Aerodynamic and Hydrodynamic Performance
design for Powerboats

TBDP/VBDP Version 9.0 - NOW RELEASED!

MAJOR UPDATE!

MOST FEATURE-FILLED UPDATE IN OUR HISTORY

• NEW ANALYSIS FEATURE - VARIABLE DEADRISE - options for both Variable Longitudinal (warped plane) deadrise and Variable Lateral (progressive) deadrise, discrete lengthwise lift/drag contributions (not estimated).

• NEW ANALYSIS FEATURE - LATERAL DYNAMIC STABILITY Analysis - Predicts onset of chine-walk, track-rolling, hook, roll-over; 'Dynamic Stability Index' (DSI) evaluates combined effects of 'dynamic roll damping' and 'roll stiffness'; Examined through full velocity range.  'Lateral Stability' shown in Perf Results and Perf Graphs.

• NEW ANALYSIS FEATURE - LONGITUDINALL DYNAMIC STABILITY Analysis; - Predicts onset of nose-dive (stuffing), bow-steer, bow-trip, bow-raise, high bow lift or blow-over. New 'Nondimensional Longitudinal Balance' indicator;examined through full velocity range

• NEW ANALYSIS FEATURE - FUEL CONSUMPTION monitor; derived from 'Brake Specific Fuel Consumption' (BFSC), 'Engine Fuel Consumption Map', %Power, Engine Load.

• NEW PERFORMANCE FEATURE - AVERAGE DEADRISE; ; TBDP/VBDP now calculates 'average effective deadrise' of wetted planing surfaces when dynamically changing complex variable deadrise contributing.

• NEW ENHANCED STABILITY ANALYSIS ENGINES for Porpoising, Lateral Stability, Longitudinal Stability; analyzes raw instability data through full velocity, 'EASY STABILITY RESULTS WIZARD' gives trend, break-out, onset of instability assessments; presents Detailed Results, 1-line stability assessment statement and Traffic Light icon indicator

• NEW OEM Motor Wizard UPDATE - Added NEW 2025 electric motors, including NEW Electric Outboards, ePropulsion, ACEL, Mercury, Torqeedo, Evoy, Elco, PureWatercraft, Vision Marine,Flux marine. Also ADDED 2025 Mercury Verado 350 and Verado 425 OB engine specs. Now 4295 total OEM motors in dB

• NEW wider screen format for 'Design Input' & 'Perf Output' screens

• ENHANCED UI for 'Performance Optimization' options - changed optimization choice to "Max Power" (was optimize "Angle") using 100% Power. Now 4 analysis choices including: Limiting Velocity, Max Power, Economy, Power analysis options; with Auto 1-2-3 Analysis Wizard.

• NEW performance optimization algorithm installed - performance improvement, even more accurate

• NEW Deadrise Wizard, to accommodate complex variable deadrise options

• ADDED to Report Wizard, bulleted paragraph formatting for easy reading.

• NEW FEATURE for 'Round Pontoon' designs - determine static pontoon submersion and static wetted sponson width, 'bWidth' [user request].

• CHANGED in 'Aerofoil AngleInc Wizard'; now user can change reference length when calculating aerofoil chord heights/angles [user request]

• CHANGED UI - Relocated Design input fields 'Wing Chord', 'Wing Thickness' (from scrn#1 to scrn#4 'Topside/Aerofoil')

• ADDED 4 NEW user <estimate> buttons. Revised 11 user <estimate> button calculations.

• UPDATED Quick Design Wizard, innovative auto-configuring for template designs aids user custom design.

• NEW FEATURE to BoatDesign screen, 'Auto-Description' creator for user design files.

• CHANGED input limits for nPassengers [user request]

• Updated on-line HELP file

• ADDED improved help messages when updating dB version

• Revised Data Export form

• Updated warnng msg in Report Wizard if user design results in trim angle = zero when user specified high Step(s) Angle

• Updated 'Boat Design' screen so sort option 'No Standard Designs' displays

• Updated user warning msg in Report Wizard for significant 'AeroLift' (%AeroLift)

• ADDED new automatic engine weight estmates for IO engine types

• ADDED new automatic IO outdrive weights

• Updated Design Input screen for 'changing units'

• ADDED new Outdrive options; 'Bravo 4S', 'OMC-Cobra'; 'IMCO SC', 'IMCO SCX', 'IMCO SCX4', now 66 in dB

• Added new warning msg in Report Wizard when 'Low Aero Lift' msg, and 'Pod width too big' msg

