Radio Technique. GeorgeMyers GEL CELLS lead-acid batteries Once have firmly mind un derstand must follow some simple rules use 1 Keep fully charged 2 Charge correct rates 3 Dont overcharge pay premium price something have already answer ques tion look battery charger field kit pants find corrosion peeled paint unexplained holes looking evidence fact sulfuric acid conventional wet leadacid batteries has habit getting out its shell least expect elec trolyte gel cell jellied sulfuric acid tends stay put other chemical reasons jellied electrolyte can sealed its little plastic box ever overcharge battery still evolves hydrogen oxygen gas pushes open resealable safety vent escapes no way put water back dont overcharge battery Most gel cells sold hobby made USA Globe Battery Div Globe-Union Inc Milwaukee WI registered trade mark gel/ cell Portable Battery Division Gould Inc St Paul MN use registered trademark Gelyte Bob Boucher Astro Flite Inc told hobby uses less days produc tion industry year Astro Flight Inc distributes wide se lection foreign domestic batteries sample shown Figure 1 Note both 6- 12-volt models offered variety terminations domestic batteries gel/cells East coast Gelyte batteries distributed MEN Norwalk CT Fig 2 Concepts Unlimited Bohe mia NY Fig 3 Both 6-amphour packages MEN batteries distributed separate 6-volt cells CU battery available 12-volt unit Both end pigtails MEN battery terminating Molex con nectors mating parts provided CU battery terminates Anderson con nectors mating parts provided above statements may change before published Ill have some terminations later column Charging Limit initial charging cur rent C/5 less 6-amp-hour pack figures out 6/5 12 amps fully discharged condition manufacturers recommend discharge limited less 175 volts per cell since 6-volt battery has three cells can see figures out minimum voltage 525 6-volt pack 105 12-volt pack case current will drop rapidly begin12 Model Aviation Fig 1 6- 12-volt gel cells available Astro Flight Inc large variety foreign domestic batteries offered sizes ana snapes suit practically purpose Since gel cells leadacid batteries some simple rules govern use text brings out Fig 2 Gelyte batteries available MEN 6volt 6amphour type Separated batteries helpful have 6-volt fuel pump other accessories Fig 3 Gelyte battery distributed Concepts Unlimited battery has Anderson Con nector rated 12 volts 6-amp hrs fling should keep charging until reach 24 volts per cell end-ofcharge voltage therefore 72 volts 6-volt pack 144 volts 12-volt pack end-of-charge voltage reached should maintain voltage until current drops 1 amp 6-amp-hour pack disconnect charger numbers give headache see Fig 4 MEN offers automatic voltage-cutoff charger 12volt packs means MEN packs must series charging Any connect little gem dis charged battery pack plug lOVAC house current red light comes its finished make sure charging really completed unplug charger wall plug again light comes back two minutes less youre done Simple enough Referring again 6-amp-hour size good electric starters Gould Gelyte battery manual states maximum continuous current should limited 15 amps avoid damaging battery overheating maximum pulsed current should limited 30 amps shown Fig 5 Now starter motor will draw 30 amps stall message should quite ... prime engine pull through compression couple times connect glow plug engage starter will insure dont stall starter motor event once learn start engine unlikely will put enough load battery damage contrary likely damage treating too gently discharged low rates active ma terial consumed shortens cycle life Work hard considera tion using gel cells past year weve learned start engines better wet cells because terminal voltage stays up longer Tested recom mended Myers whatever thats worth particularly enjoy freedom corrosion constant worry about upsetting wet cell Gel cells Continued page 84 30 AMPS MAXIMUM PULSED CURRENT 15 AMPS MAXIMUM CONTINUOUS CURRENT IJJJJ_ WIW WKL Fig 5 Duty cycle limits 6-amp-hour gel cells gel cell must rest balance 10minute period after being discharged limit rates time indicated Fig 6 Anderson Connector Kit distributed Concepts Unlimited has uses inside outside hobby Contacts snap shells contain dovetail tongue-and-groove fittings