⚗️ Interactive Labs

Lab 1 · Otto efficiency vs compression ratio

η = 1 − 1/r^0.4. Feel why raising r has diminishing returns — and why knock caps it.

Compression ratio r:

8.0

η = 56.5% ·

Lab 2 · Mohr circle explorer

Enter a plane-stress state. The circle, principals and Tresca/von Mises equivalents draw themselves.

σx (MPa):

80

σy (MPa):

20

τxy (MPa):

40

Lab 3 · Beam deflection visualizer

Same beam (L = 4 m, EI = 10 MN·m²), three loadings. Deflection is drawn ×50 so you can see it.

Case: Simply supported + UDLCantilever + end loadSimply supported + mid load Load w or P (kN/m or kN):

10

Lab 4 · Pump affinity explorer

Speed ratio N/N₀. Flow follows N, head follows N², power follows N³ — small speed cuts save big power.

Speed ratio:

1.00

Lab 5 · Thin-cylinder safety explorer

Hoop = pd/2t must stay under allowable (200 MPa here). Push pressure or thin the wall and watch it fail.

Pressure p (MPa):

2.0

Diameter d (m):

1.0

Thickness t (mm):

10