• Updated Tutorial Wizard

• Updated on-line HELP files

TBDP/VBDP Version 8.12

• NEW Feature for design/analysis of PONTOON BOAT designs, catamaran hull with 'Round Pontoon' sponsons. [User Request]

• NEW std design template 'Round Pontoon Boat' and 'Tri-Toon' hull, now 21 designs in dBase

• NEW Feature for lifting strakes on centerpods and vee pads, including performance effects of local strake wetting [User Request]

• NEW input option for aerodynamic surface ‘roughness’ and effects on aero Lift, aero Drag,  performance

• Added features of NEW research for determination of 'average effective deadrise' for complex planing surface shapes such as round-bottomed sponsons (pontoons).

• Updated calculations for aerodynamic lift, aero drag and aero CPressure (NEW aerofoil research)

• ADDED Steyr 2024 inboard engine specs, to Motors Wizard, now 4275 OEM engines in dBase

• ADDED to Report Wizard msg, provides estimate of total # pages of printed report

• ADDED NEW Performance Output data (now 690 total) and Performance Graphs (now 67 total) for 'Strakes Wet' and 'Pod Strakes Wet' showing changing '# of strakes wetted/unwetted' thru full velocity range. [User Request]

• ADDED new interactive ToolTips for all 'Mini Help' buttons

• Added NEW HELP buttons for Lift Strake design on centerpod. 

• Added NEW 'Estimate' buttons for 'pod strake location', 'pod strake width'.

• Added NEW Report msg's for recommendations re: cockpit size vs aero lift. width vs deckwidth.

• Updated on-line HELP file*

• NEW LwrUnit drive options, now 62 OEM drives in dB

• NEW multi-engine option for 'Five motors' (number of drives) to address market growth of multi-engine setups [User Request]

• ADDED Mercury Racing 150R/200R, Suziki 250AUN, McLaren/Honda M300 engine specs, now 4265 OEM engines in Motors Wizard dB

• NEW feature for 'Optimize = Power' analysis, auto-correct user-input trim angles in 'Trim Set Range' (Acceleration Model) if not a successful solution.

• UPDATED calculations for 'Motor Interference Drag' and optimized 'Multi-Engine spacing', new research

• IMPROVED 'What's Changed' reporting (user-changed input fields)

• IMPROVED Report Wizard msg for comparative analysis of 'Compared Designs'

• UPDATED Report Wizard msg for 'Steps Loading', more information

• UPDATED Report Wizard msg for 'Optimium Trim Angle', more information

• UPDATED on-line HELP file 

• NEW option for 'Trim Set Range' (Acceleration Model), user increase of all trim angle settings.

• NEW on-screen design pictures for step dimensions, more descriptive

• ADDED status note on Performance Graphs when Comparing 2/3 Designs

• ADDED mini-Help button for 'Sponson Type'

• ADDED Estimate button for 'CowlHeightRear' dimension

• MODIFIED cockpit drag calculations for 'streamlined' cockpit design cases

• CHANGED 'Design Screen' updating for 'Final Velocity' after 'Start Velocity' changed.

• IMPROVED Report Wizard 'What's Changed' msg

• ADDED checks for UltraWide monitor and Multi-monitor use

• UPDATED  user message checkbox function on startup 'screen resolution' & 'printer setup' checks and 'Optimizaton=Economy' message [checkbox to cancel future message show]

• ADDED NEW standard design template in QuickDesign, 'Flat Bottom Skiff'; now 20 designs total available [User Request]

• IMPROVED formatting for '%Power' axis in Performance Graphs (Power)

• IMPROVED 'What Changed' info for 'FinalVelocity', 'VelocityInc'

• UPDATED analysis of Lower Unit/Drive; with new research, including new calcs for 'MotorDrag', 'Torpedo Drag', 'Drive/Torpedo Angle', 'Resolved Thrust', 'Torpedo Lift', 'Torpedo induced drag'

• ADDED in Report Wizard, new warning msg when user-specified 'Strake Width' too small; new msg for '% Sponson/% Vee Surface Lift'; new msg to advise when 'AutoFixBlowover' invoked (WAngle) to preclude 'blowover'

• ADDED field labels auto-change if selected Drive Type 'Jet', 'Direct', 'Surface'

• ADDED 'Final Velocity' information to printed listing of Input values

• ADDED in Report wizard, new information reported for Porpoising Analysis

• ADDED feature option to auto-adjust engine spacing when changing number of motors

• CHANGED in Report wizard info reported for Power levels (Economy Analysis) changed to %PowerRequired

• UPDATED 'estimate' calc for 'AngleTorpedo' when drive type is 'direct drive'

• UPDATED to Save Headwind/Tailwind simulation in user design dBase

• UPDATED 'Direct Drive', default dimensions, field captions, design picture

TBDP/VBDP Version 8.11

• NEW Performance Analysis feature determines local Lift Strake lift/drag contributions based on each determined local 'wetted strake' conditions.

