Busy Bee

U Design Bill Booth Jr Text/Pics John Oldenkamp FREE FLIGHT IS ALIVE well may need little sprucing up nothing aeromodeling can match thrill witnessing latest project wheel i1g overhead whether light lift genuine monster thermal Watching model speck out solid max flight amply justifies frenzied hours de signing building testing Todays smaller flying sites have spawned several new events among very successful P-30 Rubber class Walt \ ree 1iS Mooneys West Coast Bostonian 14-gram models number Scale semiscale events promoted Fly ing Aces Club newcomers Free Flight community have entered through classes category Pee Wee-30 can now added list new events thats getting ahead story Like good things aeromodeling Pee Wee30 its beginnings during late-night hangar flying session 1984 Nats Reno several San Diego Orbiteers got together motel relax enjoy blessedly cool evening temporarily saturated flyNovember 1987 79 Above Designer Bill Booth Jr has try launching authors Pee Wee-30 model Right completed model done black yellow Orbiteers spacious flying field ing playing casinos out ideas bounced around night caine new proposal Charlie Yost longtime Free Flight proponent McDonnell-Douglas aero engineer suggested develop low-key Gas event using popular Cox Pee Wee 020 engine goals something fun simple build rela tively inexpensive yet exciting fly competition Charlie threw last re quirement have wheels spot christened Pee Wee-30and fun began Within month six little beasts being flown informally local contests Preliminary rules drawn up data taken engine per formance flight envelope de veloped What emerged entry-level Gas class nearly everyone enjoyed building seemed worth pursuing beyond club level no time national modeling press picked up idea giving additional boost Very quickly realized winner making surprise appeal attracting both experienced novice fliers few new con testants RCers After two years testing tweaking refining rulesand help friends national columnists Ed Whitten Dave Linstrum Bob Stalick et althe biteers chose 1987 year introduce Pee Wee-30 world included 80 Model Aviation Fully kitted ready assembly its easy see relative positions parts finished model Note guidelInes drawn wing stabilizer rib placement ADove rib asssmblies tor polyhe dral joints simplify ensure proper panel angles later during wings construction wing camber established air using gentle finger pressure proper align ment very small amounts CyA glue First install leading edge double-glue rib tip leading edge joints avoid warping giue sheeting onto other rib go back glue remaining ribs Things note business end Pee Wee-30 Engine mounting screws should ex tend through firewall drop CyA will lock place fuel reservoir mounted firewall brace wheels held piece aluminum tube Also note dethermalizer fuse related hardware simple pylon landing gear Full-Size Plans Available . See Page 186 STAB SECTION MODEL SECTION B - DIHEDRAl WING RIBS MODEL SECTION TOP VIEW~a NG RIBS MODEL B STAB RIBS MODEL B category club schedule special event ponied up $100 years Pee Wee-30 club champion process formalizing rules grew out shared experience event trust re flects its true spirit brief summary ver sion rules although actual language little tedious can found end article probably thousand model de signs could adapted Pee Wee30 formula Among OldTimers Nostalgia subjects mod em designs addition wheels Complicated curves fuselages can sim ply executed all-sheet construction al though built-up stick-and-tissue wing will yield better glide want roll own try keep things simple straight forward will rewarded ex tremely durable fun-to-fly ship wont cost bundle produce Busy Bee knock off Bill Booths very successful Malibu model plans show two versions con struction Depending time schedule skill level can build either allsheet stick-and-tissue version pro totype all-sheet took about 10 hours finish Despite being heavily painted weighed 102 grams flew very well during initial tests slightly tail-heavy Substituting stabilizer made lighter wood brought center gravity CG proper locationand now goes like others weve built mild right climb fast hang ing glide Flight times around minute dead air well over two minutes buoy ant air Rise-off-ground ROG takeoffs brisk safe tough little airplane test flight model inadvertently sent off about three sec onds engine run time remaining result ing violent stall resounding smack truck larger faster ship would have smashed pieces Busy Bee damage small nick wing leading edgeand smidgen em barrassment part Building following construction guide lines all-sheet Busy Bee shown plans first second model might useful enlist someone experience help smooth things out bit particularly use instant Cyanoacrylate CyA glues remarkably easy fast use require little caution practice basic supplies needed construc November 1987 81 Use plenty DT angle stab assure safe return good-flying model Monofil ament