U. U U U U U U U U U UUUU U mu. U. U U U U U U Delta Dart built hundreds thousands Dart-Too second step using design tool developing beginning modelers skills Designed Frank Ehling Text Hobie Steele THE DART-TOO AMA project conceived like its predecessor Delta Dart also known AMA Cub Frank Ehling Technical Director Academy Model Aeronautics off-duty hours Frank donated design did Delta Dart MOD EL AVIATION tool used second step developing beginners aeromodeling skill Dart-Too uses AMA Cub wing tail designed follow-up AMA Cub provides additional feeling accomplishment builder because fuselage profile nearly resembles full-scale aircraft does basic AMA Cub allows beginner produce second model can built approximately same time about hour AMA Cub further develops ability work hands much preferred stepping up too-complicated model result drop before comple tion Some may feel Dart-Too sufficiently advanced AMA Cub has found building two three AMA Cubs model advances workmanship young modelers skill dexterity pro gresses understanding also increases model completed Like AMA Cub Dart-Too can used class room teaching fundamentals aerodynamics geometry mathematics also providing student satisfaction carrying project through comple tion pleasure flight continued page 46 July1975 43 DART-TOO Notes Construction structure 1/16 X 1/8-in balsa except motor stick cut 1/8 X 3/8 simplicity plan appears can used covering material simply removing two pages magazine taping gether underneath gluing appropriate wood sizes directly page within outlines indicated Dont worry about weight paperits light enough White glue diluted 50 percent water works well dilute glue coveringuse full strength undiluted balsa-to-balsa joints Very little glue needed adhere framework covering excess should wiped away before attaching balsa wood strips covering wing stabilizer cover ing will bottom case creates no problem vertical fin made right along fuselage other sur faces side covered lightness Pay special attention nose fuselage propeller thrust bearing positioned Cut off 1/16-in slice top shown glue directly below make step plan indicates done rubber motor will clear wing pin inserted aft wing serves rear hook anchor rubber motor After wing has completed before being bent provide dihedral glue wing bottom motor stick Place Delta-Too upside down build ing board workbench resting vertical fin fuselage nose pin wing tips down board bench provide proper amount dihedral Although landing gear neces sary ROG Rise-Off-Ground provides change normal hand launch offers realistic flight pattern landing gear may bent 032 music wire small wheels cut balsa cannabalized small model may use landing gear North Pacific Skeeter similar readyto-fly model An AMA Cub propeller assembly Sig Manufacturing Co 401 S Front St Montezuma Iowa 50171 perfect Dart-Too prop assembly ready-to-fly North Pacific Skeeter avail able hobby shops super markets drug stores etc AMA Cub Delta Dart flight instruc tions can used getting Dart-Too perform air model shows tendency stall under power see sketch simply bend thin part plastic propeller assembly underneath right looking down above model facing away will cause model fly circles rather stall cannot stall its circling stalls glide correct adding small amount clay nose directly over thrust bearing lighter covering magazine page can improve flight characteristics may achieved covering mag azine plan plastic wrap followed choice lightweight covering tissue onionskin etc building Delta-Too may trace plan lightweight covering turn over building Delta-Toos balsa struc ture glued underneath covering completed covering will top flying surfaces Alternatively may use drawing construction plan model may covered tissue offering first lesson covering open structure model Use heaviest balsa wing lighter wood stabilizer vertical fin fuselage portion could either heavy lightweight balsa Stiff paper cardboard may sandwiched between two halves pilot cemented cockpit Dart-Too snapp low-wing second model ginner will enjoy building flying Re member practice makes perfect youor youngster youre teachingmay want build several before tackling advanced rubber fuel powered craft 46 Model Aviation same unique amazingly simple procedures used make DartToo used popular Delta Dartframawork assembles over paper tQ attached mixture half white- t tk inin* ~4ik
Edition: Model Aviation - 1975/07
Page Numbers: 43, 46
U. U U U U U U U U U UUUU U mu. U. U U U U U U Delta Dart built hundreds thousands Dart-Too second step using design tool developing beginning modelers skills Designed Frank Ehling Text Hobie Steele THE DART-TOO AMA project conceived like its predecessor Delta Dart also known AMA Cub Frank Ehling Technical Director Academy Model Aeronautics off-duty hours Frank donated design did Delta Dart MOD EL AVIATION tool used second step developing beginners aeromodeling skill Dart-Too uses AMA Cub wing tail designed follow-up AMA Cub provides additional feeling accomplishment builder because fuselage profile nearly resembles full-scale aircraft does basic AMA Cub allows beginner produce second model can built approximately same time about hour AMA Cub further develops ability work hands much preferred stepping up too-complicated model result drop before comple tion Some may feel Dart-Too sufficiently advanced AMA Cub has found building two three AMA Cubs model advances workmanship young modelers skill dexterity pro gresses understanding also increases model completed Like AMA Cub Dart-Too can used class room teaching fundamentals aerodynamics geometry mathematics also providing student satisfaction carrying project through comple tion pleasure flight continued page 46 July1975 43 DART-TOO Notes Construction structure 1/16 X 1/8-in balsa except motor stick cut 1/8 X 3/8 simplicity plan appears can used covering material simply removing two pages magazine taping gether underneath gluing appropriate wood sizes directly page within outlines indicated Dont worry about weight paperits light enough White glue diluted 50 percent water works well dilute glue coveringuse full strength undiluted balsa-to-balsa joints Very little glue needed adhere framework covering excess should wiped away before attaching balsa wood strips covering wing stabilizer cover ing will bottom case creates no problem vertical fin made right along fuselage other sur faces side covered lightness Pay special attention nose fuselage propeller thrust bearing positioned Cut off 1/16-in slice top shown glue directly below make step plan indicates done rubber motor will clear wing pin inserted aft wing serves rear hook anchor rubber motor After wing has completed before being bent provide dihedral glue wing bottom motor stick Place Delta-Too upside down build ing board workbench resting vertical fin fuselage nose pin wing tips down board bench provide proper amount dihedral Although landing gear neces sary ROG Rise-Off-Ground provides change normal hand launch offers realistic flight pattern landing gear may bent 032 music wire small wheels cut balsa cannabalized small model may use landing gear North Pacific Skeeter similar readyto-fly model An AMA Cub propeller assembly Sig Manufacturing Co 401 S Front St Montezuma Iowa 50171 perfect Dart-Too prop assembly ready-to-fly North Pacific Skeeter avail able hobby shops super markets drug stores etc AMA Cub Delta Dart flight instruc tions can used getting Dart-Too perform air model shows tendency stall under power see sketch simply bend thin part plastic propeller assembly underneath right looking down above model facing away will cause model fly circles rather stall cannot stall its circling stalls glide correct adding small amount clay nose directly over thrust bearing lighter covering magazine page can improve flight characteristics may achieved covering mag azine plan plastic wrap followed choice lightweight covering tissue onionskin etc building Delta-Too may trace plan lightweight covering turn over building Delta-Toos balsa struc ture glued underneath covering completed covering will top flying surfaces Alternatively may use drawing construction plan model may covered tissue offering first lesson covering open structure model Use heaviest balsa wing lighter wood stabilizer vertical fin fuselage portion could either heavy lightweight balsa Stiff paper cardboard may sandwiched between two halves pilot cemented cockpit Dart-Too snapp low-wing second model ginner will enjoy building flying Re member practice makes perfect youor youngster youre teachingmay want build several before tackling advanced rubber fuel powered craft 46 Model Aviation same unique amazingly simple procedures used make DartToo used popular Delta Dartframawork assembles over paper tQ attached mixture half white- t tk inin* ~4ik