Control Line Scale PART #1 STOPNOTE SHORT ARM Mike Stoti- -- ONE SIDE TOP VIEW PUSHROD TO PUSHROD HIGH THROTTLE ELEVATOR TO MOTOR WELL THE FLYING season starting us means dusting off old Scale models worrying about test flying model have spent winter building hope ideas column will help get off better enthusiastic start may wonder Scale models fly competition get different options operate proper time flying sometimes under very adverse conditions methods illus trated may give better under standing least offer some suggestions operating multiple control systems Sturdi-Built Model Mfg has flight control system better known J Roberts Three Line Unit available two different bellcrank units dif ference two units assembly bellcrank components facilitate easiest mounting types models upright unit mounts top bellcrank floor suspended unit mounts bottom side floor use upright bellcrank find getting high throttle should getting low throttle can use suspended bellcrank instead up right version will give cor rect throttle movements Both bellcranks interchangeable achieve correct throttle movements need can make own three line bellcrank assembling two belicranks shown Diagram No type bellcrank normally much stronger other commercially available ones therefore recommended heavier scale models homemade bellcrank easily adjustable either direction throttle movement just turning over Part No placing elevator bellcrank reverse side amount travel needed match amount throttle travel can very easily obtained moving stops 4-40 bolts distance needed good advantage style bellcrank units additional operations possible hook up throttle link age As know becoming necessary objective scale Micro switches important addi tion system used along throttle pushrod shown Method No throttle pushrod can used activate electrical servo Fox flanged wheel collars attached pushrod shown illustra tion used trip micro switches PART #1 FRONT VIEW N.%PLYWOOD FLOOR PART #2PUSHROD TO 0ELEVATOR LOW THROTTLE STOP DIAGRAM #1 must adjusted properly assure full movement throttle pushrod yet activate micro switches Carl Goldberg Mfg has commercial unit available market has micro switches servo battery box other necessary material make type linkage complete set biggest draw-back system have throttle way down low before switch will engage servo hooked up flaps and/or landing gear switch must stay engaged throttle low position until flaps and/or landing gear way down may serious handicap especially plane heavy TO SERVO HIGH.*-MICRO SWITCH THROTTLEJ~fPUSHROO V. OLLARNYLON BEARING z TO SERVO LOW THROTTLE 0 tICROwITCH NYLON BEARING METHOD #1 normally needs power stay airborne After flaps landing gear down can throttle back up al high throttle will allow attain flying speed allow vary landing speed take off cannot use high throttle until air borne advance high throttle trip micro switch Method No 2 very similar Method No necessary throttle way down low lower flaps and/or landing gear method uses brushes activate servo point needed good realism full-sized air craft normally does throttle way low before lowering flaps landing gear So method go approxi mately half throttle point landing gear will lower give effect want brushes have easily accessible because need adjusted time time Adjustment made bending forward back ward will properly activate micro switch connect operations either method use servo raise lower flaps link another pushrod servo activate another switch mechanically move landing gear TO SERVO HIGH THROTTLMICRO SWITCH BRUSHESPUSHROO ING COLLAR TO SERVO MICRO SWITCH z MEDIUM THROTTLEPUSHROD LAJ COLLARBEARING TO SERVO LOW THROTTLMICRO SWITCH BRUSHES*..PUSHROO 4 BEARING METHOD #2 COLLAR last method econom ical way hook up just flaps model three-line unit con nects throttle pushrod flap pushrod together throttle low flaps will down increasing throt tle will raise flaps throttle high position flaps way up newest thing control line used achieve mechanical options flight product very similar radio concon tinued page 73 July1975 27 CL Scale continued page 27 trol C/L Electrical Control System uses two insulated lines through coded signal sent decoder model operates servos ac complish desired operations sys tem has up six servos can used options flight independent other can activated same time just time An example twinengine Tigercat