• UPDATED Motors Wizard dB to all 2024 OEM engines, including new Honda 350hp V8, Mercury Racing 'R Series' 500R/400R/250R/60R), Mercury Racing APEX Series (360/200/60), Mercury Verado 600hp/500hp V12, Verado 350hp/400hp V10; Yamaha XTO Offshore 450hp V8, OXE diesel outboards, Caudwell 300hp diesel, Cox 300hp diesel, Tohatsu, Suzuki, Honda, Yamaha, Yanmar, new jet drive outboards, more (now 4242+ OEM engine specs in dB)

• NEW feature applies 'estimate' values to Groups of inputs (eg: steps, cockpit, centerpod/pad, strakes, power eff'y factors, motor dimensions, trim tabs)

• NEW 'Whats Changed' Wizard feature on Performance Graphs shows design 'changes' for each of 2-3 compared designs

• ADDED 2 NEW cockpit design option 'Wheelhouse' & 'Bowrider' w/design info (now 16 cockpit style selections)

• ADDED 2 NEW standard design template 'RC Vee sterndrive' & 'Bowrider Vee sterndrive' (now 19 designs in QuickDesign dB) [User Request]

• ADDED 4 NEW LwrUnit/Drive selections, 'RC Sterndrive', 'Mercury R-Drive-Sport', 'Ilmor-OneDrive', 'Mercury OB SSM IV' (now 62 options in dB + manual user input)

• Revised 'Estimate' calcs for Podheight, Podwidth, Motorlength, LwrUnitLength, motor weight; Also revised for 'Strakewidth' now specific to tunnel or vee hulls. Added 'Estimate' button calcs for Trim Tab dimensions.

• NEW Performance Output data and Graphs showing '% Sponson/Vee Lift' of total Hydrodynamic Lift.

• Revised Propeller recommendations in Performance reporting to better reflect small prop sizes (eg RC boats)

• NEW Wizard Report msg advises performance of each lift strake through velocity range.

• Revised Wizard Report message for 'Low aero lift' w/Vee Hulls, more explicit

• Updated Wizard Tutorial feature

• Revised 10 Wizard screens to allow user to move windows

• Revised Wizard Report msg for 'What's Changed' shows data changes for each 'Design Compare' case.

• Revised Wizard Report msg to improve comments for  LwrUnit/Drive drag vs engine heights

• Updated on-line HELP file

• ADDED new feature to export aerofoil dimensions CSV file [User Request]
• NEW Design File 'Sort' to view 'tunnel hulls' or 'vee hulls' designs [User Request]
• Added OEM weights for 'OutdriveWeight' selections
• Revised user message for Windows DPI scaling and UHD screen resolution
• Revised Wizard Report notes, 'HeadWind' / 'TailWind' feature.
• Added check for default location of 'aero dimensions' dB w/auto recovery
• Added check for print Report to prevent orphaning lines

• NEW Aero Lift coefficient calculations based on new 2023 research re: influence of AR, T/C
• UPDATED 'Motors Wizard' dB; including new 'Honda 350hp V8', now 3695+ OEM engine specs in dB
• UPDATED Lower unit/drive design details dB, including 'Merc R-Drive' lower unit/drive design, now 58 drive specs in dB
• ADDED new cockpit option 'Canopy-Offshore', now 15 cockpit template options [User Request]
• Modified estimate button calc for 'MotorHeightCowl' (exposed engine cowling/fairing)
• Modified estimate button calc for 'VeeAeroThickness'
• Changed input variable behaviour for 'SponsonLength2'/'VeeLength2' based on active values
• Changed auto trigger for 'more decimals' setting (all user settings still available for all designs)
• Changed Propeller recommendation reporting in Performance reports to better reflect small prop sizes (eg RC boats)
• Improved error correction for user input fields if null values entered
• Updated on-line HELP file

