FREE FLIGHT INDOOR STAN STOY have lost another innovative thinkers Stan Stoy passed away Septemher 1993 after illness Three Stans accomplishments help remember him Coot folding-wing HLGs turbulence rectification projects involved new concept Coot featured deep undercamber formed curved flap comprised wing trailing edge rearmost onefourth wing flap attached fuselage leaving free deflect under load During launch stress flap flexed enough reduce camber reducing drag Launched straight up properly trimmed Coot recovered minimal altitude loss Only Stan brother Mike did consistently well Coot Mark Drela applied principle larger glider set record Stans folding-wing gliders represented conceptual aeronautical innovation high order Outer wing panels folded down lie flat against inner panels held air pressure reduced span changed airfoil low-drag symmetrical section transformed model sleek missile As model slowed down tip panels unfolded model rolled out again minimal altitude loss Besides aeronautical advances represented folding- wing glider structural design solved strength-ofmaterials problems produce reliable design As witness participant Stans demonstration turbulence rectification impressed small Category site contained large number blowers blew down continuously no accessible controls turn off blower output multiple vertical columns high-speed air splashed off floor creating updrafts surrounding vertical downdrafts Stans experiment simple demonstrate Coot could trimmed fly effectively extreme turbulence created blowers record-trials sanction effect several timers observers present flight Coot mushed through downdrafts rode updrafts gaining altitude almost circle Left 0-ring cutting fixture Plastic tube tight fit razor blade slices 0-rings size Bud Tenny photo closed space net air movement balanced out zero yet model consistently gained altitude lost resulting flight times consistently higher model could still air final flight time submitted record close two minutes homologated end year having proved point Stan voluntarily withdrew time reviewed December 1976 Indoor News Views issue reported turbulence rectification event writing column surprised find actual record time wasnt mentioned issue contains Stans analysis event reasons model succeeded well want read analysis send SASE request 1994 Living Room Stick Postal Contest As noted official results sheets 1993 event 1994 postal begins January 1 Start winding 1994 US Indoor Championships fantastic meet go again will either three four days beginning June 2 1994 Contest Manager Gary Underwood Phil Klintworth CD Get entry forms early sending SASE Phil Klintworth 936 Lakewood Rd Fairfield Glade TN 38555 Note us also automatically received entry forms last year Nats part show Indoor Nats slated part unified Nats held later year Lubbock Texas MiniStick Kit Jiri Kalina producing MiniStick kit astounding amount prefabrication contains prestripped spars formed tail booms motorsticks hardware mounted complete props rolled sockets preformed cut ribs Efforts being made import kits nothing arranged writing Two Sites Two Records Bob Randolph Bob Gibbs have able get access two hangars recently decommissioned Norton AFB hangar almost perfect Category II height second 80 feet high FAI measure Bob Randolph has made good use opportunity making FiD record applications flights 4514 Category III 4532 Category II isnt able explain Category II flight longer Unfortunately available access very random very short notice Finding Sites club has secured use site trading services periodic use site group organized Tom Brennan Main Continued page 138 March1994 115 Jim Clem uses three-ounce bottles detergent water wash motors bench Bud Tenny photo Jim Clem record Pennyplane model set Category mark 1246 John Horton photo Above Modified work glove acts shield prevent lacerated skin broken motors Bud Tenny photo FF IndooriTenny Continued page 115 County California organized classes students school exchange monthly use gymnasium addition group donates event entry fees school recreation fund Several months ago reported similar program involving Air Force Academy near Denver Are other groups similar programs possibility stories can assembled document made available other materials finding securing sites Lets make happen Flying opportunities session series listed below carried over listing previous column CDs events beginning April 1994 send schedules ASAP Refer previous columns listings site contact-persons CaliforniaBurbank Blacksheep Exhibition Squadron VMF-2 14 has monthly sessions second Fridays flying Category site Luther Burbank Middle School 7-10 pm Tony Naccarato 2121 N Hollywood Way Burbank CA 91507 Tel 818 842-5062 CaliforniaLos Angeles area Monthly sessions Naval & Marine Corps Armory next Dodger Stadium Paul Avery 6360 Germaina Ct Agoura Hills CA 91301 Tel 818 707-0282 CaliforniaMain County 20 miles north San Francisco Year-round minicontests 8 am-2 pm fourth Sunday month site standard basketball court 28 feet clear Contact Tom Brennan 21326 Via Colombard Sonoma CA 95476 Tel 707 938-2893 CaliforniaSan Diego Fun-Fly Scale sessions 2nd Friday month monthly sessions fourth Friday Colina Del Sol Community Center Category 5316 Orange Ave San Diego Howard Haupt 3860 Ecochee Ave San Diego CA 92117 Tel 619 272-5656 CanadaOntario area Dan OGrady 50 Largo Crescent Nepean Ontario Canada K2G3C7 Indoor flying Woodroffe Hugh School Ottawa Mondays 7 pm 10pm January 31 February 7 1421 28 April 11 18 25 May 29 16 30 1994 ColoradoDenver Several 1994 sessions planned Contact Les Shaw 995 Mclntire St Boulder CO 80303 Tel 303 499-0946 ConnecticutGlastonbury Sunday sessions January 9 February 6 March 13 April 3 May 11994 Contact George Armstead 89 Harvest Lane Glastonbury CT 06037 Tel 203 633-7836 details FloridaMiami Monthly meets sponsored Mianii Indoor Airplane Modelers Association Delta Airlines Maintenance Hangar Tampa Florida February 12-13 March 19-20 April 16-17 May 14-15 1994 Contact Dr John Martin 2180 Tigertail Ave Miami FL 33133 Tel 305 858-6363 IowaCedar Rapids Regularly scheduled unsanctioned flying sessions through March 94 28-foot ceiling Paul Mcllrath 1524 48th St NE Cedar Rapids IA 52402 Tel 319 393-4677 KansasWichita Session Friends University 28-foot site 12-6 pm Planned first weekend month subject approval January 94 through March 94 Normal schedule heavy events 12-2 pm lightweight events 2-6 pm Contact Stan Chilton 725 E Lincoln Wichita KS 67211-3302 Tel 316 686-9634 KentuckyLouisville Flying sessions Tuesday Sawyer Park site 11 am-1 pm Also Saturday month subject military schedules Kentucky Air National Guard suite 10 am-2 pm Contact Mason Plank 3207 Oriole Dr Louisville KY 40213 Tel 502 634-8191 New YorkBrooklyn Indoor contests March April 1994 Blue Nose Hangar Floyd Bennett Field Brooklyn Site has 150 x 450-foot floor 45 feet rafters field truss beam easy retrieval Contact Don Ross 38 Churchill Rd Cresskill NJ 07626 Tel 201 568-5272 OhioCleveland area Weekly sessions year-round Category sites site Willoughby Andrews School has 20-foot flat ceiling 60 x 80-foot floor area other site Meridian Euclid Hospital Euclid has 195-foot ceiling 45 x 70-foot floor area Contact Vein Hacker 25599 Breckenridge