INDOOR Bud Tenny ITS YOUR responsibility number fliers quite upset found out what new Easy B rules make matters worse 1980 AMA Rule Book didnt come out until very late someone wishing CD contest June decision made about whether hold two Easy B events definite problem Discussions friends about contests held date left confused about exactly what new Easy B rules realized rules adopted FF Contest Board supposed have published ModelAviation several searches mess referred office failed locate proper issue Finally able get copy final FFCB submission Chris Matsuno barely managed get sanction NIMAS VNART sent Only Herculean effort AMA HQ Contest Coordinator got documentation time So what went wrong As AMA CD responsibility review Competition News sections ModelAviation abreast rules changes enacted As contestant interested rules might fly under 1980 responsibility interact Dist VIII Free Flight Contest Board representative during rules-making procedure giving him feedback what thought should various proposals rules-making procedure progressed Actually blew several opportuni ties ignored preliminary proposals cross-proposals final vote really toes opposed new Easy B rules could possibly have stopped whole thing presenting good enough case against original proposal however kept quiet barely noticed original proposal accepted consideration proceeded totally ignore whole cross-proposal situation As turned out final rule now have live until January 1982 product cross-proposal basic proposal So whats next Well look back October 1980 MA Competition Newsletter section lists great number Free Flight rules proposals eight Indoor Preliminary proposals proposals get enough votes accepted die vine speak FF Contest Board must vote proposals sometime December 1980 may see comments until after despair Continue watch Competition Newsletter section wait proposals survive initial vote published again will have opportunity counsel FFCB representative time must also watchforcmss-proposals may drastically modi proposals originally liked Cross-proposals may also change proposal didnt like OK can also submit own crossproposals instructions will published along some rules proposals See article Contest Board procedures Augnst 1980 Competition Newsletter sec tion MA vigilant speak up writing Lets Fly Although have number contests held during summer including NIMAS VNART Nats US Indoor fliers dont get chance limber up models until snow flies whatever passes winter area has practice list contests flying sessions held anywhere US far CD has let know about winter schedule Miami FL Miami Indoor Airplane Modelers Association MIAMA has annonced entire 1980 flying season Note dates consid Continued page 121 Fietd repairs Buds portable assembly/bracing/repair jigs support broken model proper alignment repair built-up tail boom break ahead stab photos Tenny center section braced Bud moves jigs out tip utuuns install dihedral tip bracing Bud using adjustable supportsto fold tnewing properalignment attaching cabane/wing-post assembly eading edge actuallya tiny narrow balsa peg glued lengthwu u makes excellent anchor bracing wire January 1981 51 etc Send em buck pleasantly surprised Lest forget gumband-twisters longtime favorite Peck-Polymers has complete line nifty goodies anywhere FF Scale devotee ranging 1/20 square balsa sticks exciting Peanut plans kits anywhere world cant get excited Peck catalog should making RC tanks time magazine gets new attrac tion Butch Hadland Peanut Lacey kit will shelves Take Uncle Bill will winner beginner devaluated dollar PO Box 2498 La Mesa CA 92041 will get catalog No 22 Bill Warner 423-C San Vicente Blvd Santa Monica CA 90402 FF Indoor/Tenny Con finued page 51 esed firm last-minute circumstances can alter own convenience confirm dates day before meet calling 305 858-6363 contestdates Nov 16 Dec 14 1980 Jan 18 Feb 15 Mar 15 April 19 May 17 1981 MIAMA has lost access Goodyear blimp hangar Opa Locka Airport contest reverts Cat status since site 28-ft gymnasium Miami Dade South College new contest venue no longer has HLG Paper Stick now includes Old-Time Baby ROG gem event uses 1930 ALMA rules Motor stick 8-in long maximum rubber loop 10-in long maximum two -in diameter minimum wheels turn model must papercovered Just reminder Since almost time contest season start should thinking about repairs modelsbefore first contest opens past experience can remember little enough time re trim models compensate warps have accumulated over summer add repair time already-crowded schedule may well lose default since models wont up snuff Suppose forget Thats what usually remember take all-purpose repair jigs contest no matter what set jigs modular can easily