• Added 'Mercury SM HD544' Lower unit/drive design details, now total 57 drive specs in dB.
• Added Performance Report Wizard msg for 'steps deadrise' if non-optimal
• Changed calculations for 'optimum step height/step angle' recommendation
• NEW Advanced analysis for Steps influenced by local variable deadrise in  step regions for more accurate local step loading.
• Updated viewed Performance Graphs for DCowlMotor, Steps, CLW conditions.
• Revised 'Maximum Practical Velocity' msg in Performance Report Wizard to enhance recommendations for all conditions.
• Updated on-line HELP file

• UPDATED 'Motors Wizard' db to include new Mercury Verado V10 5.7L 350hp, 400hp; Yamaha 450 V8 5.6L outboards, OXE diesel outboards (150hp-300hp), now 3693+ OEM engine specs included.
• Updated file date format in BoatDesign manager to allow sorting recently saved files by 'seconds' too.
• Added NEW Performance Output data and Graphs for Vee-Pad optimizing, showing % Pad/Pod Lift of total Lift.
• Added Performance Report Wizard msg to show all drag contributors to 'Cockpit Drag'.
• Added NEW standard design 'Fishing Vee with Cuddy Cabin', now 17 quick design templates [User Request]
• Enhanced Cockpit drag calculations for Center Console/Cuddy Cabin configurations, changed input fields
• Added Performance Report Wizard msg for Center Console/Cuddy Cabin cockpit configurations
• Added Performance Report Wizard msg to note if significant 'cockpit cavity drag'
• Updated Performance Report Wizard msg with advanced description of 'Vee-Pad Lift %' through operating velocity range, including recommendations for pod deadrise, pod height, pod width.
• Reorganized Performance output data screens listing and color-coding.
• Updated on-line HELP file

• UPDATED new 'Motors Wizard' database to 2022 engines, now with 3685+ OEM specifications

• Updated Wizard Tutorial screen images to latest versions

• Added new msg to Report Wizard to provide detailed explanation of Economy Analysis results

• Added new help button for 'LwrUnitLength'

• Added new menu option for 'How Fast does my boat go?'

• Added on Input screen, display label '100% Power' when Optimize=Angle analysis is selected; 'Min % Power' range when Optimize=Economy is selected.

• Updated printing msg for 'Print to PDF' OR 'Microsoft XPS Document' options

• Updated Report Wizard title msg to clarify Velocity Analysis for 'Test Velocity' or 'Max Velocity'

• Revised Report Wizard 'Trim Angle' msg to note when 'Max Trim Required' is NOT at Max Velocity in range.

• Updated Report Wizard msg for 'Wetted Surface', when fully wetted throughout entire velocity range

• Changed msg in Report Wizard for 'HUMP Transition' to prevent misleading 'WAngle' msg during low velocity conditions.

• Updated 'Estimate' calcs for 'Aerofoil type', 'SponsonLength/VeeWetLength', and 'Wing Chord'.

• Updated ToolTip for 'StrakeLocation'

• Updated '% Power' graph (Optimize=Economy) scale min/max values

TBDP/VBDP Version 8.10 NOW RELEASED!

• BIG NEW FEATURE Economy Performance Analysis Optimize Option='Economy'; Optimizes for Lowest 'Power' and Lowest 'Trim Angle' at each velocity through range. (user request) [see video ]

• Added 2 NEW standard designs 'Skater 24 Outboard' & 'Vee Hull Utility Bay', now 16 Std Designs to choose [User Request]

• Revised validation check for 'Step Lengths', minimum step angle

• Refined calc's for est'd 'Step' dimensions, est'd Engine Spacing (for multi-engine), est'd centerpod/pad dimensions, est'd Strakes dimensions in 'QuickDesign Wizard'

• Added Performance Graphs for 'Optimize=Economy' mode

• Revised Performance Graphs to show 'Max Power' baseline (Optimize 'Economy' & 'Power' modes)

• Improved Performance Graph (Power) to show '% Power' used (Optimize 'Economy' & 'Power' modes)

• Added NEW Report Wizard performance message for 'Accuracy' setting; for high 'Wetted Surfaces'; for 'Short Step' Length(s)

• Changed 'Auto 1-2-3' event sequence to prevent defaulted re-set of user-setting 'MinSponsonWetLength'/'MinVeeWetLength' (user request)

• Added NEW input variable 'PMinEconomy' for user-set minimum Power setting (used with 'Optimize=Economy')

• Revised calculation for 'Static YCG' location

• Added 'Hull Type' notations to 'Standard Designs' in 'QuickDesign Wizard'

• Changed CalcPerform 'progress bar' and animation clip to show improved status

• Revised CalcPerform error message recommendations when no solution available.

