FREE FLIGHT OLD-TIMERS 11111 N MY LAST COLUMN said would show lay out propeller block rubber model wing areas 100-150 square inches diameter 12-15 inches about right 150-200 squares try 15-17 inches big ones 200-300 square inches want 17- 20-inch-diameter props want pitch/diameter ratio 121 131 talking about Old-Timers modem Mulvihills Wakes likely will use larger diameters Conscientious Objector Mulvihill example used propeller nearly half wingspan diameter special purposes pitch diameter ratios other above may wanted sport/duration/scale outdoor models data above good Okay know diameter multiplying diameter say 125 know pitch example will assume 15-inch propeller pitch will 15 x 125 1875lets call 19 Look up 19 table numbers Figure 1 see 19 pitch get magic number 302 Lets reasonable call three number radius inches blade angle will 450 Now remember what 450 triangle has has two equal sides have oneinch-thick block draw X such way one-inch-wide point radius three inches have prop blank has 18-inch pitch carving block important back face blades will awfully wide tip before adding actual blade shape want otherwise will lose helical pitch have worked get Once back face done like cut blade pleasing shape make paper tracing transpose other blade carve front face blades thing wrong method wastes lot wood way reduce waste cut block width such Xruns off edges 50% radius taper thickness 50% tip practice sometimes block layouts point lines ran off say 80% radius just estimated 20% thickness taper graduate looks about right school engineering good math would have engineer anyway settle MDit pays rent suggest bit trial error ruler paper find propeller example 1 x 25-inch block 15 inches long will yield X-blank like want could use 1 x 2 cut bigger block down size want blade area need thicker block like 15 inches 450 point must still three inches block has wider accommo date X 15 inches width threeinch radius X-block method does work very nicely smaller props bigger sizes waste lot wood avoid block usually sized trial error X fits half radius thickness tapered keeping width same point look ready-to-cut blanks Oldtimer Model Supply will see just have copy fine article Bob Hatschek gives table numbers laying out almost prop might want 10- 30-inch diameters 1 x 2 block will provide copy usual SASE loose stamp pay copy costs article published 1965 American Modeler Annual access magazine collections review lot books column because no way will ever have space tell you need know very best Bill McCombss Flying aM imp roving Scale Model Airplanes has out print back revised edition some added material argument Bill about title book guess since its 25 VI LIk1 Modfied b4ock X-Block 110 Model Aviation e numbers useful layout propeller blocks see text desired helical pitch shown inches corre sponding number radius inches angle will 450 Layouts 15-inch-diameter 19-inchpitch prop described text Modified X-block wastes less wood Mik Mikkelsons Gordon Light-designed Miss America SAM Jim Duckworths balsa aluminum paper dummy GHQ Commercial event dates 1933 Mikkelson photo weighs 36 grams See text price address book gets name point whole lot data applies models just scale builder duration models either modem Old-Timer will find much very valuable very solid clearly written data $1495 have earlier edition can get updates $395 Order Aircraft Data PO Box 763576 Dallas TX 75224 book has excellent chapter propellers appendix propeller block layout An example Bills clear writing style can found article Vertical Tail Size Models March April 1992 issues Model Aviationhighly recom mended reading bell tolls thee article applies models Another book has out print Bill Hannans Models Musings now available Hannans Runway PO Box 210 Magalia CA 95954 Tel 916 873-6421 I am sure its also available Peck-Polymers other distributors book simple just-for-fun projects small inexpensive stick-and-tissue rubber-powered models now have three editions book design two previous edition deleted make room new plan two general just what needed introduce child grandchild fun simple models fly Sadly rubber-model kits available dealers shelves too complex too heavy wont fly farther can throw models will flyI guarantee Price $1295 plus $3 postage handling really interesting comparison Models Musings reprint 1935 book called Building Model Airplanes Fly Edwin T Hamilton first editor Model Airplane News magazine book shows make 10 planes all-sheet construction rubber powered though some gliders some stick-and-tissue Most about 24 inches span very flyable designs various ROGs twin pushers look like real fun twin pusher tissue covering looks competitive duration also twin pusher speed model single pusher canards lots other types book now being offered sale reproduction original reprinted