I needed a special funnel to exchange the oil in the engine of my wood-splitter.
But the filling hole was not to reach with a standard funnel - so I made this one.
diameter (inner top) 80 mm
hight in total 100 mm
tail length about 50 mm
tailend diameter 14 mm
The filet on the tail is multifunctional: It´s a stiffener, a kind kind of support and it helps to let the air out while filling.