Dr Euclid OH 44117-1807 Tel 216 486-4990 OklahomaOklahoma City 1994 minicontests National Guard Armory January 9 Easy B NoCal February 6 MiniStick NoCal Annual contest March 6 1994 Jim Belson 4933 NW 29th Oklahoma City OK 73129 Tel 405 946-1093 OklahomaTulsa Indoor sessions January 14 February 12 contest March 12 1994 Roy OMara 9120 E 7th St Tulsa OK 74112 Tel 918 815-1424 PennsylvaniaPhiladelphia Flying Bryn Athen Fairmont Park Joe Krush 409 Wamer Rd Wayne PA 19087 Tel 215 688-3027 WashingtonSeatlle area flying sessions Boeing Everett Recreation Center January 22 March 19 May 21 1994 Sessions Naval Air Reserve Center February 26 April 16 1994 Everett Rec Center events contact Keith Vamau 206 342-9218 Reserve Center contact Gene Stubbs 206 237-6419 WisconsinRacine Bong Eagles contest March 13 1994 Memorial Hall Racine Wisconsin Tony Italiano 1655 Revere Dr Brookfield VI 53005 Tel 414 782-6256 Variable-Geometry Props lowceiling records much higher used reason variable geometry props becoming common just FlD models photo shows Jim Clem Pennyplane model holds Category record 1246 Jims model uses variablepitch prop other variable-geometry props vary diameter instead pitch work Variable geometry props operate concept slowing climb rate until burst gone change geometry rpm increases enough start new climb concept illustrated discourse part dossier required part FM documentation Bob Randolphs 4532 Cat II record model released inches floor climbed very slowly steadily about 40 feet altitude 18 minutes flight down 35 feet prop moved lower pitch started another slow climb peaking about 44 feet model finally settled floor 4532 turns remaining counted average rpm 457 narrative starkly different normal flight pattern Indoor model Regardless initial rate climb models fixed props gain altitude start flight Typical high-duration lowceiling flights models fixed props consist long period ceiling scrubbing rafter-banging last part flight descent sink rate slightly higher variable prop difference fixed prop requires certain level torque maintain steady descent same stage flight variable prop running lower pitch variable pitch reduced diameter pitch variable diameter smaller prop requires much less torque same rate sink allows much total energy used same motor compelling reason using variablegeometry propellersto extract maximum amount energy motor Tracking Pitch Variations Refer chart Figure 3 January 94 column gain perspective exactly pitch varies along length prop blade prop changes geometry chart helical pitch can see unmodified prop approaches 900 zero radius blade rotated higher angle rotated Continued page 168 138 Model Aviation 4 No138 Fieseler Storcit 90 Scale orodol 23-45 5-chanoel$ 400 No169 t3onnpplooe 90 oeroioo forood oabin nodal kit front Il$ 400 No 193 StIletto CL Stont roodal MoGonald oinnor 15761980 $ 375 No229 010 RoIloblo RC 70 oorsioo 0128 old-tiorer REM contrc$ 425 No262 Crooltorootor CL orosh-prool froinor Two saest 530$ 125 No 302 MIol F16 RC Sorpolos 009 doofed 100 sport thor 2 ohOnnel 60100 wings tOil 004 fonnlogo oflooforo$ 360 No3101938 Ff009 Sf plan 90 Sport Soolo 3544 powor old 4-ohotool Sports 5610 o 2 plan Ohoots$ 025 No 314 00k III 90 Ken WillorIt s flying boot 30500001 15 power Fly front food wifhr 0000910 goor$ 275 No326 Taylor Cob 9C Don Sbus Sohoofyord Scale 040 powot 2-3 ohonnof Spoon 1 in$ 350 No322 Zephyr RC 0100ff 2-ohonnol Glider hond-loonoh tow thonnol 01 5lOpe 000009$ 200 No 366 Laser 260 90 Sport Soolo replioo ohowpionOhip AOrObOho flier 40 power 4-5 ohoenol 2 pfon shoofo$ 1075 No 447 1/2A Miss Asrdea 90 Old tinter ISA Teoooo 100401 rl--$ 650 No 639 Slesfiar SlOst-MortIno 19 RC Tailloso flying wing 15 power Spono 00 30500001$ 350 No 991 S. Boo Modol Y 90 Golden Age 90001 Spono 72-in l~ t 00$1175 No686 Modoh 90 Slopo-Sworing Soilylono Spoon 41 in. 260 oh0 425 90096 CorosOt 190 90-Asolof 51 4-tinter onlorgod 150% Spans 7$ 850 No663 Sperrow 600k F-30 FF Contpostioo robber-power plono woo$ 225 No66047166 RC Spoelal 90 AeroSotlo spon plone fordS power Sp$1075 No664 TOrOeOat 90 TreinorlSpodsfer styled oher Ff4 Spoen 60 r 25 No664 Staggorwleg Baoeh 3090000190 Sohoolyord-Soole bi-wing Spodotor 045 power Spots 32 le$ 375 No666 Poller 90 Fooorntypo sport piano 2-or 4-oyole power Spoon 60105 725 No 700 Randys 010090 OOOlOntiOal oorsohle Spod Troiner 14001 fortS power Weighs 33-00 Spans 25410$ 575 No 701 Jasopin Gee 90 045 porloenanoe Spodofer designed foe fly 000010 WeIghs 3-lb 5P005 4010 40-45 powot$ 725 No702 HaIskol 86 161FF Soole 1004010119240011000 wonoplarto HiLino Mlni-6 geored eleotrin 10010r SpotwOfi 10$ 260 No790 ZeOON FF Hond-LOonoIr Glider notinoC oonrpOtitiOO Wing DT Spoon 1810. 35138 growsS 200 No710 0010kb 36090 Pylon loner end Sport flier intosOOdiOtO boiltiorllllier Con toned CL 9000 ponoor Foow wing spoon 45100 550 No711 Fokker 611 Typo FF ROG Robbsrpowered Ontdoor Stick wodel Rowinionont 0150061 GonnOn Ightor Sonoes 23510$ 200 No712 V1st 664190 L9OTP 90 5po0 50010 version Finnish Vinbe 10ilOoty trainer Goadra Zenooh poster SpaO5 5410 2 $100 sheets .. $ 1500 No714 Mod Seek 90 anerf8ondly Spoc flier relaned 010w flight Enoolo 0110w slow 10000000w 25-30 poster 59005 6011 2 pbon sheets$ 900 No715 Stephoes Aoro 90 Gcartorscalo osrobatin piano opens 72510 noes 75150 power 2 plan 090010$ 1375 No716 Slow Pokar FF flooord-seOing 1014001 HLG spoon 245 Wood ofrootoro reinforoed wiOr 001500 fiber0 200 No717 Seetlan RC Cetokal PIano 60 SporsiooroSot 1110111010 Rassia br 3500 008100 3-o00000s spoon 475-in5 575 No716 LIt BIpo 90 Very oorobe0o lcnfly bipo dooign JOhO Hanfor SPOOn 88510 1013040 power 2 pioe sheets5 600 No719 Ada 90 ElectOn podonnanoolspod glider 96-direot-ddoe wotOr Foot ohonnolO Spans 6910 VoyabI flop snytow 2 p100 sheets5 725 No 720 MissSeosae FF FrOnk 70100 popalor oll-Solso-oooestd robbsrpowolOd wodel taken front PopolarSoieene JO00 f 541 Spoon 20105 200 No 721 LII Feller 90 widwing fonly sport plane Folly serobotlo 4Ohonnel canfrol FordS-St power Spons 48-10$ 600 No722 Losep M9/2 FF Goablod 700g-in row Oostonion design Mini-6 trotor old 55 10AH 9000005 SPOOn 1511-in$ 225 No723 Aol 07 CL Designed Polond P1011 Zawada 016010 Poonee Intended Shod Aerobatics Profiront FortS power Spoon 3fl1-in$ 400 No724 60001 Woapes 90 Giant Scale wid-wing aerobotic ship token front 0601001 1947 Stool design Spoon 60-in 2 plen shoots$1600 No725 CardInal fifi CL StonIer 060010040 60s fires 4 Stont shipo 60Cr OwaldOd 20 appeoronne points Spoon 621-in 60 power.. 