photocopied $795 John J Frost Sons PO Box 1173 Covington LA 70434 Tel 504 892-5804 Frost has also reproduced Megows ABCs Model Airplane Building $395 am sure about date back says send five cents big new illustrated catalogthat should give some idea John Frost also has some interesting plans including group WW designs used Califomia Model Co kits SE-5 Spad Nieuport 17 Fokker DVII Continued page 179 PO Box16621 Irvine CA 92714 714 250-1107 714 250-0307 FREE FRONIC PRODUCTSI 5th AnnIversary Special Discount Pricing BARY MAI4AGEMENr SYSTEM ONE mosfet nicad cycler NOiliT nl qde~domlgoed apedilodly pisom bode mid heilcoplec. wW B ovmd0iiblode oibb1e dw0ng 1 9 caMe ieljmtable RI ovan10t dumue auTent foe ability dhechaUS bad RI md mid dlt dladiarge Mow Mod will charg 17 holes mod diem matomedwily awild die todd ide RI p op 2000 mAlt may charged ik dhidarge S md 9 Ccl pildie et 500 mA RI ouutwi dediecile 4 md 5 cal 00 500 mA Iklq.e CAMflY CALCUlATOR eflosm m191m.perhour ruIng bdetin detecuiloed Maoe9me.t 5don necuimi lce $19995 .. Amilvaumy Spedel $15999 RAPID NICAD ChARGER field charging nicads mIjodabie 100% Cqe MO5CT Held 4mdilMilodXdbdo luff ma dd1e 10tor 12 CAWaTY Vdm1OUr ThE CAR 1ONlE 3Ml Automeda Voltage Samlog denilby will lr*inkde die f dlinge md USe wIN bubble dde Sepecete RI mid 1 oorat adjimboecub allow fed draio9 olcade hi ex 1200 mAll empmdty mId die ability imed e blddrdovanW*dMot 12 V paver eupply lid quit mid fon4lyma helcopta 1/4 mode bode mid dam Rapid ficad - $7495 .. Anolveinwy Spedml $5995 GLOW SWffCH SYSTEM MKH board glow driver Allose mid odor 2 mod 4 oke aunee hnlnge pnblauidaloee diet have rou bile reAm run et low apeed J dme back mid Hip die prop lid lmwAed cowled md Jet enm butallallona wIld die plug hi iMilailt cowl. wuhpUOlOW md WHAT detedoca will ebowyon via LW did 010w 0n95 Switch Sdeu UL1IIAFT CONTROLLERISMART SWrrCII motor controllers Both unha deigned cosol elecOic motora ime_exbe dildent NOSPRYR dibly low vobdmA ddedable DEC allows die motor pack ahio powor die defedabie Low Voltage Qitoff abide dow. die baltay readien il vaMe liburet Coobuilor hi 111011 rde rn conbuilor ran limeS il 13 cek S 6200 lIz mwltcJbil ftequmq provide Sinew rapoeme edrandy mioodi aeusllon bI0aor dfldmey mid 1am n hemilog dim othor aidb LUrsPet Coidroilor moimml pdce $9995 .. Annivoremy Spedal $7995 Smect Switch hi deigned tonI mi dechlc motor off can hmdle 9 di 10 caMe md moftt chuilt reduce motor mid modal torque e doing powor op Smumt Selid noemi lelca $5095 Aoudvasmy Spedal $4095 RK ELECtRONICS $ Fm 3 em 11ev Ume 08001 603-882-0022 WORLDS LARGtST SCALE PLANS & DOCUMENTATION StRVct July1993 111 roduum SYSTEM CIfl new fully automatic baggIng System IS completely Self monitoring has fully adjustable vacuum switch large capacity reservoir prevents frequent cycling vacuum pump Auto-Vac kit comes completely assembled mounted wood base ready use Included kit E-Z Vac II electri pump rated 24 Hg adjustable vacuum switch vacuum gauge large capacity reservoir check valve neoprene tubing E-Z Vac connector two Quick-Lock seals 9 18 wide bagging tube 9 15 wide breather cloth set vacuum bagging instructions 100000 AIRCRAFT PHOTOS PLANS ENLARGING 130 SCALE PLANS ze 120 PAGE CATALOG $500 USA & CANADA $1000 AIR OVERStAS Jim Pepmos SCALE PLANS AND PHOTO StRttCE 3200 MADISON AVE GREENSBORO NC 27403 292-5239 Premld Ordere Money Cider Ceiltied Check oct10 Ralph Keyslay Shopg no charge COD Ordmna Cash CarlMimi Check coleoted ielioeiy Add $100 km dove ernoonte R4CrOEY DflCF WY J Pilca md Spedilcalloew Sultied UMoak 1109Cc Ded md Mmufadwed hI die WA RD 40383 SAMS MODELS England NEW Scale Free Flight Kits harder Hart CLA5SIC HAWKER HART24-3/4$2195 also available Lockheed FII7A21long$1495 Spitfire Mk 22 24l/2$1995 add $7 airmail SAMS Chapel Sandon Buntingford Herts SG9 OQJ England GASPARIN C02 Molars now SAMS Note US Checks & Stamps valid UK VISA & Mastercard accepted s-bills jets up Inunder6O colors pafls ajetom seconds No ropes logoe leitenog available no assembly Although EP usually smooth-flying helicopter ran vibration blade tracking problem high head speed 1800 rpm traced blade grips blade grips attached head single screw very tight loosened trifle blade grip could rotate slightly lead/lag cured problem modifications Concept EP has able provide solid two minutes max performing flight including loops rolls flying inverted make sure flight time exceeded set timer go off after two minutes got ground right away because wasnt much hattery reserve Also after talking others race cars familiar care feeding high charge discharge batteries found best completely discharge batteries before charging together SR Smart Charger gave us power could put SR packs Although electric helicopters arent everyone challenge can give very acceptable aerobatic