This is a Delmag jumping jack. It was an old school method of compaction . How it works is that when the throttle is engaged, the diesel engine fires and unleashes a violent mechanical or explosive force that compresses and then releases the springs, launching the entire 60 to 100-kg machine into the air.

Do You Really Need an Oil Change? Honest Owner Experience

Corny on the bob and engines🥹✌️ #cornyonthebob #engines #viral #funny #fyp

The Raw V8 is unbeatable 🥶 #fyp #cars #london #viral | cars

Volvo PCV Sound Explained — Why Your Car Makes That Noise

FV1A KW-OHV 7cc engine driven thresher #enginediy @EngineDIY_team | mini engine

What’s in the Box? VW TDI Meets Turbo — Gas vs Diesel Tease

How to Fix Engine Car: Alivia Clark’s Quick Repair Tips

Simulated engine failure during training. Practicing scenarios like this builds the habits and decision-making skills needed to respond methodically under pressure. In aviation, preparation matters long before an emergency ever happens. The student in this case reacted well given he is a newer student. #aviation #flighttraining #emergencyprocedures #studentpilot #cfi