fishing line holds stab down place until fuse burns through rubberband tion sheet balsa additional bits wire plywood dowel etc Three sheets 3 x 36-in balsa either 3A2-in 2mm thick will make parts except fuse lage made rock-hard deadstraight 36 x /16 x 1-in balsa common yardstick will also work well fuse lage Lightweight quarter-grain speckled looking wood best Pete Vacco fine folks Hobby Woods PO Box 48 Linden CA 95236 can supply some super 2mm wood 6- 8-lb range ideal all-sheet projects Only simplest tools needed sharp single-edge razor blades 100- 320-grit sandpaper sanding block pliers ruler straightedge small drill bits round files keeping spirit category nothing complicated called lot fun pre-cut kit all-sheet models before beginning sembly process Once pieces cut size laid out finished product will take shape very rapidly timeconsuming parts first Begin butt-joining two 3 x 36-in sheets together using instant CyA glue As soon glue sets place three sheets together blocksand uniform thickness Patterns various shapes can traced mea sured cut plans Using method choose mark outlines rib brace locations cut everything out cleanly possible Gus sets smaller bits wing leading edge cut remaining scrap wish ribs can cut center rib pattern shortened match plan taper go along fuselage stick requires two cutslength taper after made sand lightly set aside wing hold-down firewall braces wing center fillets come fuselage re mains Now good time make up wing stabilizer platforms Lay out parts proper position go along avoid losing track which firewall sandwich 46-in ply wood glued up layers sanded true four edges Mark engine mounting holes drill out punch halfway through small brad guide screws later assembly Make landing gear A6-in music wire beginning small top bends Bend spread next finally bends axles File axles off smooth wish remaining hooks dethermalizer DT tubes guides etc can made up point Paper clips will work just fine hooks aluminum tubes easily cut razor blade rol ling tubing back forth cutting surface Now bits hand take few minutes figure out everything fits before beginning glue together suggest completing smaller assemblies such fin sub-fin stabilizer pylon wing mount before tackling wing fuselage Fuselage Glue firewall squarely place thick CyA glue Alignment very important crooked pull joint apart quickly start over Round edges fin sub-fin align carefully tack-glue position thin CyA same stabilizer platform spot-glue pylon assembly belongs Add glue fillets sparingly major joints allow set Sand entire fuselage assembly round ing edges slightly 320-grit sandpa per go along Glue landing gear flush fuselage pylon front let set finish adding firewall bra ces Check photos details Fi nally add thick CyA glue fillets over last joints set fuselage aside Wing sheet wing built in-the air quite easy accomplish Start attaching leading edge wing sheeting making sure flat true ribs make up polyhedral breaks prepared shown photo graph lightly tack-gluing wedge %2 scrap top create offsets shown pretty much automati cally establishes correct polyhedral joint angles ahead time Next spot-glue nose rib place sheeting/leading edge juncture Double-glue thicker CyA side well Once joints thoroughly set begin forming wing camber CyA ing other rib place working out center tips ribs must pulled set place accurately along position-locating lines warps will result careful patient really 82 Model Aviation wing surfaces gently rounded using #360-grit sandpaper Always aware power booming thermals place ID somewhere model author did alternative wing shown plans should built up straight lightweight balsa Models using wing tend glide longer building may too much beginner easy transition flat sheet nice looking curved surface worry Trim rib ends sand entire assem bly smooth round edges particu larly leading edge Add triangular pieces side center ribs Care fully mark square-cut wing three polyhedral joints flexible straight edge great help Again work slowly force things Several light cuts work better ripping cruncher install proper polyhedral first block-sand joint end straight true positioning over workbench edge off end glass sanding surface such do-it-yourself shelf units paint stores have sale Test-fit joints re-sand necessary satisfied work pin down main panels leading edge leading edge add tips proper alignment propped up 2 above board Check measurements spotglue tips main panels Set thick CyA reglue top bottom Re peat center joint blocking side up hunk standard 1 x 2-in lumber correct angles finish off new wing dress down rib bottoms sanding block 320 paper eliminate fuss Preassemble model make sure everything looks right correct misalignments Drill hog-out holes DT hardware hold-down hooks fuel tank etc Test-fit engine four #2 wood screws Once properly fit remove engine set aside Finishing remains painting trimming fuel-proofing new model quickest easiest way Sig Spray clear butyrate color