performance next step meet MITs goal judge small piece sky can use loop rollwith objective eventually performing maneuvers indoors experiments big mainframe computer will have brought outdoors helicopter virtually impos sible helicopter will have go indoors computer will mean getting maneuverability can EP possibly developing some new different flying techniques Naturally have ideas welcome Ill keep posted progress ld-Timers/Baker Continued page 111 Price $6 fine-looking plans should good CO2 well rubber mini-electric Also available $150 1947 MAN plan twin-boom pusher tiny CO2 motors Howard McEntee 12-inchspan Fleet Trainer Megow also GLIDERS really know what youre doing MODEL SAILPLANES MYTH MAGIC Tony Upso no Math either Laymen Wives Lovers 170 readable pages $1895 plus $300 S&H Beefsteak Mines Ltd Box 1645 Jackson Wy 83001 FAX 307 733 7153 write fax brochure $150 sure enclose postageI am sure will refund extraor send SASE get complete list postage data WW plans look like would enlarge nicely drawn 3/4-inch-tothe-foot scale run about 20 22 inches span show K&B 020 power show priotwood patterns months photos shows balsa aluminum paper dummy GHQ engine produced Jim Duckworth Weight 36 grams engine could attached electric Old-Timer model wish photo colorthe details finish great Price $25 Jim Duckworth 123 Forest Lake Dr Warner Robins GA 31093 Thats room get Keep cards letters coming Next column will cover some frequently asked questions ndoor/Tenny Continued page 113 MarylandGoddard NAS Goddard NAS record trials flying sessions scheduled auditorium Building 8 Goddard NAS Saturdays 11 am till 1030 pm June 26 July 17 Sept 11 Sept 25 Oct 9 Oct 23 Nov 6 1992 Sanctioned national FAI record trials Sept 11 Sept 25 Oct 9 Oct 23 Nov 6 NASA security requires attendees US citizens AMA members licenses available inspection gate list compiled Tom Vallee must notify Tom intention attend advance meet Changes NASA launch schedules other possible events can preempt use auditorium much warning sure verify date Tom before leave home Tom Vallee 444 Henryton South Laurel MD 20707 Tel 301 498-0790 New JerseyLakehurst New dates Lakehurst #1 under negotiation press time Contact Gary Underwood address shown below find dates decided upon general dates expected almost weekly #1 Use Electric Connector Ar44t A'mAnS Rates tO Amps 600 V DC Ererincal Renstance 250 M crohnn Modular Cooranees naP op 1 Sermos Super Connector Lifetime Guarantee $500 per packet 2 Sermos Super Charging Jack Lifetime Guarantee $550 per packet 3 Sermos Standard Connector $400 per packet 4 Sermos Standard Charging Jack $450 per packet 5 Sermos Standard Arming Switch $400 per packet 6 Sermos insertion & Extraction Toot $800 per tool Mimiman Order $1 500 PLUS $200 Shipping Handeling Oniy Certified Checks Mosey Orders accepted payment orders Distributors Dealers Inquiries Invited Please call 203 322-8294 farther information Sm9S R/G SNAP CONNECTORS INC Cedar Corners StatIcs Box 16787 Stamford CT 06905 FOR THREADED CYLS AND COVERS FOR SPITFIRE CYKE BROWN AND BUNCH OTHERS BY REQUEST FOR FULL INFO WRITE BOB MCCORD 325-93 SYLVAN AVE MTN VIEW CALIF 94041-1640 July1993 179
Edition: Model Aviation - 1993/07
Page Numbers: 110, 111, 179
FREE FLIGHT OLD-TIMERS 11111 N MY LAST COLUMN said would show lay out propeller block rubber model wing areas 100-150 square inches diameter 12-15 inches about right 150-200 squares try 15-17 inches big ones 200-300 square inches want 17- 20-inch-diameter props want pitch/diameter ratio 121 131 talking about Old-Timers modem Mulvihills Wakes likely will use larger diameters Conscientious Objector Mulvihill example used propeller nearly half wingspan diameter special purposes pitch diameter ratios other above may wanted sport/duration/scale outdoor models data above good Okay know diameter multiplying diameter say 125 know pitch example will assume 15-inch propeller pitch will 15 x 125 1875lets call 19 Look up 19 table numbers Figure 1 see 19 pitch get magic number 302 Lets reasonable call three number radius inches blade angle will 450 Now remember what 450 triangle has has two equal sides have oneinch-thick block draw X such way one-inch-wide point radius three inches have prop blank has 18-inch pitch carving block important back face blades will awfully wide tip before adding actual blade shape want otherwise will lose helical pitch have worked get Once back face done like cut blade pleasing shape make paper tracing transpose other blade carve front face blades thing wrong method wastes lot wood way reduce waste cut block width such Xruns off edges 50% radius taper thickness 50% tip practice sometimes block layouts point lines ran off say 80% radius just estimated 20% thickness taper graduate looks about right school engineering good math would have