51125 No 726 010-Ak-Do 90 ElooOc-powerod lightweight Cessna lookalike 0101 P01035 10010r 8-nell pock Spoon 52V410 2 plon sheets$1125 No 727 0091. XF7C Seahawk CL walti-porposo bi-winger Can onropefe beth Protile Scab sod Sony Canier Spoon 33-in 35140 power$ 460 No728 ElectrIc 006116 490 FF Ff00140 onnoewion Con 5000111 fl-cell Class 017-nell Oloon 6 Spoon 901010 AwIrof file 030009011 wtr$ 725 No 729 TigorCat 90 P100180 73-in-spon ecolotior 01 TigerfiSeo Low-wing sportloorobatlo 00001160100101 sod 2fl 1200 MW cells 2 plon shIn$1400 Ne 730 Snapper CL Protle stonIer based cloonic 1954 IsA Snapper 4811s-iosyon widwing 25-30 power$ 050 No721 FoalIrer Merchant FF Old-Tiwer 101FF 90 AroloL 73 oponiSs power boot fly occeytloonIly wide stall toleronne 2 p100 shoots$ 1095 No722 LOOO-WIsgArfa Loog-wing yl00 9310 spon IcrARIA 90 sport Slider Wing p100 reqoites plan 718 1 plan shoot8 470 Na 7321941 Toylerorafit 90 qooOer-noOlo design 04010100 oniqae flying goolitios 01150 loli-twale Tayisroraft 109-iooh span 2 plon sheets01450 No724 Seslpe 90 4-noale test wodel 76-irch spon $ 1550 No73536 SpecIal CL 40-powered bipiono stool rood ken0 400 No736 Test II FF101 Ostdoor HLG coropotifion t8inc 100$ 155 No737 P40 JN-l 30900001 90 sport desion 10115 0091005 spans 001$ 475 No738 MInI-stIOIMAX FF Rohber Scab vowioc loll-sloe oltrolighI SPOI 10247$ 100 No739 Jooster 90 Sailplane has looks podoononne 122-inoh spon 10010400 toll canstrostlon test 3 p1w sheets$1475 No 749 No0908 CL Nostalgo Slont Gpdot 04 version 1960 Notsobard design has 5612$ 7SS No741 WhIt ElocIdelas90 EleoldO OS 1001010 last ond ntoneooeroble Spon 3$-ot$ 500 No74240 FlyIng AeOs Oflek P100160 winatore oewlon 01 Old-Tinter design 1 shoot 0009 100 No749 RC Boreahe All-shoot scaled-op 001010001FF HLG 1 sheet spans 6010$ 475 No744 CL Falooe 49 Spod stonIer based Dahe Fcc design 2 sheets spoon 5511410$1060 90749 SenIor Slow MotIon Enlarged vention fill Evans 90 design hon 64-inch wiegnyar 5400010 area$ 575 No74490 Konsaa CIty Clipper PP design 110101537 adopted 1090 T$1760 60747FF 6041-$ 475 No746 Bowdon 1tsr$ 850 No 740 lstpela-B- -$ 5S0 No750 BoeIng F$ 1450 Ne 751 BIC So Long FF014-Tinter ForstOr 1$ 700 No752 Meeter paddle 90 P100110 seaplane fo$ 670 No 703 Cosene BIrd Do4Profile Soale 0010100 Tee 000051 power0 500 No 754 SIrraiGlfnnor Spoolal 9ohber CL trainers poolS 0011db$ 225 Full-size plan list available Complete listing plans previously published magazine through no 730 may obtained free charge writing enclose 52 stamped pre-addressed #10 business-size letter envelope ModelAviat ion 5151 E Memorial Dr Muncie IN 47302 [v32][b-1-10-1-10]]1 rCircle numbers plans wish order besf hsnding pesse nokide requeSt SOrPe other Service psns order No phone orders Cs) 317 289-4236 order assistance ONLYI 136169193225262302310314326332386447539581I 588598603650654684686700701702705710711712I 714715716717718719720721722723724725726727I 728729730731732733734735736737738739740741I 742743744745746747748749750751752753754755I Plan price includes first class postage US delivery Air Mail over 300 miles ase No COD Orders Make check money order payable US funds drawn US bank Model Aviation 0/0 AMA 5151 East Memorial Dr Muncie IN 47302 Please allow 3 6 weeks deliveryI Please print carefullyEnclosed $____ ________ II NAME________AMA No _________ __________________ STREET-I CITY ________ ___________ . __ II STATE __________________________________________________ ___________________________ ZIP ______________________________________________________ orders non-US addresses please add $250 Air Mail postage handling plan L-I FF IndoouiTenny Continued page 154 angle prop centerline will become greater 900—clearly undesirable implication blades variable-pitch prop should built block pitch equal highest pitch prop will assume prop rotates low pitch blade hub tip washed out lower angle equivalent helical pitch pitch distribution can probably reduce required blade angle change needed effective energy extractionA similar analysis can made variable-diameter props major difference mathematical analysis chart retracted blade reduces pitch tip way hub Instead center blade doing pulling tips heavily loaded variable- diameter prop Keep Motors Clean photo shows Jim Clemrs solution keeping motors clean under difficult conditions two three-ounce bottles filled mild detergent solution other water After wiping motor down remove some lube dirt Jim puts motor detergent shakes bottle vigorously After similar treatment bottle water motor ready lubricated used again No Ouch Like anyone winds blast fairly often Jim Clem breaks some motors dont break motors arent winding enough photos shows modifies heavy work glove shield save skin Making 0-rings Another photo shows fixture eases 0-ring cutting consists wooden block aluminum faceplate block faceplate drilled snug fit plastic tube used source material strongest 0-rings Ive tried cut plastic push-up handles found orange sherbet treats found convenience stores fixture used way push tubing through faceplate just enough allow thin ring cut Next enough tube pushed through make 0-ring desired thickness Single-edge razor blades pressed flat against faceplate used make cut cut partway through opposite sides form 0-rings parallel sides Model Aviation Two-Meter Jouster$850 Smaller version popular RO sailplane Plan #739 weighs 38-40 ounces Compost 5Pe'J Metelz aooks Precioion lnsbssmessts 4LATHES complete Cetelog $250 CAMPBELL TOOlS CO 0 eMsolmaRoed Springfield OH 45505 A650fleeees6VLOODt0005e 922-6362
Edition: Model Aviation - 1994/03
Page Numbers: 115, 138, 168
FREE FLIGHT INDOOR STAN STOY have lost another innovative thinkers Stan Stoy passed away Septemher 1993 after illness Three Stans accomplishments help remember him Coot folding-wing HLGs turbulence rectification projects involved new concept Coot featured deep undercamber formed curved flap comprised wing trailing edge rearmost onefourth wing flap attached fuselage leaving free deflect under load During launch stress flap flexed enough reduce camber reducing drag Launched straight up properly trimmed Coot recovered minimal altitude loss Only Stan brother Mike did consistently well Coot Mark Drela applied principle larger glider set record Stans folding-wing gliders represented conceptual aeronautical innovation high order Outer wing panels folded down lie flat against inner panels held air pressure reduced span changed airfoil low-drag symmetrical section transformed model sleek missile As model slowed down tip panels unfolded model rolled out again minimal altitude loss Besides aeronautical advances represented folding- wing glider structural design solved strength-ofmaterials problems produce reliable design As witness participant Stans demonstration turbulence rectification impressed small Category site contained large number blowers blew down continuously no accessible controls turn off blower output multiple vertical columns high-speed air splashed off floor creating updrafts surrounding vertical downdrafts Stans experiment simple demonstrate Coot could trimmed fly effectively extreme turbulence created blowers record-trials sanction effect several timers observers present flight Coot mushed through downdrafts rode updrafts gaining altitude almost circle Left 0-ring cutting fixture Plastic tube tight fit razor blade slices 0-rings size Bud Tenny photo closed space net air movement balanced out zero yet model consistently gained altitude lost resulting flight times consistently higher model could still air final flight time submitted record close two minutes homologated end year having proved point Stan voluntarily withdrew time reviewed December 1976 Indoor News Views issue reported turbulence rectification event writing column surprised find actual record time wasnt mentioned issue contains Stans analysis event reasons model succeeded well want read analysis send SASE request 1994 Living Room Stick Postal Contest As noted official results sheets 