1. Tested on Forge server. If cable block gets exploded with any kind of explosion, a big propeller model gets spawned at the location of each player. This model is clippable-through and isn't used anywhere. Disappears after player's death, but appears at players location (but doesn't move with player) after reconnecting.
2. Radial engine ponderings are invisible

I can also reproduce the issue that Radial engine ponders cannot be rendered correctly.

Problem with propeller model was resolved with last update 0.9.1c, but thing with radial engine left.
Tested a lot more. Propeller bug appeared after exploding powered cable blocks with any explosives.