MOST COMPETITIVE events have reached state sophistication re quires complete control function function has very slow receive much attention has pro peller Luckily prop manufacturers have done good job providing com petitive modeler wide se lection also some very well designed propellers Wood propellers generally popular props competition although some events cast fiberglass props quite popular Nylon propellers usually reserved sport flyer selection propeller material usually deter mined two things namely applica tion economics events high engine performance essential nylon props rarely used due fact nylon prop may fail high rpms can severe bodily injury damage equipment addition nylon propeller tends flatten out lose pitch time fiberglass wood prop will other hand impractical sport flyer use $500 fiberglass prop break $100 wood prop landing nylon prop far best bet Ironically molded nylon prop cluding fiberglass filled cause manufacturing techniques consistent performers weights thicknesses balance pitch similar nylon props essentially identical however true wood cast fiberglass props wood props machined dimen sions will vary different pieces wood used blanks also ma chining tolerances Fiberglass props usually cast hand very time-con suming process Because di mension props will vary over map prop another intent article describe processes involved standardize cast fiberglass wood propellers intend tell what dimensions should use individual applica tion up determine trial error five critical factors standardizing props diameter pitch blade width blade thickness balance addition other factors include blade design airfoil Most factors can quickly re duced ballpark range through either availability trial error stance fly FAI free flight know need about 7-3 prop want eliminate possible breakage choose fiberglass prop couple available brands fiberglass 7-3 props limited pretty much right Through trial error couple props try various blade pitches say 7-2 7-2 7-3 7-3 various blade thicknesses decide set dimen sions henceforth rework future props previously determined dimensions other hand fly CL B Speed know need about 7-10 prop dont want fiberglass cause usually ruin prop landing nothing else cost prohibitive select several props available brand basic 7-10 wood prop say 7-9 7-9 7-10 7-10 again through trial error determine best basic design applica tion determine set di mensions want future props either inspect reject enough produc tion props supply requirements rework own individual specifications tool re quired properly inspect propeller pitch gauge calipers micrometer prop balancer three basic tools combined various files sandpaper plus plenty time will give consistent performance propeller First need pitch gauge couple fine gauges can purchase $2000 $3000 local hobby shop can build accompanying article less $200 about two hours time Either way must have means determining propeller pitch pitch gauge measuring theoretical pitch actual pitch prop varies blade velocity rpm airplane velocity forward speed plus other factors operate pitch gauge mount prop mounting block align perpendicular slots tighten locking screw nut Next put mounting block first station usually shortest radius slot bring pointer up contacts underside pro peller sliding block forward backward adjust contact over entire width blade Mark off location pencil pen prop blade slot station blade station check record pitch blade pitch merely angle blade converted linear motion per revolution particular radius As shown Fig No Pitch Radius x Tangent Angle Therefore increase angle increase pitch vice versa pitch gauge merely pro tractor used measuring angle scale converted pitch station encounter situation bottom prop blade exactly flat safest bet file flat before going further pitch what want file sand station continued page 34 32 Model Aviation CI St ti ar J Propeller desired value corresponding station both blades should same Pre vious experience has shown can balance pitch between blades station within- /4 inch will close enough may also find blade pitch consistent over entire blade length may vary say 4-in pitch hub 6-in pitch tips perfectly OK long both blades consistent another After prop pitched both blades next check record blade thick nesses widths using caliper use dial caliper reading 001 find convenient However otber tool technique accurate 005 can used satisfactory results thickness larger desired value can reduce filing sand ing top side blade too thin much can Similarly blade widths should checked similar corrective techniques employed After pitch thickness width established station blend reworks form smooth contour tween stations Now verify exact radius blade can done simply accurately using round pin dowel diameter hole prop using calipers measure blade pin tip de termme actual radius must take account diameter pin Either add subtract one-half diameter dependent technique Next check balance using re liable technique Several inexpensive prop balancers available will pro duce satisfactory results preceding steps have