carried box lOx 14 x 2-in used mostly home assemble motor stick components attach tail booms tail surfaces fuselage assembly brace tail surfaces assemble brace wings short whole model assembly job Since various parts modular easily carried really little excuse carry along contest photos shows three components field repair situation look closely model stands will note built-up tail boom subject future discussion fractured about inch ahead stab So two rear stands supporting tail group stub tail boom fuselage being supported another stand use First flat surface top model box case located Next primary jig fuselage cradle securely taped surface motor stick anchored using crossed straight pins hold place Since repairjob two adjustable stands located approximately correct location tail group placed stab anchored straight pins angle Note usually evident thin balsa Indoor r Q~ LOCK OF THE CENTURY .AND THIS IS IT Hidden behind prop inside spinner lies innovative spinner lock ing device yet achieved beautiful piece nose cone fits over back plate positively locked sliding hidden locking ring behind prop inside spinner small screwdriver nose cone effortlessly pulls off disengaged put back equal ease seconds NO BOLTS THREADS SCREWS SLOTS OR TABS NO MORE PARTING LINES TO COLLECT DIRT NO BLEMISHES OR VISIBLE BACK PLATES EASY ON. EASY OFF NO MORE HURTING PALMS OR DAMAGED AIRPLANES FROM TRYING TOSLAPTHAT Four locking lugs hold spinner tight Made space age polycar bonate spinners practically unbreakable affected hot cold temperatures OTHER SPINNER ON NOSE CON LOCK NO P NO HO ACES 0 LOCK NOSE COSEI PROP SPA B 7 SIZES 2- 2-GA 3Dia 4 COLORS MATCHED TO MONOKOTE RED WHITE BLACK & YELLOW NO DRILLING Four adapter rings included fit engine shaft sizes WORKS PERFECTLY WITH ELECTRIC STARTERS PRICES FROM 250-400 PATENT PENDING PRo0 RO PRODUCTS INCORPORATED Bonner Road Wauconda Illinois 60084 USA January1981 121 * MOST STREAMLINED * COOL RUNNING * COMPUTED FOR YOUR ENGINE * NOTHING TO ADJUST * NO STRAPS NT FALL OFF * TAPPED FOR MUFFLER PRESSURE * LIGHT WEIGHT. 19 46 size approx 3/4 oz 50 90 size approx 1-1/2 oz * PROVEN IN NATIONAL COMPETITION LOWEST POWER LOSS PRICE $2000 POSTAGE & HANDLING 0 OHIO RESIDENTS ADDL SALES TAX 0 K & B 40 BAFFLE ADAPTERS AVAILABLE . AND STILL NO UNSIGHTLY STRAPSI ONLY $200 ADDITIONAL ROBERT PAUL PREPAID CHECK OR1482 ORCHARD GROVE MONEY ORDER TOLAKEWOOD OHIO 44107 SCS frames must anchored sticking pins through wood However possible purchase insect mounting pins tempered steel have diameter about 009-in sharp slide between wood fibersnd no damage necessary anchor stab fasten support time Otherwise may shatter stab alignment phase follows Note two rear stands individ ually adjustable height tilt Although process alignment tedious possible precisely align broken ends boom struts can butt-glued So move thing time until correct alignment achieved glue ends together Allow joint dry thoroughly apply thin parallel splint piece bridge joint What else can jigs Two other photos show wing two stages brac ing first wing being fastened cabane/wing post assembly sup ported same mounting block wing will use stored model box First cabane structure erected mount block taped work board Note board fastened table can rotated easy access either side wing board straight flat can used reference measure alignment during bracing operation other photo t l-tUl AND LAX I-Al-l WITH BEST QUALITY WING BAGS YOUR CHOICE OF COLORS PATTERNS LOGOS HEAYY WATERPROOF NYLON CLOTH THICK BLACK FOAM INTERNAL PADDING IA RAPA ROUND ZIPPER 2 PULLS ENTIRELY DOUBLE STITCHED INTERNAL POCKETS FOR STABILIZERS GREAT PROTECTION FOR ANY MODEL WING SEND S SE FOR FULL DETAILS SLOPE ASSOCIATES 2317 N 63RD SEATTLE WASHINGTON 98103 Jacli Arnhstrengs American P-40 a Japanese Zero Authentic Semi-Scale Reprints OualiRy card Stock Remember Well Flew just left right sides plan indicates tried after Upstart 4 built results looked good Also dont skimp stabilizer scoff reinforcing lightly stressed member take good look stabilizer has some carbon launch photo After seeing tripled carbon subsequent stabilizers Flying Add lead nose bring CG just behind position indicated plans fine-trim clay slow glide glider very sensitive CG shifts goes stall dive slightest provocation add some clay up elevator increase static stability margln thrown hard horizontally Upstart 4 should show no diving looping tendencies wants ioop remove clay add down stab decrease stab area wants dive add clay up increase stab area Keep mind looping tendencies can also result overly flexible flaps diving tendencies can result stiff flaps and/or overly flexible stab Small changes CG will still necessary fine-tuning glide have heard lot conflicting