Potato Man

NO OCR TEXT NO OCR TEXT little longer wing actually built same way did stabonly four rectangles build instead suggest same procedure cut parts rectangle line up pin glue together proceed next panel until have four rectangles Potato Man uses wing spar help form rudimentary airfoil add strength structure Cut four spar pieces length glue top rectangle indicated position Allow structure dry thoroughly before proceeding Now its time join panels requires beveling joints panels mate easiest way to make joint 900 bevel other panel proper angle Youll need sanding blocka T-bar sander excellent glue some mediumgrit sandpaper hardwood blockand hard surface straight edge can sand against losing shape edge Tip dihedral added first Sand main-panel end rib tip will attach 900 angle bench block up tip required angle making sure edge tip rib flush edge sanding surface Pin hold tip place sand tip rib until block bottoms out against sanding surface Repeat process other tip main panel Pin main panel bench glue tip Pin place allow dry thoroughly Repeat other tip main panel fact workbench big enough its easiest pin main panels parallel other both joints same time can sure panels have equal dihedral way block shim can used both tips tip joints have dried main panels joined similar fashion Its advisable add braces outside jointsthey really come under stress awkward landings Braces made tracing joint outline onto Y32 plywood trimming fit braces need cover inch past joint direction About airfoil chose round off taper leading trailing edges way hold models performance down bit wanted performance Grasshopper much dethermalizer DT would required Eyedropper held place rubber band looped around fuselage Landing gear long springy Flying weight 12 ounces Construction Built-up June1996 35 Dihedral joints made propping up appropriate panel sanding bevel dihedral ribsee text MRL Mylar covering top spar form rudimentary airfoil simple means enhance performance stabilizer held place single #64 rubber band hooked around retaining dowels sturdy fuselage Type FE Sport Wingspan 36 inches Engine Reed-valve 049 Coveringlfinish MRL Mylar/Nybco spray epoxy Messing around adjusting lighting DT fuses lot ask beginner theres risk losing model dont want lose Potato Manwe want out flying Fuselage Its big sturdy boxdesigned tough light pieces fit together such way trap pylon rudder will automatically alignment less thing contend proceed construction fuselage built right side up Pin right side plan add bottom top end pieces Use scrap balsa pylon slot hold pieces apart proper distance rudder can built pylon left out can slid back forth determine proper center gravity [CC] position As B-70 Potato Mans landing gear trapped between firewall engine Its much easier mount gear way its easily removed straighten out gear when/if gets bent gear intentionally thin springy maximum cushioning effect will probably get bend now lack experience bending music wire try practicing old coat hanger first wire much softer will give idea what Start wheel axle work way around care patience its too hard Covering/Finish The prototypes wing stab covered Model Research Labs iron-on clear Mylar same used Grasshopperavailable rolls MRL 25108 Marguerite #160 Mission Viejo CA 92692 Its lighter iron-on coverings easier handle fact its clear gives unlimited color choices Start staba small flat surface thats easy work Cut piece material thats about inch larger perimeter stab fire up iron medium-heat setting Some experimentation required hereyou want sure material will attach itself structure cant melt film An advantage MRL film frosty appearance lets see adhesive has activated Use tip iron tack film down top frameworkfirst corners center progressively smaller areas Stay wooddo attempt shrink open part covering yet Iron film down around front edges stab trim excess film away Now its time add color local department store has kinds spray enamelseven $ 1/can stuff will work fine Turn stab over spray color bottom stab inside area just covered Allow dry several hours before adding bottom covering Now bottom stab can covered piece clear Mylar just did topexcept will no painting Thus paint trapped inside protected fuel Thats cheap paint will work After both surfaces have covered open areas can shrunk down smooth Poke couple pinholes panels covering allow bit ventilation hot air can escape inside shrink covering wing covered same mannerthere simply pieces work didnt want complicate building process adding fill-in