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The latest release is V5.142A (Build 1640.0).

Continued development of the TTrailingArm3Links geometry calculations.
Added the side view instant centre line from hub centre through IC point as some of the “anti” calculations use the line from hub centre and others use the line from wheel contact centre.
Updated the “Chassis mounts + trailing arm + wheel alignment” and make it consistent across both 2 & 3 link types.
Updated the Jaguar, HArm and Porsche928 geometry calculations when specifying swing axle lengths and instant centres.
Updated the upright/strut/trailing arm graphic and added a side view graphic and to correctly scale the contents and identify the king pin and strut axis regions.
Updated the Excel functions error reporting to better identify the cell range in error.
Updated the Excel export functions to export the file name and file version.

[ More details here..... ]

V5.132

GUI updated to support display scale settings 125% to 200%.
Corrected the live axle chassis and links input dialogs that defaulted all values to zero.
Corrected the coil spring input dialog to save the opposite side spring when symmetric.
Updated the Results and enabled selection (Ctrl-A) and copy (Ctrl-C) functionality.
Corrected the axis display to clearly show when the data file axis differed from the current settings.
Added a "Point to line" function to the Tools -> Misc to check if three points are co-linear.
Updated the CAD2Susprog tool to correctly show the item captions and defaulted all numeric inputs to use the number of decimal places setting.
Updated all the FileRead DLLs to link through the portal axle data.
Updated the CAD2Susprog tool to correctly show the spindle length.
Updated all the Geometry -> Upright and Geometry -> Strut inputs with updated captions, fixed the graphic display when using inch measurements, and deleted the input for the sprindle reference.
Corrected the suspension link calculations to correctly handle calculating the square root of a negative number rather than causing a calculation failure.

[ More details here..... ]

V5.132

Renamed the CMM utility to CAD2SusProg and added additional inputs and calculations.
Added a display option to orient the view along the steering gear axis.
Updated ECalc to preselect the appropriate calculations.
Corrected the results output for the bellcrank rotation angle.
Added to the wheel and tyre input to allow for individual mounting offset definitions.
Updated the display of trailing arm to draw a line representation.
Updated the display of trailing arm types that use an additional toe control link to draw the toe link.
Updated the trailing arm calculations to support the Kia Carnival rear suspension.
Updated the Mustang caster link calculations to support the 2020 Mustang Shelby GT500.

[ More details here..... ]

V5.130

Added the option to specify the steering turn angle using steering wheel rotation.
Fixed the setting brake and torque distribution bug.
Fixed the rear geometry wheel location and alignment bug.
Fixed the live axle roll centre calculation bug.
Fixed the antirollbar link length bug.
Fixed the display of invalid driveshaft and shockabsorber artifacts.
Fixed the input of the lateral link coordinates for trailing arm with lateral links.
Added the Pitman arm steering (go-kart style) for all A-arm and Strut suspensions.

[ More details here..... ]

V5.125

Added an extra Geometry Configuration option for all suspension and steering linkages.
Added the steering wheel rotation to the Excel exports for ToeOutInTurn data.
Updated About to identify Windows 11 Version 22H2.
Fixed a bug that sometimes caused an exception when reading the SusProg3D settings.
Fixed a heading text error in the toeout in turn results.
Fixed a bug that corrupted the Ford Twin I-Beam steering input.
Updated the struts to allow for the strut-knuckle pivot bolt to be either upper or lower.
Fixed a bug that caused a helper spring to have the wrong type of end style and coil count.
Updated drawing the helper spring to change the colour to red when solid.
Fixed a bug that incorrectly calculated the body spring seat dimension when calculating the spring for any option except "Calculated".
Added rectangular section springs and rearranged the coil spring input form.
Changed the sequence the various results data is collated.
Update the strut input form to better identify the strut-knuckle pivot and adjustment bolts.
Fixed the "Ancestor for ExcelApplication not found" bug.
Fixed the "ExcelApplication Access violation" bug.

[ More details here..... ]

V5.124

A new Excel group tab added.
Added new A-arm design and dimensioning functions.
Fixed a bug displaying large numbers (-1E6 > values > 1E6).
Added extra validation in the CMM tool for spindle coordinates.
Added extra validation for live axle link lengths.
Added the depiction of the track surface to the graphic.
Added alternative Excel range name prefix, 'SPG'.
Added a new live axle bellcrank anti-roll bar configuration.

[ More details here..... ]

V5.122

Updated the threaded calculations to use task manager.
Updated the calculation threads to pass errors back to the main thread.
Updated the Excel interface with additional error reporting.
Updated the registration interface with additional error reporting.

[ More details here..... ]

V5.120

Updated About to identify Windows 11.
All calculations now performed in a dedicated CPU thread.
Extended the caster calculation limit from 0.5R to 0.8R (28.6 degrees to 45.8 degrees).
Corrected a bug in eCalc and vCalc
Corrected the terminology in Dynamic Results from 'Roll couple distribution' to 'Roll stiffness distribution'
Corrected a compiler bug with Excel2Input and Excel2CMM
Fixed a bug in the trailing arm with lateral links geometry calculation.
Fixed a bug in the Delphi IDE that caused some dialogs to not open correctly.
Fixed a bug calculating caster with an upper A-arm and a lower "virtual" A-arm.

[ More details here..... ]

V5.118

Mumford links are now full asymmetric.
Watts links are now full asymmetric.
Updated the Upright, Strut, Trailing Arm and Axle input dialogs and updated the graphic.
Replaced the CHM format help file with eWriter help file.
Added a "Stacked" option to the Display Control.
Refactored the MonoWheel code to improve performance.
Added a Cascade option to better display all open inputs.
Added an option to view the bellcrank centred in the screen viewing along the bellcrank axis.
Fixed a few instances where the font size didn't scale correctly on hi dpi devices.
The preferred minimum OS is Windows 10 Creators Update Version 1703 Build 15063 Released March 2017

[ More details here..... ]

V5.114

Added the Chapman strut rear suspension.
Updated the strut instant centre calculations.
Fixed a corrupted steering gear input form data display when using styles.

[ 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..... ]

[ Release notes ]