At 22:31 16 April 2014, son_of_flubber wrote:

Has anyone tried and/or had any luck with a 'slow burn single use'
solid rocket in a glider? It would have the advantage of high
energy density, low drag and quick start. I suppose that it might
melt something important if it were were mounted on the fuselage.
What about a wing mount close to the root? I know this idea
sounds crazy, but a pop-up jet sustainer strikes me as only slightly
less outrageous.

Fritz von Opel in 1929.

www.youtube.com/watch?v=vsqg28y_s3s
Ed