pieces dihedral tip ribs just sake smooth covering job covering simply wrapped around ends tips overlapped against itself dihedral joints Looks ugly flies fine As B-70 models fuselage has Nybco brand spray epoxy its finish Its great stuffgood color fuelproof up 25% nitro fuel have used Its also inexpensive about $250 can readily available stocked Wal Mart stores area Coverage good recoating possible after few hours used black its coverage capability models have black fuselages anyway wing should keyed maintain alignment over series flights 1/16 x 1/i keys keep wing straight small enough allow some give cartwheel-type landing will either slide over wing mount simply shear off easily replaced Place handy drafting triangle against side pylon shift wing until leading edge edge triangle sight along mark points wing leading trailing edge contact wing platform scrape covering away points glue keys place Flying Begin classic hand-gliding session calm day evening wont learn anything trying hand-glide breeze patient enough wait good weather windy days theres often calm period just before sundown Grasp fuselage just behind CG hold model level take fast walk forward gently push model straight ahead What want see model slowly settling ground perhaps 20 feet front doesnt test-glide again sure errant toss didnt affect outcome results consistent model stalls pitches nose up dives consistently adjustments order glide too steep dive can corrected adding small shim A2 thick between fuselage trailing edge stab Cut shim match width fuselage perhaps 1/2 inch wide Hand glide least twice consistencys sake see another shim necessary Repeat until get glide described above model stalls reverse shimming procedure adding shims time between leading edge stab fuselage Again test-glide multiple times sure launch affecting result Once glide reasonably close described above take deep breath prepare powered flight Note Its far better have model little mushy glide have glide thats too steep model glides steeply will likely dive under power glide mushy model may have too much right-turn tendency much 36 Model Aviation ne will run 30 seconds full eyedropper tank Climb pattern gentle nose-up right-hand spiral Keep nose up wings level launch slightly right wind No mashed Potatoes please 3B SQ BALSA LEADING EDGEIZDD PLY DIHEDRAL BRACES SZB BALSA GUSSETSjr fjII I ICOVER WING WITH MIL I2I2MRL MYLAR FORMS AIRYGIL 3ZB 5G BALSA7 K IDIHEDRAL DETAIL WING CROSS SECTION 3ZBSG 3/B 55 BALSA7 3/8 BALSA 3GB SETS STABILIZER PLAN I/DO PLYGDIHEDRAL DHEORAL3/B SO BALSABREWE3/HSO BALSA BREAKWINGTRAILING EDGE 3/K SO BALSA RUNNERS I/5 US BALSA SGPPORTS-~----L4 BALSA PLATFURM CGG 'KILLER BEEGASIII11IIliI ENGINE OR RT F 1/ZA NGINESEE TEG TN PYLON PROYGS OF EYE DROPPER ______ FUEL TANKi\IIIIIIIIll/Il 7C T7 BALSA SHEET PYLON LSGEIS3/3DBALGA SHEET SIDE TOP BOTTOM II 1/32 PLY DIHEDRAL BRACE 3/B BALSA GOGGETS TWO 3/SOT 5/IN BRACES TO HOLD NODDER INTO FOG ELAGE 3/HSO BALSA STABILIZER LI-:--- - R 55 BALSA 3ZH BALSA GADGETS 3/B 55 BALSA LEADING EDGE COVER WITH MIL H B L MYIAR / CREATE DOWN THRAST RY PIVOTING FIREWALL I/B REARWARD AT BGTTTRAP LU BETWEEN ENGINE N FIREWALL I/IA DIA I-I/A DIAMGSIC WIRE WHEELS 3/B SO BALSA TRAILING EDGE COG 049 ENGINE ISEE ABOVE RUN WITH B-3 NYLON PROP I/B PLY FIREWALL S IS TRAPPED BETWEEN FIREWALL AND ENGINE BACKPLATE FUSELAGE SIDE VIEW 3/B SO BALSA RUNSEUS 4 PLACES -TO HOLD POLON INTO FUSELAGE 4 BALSA GYEET PLATFORM 3/TB GO BALSA RUNNERS 1/4 SQ BALSA SUPPORTS FUSELAGE TOP VIEW VIUDIA MUSIC WIRE WILLIAMS BROS JjIPATTERNr Il/H WHEELS LIGHTI 5/32 BALSA SHEET FUSELAGEI\ BOX-GIDES TOP BOTTOM I03H5K COMPUTERIZES 3/K/GA ND FRIESTAD LBDOWELI STAB HOLD DOWNrI 3D2 BALSARUDDER SHEET RGDDEH 1/ROOWELS FSA STABILIZER ATTACH Il D/3ZT 5/PB BALSA RUDDER BRACES MODEL AVIATION POTATO MAN DESIGNED BY JIM HAGOBY INKED PLAN 80 JOE DENKRRCO ALL RIGUTSSUEET1 RESEMOTOI OF ILA N -4 U likely survive power testing may break prop two major damage far less likely Test-mn engine sure have good needle-valve setting will run out full eyedropper engine will run about 30 seconds full eyedropper tankand thats plenty model have starting problems simply refill tank before crank up engine again use syringe fill tank can refill eyedropper engine running little practice first powered flights should launched slighfly right wind short engine runsonly few seconds judged model launching fuel just left eyedropper fuel left line good few seconds power thats enough let model get high enough see what its doing Thrust