can assembled special plugs Lock place cyanoacrylic adhesive July1978 13 lig 4 MLN automatic charger cuts automaticaily approximately 145 volts can used charge gel cells wet lead-acid batteries Just set forget z Lii30 0 Lii D T , Cl lii w 0 0 12410 TIME AT LIMIT CURRENTMINUTES other guys like us newsletter being published rapidly growing mini-magazine concentrates type information darned hard come interested QSAA send double-stamped large self-addressed envelope Ill send copy first newsletter Remember Big Beautiful QSAA motto SOME SUPPLY SOURCES Kits 3-3 Champ Citabria Mr Mulligan several others Bud Nosen Models PO Bos 105 Two Harbors MN 55616 Several WWl types Aerotec Model Engineering Co Box 116 Lincoindale NY 10540 Engines Quadra 20 cid converted chain-sass engine ignition Most hobby sbops can order Fine Star Specialties 3125 wilkins way Carmichael CA 95608 EWH Specialties Inc. 607 E Abrams Suite 410 Arlington TX 76010 MRCSuevia 25cc 15 cid glo Schenerle ported Most bobby shops can order MRC 2500 woodbridge Ave. Edison NJ 08817 MOKI 25cc glow Most hobby shops can order imported Polks Hobbies Five Star Specialties Isee address above Webra 90 05 80 Fox 78 Pro6 76 order through hobby sbops Plans parts Specifically designed large engines -also parts accessories Quadra engines accessories 1/3rd Pitts & Kraft Super-Fli Big Arts Models 20620 Emmett Taylor MI 48180 33 Cuh 90 PBY Stinson Vovoger others Sid Morgau Plans 13157 Ormond Belleville MI 48111 Fairchild PT19 spec6cally Quadra Jim Folline Lee Taylor 329 C St Roseville CA 95678 Curtiss Hawk PhE Stinsor Reliant 5R9 Barronss Scale Classics 1213 Holly Spring Lane Grand Blanc MI 48439 Bob Holmar Plans PO Box 714S San Bernardino C 2 Old Time Plan Sers Jobe Pond PO Bus 3113 San Jose CA 9556 Lee Taylor 329 C St Roseville CA 95678 RC Technique/Myers continued page 13 can operated position Jerry Jarvis MEN has hint car boat helicopter drivers re gard limiting maximum current drawn Add flywheel starter spin up starter before engaging belt flywheel will store up some energy will give internal combustion motor just time peak energy demand takes some strain off battery gives stronger starting jolt Storage Gel cells store well Ive telling recharge nickle-cad mium batteries once month whether use Vince Calouri Boe ing Hawks told just last month talk given Hawks Boeing bat tery expert name carelessly got write down rate mes sage Put little load battery just before recharge optimum results Exercising RC system few minutes will sufficient re charge Now back gel cells Stored room temperature fully charged gel cell will drop half its capacity about nine months Thats pretty good So recharge stored gel cells twice year whether use Failure keep fully charged leads sulfation plates permanently reduces battery capacity Connectors If gel cell has tabs like some Astro Flight batteries Fig Radio Shack has push-on connector can installed wire just pair pliers Id give part number change too fast just look around among blister packs ask help Molex con nectors can sometimes found auto parts stores Fig 6 shows another alterna tive Concepts Unlimited 36C Carlough Place Bohemia NY 11716 distributing Anderson Power Products kit shown connectors mate Gelyte battery distributed CU UL Canadian standard certified contacts wipe together recommen ded both battery manufacturers shells color coded keyed sides can assemble just about kind special plug might want Use substitutes wire nuts installing electrical fixtures local wiring code permits simplify job lot No holding up fixture hand try turn wire nut other also work well making connections car like CB cuss cuss stereo See dealer first What else can tell about gel cells Keep cool operate range 40nF 140F trunk car gets up l40F hot sun temperature hastens self-discharge kinds batteries Gel cells rated 20-hour rate reason yield greatest ca pacity rate starter motor draws lot short time dont worry about Charge gel cell soon get because theres no way knowing left factory fully charged stored interim Capacity will crease during first few charge/dis charge cycles gel cell considered expended its available capacity measured 20-hour rate C/20 ps 6-amp-hour pack drops half its original value George M Myers 70 Froehlich Farm Rd Hicks yule NY 1180] Agrivation/Haught