• Updated 'Wizard Tutorial'

• Added user input validation to 'QuickDesign' Wizard

• Revised dB version (V8.10.0); previous dB versions will auto update all older design files

• Added NEW 'Direct Drive' (inboard engne) drive option

• Expanded Report Wizard messages for 'Step Design' re: 'Optimum Step Height'

• Added 'estimate' buttons for 'LWetSponsonMinimum'; 'Transmisison Effy'; 'Propeller Slip'; 'Hull Effy'

• Added NEW Report Wizard messages for 'Above-Chine Sprayrails', 'Below-Chine Sprayrails', 'Pod Sprayrails', Cockpit Selection vs Aero Lift

• Added design pictures for 'Variable Deadrise Fore'

• Updated Input Wizard forms design

• Added NEW Report Wizard messages for 'Wetted Surface' when vee/sponson surfaces become 'unwetted'; and when veepad/centerpod becomes 'unwetted'

• Added Windows 11 detection

• Improved error handling for 'Microsoft Print to PDF' processing

• Improved Report Wizard performance message for Tunnel Hull with Center Pod

• Updated auto calc of CenterPod/VeePad angle and height; added data validation

• Added design picture for VeePad angle dimensions

• Updated HELP file/manual

• Revised user data Validation messaging methods for high DPI, faster screen refresh

• Automatically UPDATES all older dBase design file records.

• NEW input feature to auto set calculate 'MAX VELOCITY' or 'TEST VELOCITY'

• NEW design file 'Sort' to view only 'non-standard' designs

• NEW standard design 'RIB Vee',now 15 std designs to choose in Design Wizard

• User input validation for all hull 'deadrise' inputs

• UPDATED Motor Wizard to all NEW 2021 motors, now 3430+ OEM engine specifications, including NEW Mercury 600hp V12 Verado, Mercury Racing 360 APX Racing outboards, more

• NEW Performance Output data Results and Graphs for Steps Load Distribution for each step surface

• NEW feature for user input width for 'Center Console'; expanded aerodynamic calculations for 'Center Console' cockpit drag

• Improved 'estimate' calc for 'WidthRearFairing' when multiple engines

• Corrected calc for 'estimate' for 'motor weight' if Metric

• Added NEW 'estimate' button for 'CowlHeightFront', 'PodDeadrise', 'Vee Pad Width'

• Added auto close of TBDP/VBDP previous instance running

• NEW performance Optimization (Power) Option in 'Accel Model' to automatically maximize acceleration

• Reformatted Wizard forms visual and DPI aware

• Modified Titlebar colors to reflect user defaults (Win10 version update)

• Updated Step Design descriptions reported in Wizard Performance Report

TBDP/VBDP Version 8.9 NOW RELEASED! 

• NEW fully automated design dB updating routine for all new dB version releases

• Added NEW expanded Performance Report narratives

• Updated Performance Results screen presentation

• Added updated aerodynamic lift & drag analysis for centerpod cases

• Added specs for Mercury Racing 360 APX F1 Racing outboard to 2020 Motor Wizard dB

• Added NEW Performance data and Graphs for 'XCGDiff', compares 'XCFDynam' vs 'XCGStat' resolved force locations, add'l measure of Dynamic Stability

• Added Refined Report Wizard messages for Steps design

• Added Enhanced Porpoising report message, determines when centerpod/pad design contributes to porpoising onset

• Added NEW feature routine to view PDF Sample Reports from TBDP/VBDP menu

• Updated SWet output for full-wet condition

• Updated LWetFore output for lower velocities

• Added Enhanced TrimTabs warning messages and Report Wizard narrative

• Added report reminder if user turns off 'Active Input Validation'

• Added to QuickConvert Wizard, 'Imp Gal to Litres to US Gal'

• Revised prgm 'Check Update' routine for higher software revision version labels

• Revised install check and user options for Regional Codes compatibility

• Added install check for Windows DPI setting and Virtualization

• Updated default screen font settings for familiarity to all Windows OS versions

• Fixed display issue with UHD/4K monitors; (Windows 32k limit)

• Revised installation checks for screen resolution and DPI settings, added user option 'Dont-show-me-this-again' for screen, DPI, printer settings

• NEW HELP file/manual 

• NEW UPDATED Motor Wizard dB, including 2020 engine specs, now 3200+ OEM engines

• NEW Design Feature for 'Delta'/triangular shaped vee-pad or tunnel center-pod option;

• NEW Design Feature for specifying spray rails on tunnel center-pod or Vee-Pad and performance results of spray drag.