opinions what makes breaks transition climb glide opinions observations follows First rudder should small possiblejust big enough prevent wandering glide big rudder will make glider fly though rails prevent rapid yawing motion flip glide peak trajectory Sufficient dihedral also essential flip Other factors help having draggier right wing wider chord aCG slightly left centerline Sometimes extra right-rudder deflec tion together left tip weight necessary Some other problems often cause poor transitions poor launch over weight extremities CG too far back uninten tional flexing fuselage flying surfaces latter usually manifests itself erratic climbs well Fine-trimming glider does consist urn 5500merely adjusting nose weight until glider flies just short stall speed very important thing watch out premature stall either wing tip can prevent rest wing reaching its optimum lift coefficient thereby limiting performance glider people realize manner glider stalls can give great deal information premature stall instance does glider execute sharp turn right assuming right glide during stall sure sign right wing tip stalling pre maturely pulling glider around due extra drag Likewise stall left wing tip produces momentary tendency fly straight little left far best way delay wing tip stall droop leading edge careful bending Raising trailing edge instead often ineffective since reduces airfoil thickness maximum lift coefficient obtain able Anyway wing tips should tweaked produce stall causes no departure glide circle optimum glide trim itself can determined stopwatch glider best times resulted flying slightly faster slowest speed obtainable As final word should point out HL Glider Indoor event requires practice best glider contest will generally outfly competition flier inexperienced completely unfamiliar glider reason serious competitor should practice much possible allows him wring last second out primary bracing has installed dihedral tip bracing being added last photo shows typical wire mounting peg installed wing leading trailing edges wherever wires will attach framework reason using long skinny piece glued lengthwise glue applied anchorthe wire will soften joint anchoring peg Also need adjust bracing later small amount thinner will allow loosen wire disturbing peg Bud Tenny P0 Box 545 Richardson TX 75080 Upstart 4/Drela Continued page 54 Under no circumstances should piece subjected flexing during time since cement soft weak some delamination will likely occur will probably spots no cement applied didnt soak through balsa after drying flex piece lightly observing compression side fibers popping off Eliminate defects applying very thin cement wiping off excess Id like recommend apply carbon fiber four sides fuselage instead 122 Model Aviation REPUBLIC SEABEE o MR Gs PRODUCTS 1100 Michigan Box 161 Marysville MI 48040 Wing Span 78 complete Hardware Epoxy Glass Retractable Gear 40 PoweredA Factors N ON REAR NGS BROWN CO 2 ENG NE5 IIE'lIitSII REA APANESE 5555 PROPS 175PAN i4COMPLETE CATALOG $1 00 MAN HARD OF NO EMS Pech-PeIpmes W BOX 2498 AM LA MESA CALII 92041
Edition: Model Aviation - 1981/01
Page Numbers: 51, 121, 122
INDOOR Bud Tenny ITS YOUR responsibility number fliers quite upset found out what new Easy B rules make matters worse 1980 AMA Rule Book didnt come out until very late someone wishing CD contest June decision made about whether hold two Easy B events definite problem Discussions friends about contests held date left confused about exactly what new Easy B rules realized rules adopted FF Contest Board supposed have published ModelAviation several searches mess referred office failed locate proper issue Finally able get copy final FFCB submission Chris Matsuno barely managed get sanction NIMAS VNART sent Only Herculean effort AMA HQ Contest Coordinator got documentation time So what went wrong As AMA CD responsibility review Competition News sections ModelAviation abreast rules changes enacted As contestant interested rules might fly under 1980 responsibility interact Dist VIII Free Flight Contest Board representative during rules-making procedure giving him feedback what thought should various proposals rules-making procedure progressed Actually blew several opportuni ties ignored preliminary proposals cross-proposals final vote really toes opposed new Easy B rules could possibly have stopped whole thing presenting good enough case against original proposal however kept quiet barely noticed original proposal accepted consideration proceeded totally ignore whole cross-proposal situation As turned out final rule now have live until January 1982 product cross-proposal basic proposal So whats next Well look back October 1980 MA