continued page 18 thoroughly Fit center ribs cutting out sec tions needed Install leading edge sheet ing center-section planking Shape sheet wing tips shown typical sec tion Cap tops ribs 2 strips Sand wing structure rounding lead ing trailing edge members final shape Cut ailerons trailing edge stock sand shape Install 3/32 wire horns Klett AB-4 bearings hinge wing Horns should bent forward shown insure up aileron travel down necessary insure smooth entry turns high lifting airfoil Fabricate plywood servo doubler fit servo used install shown Cut out planking accommodate servo Standard Du-Bro aileron linkage recom mended completes basic structure Give components final sanding proceed favorite covering finishing procedure iron-on coverings satis factory prefer traditional methods suggest fabric wings either ironed-on Coverite doped-on silk Silron doped-on Silkspan over bare wood parts Silkspan easily applied 75% thinner-25% dope mixture brushed through paper after preparing wood application two coats clear dope 84 Model Aviation 4 NE3Y KITS OF WORLD CLASSIC AIRCRAFT FROM ~LYLINE utlsi,tOnp,hO upRa,au,nAiid 2345RPRAdRI , EXiRla i,,,5 Run n2X p.$1295 XuXflb. PXR, Sig StO IXAL XiApe9 flIZhi XR5A P,r,XX Send 254 catalog See dealer oIl FLYLINEa cloaaic kita NOW FLYLINE MODELS INC 031 5734335 HEINKEL 1000 ninsata RAXR * flX3 RfRXR, XAA, PAR Rlii33XSIXOiPRX2X P32 Flu, PAhiin 12
Edition: Model Aviation - 1978/07
Page Numbers: 12, 13, 84
Radio Technique. GeorgeMyers GEL CELLS lead-acid batteries Once have firmly mind un derstand must follow some simple rules use 1 Keep fully charged 2 Charge correct rates 3 Dont overcharge pay premium price something have already answer ques tion look battery charger field kit pants find corrosion peeled paint unexplained holes looking evidence fact sulfuric acid conventional wet leadacid batteries has habit getting out its shell least expect elec trolyte gel cell jellied sulfuric acid tends stay put other chemical reasons jellied electrolyte can sealed its little plastic box ever overcharge battery still evolves hydrogen oxygen gas pushes open resealable safety vent escapes no way put water back dont overcharge battery Most gel cells sold hobby made USA Globe Battery Div Globe-Union Inc Milwaukee WI registered trade mark gel/ cell Portable Battery Division Gould Inc St Paul MN use registered trademark Gelyte Bob Boucher Astro Flite Inc told hobby uses less days produc tion industry year Astro Flight Inc distributes wide se lection foreign domestic batteries sample shown Figure 1 Note both 6- 12-volt models offered variety terminations domestic batteries gel/cells East coast Gelyte batteries distributed MEN Norwalk CT Fig 2 Concepts Unlimited Bohe mia NY Fig 3 Both 6-amphour packages MEN batteries distributed separate 6-volt cells CU battery available 12-volt unit Both end pigtails MEN battery terminating Molex con nectors mating parts provided CU battery terminates Anderson con nectors mating parts provided above statements may change before published Ill have some terminations later column Charging Limit initial charging cur rent C/5 less 6-amp-hour pack figures out 6/5 12 amps fully discharged condition manufacturers recommend discharge limited less 175 volts per cell since 6-volt battery has three cells can see figures out minimum voltage 525 6-volt pack 105 12-volt pack case current will drop rapidly begin12 Model Aviation Fig 1 6- 12-volt gel cells available Astro Flight Inc large variety foreign domestic batteries offered sizes ana snapes suit practically purpose Since gel cells leadacid batteries some simple rules govern use text brings out Fig 2 Gelyte batteries available MEN 6volt 6amphour type Separated batteries helpful have 6-volt fuel pump other accessories Fig 3 Gelyte battery distributed Concepts Unlimited battery has Anderson Con nector rated 12 volts 6-amp hrs fling should keep charging until reach 24 volts per cell end-ofcharge voltage therefore 72 volts 6-volt pack 144 volts 12-volt pack end-of-charge voltage reached should maintain voltage until current drops 1 amp 6-amp-hour pack disconnect charger numbers give headache see Fig 4 MEN offers automatic voltage-cutoff charger 12volt packs means MEN packs must series charging Any connect little gem dis charged battery pack