Semi-Tube Slingshot by APing

Last crawled date: 3 years ago

UPDATE!
http://www.thingiverse.com/thing:1739306
Learn more about the story of the Semi-Tube Slingshot and its performance at www.slingshotforum.com. Search for 'aiping'!
Features
Oval fork cones allow to attach flat bands up to 9 cm wide
(my favorite 9 cm / 3,5 cm / 25 cm TBB, with an active band length of 24 cm and a draw of 130 cm the draw weight is about 11 kg ...o.k ..band life time is than max 30 shots, depending to the weight of the ammo ...but two bands can simply be made from one strip TBB 12,5 x 26 cm, just cut diagonal from the two opposite 9 cm marks and than equalize the ends to a symmetric trapeze). Detailed procedure you can find here:
http://slingshotforum.com/topic/50425-semi-tube-slingshot-pouchband-attachment/
Tests with multilayer TBB (blue&black) showed that single layer TBS/TBG should be no problem.

Steel ball dispenser up to 13 mm, prepared to glue in a magnetic disk diameter 10 mm / hight 5 mm (my favorite 9,5 steel, no or mild hand-slap)


Tactical flashlight holder diameter 14 mm (don't use a laser for aiming !!!)

Tilted fork to support a straight fist
Warning! This slingshot is only for experienced shooters, draw at least 5 times effective
band length. You need speed to let the ball exit before the semi-tubes expand and block the trajectory.
Use of this slingshot at your own risk, especially full butterfly! No bands longer than 28 cm, taper at least 2:1.
LEGAL&SECURITY: Only print and use this slingshot according to the legal regulations of your country. NEVER EVER shoot at humans, even not point and aim. ALWAYS use protective glasses. I strongly suggest a catch box made at least from 15 mm plywood, 20 cm dense plastic foam or 1 mm steel. Don't shoot at concrete or brick walls due to violent ricochets, which can seriously injure yourself or bystanders, of course damage windows, flat screens etc. Only shoot as far as you are able to see, aim AND hit your target.
Band attachment: Bands should be at least 5 cm wide at the fork, wrap symmetrically from the upper oval tip, wider bands up to 9 cm until it touches the inner fork than utilize the outer fork . The flat-band should overlap the groove about 5 mm. To fix the flat band I use small office rubber which fits on the loop of my index finger/thumb, Don't cut the loop open. Wrap with strong force, so that office rubber color becomes pale, just before rupture. The bands don't snap off because the oval groove ensures an equal force distribution of the band fixing rubber and the fork cone also supports grip.
Slingshot orientation: Ball dispenser AWAY from your body, touching the inner index finger. The flat bands are directed from the grove to the end of the fork cones. This version is for hold left and draw right handed.