1993 event 1994 postal begins January 1 Start winding 1994 US Indoor Championships fantastic meet go again will either three four days beginning June 2 1994 Contest Manager Gary Underwood Phil Klintworth CD Get entry forms early sending SASE Phil Klintworth 936 Lakewood Rd Fairfield Glade TN 38555 Note us also automatically received entry forms last year Nats part show Indoor Nats slated part unified Nats held later year Lubbock Texas MiniStick Kit Jiri Kalina producing MiniStick kit astounding amount prefabrication contains prestripped spars formed tail booms motorsticks hardware mounted complete props rolled sockets preformed cut ribs Efforts being made import kits nothing arranged writing Two Sites Two Records Bob Randolph Bob Gibbs have able get access two hangars recently decommissioned Norton AFB hangar almost perfect Category II height second 80 feet high FAI measure Bob Randolph has made good use opportunity making FiD record applications flights 4514 Category III 4532 Category II isnt able explain Category II flight longer Unfortunately available access very random very short notice Finding Sites club has secured use site trading services periodic use site group organized Tom Brennan Main Continued page 138 March1994 115 Jim Clem uses three-ounce bottles detergent water wash motors bench Bud Tenny photo Jim Clem record Pennyplane model set Category mark 1246 John Horton photo Above Modified work glove acts shield prevent lacerated skin broken motors Bud Tenny photo FF IndooriTenny Continued page 115 County California organized classes students school exchange monthly use gymnasium addition group donates event entry fees school recreation fund Several months ago reported similar program involving Air Force Academy near Denver Are other groups similar programs possibility stories can assembled document made available other materials finding securing sites Lets make happen Flying opportunities session series listed below carried over listing previous column CDs events beginning April 1994 send schedules ASAP Refer previous columns listings site contact-persons CaliforniaBurbank Blacksheep Exhibition Squadron VMF-2 14 has monthly sessions second Fridays flying Category site Luther Burbank Middle School 7-10 pm Tony Naccarato 2121 N Hollywood Way Burbank CA 91507 Tel 818 842-5062 CaliforniaLos Angeles area Monthly sessions Naval & Marine Corps Armory next Dodger Stadium Paul Avery 6360 Germaina Ct Agoura Hills CA 91301 Tel 818 707-0282 CaliforniaMain County 20 miles north San Francisco Year-round minicontests 8 am-2 pm fourth Sunday month site standard basketball court 28 feet clear Contact Tom Brennan 21326 Via Colombard Sonoma CA 95476 Tel 707 938-2893 CaliforniaSan Diego Fun-Fly Scale sessions 2nd Friday month monthly sessions fourth Friday Colina Del Sol Community Center Category 5316 Orange Ave San Diego Howard Haupt 3860 Ecochee Ave San Diego CA 92117 Tel 619 272-5656 CanadaOntario area Dan OGrady 50 Largo Crescent Nepean Ontario Canada K2G3C7 Indoor flying Woodroffe Hugh School Ottawa Mondays 7 pm 10pm January 31 February 7 1421 28 April 11 18 25 May 29 16 30 1994 ColoradoDenver Several 1994 sessions planned Contact Les Shaw 995 Mclntire St Boulder CO 80303 Tel 303 499-0946 ConnecticutGlastonbury Sunday sessions January 9 February 6 March 13 April 3 May 11994 Contact George Armstead 89 Harvest Lane Glastonbury CT 06037 Tel 203 633-7836 details FloridaMiami Monthly meets sponsored Mianii Indoor Airplane Modelers Association Delta Airlines Maintenance Hangar Tampa Florida February 12-13 March 19-20 April 16-17 May 14-15 1994 Contact Dr John Martin 2180 Tigertail Ave Miami FL 33133 Tel 305 858-6363 IowaCedar Rapids Regularly scheduled unsanctioned flying sessions through March 94 28-foot ceiling Paul Mcllrath 1524 48th St NE Cedar Rapids IA 52402 Tel 319 393-4677 KansasWichita Session Friends University 28-foot site 12-6 pm Planned first weekend month subject approval January 94 through March 94 Normal schedule heavy events 12-2 pm lightweight events 2-6 pm Contact Stan Chilton 725 E Lincoln Wichita KS 67211-3302 Tel 316 686-9634 KentuckyLouisville Flying sessions Tuesday Sawyer Park site 11 am-1 pm Also Saturday month subject military schedules Kentucky Air National Guard suite 10 am-2 pm Contact Mason Plank 3207 Oriole Dr Louisville KY 40213 Tel 502 634-8191 New YorkBrooklyn Indoor contests March April 1994 Blue Nose Hangar Floyd Bennett Field Brooklyn Site has 150 x 450-foot floor 45 feet rafters field truss beam easy retrieval Contact Don Ross 38 Churchill Rd Cresskill NJ 07626 Tel 201 568-5272 OhioCleveland area Weekly sessions year-round Category sites site Willoughby Andrews School has 20-foot flat ceiling 60 x 80-foot floor area other site Meridian Euclid Hospital Euclid has 195-foot ceiling 45 x 70-foot floor area Contact Vein Hacker 25599 Breckenridge Dr Euclid OH 44117-1807 Tel 216 486-4990 OklahomaOklahoma City 1994 minicontests National Guard Armory January 9 Easy B NoCal February 6 MiniStick NoCal Annual contest March 6 1994 Jim Belson 4933 NW 29th Oklahoma City OK 73129 Tel 405 946-1093 OklahomaTulsa Indoor sessions January 14 February 12 contest March 12 1994 Roy OMara 9120 E 7th St Tulsa OK 74112 Tel 918 815-1424 PennsylvaniaPhiladelphia Flying Bryn Athen Fairmont Park Joe Krush 409 Wamer Rd Wayne PA 19087 Tel 215 688-3027 WashingtonSeatlle area flying sessions Boeing Everett Recreation Center January 22 March 19 May 21 1994 Sessions Naval Air Reserve Center February 26 April 16 1994 Everett Rec Center events contact Keith Vamau 206 342-9218 Reserve Center contact Gene Stubbs 206 237-6419 WisconsinRacine Bong Eagles contest March 13 1994 Memorial Hall Racine Wisconsin Tony Italiano 1655 Revere Dr Brookfield VI 53005 Tel 414 782-6256 Variable-Geometry Props lowceiling records much higher used reason variable geometry props becoming common just FlD models photo shows Jim Clem Pennyplane model holds Category record 1246 Jims model uses variablepitch prop other variable-geometry props vary diameter instead pitch work Variable geometry props operate concept slowing climb rate until burst gone change geometry rpm increases enough start new climb concept illustrated discourse part dossier required part FM documentation Bob Randolphs 4532 Cat II record model released inches floor climbed very slowly steadily about 40 feet altitude 18 minutes flight down 35 feet prop moved lower pitch started another slow climb peaking about 44 feet model finally settled floor 4532 turns remaining counted average rpm 457 narrative starkly different normal flight pattern Indoor model Regardless initial rate climb models fixed props gain altitude start flight Typical high-duration lowceiling flights models fixed props consist long period ceiling scrubbing rafter-banging last part flight descent sink rate slightly higher variable prop difference fixed prop requires certain level torque maintain steady descent same stage flight variable prop running lower pitch variable pitch reduced diameter pitch variable diameter smaller prop requires much less torque same rate sink allows much total energy used same motor compelling reason using variablegeometry propellersto extract maximum amount energy motor Tracking Pitch