plug lOVAC house current red light comes its finished make sure charging really completed unplug charger wall plug again light comes back two minutes less youre done Simple enough Referring again 6-amp-hour size good electric starters Gould Gelyte battery manual states maximum continuous current should limited 15 amps avoid damaging battery overheating maximum pulsed current should limited 30 amps shown Fig 5 Now starter motor will draw 30 amps stall message should quite ... prime engine pull through compression couple times connect glow plug engage starter will insure dont stall starter motor event once learn start engine unlikely will put enough load battery damage contrary likely damage treating too gently discharged low rates active ma terial consumed shortens cycle life Work hard considera tion using gel cells past year weve learned start engines better wet cells because terminal voltage stays up longer Tested recom mended Myers whatever thats worth particularly enjoy freedom corrosion constant worry about upsetting wet cell Gel cells Continued page 84 30 AMPS MAXIMUM PULSED CURRENT 15 AMPS MAXIMUM CONTINUOUS CURRENT IJJJJ_ WIW WKL Fig 5 Duty cycle limits 6-amp-hour gel cells gel cell must rest balance 10minute period after being discharged limit rates time indicated Fig 6 Anderson Connector Kit distributed Concepts Unlimited has uses inside outside hobby Contacts snap shells contain dovetail tongue-and-groove fittings can assembled special plugs Lock place cyanoacrylic adhesive July1978 13 lig 4 MLN automatic charger cuts automaticaily approximately 145 volts can used charge gel cells wet lead-acid batteries Just set forget z Lii30 0 Lii D T , Cl lii w 0 0 12410 TIME AT LIMIT CURRENTMINUTES other guys like us newsletter being published rapidly growing mini-magazine concentrates type information darned hard come interested QSAA send double-stamped large self-addressed envelope Ill send copy first newsletter Remember Big Beautiful QSAA motto SOME SUPPLY SOURCES Kits 3-3 Champ Citabria Mr Mulligan several others Bud Nosen Models PO Bos 105 Two Harbors MN 55616 Several WWl types Aerotec Model Engineering Co Box 116 Lincoindale NY 10540 Engines Quadra 20 cid converted chain-sass engine ignition Most hobby sbops can order Fine Star Specialties 3125 wilkins way Carmichael CA 95608 EWH Specialties Inc. 607 E Abrams Suite 410 Arlington TX 76010 MRCSuevia 25cc 15 cid glo Schenerle ported Most bobby shops can order MRC 2500 woodbridge Ave. Edison NJ 08817 MOKI 25cc glow Most hobby shops can order imported Polks Hobbies Five Star Specialties Isee address above Webra 90 05 80 Fox 78 Pro6 76 order through hobby sbops Plans parts Specifically designed large engines -also parts accessories Quadra engines accessories 1/3rd Pitts & Kraft Super-Fli Big Arts Models 20620 Emmett Taylor MI 48180 33 Cuh 90 PBY Stinson Vovoger others Sid Morgau Plans 13157 Ormond Belleville MI 48111 Fairchild PT19 spec6cally Quadra Jim Folline Lee Taylor 329 C St Roseville CA 95678 Curtiss Hawk PhE Stinsor Reliant 5R9 Barronss Scale Classics 1213 Holly Spring Lane Grand Blanc MI 48439 Bob Holmar Plans PO Box 714S San Bernardino C 2 Old Time Plan Sers Jobe Pond PO Bus 3113 San Jose CA 9556 Lee Taylor 329 C St Roseville CA 95678 RC Technique/Myers continued page 13 can operated position Jerry Jarvis MEN has hint car boat helicopter drivers re gard limiting maximum current drawn Add flywheel starter spin up starter before engaging belt flywheel will store up some energy will give internal combustion motor just time peak energy demand takes some strain off battery gives stronger starting jolt Storage Gel cells store well Ive telling recharge nickle-cad mium batteries once month whether use Vince Calouri Boe ing Hawks told just last month talk given Hawks Boeing bat tery expert name carelessly got write down rate mes sage Put little load battery just before recharge optimum results Exercising RC system few minutes will sufficient re charge Now back gel cells Stored room temperature fully charged gel cell will drop half its capacity about nine months Thats pretty good So recharge stored gel cells twice year whether use Failure keep fully charged leads sulfation plates permanently reduces battery capacity Connectors If gel cell has tabs like some Astro