• Modified xCPPod/xCPPad analysis for Dynamic Stability.

• Improved 'What's Changed' messages for Power/Propulsive efficiency details

• Upgraded CheckUpdates reader

• Added Help buttons for SponsonLength and LWetSponsonMinimum

• Updated 'ExportToCVS' to ensure both numbers and text values

• Improved Performance Results screen presentation management, cleanliness

• Added Estimate button for WINGCHORD dimension

• Added detail to Report Wizard header info

• Improved Report Wizard narrative for 'Maximum Practical Velocity' message

• NEW 'Center of Pressure' Performance Output data and Performance Graphs for sponson/vee and pod/pad planning surfaces

• Added analysis and reporting for Effective Wetted Lengths for Multiple Step surfaces, refined effects on Dynamic Stability

• Revised Trim Tab hydrodynamics, Lift/Moment calcs, Dynamic Stability calc, messages

• Added default value for Multiple Engine spacing if no user entry

• Updated Report Wizard header information

• Added picture button for tunnel or vee dimensions view

• Added Report Wizard caution messages for multiple step design angles

• Pictures now enlarge with animation expansion

• Added HELP section with tips on software setup for PWC/Watercraft (Jetski) analysis

• Expanded 'What's Changed' feature to compare design to last save version

• Expanded HELP file/manual

• NEW Enhanced Porpoise Analysis, new complex analysis accounts for affect of multiple stepped hulls, centerpod, vee-pad, on critical porpoising limit calcs.

• NEW Help 'Search' feature (work-around for existing MS bug).

• Added 'Mercury 50hp', 'Yamaha 50hp', 'Evinrude 50hp' Lower Unit design details, now total drive specs in built-in dB.

• Modified tab key movement to be compatible with latest Win10 OS.

• Changed update of displayed 'Max Velocity' on input screen, when units are converted.

• Added explanation to Input 'Data Validation' messages re: action options.

• Added auto-selection of Active Data Input Validation after design compile from 'Quick Design Wizard' to ensure all data is checked.

• Added test and error msg for 'Optimize = Velocity' option when user-specified WAngle is too small to generate valid balanced performance results, including optional auto-reset of WAngle.

• Fixed units conversion in DMotor calculation when metric units used

• New HELP files and manjual

TBDP/VBDP Version 8.8 NOW RELEASED! 

MAJOR UPDATE

• Completely new Performance Output screens, now 4 full pages of performance output, over 600 data points, improved readability, better grouping

• New updated Motor Wizard engine database, now includes + OEM specs, including extreme 2019 Mercury Racing 450R V8, Mercury Racing's 400ROS, 300R & 250R, Mercury Verado 4.6L V8 engine line, Evinrude G2 300 V6, Yamaha XF425 V8, Seven Marine's mega 627 V8, Suzuki DF350A, and ALL the new 2019 OEM outboard and sterndrive engines.

• Added new enhanced 'Step Performance Analysis' and new Performance data showing 'Wetted Length' of each effective Step surface, including ‘unwetted’ stages.

• Added new Performance output data for 'Effective Planning Surface Width' (bWidth) for sponsons, vee, centerpod, veepad.

• Added new 'Lower Unit Interference' drag analysis for multiengine installations; shown in to Wizard Performance Reports.

• Added new Performance output results and graph for 'Distance Travelled' ['Acceleration Analysis']

• Added new analysis for centered locations (CofPressure) for all Lift forces acting, including Sponson/Vee, CenterPod/VeePad, Trimtabs; shown in Wizard Performance Reports

• Added new Lower Unit analysis and info re: Torpedo Resolved Lift and Induced Drag when engine incremental trim angle is specified

• Added new output data graphs in Performance Graphics presentation screens (now 57 graphs available)

• Added 'Merc M6 drive', 'Evinrude 2/3cyl', 'Seven Marine GT', 'Merc Verado L6', 'Volvo SX', 'Volvo IPS', 'Volvo DPS', 'Mercruiser Bravo 3X' lower unit design details, now total 59 drive specs in built-in dB.

• Added 10 more performance narrative subjects to Wizard Performance Report 'POWER' summary

• Added 'Propeller Sizing' summary to Wizard Performance Reports

• Added user feature to turn OFF Trimtabs (auto-retraction) at specified speed.