Variations Refer chart Figure 3 January 94 column gain perspective exactly pitch varies along length prop blade prop changes geometry chart helical pitch can see unmodified prop approaches 900 zero radius blade rotated higher angle rotated Continued page 168 138 Model Aviation 4 No138 Fieseler Storcit 90 Scale orodol 23-45 5-chanoel$ 400 No169 t3onnpplooe 90 oeroioo forood oabin nodal kit front Il$ 400 No 193 StIletto CL Stont roodal MoGonald oinnor 15761980 $ 375 No229 010 RoIloblo RC 70 oorsioo 0128 old-tiorer REM contrc$ 425 No262 Crooltorootor CL orosh-prool froinor Two saest 530$ 125 No 302 MIol F16 RC Sorpolos 009 doofed 100 sport thor 2 ohOnnel 60100 wings tOil 004 fonnlogo oflooforo$ 360 No3101938 Ff009 Sf plan 90 Sport Soolo 3544 powor old 4-ohotool Sports 5610 o 2 plan Ohoots$ 025 No 314 00k III 90 Ken WillorIt s flying boot 30500001 15 power Fly front food wifhr 0000910 goor$ 275 No326 Taylor Cob 9C Don Sbus Sohoofyord Scale 040 powot 2-3 ohonnof Spoon 1 in$ 350 No322 Zephyr RC 0100ff 2-ohonnol Glider hond-loonoh tow thonnol 01 5lOpe 000009$ 200 No 366 Laser 260 90 Sport Soolo replioo ohowpionOhip AOrObOho flier 40 power 4-5 ohoenol 2 pfon shoofo$ 1075 No 447 1/2A Miss Asrdea 90 Old tinter ISA Teoooo 100401 rl--$ 650 No 639 Slesfiar SlOst-MortIno 19 RC Tailloso flying wing 15 power Spono 00 30500001$ 350 No 991 S. Boo Modol Y 90 Golden Age 90001 Spono 72-in l~ t 00$1175 No686 Modoh 90 Slopo-Sworing Soilylono Spoon 41 in. 260 oh0 425 90096 CorosOt 190 90-Asolof 51 4-tinter onlorgod 150% Spans 7$ 850 No663 Sperrow 600k F-30 FF Contpostioo robber-power plono woo$ 225 No66047166 RC Spoelal 90 AeroSotlo spon plone fordS power Sp$1075 No664 TOrOeOat 90 TreinorlSpodsfer styled oher Ff4 Spoen 60 r 25 No664 Staggorwleg Baoeh 3090000190 Sohoolyord-Soole bi-wing Spodotor 045 power Spots 32 le$ 375 No666 Poller 90 Fooorntypo sport piano 2-or 4-oyole power Spoon 60105 725 No 700 Randys 010090 OOOlOntiOal oorsohle Spod Troiner 14001 fortS power Weighs 33-00 Spans 25410$ 575 No 701 Jasopin Gee 90 045 porloenanoe Spodofer designed foe fly 000010 WeIghs 3-lb 5P005 4010 40-45 powot$ 725 No702 HaIskol 86 161FF Soole 1004010119240011000 wonoplarto HiLino Mlni-6 geored eleotrin 10010r SpotwOfi 10$ 260 No790 ZeOON FF Hond-LOonoIr Glider notinoC oonrpOtitiOO Wing DT Spoon 1810. 35138 growsS 200 No710 0010kb 36090 Pylon loner end Sport flier intosOOdiOtO boiltiorllllier Con toned CL 9000 ponoor Foow wing spoon 45100 550 No711 Fokker 611 Typo FF ROG Robbsrpowered Ontdoor Stick wodel Rowinionont 0150061 GonnOn Ightor Sonoes 23510$ 200 No712 V1st 664190 L9OTP 90 5po0 50010 version Finnish Vinbe 10ilOoty trainer Goadra Zenooh poster SpaO5 5410 2 $100 sheets .. $ 1500 No714 Mod Seek 90 anerf8ondly Spoc flier relaned 010w flight Enoolo 0110w slow 10000000w 25-30 poster 59005 6011 2 pbon sheets$ 900 No715 Stephoes Aoro 90 Gcartorscalo osrobatin piano opens 72510 noes 75150 power 2 plan 090010$ 1375 No716 Slow Pokar FF flooord-seOing 1014001 HLG spoon 245 Wood ofrootoro reinforoed wiOr 001500 fiber0 200 No717 Seetlan RC Cetokal PIano 60 SporsiooroSot 1110111010 Rassia br 3500 008100 3-o00000s spoon 475-in5 575 No716 LIt BIpo 90 Very oorobe0o lcnfly bipo dooign JOhO Hanfor SPOOn 88510 1013040 power 2 pioe sheets5 600 No719 Ada 90 ElectOn podonnanoolspod glider 96-direot-ddoe wotOr Foot ohonnolO Spans 6910 VoyabI flop snytow 2 p100 sheets5 725 No 720 MissSeosae FF FrOnk 70100 popalor oll-Solso-oooestd robbsrpowolOd wodel taken front PopolarSoieene JO00 f 541 Spoon 20105 200 No 721 LII Feller 90 widwing fonly sport plane Folly serobotlo 4Ohonnel canfrol FordS-St power Spons 48-10$ 600 No722 Losep M9/2 FF Goablod 700g-in row Oostonion design Mini-6 trotor old 55 10AH 9000005 SPOOn 1511-in$ 225 No723 Aol 07 CL Designed Polond P1011 Zawada 016010 Poonee Intended Shod Aerobatics Profiront FortS power Spoon 3fl1-in$ 400 No724 60001 Woapes 90 Giant Scale wid-wing aerobotic ship token front 0601001 1947 Stool design Spoon 60-in 2 plen shoots$1600 No725 CardInal fifi CL StonIer 060010040 60s fires 4 Stont shipo 60Cr OwaldOd 20 appeoronne points Spoon 621-in 60 power.. 51125 No 726 010-Ak-Do 90 ElooOc-powerod lightweight Cessna lookalike 0101 P01035 10010r 8-nell pock Spoon 52V410 2 plon sheets$1125 No 727 0091. XF7C Seahawk CL walti-porposo bi-winger Can onropefe beth Protile Scab sod Sony Canier Spoon 33-in 35140 power$ 460 No728 ElectrIc 006116 490 FF Ff00140 onnoewion Con 5000111 fl-cell Class 017-nell Oloon 6 Spoon 901010 AwIrof file 030009011 wtr$ 725 No 729 TigorCat 90 P100180 73-in-spon ecolotior 01 TigerfiSeo Low-wing sportloorobatlo 00001160100101 sod 2fl 1200 MW cells 2 plon shIn$1400 Ne 730 Snapper CL Protle stonIer based cloonic 1954 IsA Snapper 4811s-iosyon widwing 25-30 power$ 050 No721 FoalIrer Merchant FF Old-Tiwer 101FF 90 AroloL 73 oponiSs power boot fly occeytloonIly wide stall toleronne 2 p100 shoots$ 1095 No722 LOOO-WIsgArfa Loog-wing yl00 9310 spon IcrARIA 90 sport Slider Wing p100 reqoites plan 718 1 plan shoot8 470 Na 7321941 Toylerorafit 90 qooOer-noOlo design 04010100 oniqae flying goolitios 01150 loli-twale Tayisroraft 109-iooh span 2 plon sheets01450 No724 Seslpe 90 4-noale test wodel 76-irch spon $ 1550 No73536 SpecIal CL 40-powered bipiono stool rood ken0 400 No736 Test II FF101 Ostdoor HLG coropotifion t8inc 100$ 155 No737 P40 JN-l 30900001 90 sport desion 10115 0091005 spans 001$ 475 No738 MInI-stIOIMAX FF Rohber Scab vowioc loll-sloe oltrolighI SPOI 10247$ 100 No739 Jooster 90 Sailplane has looks podoononne 122-inoh spon 10010400 toll canstrostlon test 3 p1w sheets$1475 No 749 No0908 CL Nostalgo Slont Gpdot 04 version 1960 Notsobard design has 5612$ 7SS No741 WhIt ElocIdelas90 EleoldO OS 1001010 last ond ntoneooeroble Spon 3$-ot$ 500 No74240 FlyIng AeOs Oflek P100160 winatore oewlon 01 Old-Tinter design 1 shoot 0009 100 No749 RC Boreahe All-shoot scaled-op 001010001FF HLG 1 sheet spans 6010$ 475 No744 CL Falooe 49 Spod stonIer based Dahe Fcc design 2 sheets spoon 5511410$1060 90749 SenIor Slow MotIon Enlarged vention fill Evans 90 design hon 64-inch wiegnyar 5400010 area$ 575 No74490 Konsaa CIty Clipper PP design 110101537 adopted 1090 T$1760 60747FF 6041-$ 475 No746 Bowdon 1tsr$ 850 No 740 lstpela-B- -$ 5S0 No750 BoeIng F$ 1450 Ne 751 BIC So Long FF014-Tinter ForstOr 1$ 700 No752 Meeter paddle 90 P100110 seaplane fo$ 670 No 703 Cosene BIrd Do4Profile Soale 0010100 Tee 000051 power0 500 No 754 SIrraiGlfnnor Spoolal 9ohber CL trainers poolS 0011db$ 225 Full-size plan list available Complete listing plans previously published magazine through no 730 may obtained free charge writing enclose 52 stamped pre-addressed #10 business-size letter envelope ModelAviat ion 5151 E Memorial Dr Muncie IN 47302 [v32][b-1-10-1-10]]1 rCircle numbers plans wish order besf hsnding pesse nokide requeSt SOrPe other Service psns order No phone orders Cs) 317 289-4236 order assistance ONLYI 136169193225262302310314326332386447539581I 588598603650654684686700701702705710711712I 714715716717718719720721722723724725726727I 728729730731732733734735736737738739740741I 742743744745746747748749750751752753754755I Plan price includes first class postage US delivery Air Mail over 300 miles ase No COD Orders Make check money order payable US funds