Competition Newsletter section lists great number Free Flight rules proposals eight Indoor Preliminary proposals proposals get enough votes accepted die vine speak FF Contest Board must vote proposals sometime December 1980 may see comments until after despair Continue watch Competition Newsletter section wait proposals survive initial vote published again will have opportunity counsel FFCB representative time must also watchforcmss-proposals may drastically modi proposals originally liked Cross-proposals may also change proposal didnt like OK can also submit own crossproposals instructions will published along some rules proposals See article Contest Board procedures Augnst 1980 Competition Newsletter sec tion MA vigilant speak up writing Lets Fly Although have number contests held during summer including NIMAS VNART Nats US Indoor fliers dont get chance limber up models until snow flies whatever passes winter area has practice list contests flying sessions held anywhere US far CD has let know about winter schedule Miami FL Miami Indoor Airplane Modelers Association MIAMA has annonced entire 1980 flying season Note dates consid Continued page 121 Fietd repairs Buds portable assembly/bracing/repair jigs support broken model proper alignment repair built-up tail boom break ahead stab photos Tenny center section braced Bud moves jigs out tip utuuns install dihedral tip bracing Bud using adjustable supportsto fold tnewing properalignment attaching cabane/wing-post assembly eading edge actuallya tiny narrow balsa peg glued lengthwu u makes excellent anchor bracing wire January 1981 51 etc Send em buck pleasantly surprised Lest forget gumband-twisters longtime favorite Peck-Polymers has complete line nifty goodies anywhere FF Scale devotee ranging 1/20 square balsa sticks exciting Peanut plans kits anywhere world cant get excited Peck catalog should making RC tanks time magazine gets new attrac tion Butch Hadland Peanut Lacey kit will shelves Take Uncle Bill will winner beginner devaluated dollar PO Box 2498 La Mesa CA 92041 will get catalog No 22 Bill Warner 423-C San Vicente Blvd Santa Monica CA 90402 FF Indoor/Tenny Con finued page 51 esed firm last-minute circumstances can alter own convenience confirm dates day before meet calling 305 858-6363 contestdates Nov 16 Dec 14 1980 Jan 18 Feb 15 Mar 15 April 19 May 17 1981 MIAMA has lost access Goodyear blimp hangar Opa Locka Airport contest reverts Cat status since site 28-ft gymnasium Miami Dade South College new contest venue no longer has HLG Paper Stick now includes Old-Time Baby ROG gem event uses 1930 ALMA rules Motor stick 8-in long maximum rubber loop 10-in long maximum two -in diameter minimum wheels turn model must papercovered Just reminder Since almost time contest season start should thinking about repairs modelsbefore first contest opens past experience can remember little enough time re trim models compensate warps have accumulated over summer add repair time already-crowded schedule may well lose default since models wont up snuff Suppose forget Thats what usually remember take all-purpose repair jigs contest no matter what set jigs modular can easily carried box lOx 14 x 2-in used mostly home assemble motor stick components attach tail booms tail surfaces fuselage assembly brace tail surfaces assemble brace wings short whole model assembly job Since various parts modular easily carried really little excuse carry along contest photos shows three components field repair situation look closely model stands will note built-up tail boom subject future discussion fractured about inch ahead stab So two rear stands supporting tail group stub tail boom fuselage being supported another stand use First flat surface top model box case located Next primary jig fuselage cradle securely taped surface motor stick anchored using crossed straight pins hold place Since repairjob two adjustable stands located approximately correct location tail group placed stab anchored straight pins angle Note usually evident thin balsa Indoor r Q~ LOCK OF THE CENTURY .AND THIS IS IT Hidden behind prop inside spinner lies innovative spinner lock ing device yet achieved beautiful piece nose cone fits over back plate positively locked sliding hidden locking ring behind prop inside spinner small screwdriver nose cone effortlessly pulls off disengaged put back equal ease seconds NO BOLTS THREADS SCREWS SLOTS OR TABS NO MORE PARTING LINES TO COLLECT DIRT NO BLEMISHES OR VISIBLE BACK PLATES EASY ON. EASY OFF NO MORE HURTING PALMS OR DAMAGED AIRPLANES FROM TRYING TOSLAPTHAT Four locking lugs hold spinner tight Made space age polycar bonate spinners practically unbreakable affected hot cold temperatures OTHER SPINNER ON NOSE CON LOCK NO P NO HO ACES 0 LOCK NOSE COSEI PROP SPA B 7 SIZES 2- 2-GA 3Dia 4 COLORS MATCHED TO MONOKOTE RED WHITE BLACK & YELLOW NO DRILLING Four adapter rings included fit engine shaft sizes WORKS PERFECTLY WITH ELECTRIC STARTERS PRICES FROM 250-400 PATENT PENDING PRo0 RO PRODUCTS INCORPORATED Bonner Road Wauconda Illinois 60084 USA January1981 121 * MOST STREAMLINED * COOL RUNNING * COMPUTED FOR YOUR ENGINE * NOTHING TO ADJUST * NO STRAPS NT FALL OFF * TAPPED FOR MUFFLER PRESSURE * LIGHT WEIGHT. 