important Pactra Aero Gloss spray butyrate dope Alternatives tissue color trim K&B Superpoxy Hobby Poxy Black Baron Spray Epoxy etc Whichever choose dont overdo Keeping weight down important finishing adds weight hurry Also best paint outside decent dry day materials quite toxic despite what labels might say complete assembly remount en gine CyA fuel reservoir/tank eye dropper large glue tip place add remaining hardware including DT line shown plans Install wheels axles use Perfect 1AA re tainers hold place Finally strap together rubberbands Pee Wee-30 model complete Flight trininiing begins good hangar inspection Check balance point CG rearward point indicated plans add clay lead nose area con versely balances forward point plans add weight tall area bad warps steam out Make sure DT works installing piece test fuse letting burn through ascertain stab pops up anything else looks weird correct now before hit turf first-flight nerves ablaze Pick sunny calm day maiden flight preferably early morning field covered tall grass would bestif can found few handlaunched test glides shoulder height good idea before turn power no bad dorks occur move running couple tanks fuel through system near-peak rpm Tweak trailing edge third rib bay right main wing panel down about 6 washin adding teeny bit rudder Test glide once Rerun engine watch fuel level until find point runs out about four five seconds remember mark Restart engine wait fuel drop mark launch level smooth model should make smooth power climb right make very slight dip cutoff transition smooth descent wide left glide things didnt proceed exactly planned trim out time model made slight loop can cured adding downthrusta washer two under two top engine-mounting screws Severe looping may require shim under trailing edge wing hard right turn under power can corrected add ing left thrust engine using two washers turn missing glide shim up stabilizer left side model stalls end power climb first recheck balance point try adding little nose weight until con dition disappears model spirals dur ing glide check balance point incidence angles increase incidence raise front wing back stab needed beautiful aspects allsheet Pee Wee-30 models adjust ments can bent cut Repairs quite easy dab CyA damage event crash usually pretty minor Newcomers well-advised take friend along first episodes should also observe safety practices start Stay awaywell awayfrom cars times keep eye specta tors dont stupid things jest otherwise Busy Bee performing satisfaction try couple rise-offground flights pointed dead-straight ever slightly left prevailing breeze point fun quotient somewhere above horizon Have fun cheers John Oldenkamp 3331 Adams Ave San Diego CA 92116 Condensed Orbiteers Pee Wee-30 Rules Power Cox Pee Wee 20 reed valve engine 30-in maximum airframe dimensions length wingspan Minimum weight 100 grams 252 oz No gadgets allowed Two-wheel main gear 1-in minimum di ameter Engine run controlled metered device eyedropper etc No mechanical timers engine run DT timers OK Any type construction Official flights 40 sec miaimum Six tempts make three official flights must ROG Engine run 0-15 sec ec Over 15 sec counted next highest whole second Flight time fractions rounded previous whole second Scoring Flight time 120 sec max divided engine run 15 sec mm times 100 equals flight score Flyoff flights Max increased 30 sec per flight necessary flyoffs must ROG Safety/Preston Continued page 22 wind have wind pressure tail help ing swing plane over Some may questioning Im men tioning effect wind performance aerobatics Well believe lack under standing what wind will will model has direct bearing ability fly safe manner agree above statement concern ing Stall Turn crosswind get re sponses Ill discuss future column Meanwhile fly safely watch out other guy John Preston 2812 Northampton St N W Washington DC 20015 Electrostreak/Stryker Continued page 32 steps forward tossing forward level attitude first test flight try few clicks up-elevator trim ensure will dive immediately after launch Allow few seconds level flight build up speed before beginning climb Electrostreak first flown Leisure 05 competition-wind motor Cox gray 6-4 prop GE six-cell 1200 mAb battery Straight-and-level flight quite fast least appeared way its sleek lines Rate climb however little low basic maneuvers such rolls inside outside loops hammer head turns snap rolls spins could performed simply needed few seconds straight-and-level flight between maneuver gain speed good com bination budget-minded flier still offers good performance Later Leisure motor removed Astro Cobalt 05 installed its place easily accomplished modification needed being wrap masking tape around rear smaller Astro Cobalts case would fit snugly through hole F2 two mounting holes Fl aligned perfectly six-cell battery replaced seven-cell Sanyo 1200 mAh pack Performance with the Astro Cobalt noContinued page 139 November 1987 83