adjustments powered FF models effective low speedsthe early part powered flight As model picks up speed flying surfaces have effect used adjust part climb What want gentle right-hand turn under power nose up model wants go immediately left no warps misaligned parts A2 shim right thrust needed Glue strip A2 plywood perhaps 1/g wide left side firewall engine points right viewed rear model imaginary cockpit Reverse above adjustment model immediately heads too much right after launch Potato Mans natural arrangement forces downthrust underslung rudder neutral thrustline give right-turn tendency anyway adjustment should relatively simple patient mnke small adjustment time increase engine run length until satisfied model climbing safe right-hand turn Likewise dont concern yourself transition power glide point glide itself long its relatively safe model isnt really high enough yet normal flight wont get proper reaction until can give longer engine run satisfied short engine runs gradually increase length engine run maybe three four seconds time observe model Now thrust adjustments less effective tendency turn too much way another controlled rudder Sand carve some A6 x a triangular shape like piece trailingedge stock Cut /2-inch lengths glue appropriate side rudder power turn blunt fat edge toward rearsee rudder offset used XB-70 Start bottom rudder use piece time Example Model turns too tightly right extended engine run after initial climb OK solution give left rudder gluing strip rudder-trim material bottom left side rudder again viewed rear Repeat necessary add longer shorter strips until model continues climb safely As thrust adjustments reverse above instructions climb too tight right Above patient power trimming Take extra flight two necessary get good look what model doing Haste really does make waste As long power pattern safe engine run can continue increased suit taste limitations flying field size eyedropper point normal powered free flight model trim would concentrate finetuning glide tilting stab nice smooth circle chose model like blunt airfoil wanted hold performance back bit lessen risk losing model models will have some sort natural turn anyway Now can fill tank much dare really have some fun spuds odel Aviation

NO OCR TEXT NO OCR TEXT little longer wing actually built same way did stabonly four rectangles build instead suggest same procedure cut parts rectangle line up pin glue together proceed next panel until have four rectangles Potato Man uses wing spar help form rudimentary airfoil add strength structure Cut four spar pieces length glue top rectangle indicated position Allow structure dry thoroughly before proceeding Now its time join panels requires beveling joints panels mate easiest way to make joint 900 bevel other panel proper angle Youll need sanding blocka T-bar sander excellent glue some mediumgrit sandpaper hardwood blockand hard surface straight edge can sand against losing shape edge Tip dihedral added first Sand main-panel end rib tip will attach 900 angle bench block up tip required angle making sure edge tip rib flush edge sanding surface Pin hold tip place sand tip rib until block bottoms out against sanding surface Repeat process other tip main panel Pin main panel bench glue tip Pin place allow dry thoroughly Repeat other tip main panel fact workbench big enough its easiest pin main panels parallel other both joints same time can sure panels have equal dihedral way block shim can used both tips tip joints have dried main panels joined similar fashion Its advisable add braces outside jointsthey really come under stress awkward landings Braces made tracing joint outline onto Y32 plywood trimming fit braces need cover inch past joint direction About airfoil chose round off taper leading trailing edges way hold models performance down bit wanted performance Grasshopper much dethermalizer DT would required Eyedropper held place rubber band looped around fuselage Landing gear long springy Flying weight 12 ounces Construction Built-up June1996 35 Dihedral joints made propping up appropriate panel sanding bevel dihedral ribsee text MRL Mylar covering top spar form rudimentary airfoil simple means enhance performance stabilizer held place single #64 rubber band hooked around retaining dowels sturdy fuselage Type FE Sport Wingspan 36 inches Engine Reed-valve 049 Coveringlfinish MRL Mylar/Nybco spray epoxy Messing around adjusting lighting DT fuses lot ask beginner theres risk losing model dont want lose