followed should find minor touch-up required balance prop sanding lightly top side heavy blade attempt balance prop trimming radius blade pitch gauge presented article evolved gauge made own use prior other suitable gauge being available original model used machined 3/4 plexiglass base plate chemically etched stainless steel scale larger scale about pound heavier besieged requests friendly Rat Race competitors gauges made dozen using cast steel-filled epoxy base made RTV rubber mold project didnt go further since gauges cost us about $7500 apiece made couple cast plastic scale method although much cheaper too practical due time involved prototype units essentially bullet-proof gauge presented however bit accurate pos sibly practical because its lighter weight proper care should last lifetime materials required quite basic readily available Substitu tions can made sug gested materials techniques However critical dimensions shown must followed begin construction cut out 3/8 plywood details Particle board hard wood other material can used must nominal 3/8 thick cut out eleven 111/4 x 3/8 x 3 spruce strips available through Sig Mfg Co Next cut out paper scale maga zine page photocopy perhaps continued page 80 34 Model Aviation Step 6 Another view finished gauge Note letters identifying slots Step 7 Assembled gauge two slightly larger prototypes left has etched stainless steel scale right has molded plastic scale Step 9 Proper technique measuring blade width Dial calipers easy accurate Propeller continued page 35 better wont ruin magazine Cut out piece 3/32 plywood also piece 030 acetate other clear plastic outline scale Cut piece 3/32 plywood out line pointer bevel prop blade contact edge shown Cut out two pieces 3/32 plywood 5/8 x 1 1 piece 1/4 x 3/8 spruce assemble base use white glue glue 3/8 x 3/4 x 10 detail main plate shown clamp place Next glue 1/4 x 3/8 x 3 spruce details exactly 1/4 apart shown cut out 11 extra pieces same size spruce coat wax use spacers can glue clamp pieces place same time glue has dried spacers can easily re moved wax coating prevents glue adhering turn base over install two 2 #1 x ood screws up through bottom spruce detail shown photo Although step absolutely neces sary will greatly strengthen sembly Next apply contact adhesive prefer ably spray-on type plywood scale pattern Carefully position stall paper scale apply adhe sive 030 acetate again position install Carefully dress edges using fine file sanding block Drill counter sink two holes shown install scale base using #4 x wood screws Install pointer using #4 x wood screw flat washer Cut out paper slot identification strip apply base using contact adhesive careful align letters slots base Cover withScotch tape Make prop mounting detail using two pieces 3/32 plywood 5/8 x 1 1/4 x 3/8 x 1 piece spruce Glue two pieces plywood together drill hole center install ADVERTISERS INDEX Ace Radio Control26 Andrews Model Aircraft Company 73 Cleveland Model & Supply Co71 Concept Models74 Coverite72 DMECO deBolt69 Grish Brothers74 Jefs Friends75 J T Finley Co Distributors79 Peck-Polymers70 Rova Model Aviation Supplies . 76 Satellite City71 Scientific Models Inc1 Sig Mfg Company15 Williams Brothers78 World EnginesBack Cover 20/20 Graphics78 4-40 blind mounting nut under side Drill corresponding hole 1/8 diameter spruce align hole blind mounting nut glue assembly together Lightly sand sides 1/4 x 3/8 spruce slider clearance Next drill 1/8 hole center dowel pin Bevel shown about 30 degree angle 60 degree included angle cut off about all length Take 4-40 x 3/4 bolt run nut up head Install flat washer insert whole assembly through prop thread bolt mount ing block Run nut down clamp prop place now ready start measuring pitch prop am sure will find project truly rewarding form consistent formance per 80 Model Aviation FULL-SIZE PLANS No 105Harold Ruarks Sportsman$450 dream RC cabin job pretty smooth lines 40 powered full-house Flies well looks No 106Vought Kingfisher$450 semi-scale fully stuntable Control Line model Les King Its modified enough real pattern ability 25 35 engines No 107Aeronca K$200 Rolfe Gregory outdid himself 24 wingspan rubber-powered Indoor Scale job old-time lightplane new did 90 secondsbut minute sure No108 Electric One$375 Did anyone say couldnt done Dick Sarpolus Astro 25 powered RC job can perform pattern No 100 HinnantsF-5$450 ultimate maneuverability smoothness 60 Pattern job has No101 Short Seamew$300 40-powered Class Carrier model good prototype lends itself innovations No 102 French Wench$225 Free Flight Classes 1/2A 049 051 fully tested design No 103 Kloud King$400 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF No 104 Wiley Post Biplane$225 Petite durable scale design either rubber tail wagger pulse rudder Circle numbers plans wish order 100101102103104105106107108 Enclosed $ NAME STREET CITY 5 STATEZIP Price includes first-class postage Send check money order payable Model Aviation AMA 806 Fifteenth St. NW. Washington DC 20005
Edition: Model Aviation - 1975/08
Page Numbers: 32, 34, 80