drawn US bank Model Aviation 0/0 AMA 5151 East Memorial Dr Muncie IN 47302 Please allow 3 6 weeks deliveryI Please print carefullyEnclosed $____ ________ II NAME________AMA No _________ __________________ STREET-I CITY ________ ___________ . __ II STATE __________________________________________________ ___________________________ ZIP ______________________________________________________ orders non-US addresses please add $250 Air Mail postage handling plan L-I FF IndoouiTenny Continued page 154 angle prop centerline will become greater 900—clearly undesirable implication blades variable-pitch prop should built block pitch equal highest pitch prop will assume prop rotates low pitch blade hub tip washed out lower angle equivalent helical pitch pitch distribution can probably reduce required blade angle change needed effective energy extractionA similar analysis can made variable-diameter props major difference mathematical analysis chart retracted blade reduces pitch tip way hub Instead center blade doing pulling tips heavily loaded variable- diameter prop Keep Motors Clean photo shows Jim Clemrs solution keeping motors clean under difficult conditions two three-ounce bottles filled mild detergent solution other water After wiping motor down remove some lube dirt Jim puts motor detergent shakes bottle vigorously After similar treatment bottle water motor ready lubricated used again No Ouch Like anyone winds blast fairly often Jim Clem breaks some motors dont break motors arent winding enough photos shows modifies heavy work glove shield save skin Making 0-rings Another photo shows fixture eases 0-ring cutting consists wooden block aluminum faceplate block faceplate drilled snug fit plastic tube used source material strongest 0-rings Ive tried cut plastic push-up handles found orange sherbet treats found convenience stores fixture used way push tubing through faceplate just enough allow thin ring cut Next enough tube pushed through make 0-ring desired thickness Single-edge razor blades pressed flat against faceplate used make cut cut partway through opposite sides form 0-rings parallel sides Model Aviation Two-Meter Jouster$850 Smaller version popular RO sailplane Plan #739 weighs 38-40 ounces Compost 5Pe'J Metelz aooks Precioion lnsbssmessts 4LATHES complete Cetelog $250 CAMPBELL TOOlS CO 0 eMsolmaRoed Springfield OH 45505 A650fleeees6VLOODt0005e 922-6362
Edition: Model Aviation - 1994/03
Page Numbers: 115, 138, 168
FREE FLIGHT INDOOR STAN STOY have lost another innovative thinkers Stan Stoy passed away Septemher 1993 after illness Three Stans accomplishments help remember him Coot folding-wing HLGs turbulence rectification projects involved new concept Coot featured deep undercamber formed curved flap comprised wing trailing edge rearmost onefourth wing flap attached fuselage leaving free deflect under load During launch stress flap flexed enough reduce camber reducing drag Launched straight up properly trimmed Coot recovered minimal altitude loss Only Stan brother Mike did consistently well Coot Mark Drela applied principle larger glider set record Stans folding-wing gliders represented conceptual aeronautical innovation high order Outer wing panels folded down lie flat against inner panels held air pressure reduced span changed airfoil low-drag symmetrical section transformed model sleek missile As model slowed down tip panels unfolded model rolled out again minimal altitude loss Besides aeronautical advances represented folding- wing glider structural design solved strength-ofmaterials problems produce reliable design As witness participant Stans demonstration turbulence rectification impressed small Category site contained large number blowers blew down continuously no accessible controls turn off blower output multiple vertical columns high-speed air splashed off floor creating updrafts surrounding vertical downdrafts Stans experiment simple demonstrate Coot could trimmed fly effectively extreme turbulence created blowers record-trials sanction effect several timers observers present flight Coot mushed through downdrafts rode updrafts gaining altitude almost circle Left 0-ring cutting fixture Plastic tube tight fit razor blade slices 0-rings size Bud Tenny photo closed space net air movement balanced out zero yet model consistently gained altitude lost resulting flight times consistently higher model could still air final flight time submitted record close two minutes homologated end year having proved point Stan voluntarily withdrew time reviewed December 1976 Indoor News Views issue reported turbulence rectification event writing column surprised find actual record time wasnt mentioned issue contains Stans analysis event reasons model succeeded well want read analysis send SASE request 1994 Living Room Stick Postal Contest As noted official results sheets 1993 event 1994 postal begins January 1 Start winding 1994 US Indoor Championships fantastic meet go again will either three four days beginning June 2 1994 Contest Manager Gary Underwood Phil Klintworth CD Get entry forms early sending SASE Phil Klintworth 936 Lakewood Rd Fairfield Glade TN 38555 Note us also automatically received entry forms last year Nats part show Indoor Nats slated part unified Nats held later year Lubbock Texas MiniStick Kit Jiri Kalina producing MiniStick kit astounding amount prefabrication contains prestripped spars formed tail booms motorsticks hardware mounted complete props rolled sockets preformed cut ribs Efforts being made import kits nothing arranged writing Two Sites Two Records Bob Randolph Bob Gibbs have able get access two hangars recently decommissioned Norton AFB hangar almost perfect Category II height second 80 feet high FAI measure Bob Randolph has made good use opportunity making FiD record applications flights 4514 Category III 4532 Category II isnt able explain Category II flight longer Unfortunately available access very random very short notice Finding Sites club has secured use site trading services periodic use site group organized Tom Brennan Main Continued page 138 March1994 115 Jim Clem uses three-ounce bottles detergent water wash motors bench Bud Tenny photo Jim Clem record Pennyplane model set Category mark 1246 John Horton photo Above Modified work glove acts shield prevent lacerated skin broken motors Bud Tenny photo FF IndooriTenny Continued page 115 County California organized classes students school exchange monthly use gymnasium addition group donates event entry fees school recreation fund Several months ago reported similar program involving Air Force Academy near Denver Are other groups similar programs possibility stories can assembled document made available other materials finding securing sites Lets make happen Flying opportunities session series listed below carried over listing previous column CDs events beginning April 1994 send schedules ASAP Refer previous columns listings site contact-persons CaliforniaBurbank Blacksheep Exhibition Squadron VMF-2 14 has monthly sessions second Fridays flying Category site Luther Burbank Middle School 7-10 pm Tony Naccarato 2121 N Hollywood Way Burbank CA 91507 Tel 818 842-5062 CaliforniaLos Angeles area Monthly sessions Naval & Marine Corps Armory