More ideas from Balalis
Tactical hand signals.

149 Standard SWAT Hand Signals For Close Range Engagement (CRE) Operations- thank goodness I can finally learn this! So handy.

[GIF] Swiss lever escapement - GIF on Imgur

Discover & share this Interesting GIF with everyone you know. GIPHY is how you search, share, discover, and create GIFs.

Belt drive 4a - YouTube

Reversing rotation transmission between two coaxial shafts. Rotation transmission between two skew shafts (skew angle is 90 deg.

Double Differential Steering System on a MODELCAR - YouTube

Modeled in Siemens UG/NX Modeling and Motion Simulation packages. Gears generated with the gear tool, treads assembled by hand.

The Tusi-couple is a mathematical device in which a small circle rotates inside a larger circle twice the diameter of the smaller circle. Rotations of the circles cause a point on the circumference of the smaller circle to oscillate back and forth in linear motion along a diameter of the larger circle. The couple was first proposed by the 13th-century Persian astronomer and mathematician Nasir al-Din al-Tusi in his 1247 Tahrir al-Majisti.

The Tusi-couple is a mathematical device in which a small circle rotates inside…