olmod
07-30-2005, 07:38 AM
Here is way of constructing a T tail that does not demolish the fin in those rough landings:) the idea i incorporated into a slope soaring kit around 1970 and is produced by Tony Cincotta of Saturn hobbies called Mid 1 wich was a 2 chanel airobatic trainer. http://homepages.tig.com.au/~saturn/index.htm
The frame of the fin was edged with 1/8"x3/8" medium hard balsa then covered with 1/16 with the front edges potruding to form a chanel into wich a snake tube push rod was nestled.
an alloy U shaped was cut and shaped as per pix, at the front of this on top was drilled a small hole to take a small self tapping screw ,wich was screwed into the inner snake tube ,just below the end of this screw, the inner was kinked and worked back and forth to provide a hinge like movement,the actual main hinge through fin was bushed with a thin walled brass tube, the plywood apron was epoxied to the alluminum chanel.
the model in the pix is 15+years old and to save losing rubber bands i use the antenna wire and tie it through once and let the rest hang;)
I have never broken a fin with this arrangement and recomend it for others to try. cheers Lez.
The frame of the fin was edged with 1/8"x3/8" medium hard balsa then covered with 1/16 with the front edges potruding to form a chanel into wich a snake tube push rod was nestled.
an alloy U shaped was cut and shaped as per pix, at the front of this on top was drilled a small hole to take a small self tapping screw ,wich was screwed into the inner snake tube ,just below the end of this screw, the inner was kinked and worked back and forth to provide a hinge like movement,the actual main hinge through fin was bushed with a thin walled brass tube, the plywood apron was epoxied to the alluminum chanel.
the model in the pix is 15+years old and to save losing rubber bands i use the antenna wire and tie it through once and let the rest hang;)
I have never broken a fin with this arrangement and recomend it for others to try. cheers Lez.