Control Surface Flutter An effective solution serious problem EN Carlin Hulick f have flown RC length time chances good have experienced control-surface flutter Beside scaring humming sound flutter will severely stress control surfaces can cause breakage support structure hinges linkages servo gear trains control surfaces know exists realize dangerous problem does happen what can eliminate prevent happening Flutter starts air flow across surface causes force surface tries move Slop linkages bending structure allows some movement surfaces spring back force applied again flutter begins rate flutter can become quite high hear hum fluttering surface happens immediately cut throttle climb cut speed relieve force before flutter causes damage model and/or complete loss control degree movement during flutter amazing have watched surfaces fluttering through field glasses high-rate surface travel 1/2 inch unusual Try bending surfaces much against linkages servo will see high forces being applied following cures generally suggested stop flutter 1 Lessen seal opening between surfaces hingeline MonoKote across gap better building practices can help will cure cases flutter 2 Lower speed lessens forces will stop problem thats no fun 3 Eliminate slop linkages Complex linkages such wing-mounted bellcranks increase problem wear through use Coat solder wire end five-minute epoxy gives gradual loosening will occur time linkage 4 Strip ailerons go end wing will flutter easily due tip vortex effects Most newer designs show tip goes back trailing edge 5 Static balance control surfaces lessens inertial effects moving surface usually provides cure items worth considering best answer statically balance control surfaces Look full-scale P 38 notice balance weights elevator Prototypes P-38 flew faster engineers experienced earlier designs Flutter occurred eliminated balanced surfaces Most full-scale highperformance aircraft have balanced control surfaces models its usually ailerons flutter because large areas complex linkages Flutter sometimes found elevators thoughespecially two-piece surfaces flimsy pushrods 40 size Ugly Stick model thats famous aileron flutter problems have seen lot problem 40 Sticks favorite models have flown lot recent Stick some aileron flutter problems greatly October 1994 51 Solder weight Balance until aileron line wing chord Experience Excitement Lanier RC TR-260 An ARF Aerobatic Enthusiast Fuselage Length 44 Flying Weight 6 7 lbs Rec Engine Size 45 60 60- 91 4 Stroke Send SASEI FREE Color Catalog PO Box 458Phone 404-532-6401 Oakwood GA 30566 FAX 404-532-2163 Designed Manufactured Americal BEFORE YOU SELECT YOUR NEXT AIRCRAFT RELATED ITEM.CHECK YOUR MAMATM S MINIATURE TION RENCE AL MARATM Miniature Aviation Reference Annual has taken challenge constructing what far complete product service reference publication miniature aviation community catalog Thousands items hundreds manufacturers large small categorized supply sources Custom ser vices also listed goal list miniature fixed-wing air craft product service has reliable supply source US small cottage producers marketing giants descriptions illustrations feasible extensive heli section 1995 MARATM publication will help make hundreds hours fruitful 10% profits MARATM will sponsor local club activity competition youth education miniature aviation Losing control can nightmare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical in-house radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control 135 Futaba ______ jAIAThONICS 3702 N Pace Pensacola FL 32505 repair information 904 434-0909 Wing Span 60 Area 620 sq Radio Channels 4 aggravated installation powerful engine tried usual fixes checking linkages tightening servo mounts MonoKote full span over hinge gaps nothing helped until static balance doneno flutter application simple Balance weights installed under wing aileron control horn mounted center aileron near hinged edge /16 music wire weight installed counterbalance aileron weight bend made end wire solder wrapped around until aileron balanced sits level Position wing level flight angle bottom up Disconnect pushrods add solder until aileron returns level afier being moved Apply some five-minute epoxy over solder wire connection horn stays together during flight weight should positioned does hit wing application full down aileron Elevator balance can done similar way needed simple fix made Stick fly fine steep dives have used method other models flutter tendencies has always solved problem Give try * z 1-800-962-7802 Toll Free Order Line Orders Only Pleasel 52 Model Aviation AIN CONIROL
Edition: Model Aviation - 1994/10
Page Numbers: 51, 52
