue Finally top mold foam rubber next tissue/blade sandwich strapped place rubberbands whole assembly baked oven about 175 0F result finished prop no raised grain Apparently tissue clamping prevent raised grain blades resulting water-soaking careful avoid damaging finished blades removing mold wire inserted spar slot can used separate blades block necessary blades can separated easily Stan thins glue retarder lacquer thin ner make slow-drying glue applies fine-tipped brush glues spar lAThES ING MACNINIS INE SHOP SUPPLIES Aoation Modeler MACHINERY AN) TOOLS INC Coil roll free 1-800872-6500RepreEHHtUtIeHS WV 1-502-3538Many MH1EHfHCIWHFS P0 Boo 530-V Horriceon WV 25520 Catalep $100 Over 200 PONHE SILICONE TUBING lOft28 ft50 ft SMALL 062 dl. $200 MED 1092 dI.I $400 SHOe $1600 LANGE 126 dl. $500 $1 125 02000 US $ CAN POSTPAID DOP6E diR 0 INC 10210 MannIng Ave N Shllwater MN 55082 SCALE DOCUMENTATION WORLDS LARGEST COLLECTION Color FOTO PAAKSKOKUFAN 3oiews 36000In 100k2000 20 04ev CATALOG 52005180 SASSSCALE MODEL AESEARCH SatOlaoIrOn418 E Oceantronl M GuareeteedNewport Beach Caltorera 9255 1 either tip root blade first applies glue top edge spar brush clamps blade place top mold until glue dry Prop spars Since spar must absorb rubber energy side must same stiffness keep prop correct align ment weak damaged spar will change blade geometry under load causing prop wobble Again wood spar half must match its mate both thickness den sity match strength us ing technique splicing two half-spars cut spar halves pairs side-by-side same sheet balsa Obviously raw spar halves must start same cross section Stan Chilton uses tapered guide sand ing block taper spars identical cross sections measured locations along blade final test needed assure equal strength two spar halves Spar testing Three photos show home made deflection-tester testing spar strength first photo trio shows raw spar ing tested deflection under load spar clamped left fixture adjustable scale set tip spar weight hung spar deflection noted second spar half compared first raw spars similar strength final match can made during sanding operation major dif ference point either balsa density varies sheet spars cut ac curately After sanding exact match spars spliced prop shaft tached remaining pair photos shows close-up details dolls miniature clothes pin clamp adjustable deflection scale Next time will detail spar assembly discuss lightweight props used micro film-covered models Also will some other prop tips before going other topics Down prop wobble Bud Tenny Box 545 Richardson TX 75080 Unfinished Business Back December 1985 issue author Bud Tenny commented aspects planning 1985 Nats Indoor schedule resulted dissatisfaction among some Indoor fliers lengthy editorial comment inserted Budes column point expressing point view differing Buds time Bud Tenny addressed letter editor wishing further explain thinking said inserted some editorial comment Indoor column December 1985 MA am con cemed some remarks will create basic misunderstanding nature Nats entry blank contractual nature entry blank highly beneficial both AMA con testant Having advance knowledge entry essential AMAs logistical support worlds largest complex modeling event Having advance knowledge event scheduling special conditions allows contestant plan own participation competition strategy comments mentioned fine-tuning resolve scheduling problems have officiated 15 Nats have seen fine-tuning action almost concept certainly new AMA does fine-tune given situation breaking June 1986 167 Name Street Address city StateZip Liiih.IAb ROLLw rLANS UT PARTS 1/2A FULL KIT $2795 y A-B FULL KIT3995 B-C-D PRO KIT4495 B-C-D FULL KIT5995 Tee Dee Back Plate Mount 500 Pacifieraea 50 Surgical Tubingloft 300 Shipping $250 ea order Shipping paid orders over $6000 PRE-PAY OR COD/CA RES ADD 6-1/2% TAX ASI S. s ract other contestants Lets review situation contestant enters Nats signs contract agreeing rules scheduling other conditions cannot logically legally object planning provisions no condi tional entry Ill enter fix Nats contestant doesnt enter because conditions obviously has no leverage correct either Whether like word boycott boycott refusal participate earlier column stated dissatisfied contestant has no choice except boycott event other choice enter agree conditions stated entry blank bright spot whole situation recent Nats planning session character ized unusually strong effort get input persons outside planning group As longtime Nats worker contestant Nats buff applaud effort FF Duration/Murphy Continued page 73 What really prompted curiosity trimmed-down diminutive size spoiler its original size obviously much larger evident size built-in depression wing itself Don said spoiler worked well its original size caused model dive like kamikaze kept trimming down until arrived acceptable descent rateand what see stopped whittling Very interesting say least Nats notes Dont get