Potato Manwe want out flying Fuselage Its big sturdy boxdesigned tough light pieces fit together such way trap pylon rudder will automatically alignment less thing contend proceed construction fuselage built right side up Pin right side plan add bottom top end pieces Use scrap balsa pylon slot hold pieces apart proper distance rudder can built pylon left out can slid back forth determine proper center gravity [CC] position As B-70 Potato Mans landing gear trapped between firewall engine Its much easier mount gear way its easily removed straighten out gear when/if gets bent gear intentionally thin springy maximum cushioning effect will probably get bend now lack experience bending music wire try practicing old coat hanger first wire much softer will give idea what Start wheel axle work way around care patience its too hard Covering/Finish The prototypes wing stab covered Model Research Labs iron-on clear Mylar same used Grasshopperavailable rolls MRL 25108 Marguerite #160 Mission Viejo CA 92692 Its lighter iron-on coverings easier handle fact its clear gives unlimited color choices Start staba small flat surface thats easy work Cut piece material thats about inch larger perimeter stab fire up iron medium-heat setting Some experimentation required hereyou want sure material will attach itself structure cant melt film An advantage MRL film frosty appearance lets see adhesive has activated Use tip iron tack film down top frameworkfirst corners center progressively smaller areas Stay wooddo attempt shrink open part covering yet Iron film down around front edges stab trim excess film away Now its time add color local department store has kinds spray enamelseven $ 1/can stuff will work fine Turn stab over spray color bottom stab inside area just covered Allow dry several hours before adding bottom covering Now bottom stab can covered piece clear Mylar just did topexcept will no painting Thus paint trapped inside protected fuel Thats cheap paint will work After both surfaces have covered open areas can shrunk down smooth Poke couple pinholes panels covering allow bit ventilation hot air can escape inside shrink covering wing covered same mannerthere simply pieces work didnt want complicate building process adding fill-in pieces dihedral tip ribs just sake smooth covering job covering simply wrapped around ends tips overlapped against itself dihedral joints Looks ugly flies fine As B-70 models fuselage has Nybco brand spray epoxy its finish Its great stuffgood color fuelproof up 25% nitro fuel have used Its also inexpensive about $250 can readily available stocked Wal Mart stores area Coverage good recoating possible after few hours used black its coverage capability models have black fuselages anyway wing should keyed maintain alignment over series flights 1/16 x 1/i keys keep wing straight small enough allow some give cartwheel-type landing will either slide over wing mount simply shear off easily replaced Place handy drafting triangle against side pylon shift wing until leading edge edge triangle sight along mark points wing leading trailing edge contact wing platform scrape covering away points glue keys place Flying Begin classic hand-gliding session calm day evening wont learn anything trying hand-glide breeze patient enough wait good weather windy days theres often calm period just before sundown Grasp fuselage just behind CG hold model level take fast walk forward gently push model straight ahead What want see model slowly settling ground perhaps 20 feet front doesnt test-glide again sure errant toss didnt affect outcome results consistent model stalls pitches nose up dives consistently adjustments order glide too steep dive can corrected adding small shim A2 thick between fuselage trailing edge stab Cut shim match width fuselage perhaps 1/2 inch wide Hand glide least twice consistencys sake see another shim necessary Repeat until get glide described above model stalls reverse shimming procedure adding shims time between leading edge stab fuselage Again test-glide multiple times sure launch affecting result Once glide reasonably close described above take deep breath prepare powered flight Note Its far better have model little mushy glide have glide thats too steep model glides steeply will likely dive under power glide mushy model may have too much right-turn tendency much 36 Model Aviation ne will run 30 seconds full eyedropper tank Climb pattern gentle nose-up right-hand spiral Keep nose up wings level launch slightly right wind