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The latest release is V5.114A (Build 1431.0).

Added the Chapman strut rear suspension.
Updated the strut instant centre calculations.

[ More details here..... ]

V5.112

Updated the bump steer calculation for struts.
Added additional validation when using shock lengths to limit wheel travel.
Extended the Jacobs ladder to allow for multiple birdcage holes and unequal length sides.
If the torsion bar calculation fails, then show the position of the torsion bar with a dash line.

[ More details here..... ]

V5.110

Updated the CMM tool and added a caster rotation input.
Added an option to allow metric dimensions to 3 decimal places and inch dimensions to 4 decimal places.
Updated the axis setting input to enable changing the axis sequence.
Updated all inputs that have tabs and highlighted the active tab.
Fixed the corrupted help file topics when using styles.

[ More details here..... ]

V5.108

Updated and corrected the anti-roll bar rate calculations.
Updated and extended the travel calculations when using shock lengths.
Corrected the front suspension caster calculation for virtual A-arms.
Updated to the latest Delphi 10.4.2 Sydney compiler.
Corrected the travel calculations when using shock lengths and bellcranks.
Corrected the CMM tool to update both LH and RH tyre radius if symmetrical.
Corrected the turning radius and turning circle calculations to allow for larger king pin offsets.

[ More details here..... ]

V5.106

Updated all the Excel interface tools.
Individual worksheet names can now be specified for front and rear, left and right.
Specified worksheet names are now read from, and saved back to, the workbook.
The Excel tools can now interface with VCalc and read and write the complete vehicle.
Added a workaround to support a 3-link live axle with a single bottom link (undocumented.
Corrected the spring seat dimension when specifying the spring free length.
Added the units to the rates section of the antirollbar input form.
When using inch dimensions the ride height input showed 2 decimal places instead of 3. Fixed.
Corrected a rear suspension caster calculation error in the CMM tool.
The coil spring calculator tool didn't read all specified inputs. Fixed.
The coil spring calculator tool sometimes corrupted data when switching between Metric and Imperial units. Fixed.

[ More details here..... ]

V5.104

Added the bellcrank antirollbar for 4-link live axle.
Fixed the "Invalid variant type" and "Range check error" bug in Calc2Excel.
Included both input and calculated wheel alignment and instant centre data in the geometry results.
Added the driveshaft calculations in roll for deDion axles.
Corrected the anti-squat calculations for deDion axles.

[ More details here..... ]

V5.102

Revised the "trailing arm with upper and lower lateral links" wheel alignment and instant centre calculation for improved accuracy and performance.
Updated to the latest Delphi 10.4.1 Sydney compiler.
Added a lower link shock absorber to the  "trailing arm with upper and lower lateral links".

[ More details here..... ]

V5.100

SusProg3D now available in 64-bit version.
Added support for dynamic tyre radius and contact patch centroid offset.
Added a stop ring for primary and secondary coil springs.
Excel input and output now include all four ride heights and reference points.
Excel output now allows for specifying separate bump and droop, roll and turn sections.

[ More details here..... ]

V4.670

Fixed a bug that sometimes prevented antirollbar data loading correctly.
Portal axles added.
Added an axis indicator to the bottom left corner of the graphic.
If using a dual rate spring, and the tender spring rate is zero, raise an error message instead of causing a "Floating point division by zero" error.

[ More details here..... ]

V4.664

Added the Volkswagen Beetle twin trailing link suspension and steering.

[ More details here..... ]

V4.662

Fixed a bug that sometimes caused live axle links to be deleted in error.
Added a lever arm style shockabsorber.
Added a live axle mounted rack and pinion steering.
Added additional bellcrank items for Input2Excel and Excel2Input.

[ More details here..... ]

V4.661

Updated all calculations to ensure that all pre-requisite calculations are called in the correct sequence.
When doing the Rates calculation, if the spring rate is set to "Frequency" the new spring rate isn't calculated. Fixed.
Fixed a bug in the spring, shock, arb suspension input form that displayed incorrect text.
Fixed a bug in the display control form that sometimes showed an incorrect wheel toe description.

[ More details here..... ]

V4.660

Extensive changes to the live axle calculations for performance.
Reduced the number of live axle calculation options.
Various bug fixes.

[ More details here..... ]

[ Release notes ]