Gravity Engine – download Unity asset
Gravity Engine provides a complete toolkit for your space game physics.
– add stars, planets and spaceships that interact via gravitational N-body or “on-rails”
– design orbits by shape and see their paths in the editor and scene
– manual orbit changes with clickable handles
– orbit transfers/rendezvous from any orbit to any orbit
– rocket engines with staging
– model of Earth atmosphere
– solar system builder: add any object in the JPL database
– use real-world units (km/AU, kg)
– full support for particles
– highly accurate double-precision physics, with a choice of algorithm/Kepler evolution
– control of overall evolution speed, scale and CPU use
In-scene extensible command line console for development and debug
– change gravity to any force you design
No programming or math required.
Asset version: 6.1
All V6 engines—regardless of the V-angle between the cylinder banks—are subject to a primary imbalance caused by each bank consisting of an inline-three engine, due to the odd number of cylinders in each bank. Straight-six engines and flat-six engines do not experience this imbalance. To reduce the vibrations caused by this imbalance, most V6 engines use a harmonic damper on the crankshaft and/or a counter-rotating balance shaft.
Six-cylinder designs have less pulsation in the power delivery than four-cylinder engines, due to the overlap in the power strokes of the six-cylinder engine. In a four-cylinder engine, only one piston is on a power stroke at any given time. Each piston comes to a complete stop and reverses direction before the next one starts its power stroke, which results in a gap between power strokes, especially at lower engine speeds (RPM). In a six-cylinder engine with an even firing interval, the next piston starts its power stroke 60° before the previous one finishes, which results in smoother delivery of power to the flywheel.
Comparing engines on a dynamometer, a V6 engine shows instantaneous torque peaks of 154% above mean torque and valleys of 139% below mean torque, with a small amount of negative torque (engine torque reversals) between power strokes. In the case of a four-cylinder engine, the peaks are approximately 270% above mean torque and 210% below mean torque, with 100% negative torque being delivered between strokes. However, a V6 with uneven firing intervals of 90° and 150° shows large torque variations of 185% above and 172% below mean torque
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