No mashed Potatoes please 3B SQ BALSA LEADING EDGEIZDD PLY DIHEDRAL BRACES SZB BALSA GUSSETSjr fjII I ICOVER WING WITH MIL I2I2MRL MYLAR FORMS AIRYGIL 3ZB 5G BALSA7 K IDIHEDRAL DETAIL WING CROSS SECTION 3ZBSG 3/B 55 BALSA7 3/8 BALSA 3GB SETS STABILIZER PLAN I/DO PLYGDIHEDRAL DHEORAL3/B SO BALSABREWE3/HSO BALSA BREAKWINGTRAILING EDGE 3/K SO BALSA RUNNERS I/5 US BALSA SGPPORTS-~----L4 BALSA PLATFURM CGG 'KILLER BEEGASIII11IIliI ENGINE OR RT F 1/ZA NGINESEE TEG TN PYLON PROYGS OF EYE DROPPER ______ FUEL TANKi\IIIIIIIIll/Il 7C T7 BALSA SHEET PYLON LSGEIS3/3DBALGA SHEET SIDE TOP BOTTOM II 1/32 PLY DIHEDRAL BRACE 3/B BALSA GOGGETS TWO 3/SOT 5/IN BRACES TO HOLD NODDER INTO FOG ELAGE 3/HSO BALSA STABILIZER LI-:--- - R 55 BALSA 3ZH BALSA GADGETS 3/B 55 BALSA LEADING EDGE COVER WITH MIL H B L MYIAR / CREATE DOWN THRAST RY PIVOTING FIREWALL I/B REARWARD AT BGTTTRAP LU BETWEEN ENGINE N FIREWALL I/IA DIA I-I/A DIAMGSIC WIRE WHEELS 3/B SO BALSA TRAILING EDGE COG 049 ENGINE ISEE ABOVE RUN WITH B-3 NYLON PROP I/B PLY FIREWALL S IS TRAPPED BETWEEN FIREWALL AND ENGINE BACKPLATE FUSELAGE SIDE VIEW 3/B SO BALSA RUNSEUS 4 PLACES -TO HOLD POLON INTO FUSELAGE 4 BALSA GYEET PLATFORM 3/TB GO BALSA RUNNERS 1/4 SQ BALSA SUPPORTS FUSELAGE TOP VIEW VIUDIA MUSIC WIRE WILLIAMS BROS JjIPATTERNr Il/H WHEELS LIGHTI 5/32 BALSA SHEET FUSELAGEI\ BOX-GIDES TOP BOTTOM I03H5K COMPUTERIZES 3/K/GA ND FRIESTAD LBDOWELI STAB HOLD DOWNrI 3D2 BALSARUDDER SHEET RGDDEH 1/ROOWELS FSA STABILIZER ATTACH Il D/3ZT 5/PB BALSA RUDDER BRACES MODEL AVIATION POTATO MAN DESIGNED BY JIM HAGOBY INKED PLAN 80 JOE DENKRRCO ALL RIGUTSSUEET1 RESEMOTOI OF ILA N -4 U likely survive power testing may break prop two major damage far less likely Test-mn engine sure have good needle-valve setting will run out full eyedropper engine will run about 30 seconds full eyedropper tankand thats plenty model have starting problems simply refill tank before crank up engine again use syringe fill tank can refill eyedropper engine running little practice first powered flights should launched slighfly right wind short engine runsonly few seconds judged model launching fuel just left eyedropper fuel left line good few seconds power thats enough let model get high enough see what its doing Thrust adjustments powered FF models effective low speedsthe early part powered flight As model picks up speed flying surfaces have effect used adjust part climb What want gentle right-hand turn under power nose up model wants go immediately left no warps misaligned parts A2 shim right thrust needed Glue strip A2 plywood perhaps 1/g wide left side firewall engine points right viewed rear model imaginary cockpit Reverse above adjustment model immediately heads too much right after launch Potato Mans natural arrangement forces downthrust underslung rudder neutral thrustline give right-turn tendency anyway adjustment should relatively simple patient mnke small adjustment time increase engine run length until satisfied model climbing safe right-hand turn Likewise dont concern yourself transition power glide point glide itself long its relatively safe model isnt really high enough yet normal flight wont get proper reaction until can give longer engine run satisfied short engine runs gradually increase length engine run maybe three four seconds time observe model Now thrust adjustments less effective tendency turn too much way another controlled rudder Sand carve some A6 x a triangular shape like piece trailingedge stock Cut /2-inch lengths glue appropriate side rudder power turn blunt fat edge toward rearsee rudder offset used XB-70 Start bottom rudder use piece time Example Model turns too tightly right extended engine run after initial climb OK solution give left rudder gluing strip rudder-trim material bottom left side rudder again viewed rear Repeat necessary add longer shorter strips until model continues climb safely As thrust adjustments reverse above instructions climb too tight right Above patient power trimming Take extra flight two necessary get good look what model doing Haste really does make waste As long power pattern safe engine run can continue increased suit taste limitations flying field size eyedropper point normal powered free flight model trim would concentrate finetuning glide tilting stab nice smooth circle chose model like blunt airfoil wanted hold performance back bit lessen risk losing model models will have some sort natural turn anyway Now can fill tank much dare really have some fun spuds odel Aviation