Edition: Model Aviation - 1994/10
Page Numbers: 51, 52
Control Surface Flutter An effective solution serious problem EN Carlin Hulick f have flown RC length time chances good have experienced control-surface flutter Beside scaring humming sound flutter will severely stress control surfaces can cause breakage support structure hinges linkages servo gear trains control surfaces know exists realize dangerous problem does happen what can eliminate prevent happening Flutter starts air flow across surface causes force surface tries move Slop linkages bending structure allows some movement surfaces spring back force applied again flutter begins rate flutter can become quite high hear hum fluttering surface happens immediately cut throttle climb cut speed relieve force before flutter causes damage model and/or complete loss control degree movement during flutter amazing have watched surfaces fluttering through field glasses high-rate surface travel 1/2 inch unusual Try bending surfaces much against linkages servo will see high forces being applied following cures generally suggested stop flutter 1 Lessen seal opening between surfaces hingeline MonoKote across gap better building practices can help will cure cases flutter 2 Lower speed lessens forces will stop problem thats no fun 3 Eliminate slop linkages Complex linkages such wing-mounted bellcranks increase problem wear through use Coat solder wire end five-minute epoxy gives gradual loosening will occur time linkage 4 Strip ailerons go end wing will flutter easily due tip vortex effects Most newer designs show tip goes back trailing edge 5 Static balance control surfaces lessens inertial effects moving surface usually provides cure items worth considering best answer statically balance control surfaces Look full-scale P 38 notice balance weights elevator Prototypes P-38 flew faster engineers experienced earlier designs Flutter occurred eliminated balanced surfaces Most full-scale highperformance aircraft have balanced control surfaces models its usually ailerons flutter because large areas complex linkages Flutter sometimes found elevators thoughespecially two-piece surfaces flimsy pushrods 40 size Ugly Stick model thats famous aileron flutter problems have seen lot problem 40 Sticks favorite models have flown lot recent Stick some aileron flutter problems greatly October 1994 51 Solder weight Balance until aileron line wing chord Experience Excitement Lanier RC TR-260 An ARF Aerobatic Enthusiast Fuselage Length 44 Flying Weight 6 7 lbs Rec Engine Size 45 60 60- 91 4 Stroke Send SASEI FREE Color Catalog PO Box 458Phone 404-532-6401 Oakwood GA 30566 FAX 404-532-2163 Designed Manufactured Americal BEFORE YOU SELECT YOUR NEXT AIRCRAFT RELATED ITEM.CHECK YOUR MAMATM S MINIATURE TION RENCE AL MARATM Miniature Aviation Reference Annual has taken challenge constructing what far complete product service reference publication miniature aviation community catalog Thousands items hundreds manufacturers large small categorized supply sources Custom ser vices also listed goal list miniature fixed-wing air craft product service has reliable supply source US small cottage producers marketing giants descriptions illustrations feasible extensive heli section 1995 MARATM publication will help make hundreds hours fruitful 10% profits MARATM will sponsor local club activity competition youth education miniature aviation Losing control can nightmare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical in-house radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control 135 Futaba ______ jAIAThONICS 3702 N Pace Pensacola FL 32505 repair information 904 434-0909 Wing Span 60 Area 620 sq Radio Channels 4 aggravated installation powerful engine tried usual fixes checking linkages tightening servo mounts MonoKote full span over hinge gaps nothing helped until static balance doneno flutter application simple Balance weights installed under wing aileron control horn mounted center aileron near hinged edge /16 music wire weight installed counterbalance aileron weight bend made end wire solder wrapped around until aileron balanced sits level Position wing level flight angle bottom up Disconnect pushrods add solder until aileron returns level afier being moved Apply some five-minute epoxy over solder wire connection horn stays together during flight weight should positioned does hit wing application full down aileron Elevator balance can done similar way needed simple fix made Stick fly fine steep dives have used method other models flutter tendencies has always solved problem Give try * z 1-800-962-7802 Toll Free Order Line Orders Only Pleasel 52 Model Aviation AIN CONIROL