Edition: Model Aviation - 1975/08
Page Numbers: 32, 34, 80
MOST COMPETITIVE events have reached state sophistication re quires complete control function function has very slow receive much attention has pro peller Luckily prop manufacturers have done good job providing com petitive modeler wide se lection also some very well designed propellers Wood propellers generally popular props competition although some events cast fiberglass props quite popular Nylon propellers usually reserved sport flyer selection propeller material usually deter mined two things namely applica tion economics events high engine performance essential nylon props rarely used due fact nylon prop may fail high rpms can severe bodily injury damage equipment addition nylon propeller tends flatten out lose pitch time fiberglass wood prop will other hand impractical sport flyer use $500 fiberglass prop break $100 wood prop landing nylon prop far best bet Ironically molded nylon prop cluding fiberglass filled cause manufacturing techniques consistent performers weights thicknesses balance pitch similar nylon props essentially identical however true wood cast fiberglass props wood props machined dimen sions will vary different pieces wood used blanks also ma chining tolerances Fiberglass props usually cast hand very time-con suming process Because di mension props will vary over map prop another intent article describe processes involved standardize cast fiberglass wood propellers intend tell what dimensions should use individual applica tion up determine trial error five critical factors standardizing props diameter pitch blade width blade thickness balance addition other factors include blade design airfoil Most factors can quickly re duced ballpark range through either availability trial error stance fly FAI free flight know need about 7-3 prop want eliminate possible breakage choose fiberglass prop couple available brands fiberglass 7-3 props limited pretty much right Through trial error couple props try various blade pitches say 7-2 7-2 7-3 7-3 various blade thicknesses decide set dimen sions henceforth rework future props previously determined dimensions other hand fly CL B Speed know need about 7-10 prop dont want fiberglass cause usually ruin prop landing nothing else cost prohibitive select several props available brand basic 7-10 wood prop say 7-9 7-9 7-10 7-10 again through trial error determine best basic design applica tion determine set di mensions want future props either inspect reject enough produc tion props supply requirements rework own individual specifications tool re quired properly inspect propeller pitch gauge calipers micrometer prop balancer three basic tools combined various files sandpaper plus plenty time will give consistent performance propeller First need pitch gauge couple fine gauges can purchase $2000 $3000 local hobby shop can build accompanying article less $200 about two hours time Either way must have means determining propeller pitch pitch gauge measuring theoretical pitch actual pitch prop varies blade velocity rpm airplane velocity forward speed plus other factors operate pitch gauge mount prop mounting block align perpendicular slots tighten locking screw nut Next put mounting block first station usually shortest radius slot bring pointer up contacts underside pro peller sliding block forward backward adjust contact over entire width blade Mark off location pencil pen prop blade slot station blade station check record pitch blade pitch merely angle blade converted linear motion per revolution particular radius As shown Fig No Pitch Radius x Tangent Angle Therefore increase angle increase pitch vice versa pitch gauge merely pro tractor used measuring angle scale converted pitch station encounter situation bottom prop blade exactly flat safest bet file flat before going further pitch what want file sand station continued page 34 32 Model Aviation CI St ti ar J Propeller desired value corresponding station both blades should same Pre vious experience has shown can balance pitch between blades station within- /4 inch will close enough may also find blade pitch consistent over entire blade length may vary say 4-in pitch hub 6-in pitch tips perfectly OK long both blades consistent another After prop pitched both blades next check record blade thick nesses widths using caliper use dial caliper reading 001 find convenient However otber tool technique accurate 005 can used satisfactory results thickness larger desired value can reduce filing sand ing top side blade too thin much can Similarly blade widths should checked similar corrective techniques employed After pitch thickness width established station blend reworks form smooth contour tween stations Now verify exact radius blade can done simply accurately using round pin dowel diameter hole prop using calipers measure blade pin tip de termme actual radius must take account diameter pin Either add subtract one-half diameter dependent technique Next check balance using re liable technique Several inexpensive prop balancers available