individual throttle flaps retractable landing gear operating landing gear doors tank drop controls proportional want flaps half way down just move control lever half way down obtain information system write address 118 E Wheeler Ave North Mankato Minn 56001 As columnist Control Line Scale need help new better ideas building detailing controlling scale models Please write address given earlier column ideas would like share FF Duration continued page 37 trophies unofficial Compressed Air event 1975 Nats event will held two three evenings weather right Hoozier Whirlwind motors tanks assembled 1930vintage parts can obtained original manufacturer Bertram Pond 128 Warren Terrace Longmeadow Mass 01106 Oldtimer Models PO Box 18002 Milwaukee Wisc 53218 Theyll sell plans too Typical CA models using Hoozier motor 6-ft span ultra-light construction essential Bob Knutson plans furnish compressed air NATS contestants via batteryelectric powered air compressor wouldnt renting nitrogen bottle simpler Too bad way blistering hands old tire pump part fun Would modern bump-valve CO-2 engine work compressed air tried OK motor turned Cox 6-3 prop 7000 rpm 180 psi pressure Proper CA engines turned much larger prop rather slowly tank Possibly could cobble up something aluminum beverage cans warned compressed air can dangerous gets loose better test home-brew hard ware double pressure intend use Use water pressure test must use air put shrapnel shield tween would probably better off around using H oozier $16a8 add $150 handling Designed Electric Starters Start er batteries gallon can Propel lers & wrenches other accessories Featuring Knot-free White Pine Precut Sanded Parts Nails plastic legs prebent aircraft cradles guards $498 add 50e handling also available Universal starter insert Postpaid Kavan etc Strongest pliable non marring material available . Large gripping area low wear/long life. Machined Aluminum hubs canter hole 5/16 diam eter. Positive lock set screw . Build-a-starter using auto-type motor Dealer inquires invited R oducts 3131 Alpine Street NE. North Canton Ohio 44721 July1975 73 Starter & Tool CaddyStarter Tips Deluxe Kit
Edition: Model Aviation - 1975/07
Page Numbers: 27, 73
Control Line Scale PART #1 STOPNOTE SHORT ARM Mike Stoti- -- ONE SIDE TOP VIEW PUSHROD TO PUSHROD HIGH THROTTLE ELEVATOR TO MOTOR WELL THE FLYING season starting us means dusting off old Scale models worrying about test flying model have spent winter building hope ideas column will help get off better enthusiastic start may wonder Scale models fly competition get different options operate proper time flying sometimes under very adverse conditions methods illus trated may give better under standing least offer some suggestions operating multiple control systems Sturdi-Built Model Mfg has flight control system better known J Roberts Three Line Unit available two different bellcrank units dif ference two units assembly bellcrank components facilitate easiest mounting types models upright unit mounts top bellcrank floor suspended unit mounts bottom side floor use upright bellcrank find getting high throttle should getting low throttle can use suspended bellcrank instead up right version will give cor rect throttle movements Both bellcranks interchangeable achieve correct throttle movements need can make own three line bellcrank assembling two belicranks shown Diagram No type bellcrank normally much stronger other commercially available ones therefore recommended heavier scale models homemade bellcrank easily adjustable either direction throttle movement just turning over Part No placing elevator bellcrank reverse side amount travel needed match amount throttle travel can very easily obtained moving stops 4-40 bolts distance needed good advantage style bellcrank units additional operations possible hook up throttle link age As know becoming necessary objective scale Micro switches important addi tion system used along throttle pushrod shown Method No throttle pushrod can used activate electrical servo Fox flanged wheel collars attached pushrod shown illustra tion used trip micro switches PART #1 FRONT VIEW N.