U Design Bill Booth Jr Text/Pics John Oldenkamp FREE FLIGHT IS ALIVE well may need little sprucing up nothing aeromodeling can match thrill witnessing latest project wheel i1g overhead whether light lift genuine monster thermal Watching model speck out solid max flight amply justifies frenzied hours de signing building testing Todays smaller flying sites have spawned several new events among very successful P-30 Rubber class Walt \ ree 1iS Mooneys West Coast Bostonian 14-gram models number Scale semiscale events promoted Fly ing Aces Club newcomers Free Flight community have entered through classes category Pee Wee-30 can now added list new events thats getting ahead story Like good things aeromodeling Pee Wee30 its beginnings during late-night hangar flying session 1984 Nats Reno several San Diego Orbiteers got together motel relax enjoy blessedly cool evening temporarily saturated flyNovember 1987 79 Above Designer Bill Booth Jr has try launching authors Pee Wee-30 model Right completed model done black yellow Orbiteers spacious flying field ing playing casinos out ideas bounced around night caine new proposal Charlie Yost longtime Free Flight proponent McDonnell-Douglas aero engineer suggested develop low-key Gas event using popular Cox Pee Wee 020 engine goals something fun simple build rela tively inexpensive yet exciting fly competition Charlie threw last re quirement have wheels spot christened Pee Wee-30and fun began Within month six little beasts being flown informally local contests Preliminary rules drawn up data taken engine per formance flight envelope de veloped What emerged entry-level Gas class nearly everyone enjoyed building seemed worth pursuing beyond club level no time national modeling press picked up idea giving additional boost Very quickly realized winner making surprise appeal attracting both experienced novice fliers few new con testants RCers After two years testing tweaking refining rulesand help friends national columnists Ed Whitten Dave Linstrum Bob Stalick et althe biteers chose 1987 year introduce Pee Wee-30 world included 80 Model Aviation Fully kitted ready assembly its easy see relative positions parts finished model Note guidelInes drawn wing stabilizer rib placement ADove rib asssmblies tor polyhe dral joints simplify ensure proper panel angles later during wings construction wing camber established air using gentle finger pressure proper align ment very small amounts CyA glue First install leading edge double-glue rib tip leading edge joints avoid warping giue sheeting onto other rib go back glue remaining ribs Things note business end Pee Wee-30 Engine mounting screws should ex tend through firewall drop CyA will lock place fuel reservoir mounted firewall brace wheels held piece aluminum tube Also note dethermalizer fuse related hardware simple pylon landing gear Full-Size Plans Available . See Page 186 STAB SECTION MODEL SECTION B - DIHEDRAl WING RIBS MODEL SECTION TOP VIEW~a NG RIBS MODEL B STAB RIBS MODEL B category club schedule special event ponied up $100 years Pee Wee-30 club champion process formalizing rules grew out shared experience event trust re flects its true spirit brief summary ver sion rules although actual language little tedious can found end article probably thousand model de signs could adapted Pee Wee30 formula Among OldTimers Nostalgia subjects mod em designs addition wheels Complicated curves fuselages can sim ply executed all-sheet construction al though built-up stick-and-tissue wing will yield better glide want roll own try keep things simple straight forward will rewarded ex tremely durable fun-to-fly ship wont cost bundle produce Busy Bee knock off Bill Booths very successful Malibu model plans show two versions con struction Depending time schedule skill level can build either allsheet stick-and-tissue version pro totype all-sheet took about 10 hours finish Despite being heavily painted weighed 102 grams flew very well during initial tests slightly tail-heavy Substituting stabilizer made lighter wood brought center gravity CG proper locationand now goes like others weve built mild right climb fast hang ing glide Flight times around minute dead air well over two minutes buoy ant air Rise-off-ground ROG takeoffs brisk safe tough little airplane test flight model inadvertently sent off about three sec onds engine run time remaining result ing violent stall resounding smack truck larger faster ship would have smashed pieces Busy Bee damage small nick wing leading edgeand smidgen em barrassment part Building following construction guide lines all-sheet Busy Bee shown plans first second model might useful enlist someone experience help smooth things out bit particularly use instant Cyanoacrylate CyA glues remarkably easy fast use require little caution practice basic supplies needed construc November 1987 81 Use plenty DT angle stab assure safe return good-flying model Monofil ament fishing