will pro duce satisfactory results preceding steps have followed should find minor touch-up required balance prop sanding lightly top side heavy blade attempt balance prop trimming radius blade pitch gauge presented article evolved gauge made own use prior other suitable gauge being available original model used machined 3/4 plexiglass base plate chemically etched stainless steel scale larger scale about pound heavier besieged requests friendly Rat Race competitors gauges made dozen using cast steel-filled epoxy base made RTV rubber mold project didnt go further since gauges cost us about $7500 apiece made couple cast plastic scale method although much cheaper too practical due time involved prototype units essentially bullet-proof gauge presented however bit accurate pos sibly practical because its lighter weight proper care should last lifetime materials required quite basic readily available Substitu tions can made sug gested materials techniques However critical dimensions shown must followed begin construction cut out 3/8 plywood details Particle board hard wood other material can used must nominal 3/8 thick cut out eleven 111/4 x 3/8 x 3 spruce strips available through Sig Mfg Co Next cut out paper scale maga zine page photocopy perhaps continued page 80 34 Model Aviation Step 6 Another view finished gauge Note letters identifying slots Step 7 Assembled gauge two slightly larger prototypes left has etched stainless steel scale right has molded plastic scale Step 9 Proper technique measuring blade width Dial calipers easy accurate Propeller continued page 35 better wont ruin magazine Cut out piece 3/32 plywood also piece 030 acetate other clear plastic outline scale Cut piece 3/32 plywood out line pointer bevel prop blade contact edge shown Cut out two pieces 3/32 plywood 5/8 x 1 1 piece 1/4 x 3/8 spruce assemble base use white glue glue 3/8 x 3/4 x 10 detail main plate shown clamp place Next glue 1/4 x 3/8 x 3 spruce details exactly 1/4 apart shown cut out 11 extra pieces same size spruce coat wax use spacers can glue clamp pieces place same time glue has dried spacers can easily re moved wax coating prevents glue adhering turn base over install two 2 #1 x ood screws up through bottom spruce detail shown photo Although step absolutely neces sary will greatly strengthen sembly Next apply contact adhesive prefer ably spray-on type plywood scale pattern Carefully position stall paper scale apply adhe sive 030 acetate again position install Carefully dress edges using fine file sanding block Drill counter sink two holes shown install scale base using #4 x wood screws Install pointer using #4 x wood screw flat washer Cut out paper slot identification strip apply base using contact adhesive careful align letters slots base Cover withScotch tape Make prop mounting detail using two pieces 3/32 plywood 5/8 x 1 1/4 x 3/8 x 1 piece spruce Glue two pieces plywood together drill hole center install ADVERTISERS INDEX Ace Radio Control26 Andrews Model Aircraft Company 73 Cleveland Model & Supply Co71 Concept Models74 Coverite72 DMECO deBolt69 Grish Brothers74 Jefs Friends75 J T Finley Co Distributors79 Peck-Polymers70 Rova Model Aviation Supplies . 76 Satellite City71 Scientific Models Inc1 Sig Mfg Company15 Williams Brothers78 World EnginesBack Cover 20/20 Graphics78 4-40 blind mounting nut under side Drill corresponding hole 1/8 diameter spruce align hole blind mounting nut glue assembly together Lightly sand sides 1/4 x 3/8 spruce slider clearance Next drill 1/8 hole center dowel pin Bevel shown about 30 degree angle 60 degree included angle cut off about all length Take 4-40 x 3/4 bolt run nut up head Install flat washer insert whole assembly through prop thread bolt mount ing block Run nut down clamp prop place now ready start measuring pitch prop am sure will find project truly rewarding form consistent formance per 80 Model Aviation FULL-SIZE PLANS No 105Harold Ruarks Sportsman$450 dream RC cabin job pretty smooth lines 40 powered full-house Flies well looks No 106Vought Kingfisher$450 semi-scale fully stuntable Control Line model Les King Its modified enough real pattern ability 25 35 engines No 107Aeronca K$200 Rolfe Gregory outdid himself 24 wingspan rubber-powered Indoor Scale job old-time lightplane new did 90 secondsbut minute sure No108 Electric One$375 Did anyone say couldnt done Dick Sarpolus Astro 25 powered RC job can perform pattern No 100 HinnantsF-5$450 ultimate maneuverability smoothness 60 Pattern job has No101 Short Seamew$300 40-powered Class Carrier model good prototype lends itself innovations No 102 French Wench$225 Free Flight Classes 1/2A 049 051 fully tested design No 103 Kloud King$400 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF No 104 Wiley Post Biplane$225 Petite durable scale design either rubber tail wagger pulse rudder Circle numbers plans wish order 100101102103104105106107108 Enclosed $ NAME STREET CITY 5 STATEZIP Price includes first-class postage Send check money order payable Model Aviation AMA 806 Fifteenth St. NW. Washington DC 20005
