Ga naar registratie

Benefits at Work
header_login_header_asset

Calculator: Wrc-1992 Diagram

Whether you are restoring a period-correct Lancia, building a recce notebook for your next hillclimb, or simply fascinated by analog computing, the WRC-1992 diagram calculator is a testament to a lost art. Learn it. Use it. And the next time your GPS fails on a remote forest stage, you will know exactly what to do. Do you own an original WRC-1992 diagram card or a replica? Share your photos and restoration stories in the comments below. For more deep dives into vintage rally tech, subscribe to our newsletter.

During reconnaissance (recce), you drive the stage at road speed. You sketch a "linear diagram" – a horizontal line with vertical spikes for jumps, wavy lines for rhythm sections, and arcs for corners. wrc-1992 diagram calculator

Rotate the calculator’s inner wheel until your average speed (from recce) aligns with the stage distance. Read the "correction factor" opposite the hairpin’s angle. The calculator tells you if that hairpin will cost 2 seconds or 5 seconds compared to a straight line. Whether you are restoring a period-correct Lancia, building

Place the diagram calculator’s transparent grid over your sketch. Align the "zero" with the stage start. Identify three "critical points": a hairpin, a flat-out crest, and a water splash. And the next time your GPS fails on

Whether you are restoring a period-correct Lancia, building a recce notebook for your next hillclimb, or simply fascinated by analog computing, the WRC-1992 diagram calculator is a testament to a lost art. Learn it. Use it. And the next time your GPS fails on a remote forest stage, you will know exactly what to do. Do you own an original WRC-1992 diagram card or a replica? Share your photos and restoration stories in the comments below. For more deep dives into vintage rally tech, subscribe to our newsletter.

During reconnaissance (recce), you drive the stage at road speed. You sketch a "linear diagram" – a horizontal line with vertical spikes for jumps, wavy lines for rhythm sections, and arcs for corners.

Rotate the calculator’s inner wheel until your average speed (from recce) aligns with the stage distance. Read the "correction factor" opposite the hairpin’s angle. The calculator tells you if that hairpin will cost 2 seconds or 5 seconds compared to a straight line.

Place the diagram calculator’s transparent grid over your sketch. Align the "zero" with the stage start. Identify three "critical points": a hairpin, a flat-out crest, and a water splash.