Flight batteries Fig Radio Shack has push-on connector can installed wire just pair pliers Id give part number change too fast just look around among blister packs ask help Molex con nectors can sometimes found auto parts stores Fig 6 shows another alterna tive Concepts Unlimited 36C Carlough Place Bohemia NY 11716 distributing Anderson Power Products kit shown connectors mate Gelyte battery distributed CU UL Canadian standard certified contacts wipe together recommen ded both battery manufacturers shells color coded keyed sides can assemble just about kind special plug might want Use substitutes wire nuts installing electrical fixtures local wiring code permits simplify job lot No holding up fixture hand try turn wire nut other also work well making connections car like CB cuss cuss stereo See dealer first What else can tell about gel cells Keep cool operate range 40nF 140F trunk car gets up l40F hot sun temperature hastens self-discharge kinds batteries Gel cells rated 20-hour rate reason yield greatest ca pacity rate starter motor draws lot short time dont worry about Charge gel cell soon get because theres no way knowing left factory fully charged stored interim Capacity will crease during first few charge/dis charge cycles gel cell considered expended its available capacity measured 20-hour rate C/20 ps 6-amp-hour pack drops half its original value George M Myers 70 Froehlich Farm Rd Hicks yule NY 1180] Agrivation/Haught continued page 18 thoroughly Fit center ribs cutting out sec tions needed Install leading edge sheet ing center-section planking Shape sheet wing tips shown typical sec tion Cap tops ribs 2 strips Sand wing structure rounding lead ing trailing edge members final shape Cut ailerons trailing edge stock sand shape Install 3/32 wire horns Klett AB-4 bearings hinge wing Horns should bent forward shown insure up aileron travel down necessary insure smooth entry turns high lifting airfoil Fabricate plywood servo doubler fit servo used install shown Cut out planking accommodate servo Standard Du-Bro aileron linkage recom mended completes basic structure Give components final sanding proceed favorite covering finishing procedure iron-on coverings satis factory prefer traditional methods suggest fabric wings either ironed-on Coverite doped-on silk Silron doped-on Silkspan over bare wood parts Silkspan easily applied 75% thinner-25% dope mixture brushed through paper after preparing wood application two coats clear dope 84 Model Aviation 4 NE3Y KITS OF WORLD CLASSIC AIRCRAFT FROM ~LYLINE utlsi,tOnp,hO upRa,au,nAiid 2345RPRAdRI , EXiRla i,,,5 Run n2X p.$1295 XuXflb. PXR, Sig StO IXAL XiApe9 flIZhi XR5A P,r,XX Send 254 catalog See dealer oIl FLYLINEa cloaaic kita NOW FLYLINE MODELS INC 031 5734335 HEINKEL 1000 ninsata RAXR * flX3 RfRXR, XAA, PAR Rlii33XSIXOiPRX2X P32 Flu, PAhiin 12
Edition: Model Aviation - 1978/07
Page Numbers: 12, 13, 84
Radio Technique. GeorgeMyers GEL CELLS lead-acid batteries Once have firmly mind un derstand must follow some simple rules use 1 Keep fully charged 2 Charge correct rates 3 Dont overcharge pay premium price something have already answer ques tion look battery charger field kit pants find corrosion peeled paint unexplained holes looking evidence fact sulfuric acid conventional wet leadacid batteries has habit getting out its shell least expect elec trolyte gel cell jellied sulfuric acid tends stay put other chemical reasons jellied electrolyte can sealed its little plastic box ever overcharge battery still evolves hydrogen oxygen gas pushes open resealable safety vent escapes no way put water back dont overcharge battery Most gel cells sold hobby made USA Globe Battery Div Globe-Union Inc Milwaukee WI registered trade mark gel/ cell Portable Battery Division Gould Inc St Paul MN use registered trademark Gelyte Bob Boucher Astro Flite Inc told hobby uses less days produc tion industry year Astro Flight Inc distributes wide se lection foreign domestic batteries sample shown Figure 1 Note both 6- 12-volt models offered variety terminations domestic batteries gel/cells East coast Gelyte batteries distributed MEN Norwalk CT Fig 2 Concepts Unlimited Bohe mia NY Fig 3 Both 6-amphour packages MEN batteries distributed separate 6-volt cells CU battery available 12-volt unit Both