KINEMATIC SWEPT-PATH • TAIL KICK-OUT • AASHTO WB-67 / SUPERLOAD

Wind Blade Swept-Path & Turning Radius Calculator

Model horizontal lane clearance envelopes, rear tip tail kick-out, inner off-tracking cut-in, and required dolly steering angles for 70-meter to 115-meter wind turbine blades through city junctions, highway ramps, and roundabouts.

01 Transport Combination & Curve Inputs

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GEOMETRIC ENVELOPE OUTPUTS FEASIBLE WITH STEERSMAN
Total Swept Corridor Width 12.4 m 40.7 ft lane width required
Tail Swing / Kick-Out (TK) 4.8 m 15.7 ft outside of curve
Inner Off-Tracking Cut-In 5.1 m 16.7 ft inside encroachment
Required Dolly Steer Angle 42.8° 17.2° reserve margin
Permit Class Mandated Superload Class III Police Escort Mandatory
Chord Arch Chordal Sagitta: 3.2 m (10.5 ft)
Minimum Right-of-Way Width: 14.8 m (48.6 ft including buffers)
Steersman Operating Mode: Proportional Joystick Wireless Manual
AASHTO Kinematic Swept Path • SAE J695 Standards DYNAMIC CALCULATION

Kinematic Principles: Rotor Blade Turning Mechanics

1. Off-Tracking with Steerable Trailing Dollies

Unlike rigid trailers where off-tracking increases quadratically with wheelbase length, active trailing steerable dollies pivot counter to the prime mover's turning circle. The trailing bogie wheels steer outward, pushing the blade tip along an optimized path. When properly steered, the inner off-tracking cut-in is reduced by up to 65% compared to fixed-axle trailers.

Off-Tracking (OT) ≈ R - √(R² - WB² × cos(α))

2. Rear Tail Kick-Out (Sweep Encroachment)

As the rear dolly steers to negotiate a curve, the significant blade overhang past the rear pivot acts as a lever arm, swinging outward in the opposite direction of the turn. This "tail kick" can encroach into opposing traffic lanes, sidewalks, traffic poles, and guardrails by 10 to 25 feet.

Tail Kick (TK) ≈ √(R² + OH² + 2×R×OH×sin(δ)) - R

Need Automated Route Swept-Path Modeling in Your TMS?

Exspeedite TMS automatically calculates swept envelopes, flags obstacle conflicts, coordinates state DOT police escorts, and synchronizes real-time dolly telemetry for wind turbine superloads.

View 100m Blade Transport Manual