lulled trap assuming schedule official Free Fight events years AMA National Championships Lakes Charles LA will re main status quo recent years Some drastic manipulating event schedules take place year permit full two-day space end Nats-week some special 50th Nats Celebration events festivities Basically competition schedule provides three days Indoor activities beginning Saturday July 26and Outdoor events traditionally have commenced Tuesday will now start Monday July 28 thereby moving whole normal five-day Outdoor event schedule forward day winding up Friday August 1 results one-day overlap Indoor Outdoor events Monday need check Official Nats Schedule find favorite PRODUCTS FOR THE DISCERNING MODELER Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers Venturi Mufflers Expansion Mufflers Helicopter Ball Mufflers ialized Exhaust Systems Unsurpass LIh.k.eeAin h P4rfomance events copy Nats schedule print ed April 1986 Competition News letter' page 111 Terry Rimert has also advised NFFS Special Event program held conjunc tion official-event schedule events include Indoor Outdoor Ornithopter Helicopter Autogiro Unlimited Rubber Biplane Embryo Endur ance Mulvihill Team Korda Open Rubber Sig Mini-Maxer 7-Il Rubber Distance Rub ber Speed HLG Team Terry will looking volunteers aid timing directing above events keep sharp eye daily NFFS sponsored-event schedule drop around offer help should attending Number 50 Gotcha again Boss caught last column may remember closing com ments consisted backdoor introduction boss Associate Editor Ross McMullen situation came about because thinskinned refusal accept subject role safety pitch caption under photo yers trooly appeared co-columnist Bob Meusers previous editions Now let say editors go Ross quite nice fella first place editors receive positions because inherent friendly natures ability get along temperamental columnists Ross cer tainly fits mold Bob understand occasionally Ross may have trim out por tion reports should result being little lengthy should have space problem particular issue occurs can always depend prompt return unused portion plus accompanying apology invitation re-use clip next submittal should still remain appropriate other major liberty columnists permit editors reworking captions under photos submit normal practice columnist sub mit suggested caption photo ever should descriptive prose prove too wordy too short available page space editor turn will perform necessary literary surgery Unfortunately operations successful once again case previous column April issue find onebut twoplaces resultant scar tissue now requires some additional plastic surgery first place reference Ed Konefes Buzzard Bombshell man brother Joe Bombshell feller second misdemeanor oc 168 Model Aviation FSCALE MODEUNG * FOR GIANT SCALE BUFFSI -t 524 4 77W-Wnl2l Rod L $48 72 Car 02U1/4 L&S $45 - 84 Fakkr D7 F, 539 62 Hoorord Rare Ike 46 60 Horoord Poe 70 EayIa OeBee 532 103 Boa 0-170 Fort $55 60 SaperororinO S6B $24 68 Dnag 046A Ok $32 89 Saperorarina 066 $35oSikor 028 Anrptr $49 62 Ca t Norok P60 $42100 Sport$36 94 Ca H oak P6E F, $54 $foe 230 Sport $497 63Lockheed Vega $34 900rinALoor Wing $56 . ool trIo 0 B 11 $48 80 Martin 74 0dM-i $39 80 Hall Spr Rn dog $43 10$ HP0 $400 Boor $49 107 Aronoa C3 Spt $35r1 68 BOonanca VOoji $39 61 Dorgla 038 Ok 833 177 Laoonrke Sedan $25 132 Doagla 038 Ob$491 73 N AM ak Bomb $49 94 Fag Cart Rarer $45 65 M Mo aade 826049 71 Martin 81$ Boorb $29 81 08 Macqa B b $45 78 Tarnere W-W Boo $35 10808 Moaqa Boorb $55 64 Car Oookk 91 1C2 $43 98 Stea FTi7Koydet $56 ar Oookk_Ft1C2 $54 99 N Bk Wdoo P61 $69 .....A 6d12Hao Coorot Ear $34 7llloag OC3 Iran $32 62 Hoor Mr Matligoo 535195 Doag DC-s Tran $55 194 Ho Mr Malligan $45 86 Hoork Taooao 13 $32 Baerng F-26A Ftr $36 1108 Cor0251/4 L&S $56 ooo8 P-26A Ftr $4$I 60 000810 M2 Mail $24 64 Beorlr C17B Stag $38 59 BroornEaaoMLA $54 - 6 Bead C17B Stag $49 107 Gram Bearat FBF $54 69 Waaa C-6 Cakin $6 68 Brital Haildog Ftr $30 Eloatra $30 73 Tranal Air 6000 $24 82 Lark 11 Elertro $45 107 Mart MB-i Boor $44 62 Sinoo T/W 067 $16 $1 Lindkergo NO-Sit $39 4 81 Stinaao 5/W 087 $34 108 FairrkFTi9 $597 122115tinorr 0/W 087 $38 9dWaaa Taper-Wing $39 59 Brietal FIr P2-B $20 75 Woatid Lyaarder $32. 78 Britol Ptr P38 -.033100 Weerld Lycander $49 118 Brletal 92-B 7 Ford Triort 4-AT $38 IE Peeaa Spar$45776 Ford Triortr 4-AT $45 83 Skyrarket 09SF-i$24114 Ford Triortr 4-AT $59 3d Car Warkk F-dO$2484 BarI-Jayre OFJ2 $56B Lark Lightog P38 538 93 Loeoiog CSAorpk $69 56 Rep Sea-Bee Aor $24 50 GraorJ2-F Dark4 RpSeaB Aorplt $39 70 GraorJ2F Dark $56 106 Pipar J-3 Cak 03959 Gorka GiV Boor $22. ark Hadoo Bork $38 117 Gotha 0-tv Boor 039-63 Gram P6F Helirat $38 68 Bran-Winklo Bird $4555 Heatlr Baky Bolt $247 54 Cart Sorift SF934 $28 Nat Sold Okra DealerPria. eakiart okano Artoeretre rnrtrann oraenee eta atarn La or * OraridOT 50r Up 6-122 Part Aloray .. 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