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.

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

Why Do New Jet Engines Produce White Smoke?

LEGO Technic Racing Wheel Setup for Driving Games

Lexus LX570 5.7‑liter V8 engine, delivering around 367–383 horsepower and permanent all‑wheel drive. #monster #drift #offroad #challenge #pitescape

Which Car Sounds Best? BMW M5 and More — Vote Below

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

spring-loaded inertia engine for a Lada — how we made it