• Added feature switch to allow user to turn off Trimtab warning messages

• Added 'auto-estimate' button for 'motor/engine weight' if user manually enters HP (not reqd when using 'Motor Wizard' OEM specs; 'auto-estimate' button for set velocity for 'auto-retraction' of Trimtabs; 'auto-estimate' button for 'Multi-engine spacing'.

• Enhanced descriptions given in Wizard Performance Reports for Lower Unit Drag, including spray drag and multi-engine interference drag.

• Improved 'Quick Design Wizard' with more detailed auto-modifications for user designs based on standard designs

• Added new menu option to 'Save data' for 'Compare Designs' to main Perf Data screen (feature also still available from Performance Graphs screen). 

• Revised Validation (active input and file save validations) routines for improved data checking.

• Added color highlight to selected performance output screen results data

• New dbase 'tbdpdat5.mdb' format with more Performance Output variables

• Updated TBDP/VBDP data conversion program, automatically converts older data formats to new Ver8.8 db format

• Added Help Tutorial for 'How to Compare Performance of Design Modification' in online Help documents/manual

• Updated and expanded Help Wizard Tutorial with new sample screens and descriptions

• Revised Acceleration Analysis, more accurate integration algorithm, better results for acce'n/elapsed time

• Updated 'What Changed' feature to provide more info, for any Optimize method

• Updated input fields in 'Accel Model' wizard to highlight each field when changed by user.

• Updated illustrations for tunnel jet drive, vee jet drive

• Added User-defined input trim angle (TWAngle) values in printed Input data report

• updated Help documents

• Revised hydrodynamic planning 'bWidth' calculation for complex deadrise, improves CLW accuracy

• Added new Wizard Report for 'Lifting surfaces performance', including monitor of 'bWidth' wrt 'chine width'

• Updated algorithms for Aero Drag (aero profile drag, cockpit drag, cowlings drag)

• Added 'Design Compare' feature for Optimize = "Power" option, (including Time, Acceleration); compare design results for up to 3 different/modified designs

• Added Estimate/Help buttons for PowerEffy; inboard, outboard, jet drives, engine height

• Added notification in Wizard Reports for 'below planing velocity'

• Updated 'create desktop link' function (Win10)

• Updated design input for 'LwrUnitHeight' dimension for different hull styles, vee/pad/sponson/pod

• Expanded text output for 'MotorDescription' in export to CVS file

• Expanded Wizard Report notes for 'LwrUnitHeight' relative to effective running surfaces

• Updated Help documents with new features

• Added Estimate buttons for Wing Thickness, Vee AeroThickness, Tunnel Height/Vee Deck Height

• Added user "What's Changed" notification feature so user can see when engine selections have been changed

• Updated software install to accommodate recent changes in Win10 (build 1803)

• added 'SevenMarine' lower unit design details to dB

• added auto checking routine to prevent duplicate file name saving

• enhanced HTML Help on-line document

• NEW feature for user export of input/output data to CVS file format.

• NEW Optimum Trim Angle analysis

• Updated user screen/print font selection routines

• Updated Performance Graph formatting

• Expanded Performance Report

TBDP/VBDP Version 8.7 NOW RELEASED! 

"MAJOR UPDATE"

• NEW analysis for STEPS, with more user step design definition, more accurate performance prediction of functional wetted areas, force locations, Dynamic CG locations

• added Estimate/Help features for Step Height, Forward Step

• NEW dB format [tbdpdat4.mdb], updated TBDP_Convert program for all previous dB's

• Enhanced Report messaging for Step performance including design recommendations, step performance, wetted/non-wetted

• NEW sort feature for 'Standard Designs'

• NEW feature compares THREE designs in Performance Graphs

• Ehanced Reporting for 'Compare designs'

• Now user can account for tunnel hull 'aerofoil' location offset

• Enhanced HELP module

• enhanced Porpoise Regime reporting

• added Optimum Trim Angle reporting

• added step angle display on Input screen for multiple step inputs

• added Estimate/Help buttons for multiple Step inputs

• expanded step design reporting and recommendations, including optimum Step height reporting

• added reporting for LwrUnitHeight specified above waterline

• added input screen notation for 'gallons/litres of fuel' conversion from fuel weight (lbs/Kg)

• enhanced reporting for identification of 'Maximum Limiting Velocity' and 'Maximum Practical Velocity'

• added departure analysis for Dynamic Stability, and influence on Max Practical Velocity 

• Honda lower unit specs added

• added reporting of Lifting Strakes performance

• enhanced Dynamic Stability reporting

• improved reporting for 'Maximum Limiting Velocity'

• added JET drive options

• Fuel volume conversion for Fuel Weight input

• enhanced Step design recommendations

• enhanced Hump Transition reporting

• passenger appendage aero drag added

• enhanced auto Report wizard info/detail

• new graphics on input screens

• NEW standard design option for "Vee hull without Pad"

• NEW - Upgraded entire TBDP HELP system to MS HTMLHelp-now compatible with Win7/8/10 Help systems; full context-sensitive Help, one-click help buttons on every screen, content Help Search features.