19 46 size approx 3/4 oz 50 90 size approx 1-1/2 oz * PROVEN IN NATIONAL COMPETITION LOWEST POWER LOSS PRICE $2000 POSTAGE & HANDLING 0 OHIO RESIDENTS ADDL SALES TAX 0 K & B 40 BAFFLE ADAPTERS AVAILABLE . AND STILL NO UNSIGHTLY STRAPSI ONLY $200 ADDITIONAL ROBERT PAUL PREPAID CHECK OR1482 ORCHARD GROVE MONEY ORDER TOLAKEWOOD OHIO 44107 SCS frames must anchored sticking pins through wood However possible purchase insect mounting pins tempered steel have diameter about 009-in sharp slide between wood fibersnd no damage necessary anchor stab fasten support time Otherwise may shatter stab alignment phase follows Note two rear stands individ ually adjustable height tilt Although process alignment tedious possible precisely align broken ends boom struts can butt-glued So move thing time until correct alignment achieved glue ends together Allow joint dry thoroughly apply thin parallel splint piece bridge joint What else can jigs Two other photos show wing two stages brac ing first wing being fastened cabane/wing post assembly sup ported same mounting block wing will use stored model box First cabane structure erected mount block taped work board Note board fastened table can rotated easy access either side wing board straight flat can used reference measure alignment during bracing operation other photo t l-tUl AND LAX I-Al-l WITH BEST QUALITY WING BAGS YOUR CHOICE OF COLORS PATTERNS LOGOS HEAYY WATERPROOF NYLON CLOTH THICK BLACK FOAM INTERNAL PADDING IA RAPA ROUND ZIPPER 2 PULLS ENTIRELY DOUBLE STITCHED INTERNAL POCKETS FOR STABILIZERS GREAT PROTECTION FOR ANY MODEL WING SEND S SE FOR FULL DETAILS SLOPE ASSOCIATES 2317 N 63RD SEATTLE WASHINGTON 98103 Jacli Arnhstrengs American P-40 a Japanese Zero Authentic Semi-Scale Reprints OualiRy card Stock Remember Well Flew just left right sides plan indicates tried after Upstart 4 built results looked good Also dont skimp stabilizer scoff reinforcing lightly stressed member take good look stabilizer has some carbon launch photo After seeing tripled carbon subsequent stabilizers Flying Add lead nose bring CG just behind position indicated plans fine-trim clay slow glide glider very sensitive CG shifts goes stall dive slightest provocation add some clay up elevator increase static stability margln thrown hard horizontally Upstart 4 should show no diving looping tendencies wants ioop remove clay add down stab decrease stab area wants dive add clay up increase stab area Keep mind looping tendencies can also result overly flexible flaps diving tendencies can result stiff flaps and/or overly flexible stab Small changes CG will still necessary fine-tuning glide have heard lot conflicting opinions what makes breaks transition climb glide opinions observations follows First rudder should small possiblejust big enough prevent wandering glide big rudder will make glider fly though rails prevent rapid yawing motion flip glide peak trajectory Sufficient dihedral also essential flip Other factors help having draggier right wing wider chord aCG slightly left centerline Sometimes extra right-rudder deflec tion together left tip weight necessary Some other problems often cause poor transitions poor launch over weight extremities CG too far back uninten tional flexing fuselage flying surfaces latter usually manifests itself erratic climbs well Fine-trimming glider does consist urn 5500merely adjusting nose weight until glider flies just short stall speed very important thing watch out premature stall either wing tip can prevent rest wing reaching its optimum lift coefficient thereby limiting performance glider people realize manner glider stalls can give great deal information premature stall instance does glider execute sharp turn right assuming right glide during stall sure sign right wing tip stalling pre maturely pulling glider around due extra drag Likewise stall left wing tip produces momentary tendency fly straight little left far best way delay wing tip stall droop leading edge careful bending Raising trailing edge instead often ineffective since reduces airfoil thickness maximum lift coefficient obtain able Anyway wing tips should tweaked produce stall causes no departure glide circle optimum glide trim itself