From H. G. Wells's The Invisible Man:

 Quote:
On the village green an inclined strong, down which, clinging the while to a pulley-swing handle, one could be hurled violently against a sack at the other end, come in for considerable favour among the adolescent, as also did the swings and the cocoanut shies.

Chapter X. Mr. Marvel's Visit to Iping


Sounds like a flying fox ; but I can't find a single noun for strong; though:

 Quote:
Strong ORIGIN Old English, of Germanic origin; related to Dutch and German streng, also to string.