this reminded me of an article in the Journal of Archer Antiquaries of an small torsion (sinew) powered "assassins bow" not the usual balestrino-style but an tiny inswinger. The interesting thing is that its foldable , spanned by a screw jack and has to be "deployed" berfore operation. Not very fast to put into action but since these exist they must have at least somehow worked.But only five or six were ever accounted for and are in collection.
I dont remember where i saved it from, could even have been here or another place? If you already kow about it excuse the double post- its not good quality pics but thats all I have on my drive. here it is:
Pics are too large for readability reason so i give you direct link:
Page 1 : http://i.imgur.com/6fIwTVD.jpg
Page 2: http://i.imgur.com/C7IxFre.jpg
Page 3 : http://i.imgur.com/Nj9uPJa.jpg
not exactly copyable 1:1 to a wrist mounted version but has some interesting ideas. If you somehow rely on torsion , a foldable frame and rigid inswinger arms this would overcome the problematic of the bulkyness of a regular elastic prod for actual underarm storage.
Last edited by rolynd on Mon Aug 17, 2015 11:31 am; edited 1 time in total (Reason for editing : link fixed)