end pigtails MEN battery terminating Molex con nectors mating parts provided CU battery terminates Anderson con nectors mating parts provided above statements may change before published Ill have some terminations later column Charging Limit initial charging cur rent C/5 less 6-amp-hour pack figures out 6/5 12 amps fully discharged condition manufacturers recommend discharge limited less 175 volts per cell since 6-volt battery has three cells can see figures out minimum voltage 525 6-volt pack 105 12-volt pack case current will drop rapidly begin12 Model Aviation Fig 1 6- 12-volt gel cells available Astro Flight Inc large variety foreign domestic batteries offered sizes ana snapes suit practically purpose Since gel cells leadacid batteries some simple rules govern use text brings out Fig 2 Gelyte batteries available MEN 6volt 6amphour type Separated batteries helpful have 6-volt fuel pump other accessories Fig 3 Gelyte battery distributed Concepts Unlimited battery has Anderson Con nector rated 12 volts 6-amp hrs fling should keep charging until reach 24 volts per cell end-ofcharge voltage therefore 72 volts 6-volt pack 144 volts 12-volt pack end-of-charge voltage reached should maintain voltage until current drops 1 amp 6-amp-hour pack disconnect charger numbers give headache see Fig 4 MEN offers automatic voltage-cutoff charger 12volt packs means MEN packs must series charging Any connect little gem dis charged battery pack plug lOVAC house current red light comes its finished make sure charging really completed unplug charger wall plug again light comes back two minutes less youre done Simple enough Referring again 6-amp-hour size good electric starters Gould Gelyte battery manual states maximum continuous current should limited 15 amps avoid damaging battery overheating maximum pulsed current should limited 30 amps shown Fig 5 Now starter motor will draw 30 amps stall message should quite ... prime engine pull through compression couple times connect glow plug engage starter will insure dont stall starter motor event once learn start engine unlikely will put enough load battery damage contrary likely damage treating too gently discharged low rates active ma terial consumed shortens cycle life Work hard considera tion using gel cells past year weve learned start engines better wet cells because terminal voltage stays up longer Tested recom mended Myers whatever thats worth particularly enjoy freedom corrosion constant worry about upsetting wet cell Gel cells Continued page 84 30 AMPS MAXIMUM PULSED CURRENT 15 AMPS MAXIMUM CONTINUOUS CURRENT IJJJJ_ WIW WKL Fig 5 Duty cycle limits 6-amp-hour gel cells gel cell must rest balance 10minute period after being discharged limit rates time indicated Fig 6 Anderson Connector Kit distributed Concepts Unlimited has uses inside outside hobby Contacts snap shells contain dovetail tongue-and-groove fittings can assembled special plugs Lock place cyanoacrylic adhesive July1978 13 lig 4 MLN automatic charger cuts automaticaily approximately 145 volts can used charge gel cells wet lead-acid batteries Just set forget z Lii30 0 Lii D T , Cl lii w 0 0 12410 TIME AT LIMIT CURRENTMINUTES other guys like us newsletter being published rapidly growing mini-magazine concentrates type information darned hard come interested QSAA send double-stamped large self-addressed envelope Ill send copy first newsletter Remember Big Beautiful QSAA motto SOME SUPPLY SOURCES Kits 3-3 Champ Citabria Mr Mulligan several others Bud Nosen Models PO Bos 105 Two Harbors MN 55616 Several WWl types Aerotec Model Engineering Co Box 116 Lincoindale NY 10540 Engines Quadra 20 cid converted chain-sass engine ignition Most hobby sbops can order Fine Star Specialties 3125 wilkins way Carmichael CA 95608 EWH Specialties Inc. 607 E Abrams Suite 410 Arlington TX 76010 MRCSuevia 25cc 15 cid glo Schenerle ported Most bobby shops can order MRC 2500 woodbridge Ave. Edison NJ 08817 MOKI 25cc glow Most hobby shops can order imported Polks Hobbies Five Star Specialties Isee address above Webra 90 05 80 Fox 78 Pro6 76 order through hobby sbops Plans parts Specifically designed large engines -also parts accessories Quadra engines accessories 1/3rd Pitts & Kraft Super-Fli Big Arts Models 20620 Emmett Taylor MI 48180 33 Cuh 90 