next Dodger Stadium Paul Avery 6360 Germaina Ct Agoura Hills CA 91301 Tel 818 707-0282 CaliforniaMain County 20 miles north San Francisco Year-round minicontests 8 am-2 pm fourth Sunday month site standard basketball court 28 feet clear Contact Tom Brennan 21326 Via Colombard Sonoma CA 95476 Tel 707 938-2893 CaliforniaSan Diego Fun-Fly Scale sessions 2nd Friday month monthly sessions fourth Friday Colina Del Sol Community Center Category 5316 Orange Ave San Diego Howard Haupt 3860 Ecochee Ave San Diego CA 92117 Tel 619 272-5656 CanadaOntario area Dan OGrady 50 Largo Crescent Nepean Ontario Canada K2G3C7 Indoor flying Woodroffe Hugh School Ottawa Mondays 7 pm 10pm January 31 February 7 1421 28 April 11 18 25 May 29 16 30 1994 ColoradoDenver Several 1994 sessions planned Contact Les Shaw 995 Mclntire St Boulder CO 80303 Tel 303 499-0946 ConnecticutGlastonbury Sunday sessions January 9 February 6 March 13 April 3 May 11994 Contact George Armstead 89 Harvest Lane Glastonbury CT 06037 Tel 203 633-7836 details FloridaMiami Monthly meets sponsored Mianii Indoor Airplane Modelers Association Delta Airlines Maintenance Hangar Tampa Florida February 12-13 March 19-20 April 16-17 May 14-15 1994 Contact Dr John Martin 2180 Tigertail Ave Miami FL 33133 Tel 305 858-6363 IowaCedar Rapids Regularly scheduled unsanctioned flying sessions through March 94 28-foot ceiling Paul Mcllrath 1524 48th St NE Cedar Rapids IA 52402 Tel 319 393-4677 KansasWichita Session Friends University 28-foot site 12-6 pm Planned first weekend month subject approval January 94 through March 94 Normal schedule heavy events 12-2 pm lightweight events 2-6 pm Contact Stan Chilton 725 E Lincoln Wichita KS 67211-3302 Tel 316 686-9634 KentuckyLouisville Flying sessions Tuesday Sawyer Park site 11 am-1 pm Also Saturday month subject military schedules Kentucky Air National Guard suite 10 am-2 pm Contact Mason Plank 3207 Oriole Dr Louisville KY 40213 Tel 502 634-8191 New YorkBrooklyn Indoor contests March April 1994 Blue Nose Hangar Floyd Bennett Field Brooklyn Site has 150 x 450-foot floor 45 feet rafters field truss beam easy retrieval Contact Don Ross 38 Churchill Rd Cresskill NJ 07626 Tel 201 568-5272 OhioCleveland area Weekly sessions year-round Category sites site Willoughby Andrews School has 20-foot flat ceiling 60 x 80-foot floor area other site Meridian Euclid Hospital Euclid has 195-foot ceiling 45 x 70-foot floor area Contact Vein Hacker 25599 Breckenridge Dr Euclid OH 44117-1807 Tel 216 486-4990 OklahomaOklahoma City 1994 minicontests National Guard Armory January 9 Easy B NoCal February 6 MiniStick NoCal Annual contest March 6 1994 Jim Belson 4933 NW 29th Oklahoma City OK 73129 Tel 405 946-1093 OklahomaTulsa Indoor sessions January 14 February 12 contest March 12 1994 Roy OMara 9120 E 7th St Tulsa OK 74112 Tel 918 815-1424 PennsylvaniaPhiladelphia Flying Bryn Athen Fairmont Park Joe Krush 409 Wamer Rd Wayne PA 19087 Tel 215 688-3027 WashingtonSeatlle area flying sessions Boeing Everett Recreation Center January 22 March 19 May 21 1994 Sessions Naval Air Reserve Center February 26 April 16 1994 Everett Rec Center events contact Keith Vamau 206 342-9218 Reserve Center contact Gene Stubbs 206 237-6419 WisconsinRacine Bong Eagles contest March 13 1994 Memorial Hall Racine Wisconsin Tony Italiano 1655 Revere Dr Brookfield VI 53005 Tel 414 782-6256 Variable-Geometry Props lowceiling records much higher used reason variable geometry props becoming common just FlD models photo shows Jim Clem Pennyplane model holds Category record 1246 Jims model uses variablepitch prop other variable-geometry props vary diameter instead pitch work Variable geometry props operate concept slowing climb rate until burst gone change geometry rpm increases enough start new climb concept illustrated discourse part dossier required part FM documentation Bob Randolphs 4532 Cat II record model released inches floor climbed very slowly steadily about 40 feet altitude 18 minutes flight down 35 feet prop moved lower pitch started another slow climb peaking about 44 feet model finally settled floor 4532 turns remaining counted average rpm 457 narrative starkly different normal flight pattern Indoor model Regardless initial rate climb models fixed props gain altitude start flight Typical high-duration lowceiling flights models fixed props consist long period ceiling scrubbing rafter-banging last part flight descent sink rate slightly higher variable prop difference fixed prop requires certain level torque maintain steady descent same stage flight variable prop running lower pitch variable pitch reduced diameter pitch variable diameter smaller prop requires much less torque same rate sink allows much total energy used same motor compelling reason using variablegeometry propellersto extract maximum amount energy motor Tracking Pitch Variations Refer chart Figure 3 January 94 column gain perspective exactly pitch varies along length prop blade prop changes geometry chart helical pitch can see unmodified prop approaches 900 zero radius blade rotated higher angle rotated Continued page 168 138 Model Aviation 4 No138 Fieseler Storcit 90 Scale orodol 23-45 5-chanoel$ 400 No169 t3onnpplooe 90 oeroioo forood oabin nodal kit front Il$ 400 No 193 StIletto CL Stont roodal MoGonald oinnor 15761980 $ 375 No229 010 RoIloblo RC 70 oorsioo 0128 old-tiorer REM contrc$ 425 No262 Crooltorootor CL orosh-prool froinor Two saest 530$ 125 No 302 MIol F16 RC Sorpolos 009 doofed 100 sport thor 2 ohOnnel 60100 wings tOil 004 fonnlogo oflooforo$ 360 No3101938 Ff009 Sf plan 90 Sport Soolo 3544 powor old 4-ohotool Sports 5610 o 2 plan Ohoots$ 025 No 314 00k III 90 Ken WillorIt s flying boot 30500001 15 power Fly front food wifhr 0000910 goor$ 275 No326 Taylor Cob 9C Don Sbus Sohoofyord Scale 040 powot 2-3 ohonnof Spoon 1 in$ 350 No322 Zephyr RC 0100ff 2-ohonnol Glider hond-loonoh tow thonnol 01 5lOpe 000009$ 200 No 366 Laser 260 90 Sport Soolo replioo ohowpionOhip AOrObOho flier 40 power 4-5 ohoenol 2 pfon shoofo$ 1075 No 447 1/2A Miss Asrdea 90 Old tinter ISA Teoooo 100401 rl--$ 650 No 639 Slesfiar SlOst-MortIno 19 RC Tailloso flying wing 15 power Spono 00 30500001$ 350 No 991 S. Boo Modol Y 90 Golden Age 90001 Spono 72-in l~ t 00$1175 No686 Modoh 90 Slopo-Sworing Soilylono Spoon 41 in. 260 oh0 425 90096 CorosOt 190 90-Asolof 51 4-tinter onlorgod 150% Spans 7$ 850 No663 Sperrow 600k F-30 FF Contpostioo robber-power plono woo$ 225 No66047166 RC Spoelal 90 AeroSotlo spon plone fordS power Sp$1075 No664 TOrOeOat 90 TreinorlSpodsfer styled oher Ff4 Spoen 60 r 25 No664 Staggorwleg Baoeh 3090000190 Sohoolyord-Soole bi-wing Spodotor 045 power Spots 32 le$ 375 No666 Poller 90 Fooorntypo sport piano 2-or 4-oyole power Spoon 60105 725 No 700 Randys 010090 OOOlOntiOal oorsohle Spod Troiner 14001 fortS power Weighs 33-00 Spans 25410$ 575 No 701 Jasopin Gee 90 045 porloenanoe Spodofer designed foe fly 000010 WeIghs 3-lb 5P005 4010 40-45 powot$ 725 No702 HaIskol 86 161FF Soole 1004010119240011000 wonoplarto HiLino Mlni-6 geored eleotrin 10010r SpotwOfi 10$ 260 No790 ZeOON FF Hond-LOonoIr Glider notinoC oonrpOtitiOO Wing DT Spoon 1810. 