line holds stab down place until fuse burns through rubberband tion sheet balsa additional bits wire plywood dowel etc Three sheets 3 x 36-in balsa either 3A2-in 2mm thick will make parts except fuse lage made rock-hard deadstraight 36 x /16 x 1-in balsa common yardstick will also work well fuse lage Lightweight quarter-grain speckled looking wood best Pete Vacco fine folks Hobby Woods PO Box 48 Linden CA 95236 can supply some super 2mm wood 6- 8-lb range ideal all-sheet projects Only simplest tools needed sharp single-edge razor blades 100- 320-grit sandpaper sanding block pliers ruler straightedge small drill bits round files keeping spirit category nothing complicated called lot fun pre-cut kit all-sheet models before beginning sembly process Once pieces cut size laid out finished product will take shape very rapidly timeconsuming parts first Begin butt-joining two 3 x 36-in sheets together using instant CyA glue As soon glue sets place three sheets together blocksand uniform thickness Patterns various shapes can traced mea sured cut plans Using method choose mark outlines rib brace locations cut everything out cleanly possible Gus sets smaller bits wing leading edge cut remaining scrap wish ribs can cut center rib pattern shortened match plan taper go along fuselage stick requires two cutslength taper after made sand lightly set aside wing hold-down firewall braces wing center fillets come fuselage re mains Now good time make up wing stabilizer platforms Lay out parts proper position go along avoid losing track which firewall sandwich 46-in ply wood glued up layers sanded true four edges Mark engine mounting holes drill out punch halfway through small brad guide screws later assembly Make landing gear A6-in music wire beginning small top bends Bend spread next finally bends axles File axles off smooth wish remaining hooks dethermalizer DT tubes guides etc can made up point Paper clips will work just fine hooks aluminum tubes easily cut razor blade rol ling tubing back forth cutting surface Now bits hand take few minutes figure out everything fits before beginning glue together suggest completing smaller assemblies such fin sub-fin stabilizer pylon wing mount before tackling wing fuselage Fuselage Glue firewall squarely place thick CyA glue Alignment very important crooked pull joint apart quickly start over Round edges fin sub-fin align carefully tack-glue position thin CyA same stabilizer platform spot-glue pylon assembly belongs Add glue fillets sparingly major joints allow set Sand entire fuselage assembly round ing edges slightly 320-grit sandpa per go along Glue landing gear flush fuselage pylon front let set finish adding firewall bra ces Check photos details Fi nally add thick CyA glue fillets over last joints set fuselage aside Wing sheet wing built in-the air quite easy accomplish Start attaching leading edge wing sheeting making sure flat true ribs make up polyhedral breaks prepared shown photo graph lightly tack-gluing wedge %2 scrap top create offsets shown pretty much automati cally establishes correct polyhedral joint angles ahead time Next spot-glue nose rib place sheeting/leading edge juncture Double-glue thicker CyA side well Once joints thoroughly set begin forming wing camber CyA ing other rib place working out center tips ribs must pulled set place accurately along position-locating lines warps will result careful patient really 82 Model Aviation wing surfaces gently rounded using #360-grit sandpaper Always aware power booming thermals place ID somewhere model author did alternative wing shown plans should built up straight lightweight balsa Models using wing tend glide longer building may too much beginner easy transition flat sheet nice looking curved surface worry Trim rib ends sand entire assem bly smooth round edges particu larly leading edge Add triangular pieces side center ribs Care fully mark square-cut wing three polyhedral joints flexible straight edge great help Again work slowly force things Several light cuts work better ripping cruncher install proper polyhedral first block-sand joint end straight true positioning over workbench edge off end glass sanding surface such do-it-yourself shelf units paint stores have sale Test-fit joints re-sand necessary satisfied work pin down main panels leading edge leading edge add tips proper alignment propped up 2 above board Check measurements spotglue tips main panels Set thick CyA reglue top bottom Re peat center joint blocking side up hunk standard 1 x 2-in lumber correct angles finish off new wing dress down rib bottoms sanding block 320 paper eliminate fuss Preassemble model make sure everything looks right correct misalignments Drill hog-out holes DT hardware hold-down hooks fuel tank etc Test-fit engine four #2 wood screws Once properly fit remove engine set aside Finishing remains painting trimming fuel-proofing new model quickest easiest way Sig Spray clear butyrate color