Edition: Model Aviation - 1975/08
Page Numbers: 32, 34, 80
MOST COMPETITIVE events have reached state sophistication re quires complete control function function has very slow receive much attention has pro peller Luckily prop manufacturers have done good job providing com petitive modeler wide se lection also some very well designed propellers Wood propellers generally popular props competition although some events cast fiberglass props quite popular Nylon propellers usually reserved sport flyer selection propeller material usually deter mined two things namely applica tion economics events high engine performance essential nylon props rarely used due fact nylon prop may fail high rpms can severe bodily injury damage equipment addition nylon propeller tends flatten out lose pitch time fiberglass wood prop will other hand impractical sport flyer use $500 fiberglass prop break $100 wood prop landing nylon prop far best bet Ironically molded nylon prop cluding fiberglass filled cause manufacturing techniques consistent performers weights thicknesses balance pitch similar nylon props essentially identical however true wood cast fiberglass props wood props machined dimen sions will vary different pieces wood used blanks also ma chining tolerances Fiberglass props usually cast hand very time-con suming process Because di mension props will vary over map prop another intent article describe processes involved standardize cast fiberglass wood propellers intend tell what dimensions should use individual applica tion up determine trial error five critical factors standardizing props diameter pitch blade width blade thickness balance addition other factors include blade design airfoil Most factors can quickly re duced ballpark range through either availability trial error stance fly FAI free flight know need about 7-3 prop want eliminate possible breakage choose fiberglass prop couple available brands fiberglass 7-3 props limited pretty much right Through trial error couple props try various blade pitches say 7-2 7-2 7-3 7-3 various blade thicknesses decide set dimen sions henceforth rework future props previously determined dimensions other hand fly CL B Speed know need about 7-10 prop dont want fiberglass cause usually ruin prop landing nothing else cost prohibitive select several props available brand basic 7-10 wood prop say 7-9 7-9 7-10 7-10 again through trial error determine best basic design applica tion determine set di mensions want future props either inspect reject enough produc tion props supply requirements rework own individual specifications tool re quired properly inspect propeller pitch gauge calipers micrometer prop balancer three basic tools combined various files sandpaper plus plenty time will give consistent performance propeller First need pitch gauge couple fine gauges can purchase $2000 $3000 local hobby shop can build accompanying article less $200 about two hours time Either way must have means determining propeller pitch pitch gauge measuring theoretical pitch actual pitch prop varies blade velocity rpm airplane velocity forward speed plus other factors operate pitch gauge mount prop mounting block align perpendicular slots tighten locking screw nut Next put mounting block first station usually shortest radius slot bring pointer up contacts underside pro peller sliding block forward backward adjust contact over entire width blade Mark off location pencil pen prop blade slot station blade station check record pitch blade pitch merely angle blade converted linear motion per revolution particular radius As shown Fig No Pitch Radius x Tangent Angle Therefore increase angle increase pitch vice versa pitch gauge merely pro tractor used measuring angle scale converted pitch station encounter situation bottom prop blade exactly flat safest bet file flat before going further pitch what want file sand station continued page 34 32 Model Aviation CI St ti ar J Propeller desired value corresponding station both blades should same Pre vious experience has shown can balance pitch between blades station within- /4 inch will close enough may also find blade pitch consistent over entire blade length may vary say 4-in pitch hub 6-in pitch tips perfectly OK long both blades consistent another After prop pitched both blades next check record blade thick nesses widths using caliper use dial caliper reading 001 find convenient However otber tool technique accurate 005 can used satisfactory results thickness larger desired value can reduce filing sand ing top side blade too thin much can Similarly blade widths should checked similar corrective techniques employed After pitch thickness width established station blend reworks form smooth contour tween stations Now verify exact radius blade can done simply accurately using round pin dowel diameter hole prop using calipers measure blade pin tip de termme actual radius must take account diameter pin Either add subtract one-half diameter dependent technique Next check balance using re liable technique Several inexpensive prop balancers available