Hello Stuart,
Thanks for the reply.
I found out at the
http://www.osengines.com/engines/osmg1847.html
that the OS-46 VX-DF can be used for both tractors and pusher fans.
Also it seems that the VX-DF version have already little larger head than
VR-DF type engine had.
Now I am little confused, are the datas at the website above correct,
or is there any danger to destroy the engine with the pusher fan ?
Regards,
Kristijan