important Pactra Aero Gloss spray butyrate dope Alternatives tissue color trim K&B Superpoxy Hobby Poxy Black Baron Spray Epoxy etc Whichever choose dont overdo Keeping weight down important finishing adds weight hurry Also best paint outside decent dry day materials quite toxic despite what labels might say complete assembly remount en gine CyA fuel reservoir/tank eye dropper large glue tip place add remaining hardware including DT line shown plans Install wheels axles use Perfect 1AA re tainers hold place Finally strap together rubberbands Pee Wee-30 model complete Flight trininiing begins good hangar inspection Check balance point CG rearward point indicated plans add clay lead nose area con versely balances forward point plans add weight tall area bad warps steam out Make sure DT works installing piece test fuse letting burn through ascertain stab pops up anything else looks weird correct now before hit turf first-flight nerves ablaze Pick sunny calm day maiden flight preferably early morning field covered tall grass would bestif can found few handlaunched test glides shoulder height good idea before turn power no bad dorks occur move running couple tanks fuel through system near-peak rpm Tweak trailing edge third rib bay right main wing panel down about 6 washin adding teeny bit rudder Test glide once Rerun engine watch fuel level until find point runs out about four five seconds remember mark Restart engine wait fuel drop mark launch level smooth model should make smooth power climb right make very slight dip cutoff transition smooth descent wide left glide things didnt proceed exactly planned trim out time model made slight loop can cured adding downthrusta washer two under two top engine-mounting screws Severe looping may require shim under trailing edge wing hard right turn under power can corrected add ing left thrust engine using two washers turn missing glide shim up stabilizer left side model stalls end power climb first recheck balance point try adding little nose weight until con dition disappears model spirals dur ing glide check balance point incidence angles increase incidence raise front wing back stab needed beautiful aspects allsheet Pee Wee-30 models adjust ments can bent cut Repairs quite easy dab CyA damage event crash usually pretty minor Newcomers well-advised take friend along first episodes should also observe safety practices start Stay awaywell awayfrom cars times keep eye specta tors dont stupid things jest otherwise Busy Bee performing satisfaction try couple rise-offground flights pointed dead-straight ever slightly left prevailing breeze point fun quotient somewhere above horizon Have fun cheers John Oldenkamp 3331 Adams Ave San Diego CA 92116 Condensed Orbiteers Pee Wee-30 Rules Power Cox Pee Wee 20 reed valve engine 30-in maximum airframe dimensions length wingspan Minimum weight 100 grams 252 oz No gadgets allowed Two-wheel main gear 1-in minimum di ameter Engine run controlled metered device eyedropper etc No mechanical timers engine run DT timers OK Any type construction Official flights 40 sec miaimum Six tempts make three official flights must ROG Engine run 0-15 sec ec Over 15 sec counted next highest whole second Flight time fractions rounded previous whole second Scoring Flight time 120 sec max divided engine run 15 sec mm times 100 equals flight score Flyoff flights Max increased 30 sec per flight necessary flyoffs must ROG Safety/Preston Continued page 22 wind have wind pressure tail help ing swing plane over Some may questioning Im men tioning effect wind performance aerobatics Well believe lack under standing what wind will will model has direct bearing ability fly safe manner agree above statement concern ing Stall Turn crosswind get re sponses Ill discuss future column Meanwhile fly safely watch out other guy John Preston 2812 Northampton St N W Washington DC 20015 Electrostreak/Stryker Continued page 32 steps forward tossing forward level attitude first test flight try few clicks up-elevator trim ensure will dive immediately after launch Allow few seconds level flight build up speed before beginning climb Electrostreak first flown Leisure 05 competition-wind motor Cox gray 6-4 prop GE six-cell 1200 mAb battery Straight-and-level flight quite fast least appeared way its sleek lines Rate climb however little low basic maneuvers such rolls inside outside loops hammer head turns snap rolls spins could performed simply needed few seconds straight-and-level flight between maneuver gain speed good com bination budget-minded flier still offers good performance Later Leisure motor removed Astro Cobalt 05 installed its place easily accomplished modification needed being wrap masking tape around rear smaller Astro Cobalts case would fit snugly through hole F2 two mounting holes Fl aligned perfectly six-cell battery replaced seven-cell Sanyo 1200 mAh pack Performance with the Astro Cobalt noContinued page 139 November 1987 83