On the road

Max wind

Big flat sides catch wind like a sail. Plug in length, height, and weight to see the gust range where things get dangerous.

Updates as you typeSame math as the original Megawatt tool

Your rig’s profile

Live
Rig

The sliders start on an example coach. Move them to your own length, height, and loaded weight.

40.0 ft
13.0 ft
30,000 lb
40 mph

Where tipping starts

Checking

At 65 mph

0mph gust

highway speed cuts the margin

Parked

0mph gust

broadside, wheels on the ground

Know before the gust

Midland emergency weather radio

NOAA alerts when there’s no cell signal. Linked from the original wind calculator.

Price is shown on Amazon. It is not stored on this site.

Check price on Amazon
How the math works

Tipping pressure is weight × half track ÷ (side area × center of pressure), with the center of pressure at half the height. Wind speed is √(pressure ÷ 0.003328). Moving speed multiplies by a dynamic factor per rig type (0.45 to 0.7). Bands are ±3%. Track widths, factors, and the constant are the ones the original Megawatt tool used.

Keep planning

Solar plannerRoof layout, three build tiers, parts listsFuel savingsRig, tanks, and speed in. Water weight and a labeled speed estimate out.Weight and payloadSticker weights and cargo in. Remaining payload out.State license lookupPick a state. License notes for each rig class out.