• Variable deadrise, Notched Vee-Pad/Center-Pod features

• NEW added "WScreen w/RearCowl" option for cockpit design

• added engine/motor cowl height, width now automatically calculated

• UPDATED Motor Wizard; added Selva outboard and Cummins, Catepillar, MTU, Yanmar inboard engine specs

• revised lower unit drag calculation to include Leg drag if applicable

• Improved Report Wizard message for Porpoise susceptibility prediction

• Corrected error when using design Compare feature

• corrected issue when saving design file

• corrected fault in display of Sponson Drag % Report Wizard

• NEW screen layouts, NEW input variables, more performance analysis, output data/graphics, more reporting

• NEW 2016 Motor Wizard update, now with over 2250+ OEM engine choices, including new Evinrude G2, new Mercury Racing 400R, new Ilmore V8's, Jetdrive Outboards, Yamaha 350hp V8 Outboard, Evinrude V6 E-Tec's, New Mercury 350hp Sci Verado and Optimax ProXS engines and SevenMarine 557 outboard.

• NEW input variables and NEW 5 screen input format

• Animated 3D Chart display for Lift/Drag component contributions through Velocity range 

• NEW feature allows variable deadrise of sponsons or vee surfaces.

• NEW feature automatically optimizes trim angles for elapsed TIME and ACCELERATION analysis

• NEW feature to show extra decimal accuracy (useful for small hull designers and RC users)

• NEW automated analysis of 'Hump- Zone' transition velocity and 'Force Moment' dynamic stability, explains both in custom Performance Analysis Report.

• NEW input variables 'Air Temperature','Air Humidity' and 'Water Temperature' to allow user to account for environment variations

• NEW input variable 'Angle Torpedo', for when lower unit has relative trim angle (regardless of WAngle)

• NEW input variable 'Width Rear Fairing' to allow for unique aft fairing sizing

• Enhanced analysis adjusts lift/drag and coefficients for changes in air temperature, altitude, humidity, water temperature and water type (fresh/sea)

• NEW Performance Output data info; 'DCowl Motor' shows drag contribution of outboard engine cowling and 'Force Moment' information for dynamic stability analysis

• Printed reports to file or printer queue now show user unique file names

• Reduced Input module loading time and improved screen flash presentation with reduced flicker

• NEW database format adds more input variables, output info, reduced file maintenance

• Updated TBDP_Convert routine (Ver 2.1) automatically converts all design file data from all previous dB versions to new TBDP/VBDP V8.6 dB

• Improved auto screen resizing for all screen types/size/resolutions and printing.

• Updated to avoid Win7 UAC error msg that sometimes caused file save issue.

• Updated HELP files

• Enhanced Lift/Drag components display with animation

• NEW "Estimate" buttons can auto-input estmated input values if user does not have info

• NEW "WhatChanged" feature on Design Input screens that lists input fields 'changed' during session

• NEW new input variables for Motor Cowling sizing, Outdrive Weight, CockpitLength

• Revised aero drag for cockpit and cowling, increased accuracy of aero drag for outboard engine cowling

• NEW standard design options for 'Bass Boat with center console'

• NEW cockpit/cowling options "None with RearCowl" and "Center Console"

• NEW Wizard messages for auto design reports

• Improved data input validation checks

• Revised upper limit wetted surface values shown on output screen and Results graphs

• Added msg for vee-pad support lift, Corrected Lift Strake message error, Updated Porpoise calc

• Revised aero drag for Cuddy Cabin option, New Cockpit W/windscreen option

• Corrected DAero/CDAero algorthim

• NEW Lower/Drive Unit drag analysis, includes Torpedo drag, skeg drag, leg drag, induced drag and spray drags.

• Added mini-help buttons for each input frame

• Added LowerUnit specs for Ilmor Indy stern drive

• Enhanced Performance Wizard info for XCGDynamic, SprayFac, AeroDrag

• User requested scaling, units and decimal floating

• Improved Win7 installation cleanliness

Jan 2013

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Oct 2010

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Mar 2003