engineer anyway settle MDit pays rent suggest bit trial error ruler paper find propeller example 1 x 25-inch block 15 inches long will yield X-blank like want could use 1 x 2 cut bigger block down size want blade area need thicker block like 15 inches 450 point must still three inches block has wider accommo date X 15 inches width threeinch radius X-block method does work very nicely smaller props bigger sizes waste lot wood avoid block usually sized trial error X fits half radius thickness tapered keeping width same point look ready-to-cut blanks Oldtimer Model Supply will see just have copy fine article Bob Hatschek gives table numbers laying out almost prop might want 10- 30-inch diameters 1 x 2 block will provide copy usual SASE loose stamp pay copy costs article published 1965 American Modeler Annual access magazine collections review lot books column because no way will ever have space tell you need know very best Bill McCombss Flying aM imp roving Scale Model Airplanes has out print back revised edition some added material argument Bill about title book guess since its 25 VI LIk1 Modfied b4ock X-Block 110 Model Aviation e numbers useful layout propeller blocks see text desired helical pitch shown inches corre sponding number radius inches angle will 450 Layouts 15-inch-diameter 19-inchpitch prop described text Modified X-block wastes less wood Mik Mikkelsons Gordon Light-designed Miss America SAM Jim Duckworths balsa aluminum paper dummy GHQ Commercial event dates 1933 Mikkelson photo weighs 36 grams See text price address book gets name point whole lot data applies models just scale builder duration models either modem Old-Timer will find much very valuable very solid clearly written data $1495 have earlier edition can get updates $395 Order Aircraft Data PO Box 763576 Dallas TX 75224 book has excellent chapter propellers appendix propeller block layout An example Bills clear writing style can found article Vertical Tail Size Models March April 1992 issues Model Aviationhighly recom mended reading bell tolls thee article applies models Another book has out print Bill Hannans Models Musings now available Hannans Runway PO Box 210 Magalia CA 95954 Tel 916 873-6421 I am sure its also available Peck-Polymers other distributors book simple just-for-fun projects small inexpensive stick-and-tissue rubber-powered models now have three editions book design two previous edition deleted make room new plan two general just what needed introduce child grandchild fun simple models fly Sadly rubber-model kits available dealers shelves too complex too heavy wont fly farther can throw models will flyI guarantee Price $1295 plus $3 postage handling really interesting comparison Models Musings reprint 1935 book called Building Model Airplanes Fly Edwin T Hamilton first editor Model Airplane News magazine book shows make 10 planes all-sheet construction rubber powered though some gliders some stick-and-tissue Most about 24 inches span very flyable designs various ROGs twin pushers look like real fun twin pusher tissue covering looks competitive duration also twin pusher speed model single pusher canards lots other types book now being offered sale reproduction original reprinted photocopied $795 John J Frost Sons PO Box 1173 Covington LA 70434 Tel 504 892-5804 Frost has also reproduced Megows ABCs Model Airplane Building $395 am sure about date back says send five cents big new illustrated catalogthat should give some idea John Frost also has some interesting plans including group WW designs used Califomia Model Co kits SE-5 Spad Nieuport 17 Fokker DVII Continued page 179 PO Box16621 Irvine CA 92714 714 250-1107 714 250-0307 FREE FRONIC PRODUCTSI 5th AnnIversary Special Discount Pricing BARY MAI4AGEMENr SYSTEM ONE mosfet nicad cycler NOiliT nl qde~domlgoed apedilodly pisom bode mid heilcoplec. wW B ovmd0iiblode oibb1e dw0ng 1 9 caMe ieljmtable RI ovan10t dumue auTent foe ability dhechaUS bad RI md mid dlt dladiarge Mow Mod will charg 17 holes mod diem matomedwily awild die todd ide RI p op 2000 mAlt may charged ik dhidarge S md 9 Ccl pildie et 500 mA RI ouutwi dediecile 4 md 5 cal 00 500 mA Iklq.e CAMflY CALCUlATOR eflosm m191m.perhour ruIng bdetin detecuiloed Maoe9me.t 5don necuimi lce $19995 .. Amilvaumy Spedel $15999 RAPID NICAD ChARGER field charging nicads mIjodabie 100% Cqe MO5CT Held 4mdilMilodXdbdo luff ma dd1e 10tor 12 CAWaTY Vdm1OUr ThE CAR 1ONlE 3Ml Automeda Voltage Samlog denilby will lr*inkde die f dlinge md USe wIN bubble dde Sepecete RI mid 1 oorat adjimboecub allow fed draio9 olcade hi ex 1200 mAll empmdty mId die ability imed e blddrdovanW*dMot 12 V paver eupply lid quit mid fon4lyma helcopta 1/4 mode bode mid dam Rapid ficad - $7495 .. Anolveinwy Spedml $5995 GLOW SWffCH SYSTEM MKH board glow driver Allose mid odor 