PBY Stinson Vovoger others Sid Morgau Plans 13157 Ormond Belleville MI 48111 Fairchild PT19 spec6cally Quadra Jim Folline Lee Taylor 329 C St Roseville CA 95678 Curtiss Hawk PhE Stinsor Reliant 5R9 Barronss Scale Classics 1213 Holly Spring Lane Grand Blanc MI 48439 Bob Holmar Plans PO Box 714S San Bernardino C 2 Old Time Plan Sers Jobe Pond PO Bus 3113 San Jose CA 9556 Lee Taylor 329 C St Roseville CA 95678 RC Technique/Myers continued page 13 can operated position Jerry Jarvis MEN has hint car boat helicopter drivers re gard limiting maximum current drawn Add flywheel starter spin up starter before engaging belt flywheel will store up some energy will give internal combustion motor just time peak energy demand takes some strain off battery gives stronger starting jolt Storage Gel cells store well Ive telling recharge nickle-cad mium batteries once month whether use Vince Calouri Boe ing Hawks told just last month talk given Hawks Boeing bat tery expert name carelessly got write down rate mes sage Put little load battery just before recharge optimum results Exercising RC system few minutes will sufficient re charge Now back gel cells Stored room temperature fully charged gel cell will drop half its capacity about nine months Thats pretty good So recharge stored gel cells twice year whether use Failure keep fully charged leads sulfation plates permanently reduces battery capacity Connectors If gel cell has tabs like some Astro Flight batteries Fig Radio Shack has push-on connector can installed wire just pair pliers Id give part number change too fast just look around among blister packs ask help Molex con nectors can sometimes found auto parts stores Fig 6 shows another alterna tive Concepts Unlimited 36C Carlough Place Bohemia NY 11716 distributing Anderson Power Products kit shown connectors mate Gelyte battery distributed CU UL Canadian standard certified contacts wipe together recommen ded both battery manufacturers shells color coded keyed sides can assemble just about kind special plug might want Use substitutes wire nuts installing electrical fixtures local wiring code permits simplify job lot No holding up fixture hand try turn wire nut other also work well making connections car like CB cuss cuss stereo See dealer first What else can tell about gel cells Keep cool operate range 40nF 140F trunk car gets up l40F hot sun temperature hastens self-discharge kinds batteries Gel cells rated 20-hour rate reason yield greatest ca pacity rate starter motor draws lot short time dont worry about Charge gel cell soon get because theres no way knowing left factory fully charged stored interim Capacity will crease during first few charge/dis charge cycles gel cell considered expended its available capacity measured 20-hour rate C/20 ps 6-amp-hour pack drops half its original value George M Myers 70 Froehlich Farm Rd Hicks yule NY 1180] Agrivation/Haught continued page 18 thoroughly Fit center ribs cutting out sec tions needed Install leading edge sheet ing center-section planking Shape sheet wing tips shown typical sec tion Cap tops ribs 2 strips Sand wing structure rounding lead ing trailing edge members final shape Cut ailerons trailing edge stock sand shape Install 3/32 wire horns Klett AB-4 bearings hinge wing Horns should bent forward shown insure up aileron travel down necessary insure smooth entry turns high lifting airfoil Fabricate plywood servo doubler fit servo used install shown Cut out planking accommodate servo Standard Du-Bro aileron linkage recom mended completes basic structure Give components final sanding proceed favorite covering finishing procedure iron-on coverings satis factory prefer traditional methods suggest fabric wings either ironed-on Coverite doped-on silk Silron doped-on Silkspan over bare wood parts Silkspan easily applied 75% thinner-25% dope mixture brushed through paper after preparing wood application two coats clear dope 84 Model Aviation 4 NE3Y KITS OF WORLD CLASSIC AIRCRAFT FROM ~LYLINE utlsi,tOnp,hO upRa,au,nAiid 2345RPRAdRI , EXiRla i,,,5 Run n2X p.$1295 XuXflb. PXR, Sig StO IXAL XiApe9 flIZhi XR5A P,r,XX Send 254 catalog See dealer oIl FLYLINEa cloaaic kita NOW FLYLINE MODELS INC 031 5734335 HEINKEL 1000 ninsata RAXR * flX3 RfRXR, XAA, PAR Rlii33XSIXOiPRX2X P32 Flu, PAhiin 12