can determined stopwatch glider best times resulted flying slightly faster slowest speed obtainable As final word should point out HL Glider Indoor event requires practice best glider contest will generally outfly competition flier inexperienced completely unfamiliar glider reason serious competitor should practice much possible allows him wring last second out primary bracing has installed dihedral tip bracing being added last photo shows typical wire mounting peg installed wing leading trailing edges wherever wires will attach framework reason using long skinny piece glued lengthwise glue applied anchorthe wire will soften joint anchoring peg Also need adjust bracing later small amount thinner will allow loosen wire disturbing peg Bud Tenny P0 Box 545 Richardson TX 75080 Upstart 4/Drela Continued page 54 Under no circumstances should piece subjected flexing during time since cement soft weak some delamination will likely occur will probably spots no cement applied didnt soak through balsa after drying flex piece lightly observing compression side fibers popping off Eliminate defects applying very thin cement wiping off excess Id like recommend apply carbon fiber four sides fuselage instead 122 Model Aviation REPUBLIC SEABEE o MR Gs PRODUCTS 1100 Michigan Box 161 Marysville MI 48040 Wing Span 78 complete Hardware Epoxy Glass Retractable Gear 40 PoweredA Factors N ON REAR NGS BROWN CO 2 ENG NE5 IIE'lIitSII REA APANESE 5555 PROPS 175PAN i4COMPLETE CATALOG $1 00 MAN HARD OF NO EMS Pech-PeIpmes W BOX 2498 AM LA MESA CALII 92041
Edition: Model Aviation - 1981/01
Page Numbers: 51, 121, 122
INDOOR Bud Tenny ITS YOUR responsibility number fliers quite upset found out what new Easy B rules make matters worse 1980 AMA Rule Book didnt come out until very late someone wishing CD contest June decision made about whether hold two Easy B events definite problem Discussions friends about contests held date left confused about exactly what new Easy B rules realized rules adopted FF Contest Board supposed have published ModelAviation several searches mess referred office failed locate proper issue Finally able get copy final FFCB submission Chris Matsuno barely managed get sanction NIMAS VNART sent Only Herculean effort AMA HQ Contest Coordinator got documentation time So what went wrong As AMA CD responsibility review Competition News sections ModelAviation abreast rules changes enacted As contestant interested rules might fly under 1980 responsibility interact Dist VIII Free Flight Contest Board representative during rules-making procedure giving him feedback what thought should various proposals rules-making procedure progressed Actually blew several opportuni ties ignored preliminary proposals cross-proposals final vote really toes opposed new Easy B rules could possibly have stopped whole thing presenting good enough case against original proposal however kept quiet barely noticed original proposal accepted consideration proceeded totally ignore whole cross-proposal situation As turned out final rule now have live until January 1982 product cross-proposal basic proposal So whats next Well look back October 1980 MA Competition Newsletter section lists great number Free Flight rules proposals eight Indoor Preliminary proposals proposals get enough votes accepted die vine speak FF Contest Board must vote proposals sometime December 1980 may see comments until after despair Continue watch Competition Newsletter section wait proposals survive initial vote published again will have opportunity counsel FFCB representative time must also watchforcmss-proposals may drastically modi proposals originally liked Cross-proposals may also change proposal didnt like OK can also submit own crossproposals instructions will published along some rules proposals See article Contest Board procedures Augnst 1980 Competition Newsletter sec tion MA vigilant speak up writing Lets Fly Although have number contests held during summer including NIMAS VNART Nats US Indoor fliers dont get chance limber up models until snow flies whatever passes winter area has practice list contests flying sessions held anywhere US far CD has let know about winter schedule Miami FL Miami Indoor Airplane Modelers Association MIAMA has annonced entire 1980 flying season Note dates consid Continued page 121 Fietd repairs Buds portable assembly/bracing/repair jigs support broken model proper alignment repair built-up tail boom break ahead stab photos Tenny center section braced Bud moves jigs out tip utuuns install dihedral tip bracing Bud using adjustable supportsto fold tnewing properalignment attaching cabane/wing-post assembly eading edge actuallya tiny narrow balsa peg glued lengthwu u