2 mod 4 oke aunee hnlnge pnblauidaloee diet have rou bile reAm run et low apeed J dme back mid Hip die prop lid lmwAed cowled md Jet enm butallallona wIld die plug hi iMilailt cowl. wuhpUOlOW md WHAT detedoca will ebowyon via LW did 010w 0n95 Switch Sdeu UL1IIAFT CONTROLLERISMART SWrrCII motor controllers Both unha deigned cosol elecOic motora ime_exbe dildent NOSPRYR dibly low vobdmA ddedable DEC allows die motor pack ahio powor die defedabie Low Voltage Qitoff abide dow. die baltay readien il vaMe liburet Coobuilor hi 111011 rde rn conbuilor ran limeS il 13 cek S 6200 lIz mwltcJbil ftequmq provide Sinew rapoeme edrandy mioodi aeusllon bI0aor dfldmey mid 1am n hemilog dim othor aidb LUrsPet Coidroilor moimml pdce $9995 .. Annivoremy Spedal $7995 Smect Switch hi deigned tonI mi dechlc motor off can hmdle 9 di 10 caMe md moftt chuilt reduce motor mid modal torque e doing powor op Smumt Selid noemi lelca $5095 Aoudvasmy Spedal $4095 RK ELECtRONICS $ Fm 3 em 11ev Ume 08001 603-882-0022 WORLDS LARGtST SCALE PLANS & DOCUMENTATION StRVct July1993 111 roduum SYSTEM CIfl new fully automatic baggIng System IS completely Self monitoring has fully adjustable vacuum switch large capacity reservoir prevents frequent cycling vacuum pump Auto-Vac kit comes completely assembled mounted wood base ready use Included kit E-Z Vac II electri pump rated 24 Hg adjustable vacuum switch vacuum gauge large capacity reservoir check valve neoprene tubing E-Z Vac connector two Quick-Lock seals 9 18 wide bagging tube 9 15 wide breather cloth set vacuum bagging instructions 100000 AIRCRAFT PHOTOS PLANS ENLARGING 130 SCALE PLANS ze 120 PAGE CATALOG $500 USA & CANADA $1000 AIR OVERStAS Jim Pepmos SCALE PLANS AND PHOTO StRttCE 3200 MADISON AVE GREENSBORO NC 27403 292-5239 Premld Ordere Money Cider Ceiltied Check oct10 Ralph Keyslay Shopg no charge COD Ordmna Cash CarlMimi Check coleoted ielioeiy Add $100 km dove ernoonte R4CrOEY DflCF WY J Pilca md Spedilcalloew Sultied UMoak 1109Cc Ded md Mmufadwed hI die WA RD 40383 SAMS MODELS England NEW Scale Free Flight Kits harder Hart CLA5SIC HAWKER HART24-3/4$2195 also available Lockheed FII7A21long$1495 Spitfire Mk 22 24l/2$1995 add $7 airmail SAMS Chapel Sandon Buntingford Herts SG9 OQJ England GASPARIN C02 Molars now SAMS Note US Checks & Stamps valid UK VISA & Mastercard accepted s-bills jets up Inunder6O colors pafls ajetom seconds No ropes logoe leitenog available no assembly Although EP usually smooth-flying helicopter ran vibration blade tracking problem high head speed 1800 rpm traced blade grips blade grips attached head single screw very tight loosened trifle blade grip could rotate slightly lead/lag cured problem modifications Concept EP has able provide solid two minutes max performing flight including loops rolls flying inverted make sure flight time exceeded set timer go off after two minutes got ground right away because wasnt much hattery reserve Also after talking others race cars familiar care feeding high charge discharge batteries found best completely discharge batteries before charging together SR Smart Charger gave us power could put SR packs Although electric helicopters arent everyone challenge can give very acceptable aerobatic performance next step meet MITs goal judge small piece sky can use loop rollwith objective eventually performing maneuvers indoors experiments big mainframe computer will have brought outdoors helicopter virtually impos sible helicopter will have go indoors computer will mean getting maneuverability can EP possibly developing some new different flying techniques Naturally have ideas welcome Ill keep posted progress ld-Timers/Baker Continued page 111 Price $6 fine-looking plans should good CO2 well rubber mini-electric Also available $150 1947 MAN plan twin-boom pusher tiny CO2 motors Howard McEntee 12-inchspan Fleet Trainer Megow also GLIDERS really know what youre doing MODEL SAILPLANES MYTH MAGIC Tony Upso no Math either Laymen Wives Lovers 170 readable pages $1895 plus $300 S&H Beefsteak Mines Ltd Box 1645 Jackson Wy 83001 FAX 307 733 7153 write fax brochure $150 sure enclose postageI am sure will refund extraor send SASE get complete list postage data WW plans look like would enlarge nicely drawn 3/4-inch-tothe-foot scale run about 20 22 inches span show K&B 020 power show priotwood patterns months photos shows balsa aluminum paper dummy GHQ engine produced Jim Duckworth Weight 36 grams engine could attached electric Old-Timer model wish photo colorthe details finish great Price $25 Jim Duckworth 123 Forest Lake Dr Warner Robins GA 31093 Thats room get Keep cards letters coming Next column will cover some frequently asked questions ndoor/Tenny Continued page 113 MarylandGoddard NAS Goddard NAS record trials flying sessions scheduled auditorium Building 