will pro duce satisfactory results preceding steps have followed should find minor touch-up required balance prop sanding lightly top side heavy blade attempt balance prop trimming radius blade pitch gauge presented article evolved gauge made own use prior other suitable gauge being available original model used machined 3/4 plexiglass base plate chemically etched stainless steel scale larger scale about pound heavier besieged requests friendly Rat Race competitors gauges made dozen using cast steel-filled epoxy base made RTV rubber mold project didnt go further since gauges cost us about $7500 apiece made couple cast plastic scale method although much cheaper too practical due time involved prototype units essentially bullet-proof gauge presented however bit accurate pos sibly practical because its lighter weight proper care should last lifetime materials required quite basic readily available Substitu tions can made sug gested materials techniques However critical dimensions shown must followed begin construction cut out 3/8 plywood details Particle board hard wood other material can used must nominal 3/8 thick cut out eleven 111/4 x 3/8 x 3 spruce strips available through Sig Mfg Co Next cut out paper scale maga zine page photocopy perhaps continued page 80 34 Model Aviation Step 6 Another view finished gauge Note letters identifying slots Step 7 Assembled gauge two slightly larger prototypes left has etched stainless steel scale right has molded plastic scale Step 9 Proper technique measuring blade width Dial calipers easy accurate Propeller continued page 35 better wont ruin magazine Cut out piece 3/32 plywood also piece 030 acetate other clear plastic outline scale Cut piece 3/32 plywood out line pointer bevel prop blade contact edge shown Cut out two pieces 3/32 plywood 5/8 x 1 1 piece 1/4 x 3/8 spruce assemble base use white glue glue 3/8 x 3/4 x 10 detail main plate shown clamp place Next glue 1/4 x 3/8 x 3 spruce details exactly 1/4 apart shown cut out 11 extra pieces same size spruce coat wax use spacers can glue clamp pieces place same time glue has dried spacers can easily re moved wax coating prevents glue adhering turn base over install two 2 #1 x ood screws up through bottom spruce detail shown photo Although step absolutely neces sary will greatly strengthen sembly Next apply contact adhesive prefer ably spray-on type plywood scale pattern Carefully position stall paper scale apply adhe sive 030 acetate again position install Carefully dress edges using fine file sanding block Drill counter sink two holes shown install scale base using #4 x wood screws Install pointer using #4 x wood screw flat washer Cut out paper slot identification strip apply base using contact adhesive careful align letters slots base Cover withScotch tape Make prop mounting detail using two pieces 3/32 plywood 5/8 x 1 1/4 x 3/8 x 1 piece spruce Glue two pieces plywood together drill hole center install ADVERTISERS INDEX Ace Radio Control26 Andrews Model Aircraft Company 73 Cleveland Model & Supply Co71 Concept Models74 Coverite72 DMECO deBolt69 Grish Brothers74 Jefs Friends75 J T Finley Co Distributors79 Peck-Polymers70 Rova Model Aviation Supplies . 76 Satellite City71 Scientific Models Inc1 Sig Mfg Company15 Williams Brothers78 World EnginesBack Cover 20/20 Graphics78 4-40 blind mounting nut under side Drill corresponding hole 1/8 diameter spruce align hole blind mounting nut glue assembly together Lightly sand sides 1/4 x 3/8 spruce slider clearance Next drill 1/8 hole center dowel pin Bevel shown about 30 degree angle 60 degree included angle cut off about all length Take 4-40 x 3/4 bolt run nut up head Install flat washer insert whole assembly through prop thread bolt mount ing block Run nut down clamp prop place now ready start measuring pitch prop am sure will find project truly rewarding form consistent formance per 80 Model Aviation FULL-SIZE PLANS No 105Harold Ruarks Sportsman$450 dream RC cabin job pretty smooth lines 40 powered full-house Flies well looks No 106Vought Kingfisher$450 semi-scale fully stuntable Control Line model Les King Its modified enough real pattern ability 25 35 engines No 107Aeronca K$200 Rolfe Gregory outdid himself 24 wingspan rubber-powered Indoor Scale job old-time lightplane new did 90 secondsbut minute sure No108 Electric One$375 Did anyone say couldnt done Dick Sarpolus Astro 25 powered RC job can perform pattern No 100 HinnantsF-5$450 ultimate maneuverability smoothness 60 Pattern job has No101 Short Seamew$300 40-powered Class Carrier model good prototype lends itself innovations No 102 French Wench$225 Free Flight Classes 1/2A 049 051 fully tested design No 103 Kloud King$400 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF No 104 Wiley Post Biplane$225 Petite durable scale design either rubber tail wagger pulse rudder Circle numbers plans wish order 100101102103104105106107108 Enclosed $ NAME STREET CITY 5 STATEZIP Price includes first-class postage Send check money order payable Model Aviation AMA 806 Fifteenth St. NW. Washington DC 20005