makes excellent anchor bracing wire January 1981 51 etc Send em buck pleasantly surprised Lest forget gumband-twisters longtime favorite Peck-Polymers has complete line nifty goodies anywhere FF Scale devotee ranging 1/20 square balsa sticks exciting Peanut plans kits anywhere world cant get excited Peck catalog should making RC tanks time magazine gets new attrac tion Butch Hadland Peanut Lacey kit will shelves Take Uncle Bill will winner beginner devaluated dollar PO Box 2498 La Mesa CA 92041 will get catalog No 22 Bill Warner 423-C San Vicente Blvd Santa Monica CA 90402 FF Indoor/Tenny Con finued page 51 esed firm last-minute circumstances can alter own convenience confirm dates day before meet calling 305 858-6363 contestdates Nov 16 Dec 14 1980 Jan 18 Feb 15 Mar 15 April 19 May 17 1981 MIAMA has lost access Goodyear blimp hangar Opa Locka Airport contest reverts Cat status since site 28-ft gymnasium Miami Dade South College new contest venue no longer has HLG Paper Stick now includes Old-Time Baby ROG gem event uses 1930 ALMA rules Motor stick 8-in long maximum rubber loop 10-in long maximum two -in diameter minimum wheels turn model must papercovered Just reminder Since almost time contest season start should thinking about repairs modelsbefore first contest opens past experience can remember little enough time re trim models compensate warps have accumulated over summer add repair time already-crowded schedule may well lose default since models wont up snuff Suppose forget Thats what usually remember take all-purpose repair jigs contest no matter what set jigs modular can easily carried box lOx 14 x 2-in used mostly home assemble motor stick components attach tail booms tail surfaces fuselage assembly brace tail surfaces assemble brace wings short whole model assembly job Since various parts modular easily carried really little excuse carry along contest photos shows three components field repair situation look closely model stands will note built-up tail boom subject future discussion fractured about inch ahead stab So two rear stands supporting tail group stub tail boom fuselage being supported another stand use First flat surface top model box case located Next primary jig fuselage cradle securely taped surface motor stick anchored using crossed straight pins hold place Since repairjob two adjustable stands located approximately correct location tail group placed stab anchored straight pins angle Note usually evident thin balsa Indoor r Q~ LOCK OF THE CENTURY .AND THIS IS IT Hidden behind prop inside spinner lies innovative spinner lock ing device yet achieved beautiful piece nose cone fits over back plate positively locked sliding hidden locking ring behind prop inside spinner small screwdriver nose cone effortlessly pulls off disengaged put back equal ease seconds NO BOLTS THREADS SCREWS SLOTS OR TABS NO MORE PARTING LINES TO COLLECT DIRT NO BLEMISHES OR VISIBLE BACK PLATES EASY ON. EASY OFF NO MORE HURTING PALMS OR DAMAGED AIRPLANES FROM TRYING TOSLAPTHAT Four locking lugs hold spinner tight Made space age polycar bonate spinners practically unbreakable affected hot cold temperatures OTHER SPINNER ON NOSE CON LOCK NO P NO HO ACES 0 LOCK NOSE COSEI PROP SPA B 7 SIZES 2- 2-GA 3Dia 4 COLORS MATCHED TO MONOKOTE RED WHITE BLACK & YELLOW NO DRILLING Four adapter rings included fit engine shaft sizes WORKS PERFECTLY WITH ELECTRIC STARTERS PRICES FROM 250-400 PATENT PENDING PRo0 RO PRODUCTS INCORPORATED Bonner Road Wauconda Illinois 60084 USA January1981 121 * MOST STREAMLINED * COOL RUNNING * COMPUTED FOR YOUR ENGINE * NOTHING TO ADJUST * NO STRAPS NT FALL OFF * TAPPED FOR MUFFLER PRESSURE * LIGHT WEIGHT. 19 46 size approx 3/4 oz 50 90 size approx 1-1/2 oz * PROVEN IN NATIONAL COMPETITION LOWEST POWER LOSS PRICE $2000 POSTAGE & HANDLING 0 OHIO RESIDENTS ADDL SALES TAX 0 K & B 40 BAFFLE ADAPTERS AVAILABLE . AND STILL NO UNSIGHTLY STRAPSI ONLY $200 ADDITIONAL ROBERT PAUL PREPAID CHECK OR1482 ORCHARD GROVE MONEY ORDER TOLAKEWOOD OHIO 44107 SCS frames must anchored sticking pins through wood However possible purchase insect mounting pins tempered steel have diameter about 009-in sharp slide between wood fibersnd no damage necessary anchor stab fasten support time Otherwise may shatter stab alignment phase follows Note two rear stands individ ually adjustable height tilt Although process alignment tedious possible precisely align broken ends boom struts can butt-glued So move thing time until correct alignment achieved glue ends together Allow joint dry thoroughly apply thin parallel splint piece bridge joint What else can jigs Two other photos show wing two stages brac ing first wing being fastened cabane/wing post assembly sup ported