8 Goddard NAS Saturdays 11 am till 1030 pm June 26 July 17 Sept 11 Sept 25 Oct 9 Oct 23 Nov 6 1992 Sanctioned national FAI record trials Sept 11 Sept 25 Oct 9 Oct 23 Nov 6 NASA security requires attendees US citizens AMA members licenses available inspection gate list compiled Tom Vallee must notify Tom intention attend advance meet Changes NASA launch schedules other possible events can preempt use auditorium much warning sure verify date Tom before leave home Tom Vallee 444 Henryton South Laurel MD 20707 Tel 301 498-0790 New JerseyLakehurst New dates Lakehurst #1 under negotiation press time Contact Gary Underwood address shown below find dates decided upon general dates expected almost weekly #1 Use Electric Connector Ar44t A'mAnS Rates tO Amps 600 V DC Ererincal Renstance 250 M crohnn Modular Cooranees naP op 1 Sermos Super Connector Lifetime Guarantee $500 per packet 2 Sermos Super Charging Jack Lifetime Guarantee $550 per packet 3 Sermos Standard Connector $400 per packet 4 Sermos Standard Charging Jack $450 per packet 5 Sermos Standard Arming Switch $400 per packet 6 Sermos insertion & Extraction Toot $800 per tool Mimiman Order $1 500 PLUS $200 Shipping Handeling Oniy Certified Checks Mosey Orders accepted payment orders Distributors Dealers Inquiries Invited Please call 203 322-8294 farther information Sm9S R/G SNAP CONNECTORS INC Cedar Corners StatIcs Box 16787 Stamford CT 06905 FOR THREADED CYLS AND COVERS FOR SPITFIRE CYKE BROWN AND BUNCH OTHERS BY REQUEST FOR FULL INFO WRITE BOB MCCORD 325-93 SYLVAN AVE MTN VIEW CALIF 94041-1640 July1993 179
Edition: Model Aviation - 1993/07
Page Numbers: 110, 111, 179
FREE FLIGHT OLD-TIMERS 11111 N MY LAST COLUMN said would show lay out propeller block rubber model wing areas 100-150 square inches diameter 12-15 inches about right 150-200 squares try 15-17 inches big ones 200-300 square inches want 17- 20-inch-diameter props want pitch/diameter ratio 121 131 talking about Old-Timers modem Mulvihills Wakes likely will use larger diameters Conscientious Objector Mulvihill example used propeller nearly half wingspan diameter special purposes pitch diameter ratios other above may wanted sport/duration/scale outdoor models data above good Okay know diameter multiplying diameter say 125 know pitch example will assume 15-inch propeller pitch will 15 x 125 1875lets call 19 Look up 19 table numbers Figure 1 see 19 pitch get magic number 302 Lets reasonable call three number radius inches blade angle will 450 Now remember what 450 triangle has has two equal sides have oneinch-thick block draw X such way one-inch-wide point radius three inches have prop blank has 18-inch pitch carving block important back face blades will awfully wide tip before adding actual blade shape want otherwise will lose helical pitch have worked get Once back face done like cut blade pleasing shape make paper tracing transpose other blade carve front face blades thing wrong method wastes lot wood way reduce waste cut block width such Xruns off edges 50% radius taper thickness 50% tip practice sometimes block layouts point lines ran off say 80% radius just estimated 20% thickness taper graduate looks about right school engineering good math would have engineer anyway settle MDit pays rent suggest bit trial error ruler paper find propeller example 1 x 25-inch block 15 inches long will yield X-blank like want could use 1 x 2 cut bigger block down size want blade area need thicker block like 15 inches 450 point must still three inches block has wider accommo date X 15 inches width threeinch radius X-block method does work very nicely smaller props bigger sizes waste lot wood avoid block usually sized trial error X fits half radius thickness tapered keeping width same point look ready-to-cut blanks Oldtimer Model Supply will see just have copy fine article Bob Hatschek gives table numbers laying out almost prop might want 10- 30-inch diameters 1 x 2 block will provide copy usual SASE loose stamp pay copy costs article published 1965 American Modeler Annual access magazine collections review lot books column because no way will ever have space tell you need know very best Bill McCombss Flying aM imp roving Scale Model Airplanes has out print back revised edition some added material argument Bill about title book guess since its 25 VI LIk1 Modfied b4ock X-Block 110 Model Aviation e numbers useful layout propeller blocks see text desired helical pitch shown inches corre sponding number radius inches angle will 450 Layouts 15-inch-diameter 19-inchpitch prop described text Modified X-block wastes less wood Mik Mikkelsons Gordon Light-designed Miss America SAM Jim Duckworths balsa aluminum paper dummy GHQ Commercial event dates 1933 Mikkelson photo weighs 36 grams See text price address book gets name point whole