35138 growsS 200 No710 0010kb 36090 Pylon loner end Sport flier intosOOdiOtO boiltiorllllier Con toned CL 9000 ponoor Foow wing spoon 45100 550 No711 Fokker 611 Typo FF ROG Robbsrpowered Ontdoor Stick wodel Rowinionont 0150061 GonnOn Ightor Sonoes 23510$ 200 No712 V1st 664190 L9OTP 90 5po0 50010 version Finnish Vinbe 10ilOoty trainer Goadra Zenooh poster SpaO5 5410 2 $100 sheets .. $ 1500 No714 Mod Seek 90 anerf8ondly Spoc flier relaned 010w flight Enoolo 0110w slow 10000000w 25-30 poster 59005 6011 2 pbon sheets$ 900 No715 Stephoes Aoro 90 Gcartorscalo osrobatin piano opens 72510 noes 75150 power 2 plan 090010$ 1375 No716 Slow Pokar FF flooord-seOing 1014001 HLG spoon 245 Wood ofrootoro reinforoed wiOr 001500 fiber0 200 No717 Seetlan RC Cetokal PIano 60 SporsiooroSot 1110111010 Rassia br 3500 008100 3-o00000s spoon 475-in5 575 No716 LIt BIpo 90 Very oorobe0o lcnfly bipo dooign JOhO Hanfor SPOOn 88510 1013040 power 2 pioe sheets5 600 No719 Ada 90 ElectOn podonnanoolspod glider 96-direot-ddoe wotOr Foot ohonnolO Spans 6910 VoyabI flop snytow 2 p100 sheets5 725 No 720 MissSeosae FF FrOnk 70100 popalor oll-Solso-oooestd robbsrpowolOd wodel taken front PopolarSoieene JO00 f 541 Spoon 20105 200 No 721 LII Feller 90 widwing fonly sport plane Folly serobotlo 4Ohonnel canfrol FordS-St power Spons 48-10$ 600 No722 Losep M9/2 FF Goablod 700g-in row Oostonion design Mini-6 trotor old 55 10AH 9000005 SPOOn 1511-in$ 225 No723 Aol 07 CL Designed Polond P1011 Zawada 016010 Poonee Intended Shod Aerobatics Profiront FortS power Spoon 3fl1-in$ 400 No724 60001 Woapes 90 Giant Scale wid-wing aerobotic ship token front 0601001 1947 Stool design Spoon 60-in 2 plen shoots$1600 No725 CardInal fifi CL StonIer 060010040 60s fires 4 Stont shipo 60Cr OwaldOd 20 appeoronne points Spoon 621-in 60 power.. 51125 No 726 010-Ak-Do 90 ElooOc-powerod lightweight Cessna lookalike 0101 P01035 10010r 8-nell pock Spoon 52V410 2 plon sheets$1125 No 727 0091. XF7C Seahawk CL walti-porposo bi-winger Can onropefe beth Protile Scab sod Sony Canier Spoon 33-in 35140 power$ 460 No728 ElectrIc 006116 490 FF Ff00140 onnoewion Con 5000111 fl-cell Class 017-nell Oloon 6 Spoon 901010 AwIrof file 030009011 wtr$ 725 No 729 TigorCat 90 P100180 73-in-spon ecolotior 01 TigerfiSeo Low-wing sportloorobatlo 00001160100101 sod 2fl 1200 MW cells 2 plon shIn$1400 Ne 730 Snapper CL Protle stonIer based cloonic 1954 IsA Snapper 4811s-iosyon widwing 25-30 power$ 050 No721 FoalIrer Merchant FF Old-Tiwer 101FF 90 AroloL 73 oponiSs power boot fly occeytloonIly wide stall toleronne 2 p100 shoots$ 1095 No722 LOOO-WIsgArfa Loog-wing yl00 9310 spon IcrARIA 90 sport Slider Wing p100 reqoites plan 718 1 plan shoot8 470 Na 7321941 Toylerorafit 90 qooOer-noOlo design 04010100 oniqae flying goolitios 01150 loli-twale Tayisroraft 109-iooh span 2 plon sheets01450 No724 Seslpe 90 4-noale test wodel 76-irch spon $ 1550 No73536 SpecIal CL 40-powered bipiono stool rood ken0 400 No736 Test II FF101 Ostdoor HLG coropotifion t8inc 100$ 155 No737 P40 JN-l 30900001 90 sport desion 10115 0091005 spans 001$ 475 No738 MInI-stIOIMAX FF Rohber Scab vowioc loll-sloe oltrolighI SPOI 10247$ 100 No739 Jooster 90 Sailplane has looks podoononne 122-inoh spon 10010400 toll canstrostlon test 3 p1w sheets$1475 No 749 No0908 CL Nostalgo Slont Gpdot 04 version 1960 Notsobard design has 5612$ 7SS No741 WhIt ElocIdelas90 EleoldO OS 1001010 last ond ntoneooeroble Spon 3$-ot$ 500 No74240 FlyIng AeOs Oflek P100160 winatore oewlon 01 Old-Tinter design 1 shoot 0009 100 No749 RC Boreahe All-shoot scaled-op 001010001FF HLG 1 sheet spans 6010$ 475 No744 CL Falooe 49 Spod stonIer based Dahe Fcc design 2 sheets spoon 5511410$1060 90749 SenIor Slow MotIon Enlarged vention fill Evans 90 design hon 64-inch wiegnyar 5400010 area$ 575 No74490 Konsaa CIty Clipper PP design 110101537 adopted 1090 T$1760 60747FF 6041-$ 475 No746 Bowdon 1tsr$ 850 No 740 lstpela-B- -$ 5S0 No750 BoeIng F$ 1450 Ne 751 BIC So Long FF014-Tinter ForstOr 1$ 700 No752 Meeter paddle 90 P100110 seaplane fo$ 670 No 703 Cosene BIrd Do4Profile Soale 0010100 Tee 000051 power0 500 No 754 SIrraiGlfnnor Spoolal 9ohber CL trainers poolS 0011db$ 225 Full-size plan list available Complete listing plans previously published magazine through no 730 may obtained free charge writing enclose 52 stamped pre-addressed #10 business-size letter envelope ModelAviat ion 5151 E Memorial Dr Muncie IN 47302 [v32][b-1-10-1-10]]1 rCircle numbers plans wish order besf hsnding pesse nokide requeSt SOrPe other Service psns order No phone orders Cs) 317 289-4236 order assistance ONLYI 136169193225262302310314326332386447539581I 588598603650654684686700701702705710711712I 714715716717718719720721722723724725726727I 728729730731732733734735736737738739740741I 742743744745746747748749750751752753754755I Plan price includes first class postage US delivery Air Mail over 300 miles ase No COD Orders Make check money order payable US funds drawn US bank Model Aviation 0/0 AMA 5151 East Memorial Dr Muncie IN 47302 Please allow 3 6 weeks deliveryI Please print carefullyEnclosed $____ ________ II NAME________AMA No _________ __________________ STREET-I CITY ________ ___________ . __ II STATE __________________________________________________ ___________________________ ZIP ______________________________________________________ orders non-US addresses please add $250 Air Mail postage handling plan L-I FF IndoouiTenny Continued page 154 angle prop centerline will become greater 900—clearly undesirable implication blades variable-pitch prop should built block pitch equal highest pitch prop will assume prop rotates low pitch blade hub tip washed out lower angle equivalent helical pitch pitch distribution can probably reduce required blade angle change needed effective energy extractionA similar analysis can made variable-diameter props major difference mathematical analysis chart retracted blade reduces pitch tip way hub Instead center blade doing pulling tips heavily loaded variable- diameter prop Keep Motors Clean photo shows Jim Clemrs solution keeping motors clean under difficult conditions two three-ounce bottles filled mild detergent solution other water After wiping motor down remove some lube dirt Jim puts motor detergent shakes bottle vigorously After similar treatment bottle water motor ready lubricated used again No Ouch Like anyone winds blast fairly often Jim Clem breaks some motors dont break motors arent winding enough photos shows modifies heavy work glove shield save skin Making 0-rings Another photo shows fixture eases 0-ring cutting consists wooden block aluminum faceplate block faceplate drilled snug fit plastic tube used source material strongest 0-rings Ive tried cut plastic push-up handles found orange sherbet treats found convenience stores fixture used way push tubing through faceplate just enough allow thin ring cut Next enough tube pushed through make 0-ring desired thickness Single-edge razor blades pressed flat against faceplate used make cut cut partway through opposite sides form 0-rings parallel sides Model Aviation Two-Meter Jouster$850 Smaller version popular RO sailplane Plan #739 weighs 38-40 ounces Compost 5Pe'J Metelz aooks Precioion lnsbssmessts 4LATHES complete Cetelog $250 CAMPBELL TOOlS CO 0 eMsolmaRoed Springfield OH 45505 A650fleeees6VLOODt0005e 922-6362