same mounting block wing will use stored model box First cabane structure erected mount block taped work board Note board fastened table can rotated easy access either side wing board straight flat can used reference measure alignment during bracing operation other photo t l-tUl AND LAX I-Al-l WITH BEST QUALITY WING BAGS YOUR CHOICE OF COLORS PATTERNS LOGOS HEAYY WATERPROOF NYLON CLOTH THICK BLACK FOAM INTERNAL PADDING IA RAPA ROUND ZIPPER 2 PULLS ENTIRELY DOUBLE STITCHED INTERNAL POCKETS FOR STABILIZERS GREAT PROTECTION FOR ANY MODEL WING SEND S SE FOR FULL DETAILS SLOPE ASSOCIATES 2317 N 63RD SEATTLE WASHINGTON 98103 Jacli Arnhstrengs American P-40 a Japanese Zero Authentic Semi-Scale Reprints OualiRy card Stock Remember Well Flew just left right sides plan indicates tried after Upstart 4 built results looked good Also dont skimp stabilizer scoff reinforcing lightly stressed member take good look stabilizer has some carbon launch photo After seeing tripled carbon subsequent stabilizers Flying Add lead nose bring CG just behind position indicated plans fine-trim clay slow glide glider very sensitive CG shifts goes stall dive slightest provocation add some clay up elevator increase static stability margln thrown hard horizontally Upstart 4 should show no diving looping tendencies wants ioop remove clay add down stab decrease stab area wants dive add clay up increase stab area Keep mind looping tendencies can also result overly flexible flaps diving tendencies can result stiff flaps and/or overly flexible stab Small changes CG will still necessary fine-tuning glide have heard lot conflicting opinions what makes breaks transition climb glide opinions observations follows First rudder should small possiblejust big enough prevent wandering glide big rudder will make glider fly though rails prevent rapid yawing motion flip glide peak trajectory Sufficient dihedral also essential flip Other factors help having draggier right wing wider chord aCG slightly left centerline Sometimes extra right-rudder deflec tion together left tip weight necessary Some other problems often cause poor transitions poor launch over weight extremities CG too far back uninten tional flexing fuselage flying surfaces latter usually manifests itself erratic climbs well Fine-trimming glider does consist urn 5500merely adjusting nose weight until glider flies just short stall speed very important thing watch out premature stall either wing tip can prevent rest wing reaching its optimum lift coefficient thereby limiting performance glider people realize manner glider stalls can give great deal information premature stall instance does glider execute sharp turn right assuming right glide during stall sure sign right wing tip stalling pre maturely pulling glider around due extra drag Likewise stall left wing tip produces momentary tendency fly straight little left far best way delay wing tip stall droop leading edge careful bending Raising trailing edge instead often ineffective since reduces airfoil thickness maximum lift coefficient obtain able Anyway wing tips should tweaked produce stall causes no departure glide circle optimum glide trim itself can determined stopwatch glider best times resulted flying slightly faster slowest speed obtainable As final word should point out HL Glider Indoor event requires practice best glider contest will generally outfly competition flier inexperienced completely unfamiliar glider reason serious competitor should practice much possible allows him wring last second out primary bracing has installed dihedral tip bracing being added last photo shows typical wire mounting peg installed wing leading trailing edges wherever wires will attach framework reason using long skinny piece glued lengthwise glue applied anchorthe wire will soften joint anchoring peg Also need adjust bracing later small amount thinner will allow loosen wire disturbing peg Bud Tenny P0 Box 545 Richardson TX 75080 Upstart 4/Drela Continued page 54 Under no circumstances should piece subjected flexing during time since cement soft weak some delamination will likely occur will probably spots no cement applied didnt soak through balsa after drying flex piece lightly observing compression side fibers popping off Eliminate defects applying very thin cement wiping off excess Id like recommend apply carbon fiber four sides fuselage instead 122 Model Aviation REPUBLIC SEABEE o MR Gs PRODUCTS 1100 Michigan Box 161 Marysville MI 48040 Wing Span 78 complete Hardware Epoxy Glass Retractable Gear 40 PoweredA Factors N ON REAR NGS BROWN CO 2 ENG NE5 IIE'lIitSII REA APANESE 5555 PROPS 175PAN i4COMPLETE CATALOG $1 00 MAN HARD OF NO EMS Pech-PeIpmes W BOX 2498 AM LA MESA CALII 92041