right, this is classical bolt security.
you see it on vintage airplanes and race car tech, like from the 20s.
this is 70s russian military, however... but, come on,
don't tell me cold war stuff from the US looks THAT much better;)
i've seen things that tell other stories.
but hey, the russians always did their very own crazy thingies.
to me, it makes them very interesting. (as long as i don't have to own one myself...)
i used to own a M72 flathead motorcycle, 750ccm boxer type engine.
it's at my father's shed now and he doesn't want to give it back to me... this one i'd like to get back, ok, but the rest... i don't know.
the construction might be 30s, but this engine is a
70s crate block for tank purposes.
you should see the tranny, it's enormous!
anyway, has anyone ever seen this type of construction on the pistons?
and i'd really like to see a photo of D5 engine ports, are they the same or was it changed here for some reason?