lot data applies models just scale builder duration models either modem Old-Timer will find much very valuable very solid clearly written data $1495 have earlier edition can get updates $395 Order Aircraft Data PO Box 763576 Dallas TX 75224 book has excellent chapter propellers appendix propeller block layout An example Bills clear writing style can found article Vertical Tail Size Models March April 1992 issues Model Aviationhighly recom mended reading bell tolls thee article applies models Another book has out print Bill Hannans Models Musings now available Hannans Runway PO Box 210 Magalia CA 95954 Tel 916 873-6421 I am sure its also available Peck-Polymers other distributors book simple just-for-fun projects small inexpensive stick-and-tissue rubber-powered models now have three editions book design two previous edition deleted make room new plan two general just what needed introduce child grandchild fun simple models fly Sadly rubber-model kits available dealers shelves too complex too heavy wont fly farther can throw models will flyI guarantee Price $1295 plus $3 postage handling really interesting comparison Models Musings reprint 1935 book called Building Model Airplanes Fly Edwin T Hamilton first editor Model Airplane News magazine book shows make 10 planes all-sheet construction rubber powered though some gliders some stick-and-tissue Most about 24 inches span very flyable designs various ROGs twin pushers look like real fun twin pusher tissue covering looks competitive duration also twin pusher speed model single pusher canards lots other types book now being offered sale reproduction original reprinted photocopied $795 John J Frost Sons PO Box 1173 Covington LA 70434 Tel 504 892-5804 Frost has also reproduced Megows ABCs Model Airplane Building $395 am sure about date back says send five cents big new illustrated catalogthat should give some idea John Frost also has some interesting plans including group WW designs used Califomia Model Co kits SE-5 Spad Nieuport 17 Fokker DVII Continued page 179 PO Box16621 Irvine CA 92714 714 250-1107 714 250-0307 FREE FRONIC PRODUCTSI 5th AnnIversary Special Discount Pricing BARY MAI4AGEMENr SYSTEM ONE mosfet nicad cycler NOiliT nl qde~domlgoed apedilodly pisom bode mid heilcoplec. wW B ovmd0iiblode oibb1e dw0ng 1 9 caMe ieljmtable RI ovan10t dumue auTent foe ability dhechaUS bad RI md mid dlt dladiarge Mow Mod will charg 17 holes mod diem matomedwily awild die todd ide RI p op 2000 mAlt may charged ik dhidarge S md 9 Ccl pildie et 500 mA RI ouutwi dediecile 4 md 5 cal 00 500 mA Iklq.e CAMflY CALCUlATOR eflosm m191m.perhour ruIng bdetin detecuiloed Maoe9me.t 5don necuimi lce $19995 .. Amilvaumy Spedel $15999 RAPID NICAD ChARGER field charging nicads mIjodabie 100% Cqe MO5CT Held 4mdilMilodXdbdo luff ma dd1e 10tor 12 CAWaTY Vdm1OUr ThE CAR 1ONlE 3Ml Automeda Voltage Samlog denilby will lr*inkde die f dlinge md USe wIN bubble dde Sepecete RI mid 1 oorat adjimboecub allow fed draio9 olcade hi ex 1200 mAll empmdty mId die ability imed e blddrdovanW*dMot 12 V paver eupply lid quit mid fon4lyma helcopta 1/4 mode bode mid dam Rapid ficad - $7495 .. Anolveinwy Spedml $5995 GLOW SWffCH SYSTEM MKH board glow driver Allose mid odor 2 mod 4 oke aunee hnlnge pnblauidaloee diet have rou bile reAm run et low apeed J dme back mid Hip die prop lid lmwAed cowled md Jet enm butallallona wIld die plug hi iMilailt cowl. wuhpUOlOW md WHAT detedoca will ebowyon via LW did 010w 0n95 Switch Sdeu UL1IIAFT CONTROLLERISMART SWrrCII motor controllers Both unha deigned cosol elecOic motora ime_exbe dildent NOSPRYR dibly low vobdmA ddedable DEC allows die motor pack ahio powor die defedabie Low Voltage Qitoff abide dow. die baltay readien il vaMe liburet Coobuilor hi 111011 rde rn conbuilor ran limeS il 13 cek S 6200 lIz mwltcJbil ftequmq provide Sinew rapoeme edrandy mioodi aeusllon bI0aor dfldmey mid 1am n hemilog dim othor aidb LUrsPet Coidroilor moimml pdce $9995 .. Annivoremy Spedal $7995 Smect Switch hi deigned tonI mi dechlc motor off can hmdle 9 di 10 caMe md moftt chuilt reduce motor mid modal torque e doing powor op Smumt Selid noemi lelca $5095 Aoudvasmy Spedal $4095 RK ELECtRONICS $ Fm 3 em 11ev Ume 08001 603-882-0022 WORLDS LARGtST SCALE PLANS & DOCUMENTATION StRVct July1993 111 roduum SYSTEM CIfl new fully automatic baggIng System IS completely Self monitoring has fully adjustable vacuum switch large capacity reservoir prevents frequent cycling vacuum pump Auto-Vac kit comes completely assembled mounted wood base ready use Included kit E-Z Vac II electri pump rated 24 Hg adjustable vacuum switch vacuum gauge large capacity reservoir check valve neoprene tubing E-Z Vac connector two Quick-Lock seals 9 18 wide bagging tube 9 15 wide breather cloth set vacuum bagging instructions 100000 