%PLYWOOD FLOOR PART #2PUSHROD TO 0ELEVATOR LOW THROTTLE STOP DIAGRAM #1 must adjusted properly assure full movement throttle pushrod yet activate micro switches Carl Goldberg Mfg has commercial unit available market has micro switches servo battery box other necessary material make type linkage complete set biggest draw-back system have throttle way down low before switch will engage servo hooked up flaps and/or landing gear switch must stay engaged throttle low position until flaps and/or landing gear way down may serious handicap especially plane heavy TO SERVO HIGH.*-MICRO SWITCH THROTTLEJ~fPUSHROO V. OLLARNYLON BEARING z TO SERVO LOW THROTTLE 0 tICROwITCH NYLON BEARING METHOD #1 normally needs power stay airborne After flaps landing gear down can throttle back up al high throttle will allow attain flying speed allow vary landing speed take off cannot use high throttle until air borne advance high throttle trip micro switch Method No 2 very similar Method No necessary throttle way down low lower flaps and/or landing gear method uses brushes activate servo point needed good realism full-sized air craft normally does throttle way low before lowering flaps landing gear So method go approxi mately half throttle point landing gear will lower give effect want brushes have easily accessible because need adjusted time time Adjustment made bending forward back ward will properly activate micro switch connect operations either method use servo raise lower flaps link another pushrod servo activate another switch mechanically move landing gear TO SERVO HIGH THROTTLMICRO SWITCH BRUSHESPUSHROO ING COLLAR TO SERVO MICRO SWITCH z MEDIUM THROTTLEPUSHROD LAJ COLLARBEARING TO SERVO LOW THROTTLMICRO SWITCH BRUSHES*..PUSHROO 4 BEARING METHOD #2 COLLAR last method econom ical way hook up just flaps model three-line unit con nects throttle pushrod flap pushrod together throttle low flaps will down increasing throt tle will raise flaps throttle high position flaps way up newest thing control line used achieve mechanical options flight product very similar radio concon tinued page 73 July1975 27 CL Scale continued page 27 trol C/L Electrical Control System uses two insulated lines through coded signal sent decoder model operates servos ac complish desired operations sys tem has up six servos can used options flight independent other can activated same time just time An example twinengine Tigercat individual throttle flaps retractable landing gear operating landing gear doors tank drop controls proportional want flaps half way down just move control lever half way down obtain information system write address 118 E Wheeler Ave North Mankato Minn 56001 As columnist Control Line Scale need help new better ideas building detailing controlling scale models Please write address given earlier column ideas would like share FF Duration continued page 37 trophies unofficial Compressed Air event 1975 Nats event will held two three evenings weather right Hoozier Whirlwind motors tanks assembled 1930vintage parts can obtained original manufacturer Bertram Pond 128 Warren Terrace Longmeadow Mass 01106 Oldtimer Models PO Box 18002 Milwaukee Wisc 53218 Theyll sell plans too Typical CA models using Hoozier motor 6-ft span ultra-light construction essential Bob Knutson plans furnish compressed air NATS contestants via batteryelectric powered air compressor wouldnt renting nitrogen bottle simpler Too bad way blistering hands old tire pump part fun Would modern bump-valve CO-2 engine work compressed air tried OK motor turned Cox 6-3 prop 7000 rpm 180 psi pressure Proper CA engines turned much larger prop rather slowly tank Possibly could cobble up something aluminum beverage cans warned compressed air can dangerous gets loose better test home-brew hard ware double pressure intend use Use water pressure test must use air put shrapnel shield tween would probably better off around using H oozier $16a8 add $150 handling Designed Electric Starters Start er batteries gallon can Propel lers & wrenches other accessories Featuring Knot-free White Pine Precut Sanded Parts Nails plastic legs prebent aircraft cradles guards $498 add 50e handling also available Universal starter insert Postpaid Kavan etc Strongest pliable non marring material available . Large gripping area low wear/long life. Machined Aluminum hubs canter hole 5/16 diam eter. Positive lock set screw . Build-a-starter using auto-type motor Dealer inquires invited R oducts 3131 Alpine Street NE. North Canton Ohio 44721 July1975 73 Starter & Tool CaddyStarter Tips Deluxe Kit