AIRCRAFT PHOTOS PLANS ENLARGING 130 SCALE PLANS ze 120 PAGE CATALOG $500 USA & CANADA $1000 AIR OVERStAS Jim Pepmos SCALE PLANS AND PHOTO StRttCE 3200 MADISON AVE GREENSBORO NC 27403 292-5239 Premld Ordere Money Cider Ceiltied Check oct10 Ralph Keyslay Shopg no charge COD Ordmna Cash CarlMimi Check coleoted ielioeiy Add $100 km dove ernoonte R4CrOEY DflCF WY J Pilca md Spedilcalloew Sultied UMoak 1109Cc Ded md Mmufadwed hI die WA RD 40383 SAMS MODELS England NEW Scale Free Flight Kits harder Hart CLA5SIC HAWKER HART24-3/4$2195 also available Lockheed FII7A21long$1495 Spitfire Mk 22 24l/2$1995 add $7 airmail SAMS Chapel Sandon Buntingford Herts SG9 OQJ England GASPARIN C02 Molars now SAMS Note US Checks & Stamps valid UK VISA & Mastercard accepted s-bills jets up Inunder6O colors pafls ajetom seconds No ropes logoe leitenog available no assembly Although EP usually smooth-flying helicopter ran vibration blade tracking problem high head speed 1800 rpm traced blade grips blade grips attached head single screw very tight loosened trifle blade grip could rotate slightly lead/lag cured problem modifications Concept EP has able provide solid two minutes max performing flight including loops rolls flying inverted make sure flight time exceeded set timer go off after two minutes got ground right away because wasnt much hattery reserve Also after talking others race cars familiar care feeding high charge discharge batteries found best completely discharge batteries before charging together SR Smart Charger gave us power could put SR packs Although electric helicopters arent everyone challenge can give very acceptable aerobatic performance next step meet MITs goal judge small piece sky can use loop rollwith objective eventually performing maneuvers indoors experiments big mainframe computer will have brought outdoors helicopter virtually impos sible helicopter will have go indoors computer will mean getting maneuverability can EP possibly developing some new different flying techniques Naturally have ideas welcome Ill keep posted progress ld-Timers/Baker Continued page 111 Price $6 fine-looking plans should good CO2 well rubber mini-electric Also available $150 1947 MAN plan twin-boom pusher tiny CO2 motors Howard McEntee 12-inchspan Fleet Trainer Megow also GLIDERS really know what youre doing MODEL SAILPLANES MYTH MAGIC Tony Upso no Math either Laymen Wives Lovers 170 readable pages $1895 plus $300 S&H Beefsteak Mines Ltd Box 1645 Jackson Wy 83001 FAX 307 733 7153 write fax brochure $150 sure enclose postageI am sure will refund extraor send SASE get complete list postage data WW plans look like would enlarge nicely drawn 3/4-inch-tothe-foot scale run about 20 22 inches span show K&B 020 power show priotwood patterns months photos shows balsa aluminum paper dummy GHQ engine produced Jim Duckworth Weight 36 grams engine could attached electric Old-Timer model wish photo colorthe details finish great Price $25 Jim Duckworth 123 Forest Lake Dr Warner Robins GA 31093 Thats room get Keep cards letters coming Next column will cover some frequently asked questions ndoor/Tenny Continued page 113 MarylandGoddard NAS Goddard NAS record trials flying sessions scheduled auditorium Building 8 Goddard NAS Saturdays 11 am till 1030 pm June 26 July 17 Sept 11 Sept 25 Oct 9 Oct 23 Nov 6 1992 Sanctioned national FAI record trials Sept 11 Sept 25 Oct 9 Oct 23 Nov 6 NASA security requires attendees US citizens AMA members licenses available inspection gate list compiled Tom Vallee must notify Tom intention attend advance meet Changes NASA launch schedules other possible events can preempt use auditorium much warning sure verify date Tom before leave home Tom Vallee 444 Henryton South Laurel MD 20707 Tel 301 498-0790 New JerseyLakehurst New dates Lakehurst #1 under negotiation press time Contact Gary Underwood address shown below find dates decided upon general dates expected almost weekly #1 Use Electric Connector Ar44t A'mAnS Rates tO Amps 600 V DC Ererincal Renstance 250 M crohnn Modular Cooranees naP op 1 Sermos Super Connector Lifetime Guarantee $500 per packet 2 Sermos Super Charging Jack Lifetime Guarantee $550 per packet 3 Sermos Standard Connector $400 per packet 4 Sermos Standard Charging Jack $450 per packet 5 Sermos Standard Arming Switch $400 per packet 6 Sermos insertion & Extraction Toot $800 per tool Mimiman Order $1 500 PLUS $200 Shipping Handeling Oniy Certified Checks Mosey Orders accepted payment orders Distributors Dealers Inquiries Invited Please call 203 322-8294 farther information Sm9S R/G SNAP CONNECTORS INC Cedar Corners StatIcs Box 16787 Stamford CT 06905 FOR THREADED CYLS AND COVERS FOR SPITFIRE CYKE BROWN AND BUNCH OTHERS BY REQUEST FOR FULL INFO WRITE BOB MCCORD 325-93 SYLVAN AVE MTN VIEW CALIF 94041-1640 July1993 179