Aerodynamic and Hydrodynamic Performance
design for Powerboats

AUTO 1-2-3 PERFORMANCE ANALYSIS

TBDP V8, "Auto 123 Performance Analysis video

QUICK DESIGN WIZARD

TBDP V8, "Quick Design Wizard video

LOWER UNIT DESIGN PERFORMANCE ANALYSIS

TBDP V8, "Lower Unit Design" Performance Analysis video

[Over + OEM engine specifications built-in with TBDP]

MOTOR WIZARD Demonstation video

MOTOR WIZARD demonstation video

Drive Unit Selection

[Calculates drag of any lower unit design]

Aerofoil Shapes

Sponson Type Selection

Now Released (latest  )
[Latest Updates] [Standard Features] [What's New in Ver 8 Summary]
"This is the Best TBDP©/VBDP© release ever!"

Accurate Prediction of Velocity; Dynamic Stability; Trim Angle; Accelleration & Elapsed Time; Power required, all components of Lifts, Drags, Coefficients; Porpoising; Step performance, Wetted Areas & Lengths; CG calculations; Centers of Pressure, propeller sizing and more.

Reports - comprehensive, complete Performance information through on-screen reports and printed reports with full velocity range predictive data and graphs, including unique 'intelligent' Performance Summary Wizard narrative with key observations and recommendations.

Flexible for use with ALL types and sizes of Tunnel and Vee hulls (see typical users)

How Fast Does My Boat Go? With fantastic accuracy, extensive flexibility for any hull design, for any size boat, any weight, any power, any configuration. TBDP©/VBDP© software for Performance Analysis makes it easy!

Performance Analysis Optimization - 4 options for Optimizing methods of performance analysis - get full performance data, data points, for chosen analysis methods: 1) Max Velocity or Test Velocity' 2) Trim Angles with Full Power, 3) Economy with Lowest Power & Lowest Trim Angle; 4) Power Required for specified Trim Angles.  Results through full operating velocity range. Quickly predict maximum speed and detailed hull performance characteristics; acceleration and Elapsed Time; optimize hull design and setup for your unique operating expectations;

Test hull modifications before modifying your boat; Design new hulls for optimum performance; Analyze performance characteristics in detail, including dynamic stability, all hydrodynamic and aerodynamic Lifts & Drags, HP requirements, Trim angles - even Porpoising analysis; Step design/performance, aerodynamic performance.

Easy Auto 1-2-3 Analysis for highly accurate performance prediction of your boat. [click here to see how it works] OR [VIDEO - click here for "Auto 123 Performance Analysis video]

Ten (10) Wizard Design Features; New Motor Selection Wizard; Miscellaneous Weight Wizard; Angle Increment Calculator; Quick Design Wizard; WAngle Calc Wizard; Deadrise Wizard; Power Calc Wizard; Velocity Calc Wizard; Propeller Wizard; Quick Lift Wizard, and Complete Wizard HELP Tutorial.

Performance Wizard provides a unique design-based summary of key performance characteristics, including highlighting of important performance & design features and setup situations that may benefit from consideration or correction. This is a unique Report for your design that can be over 3000+ words of performance wisdom! [click to see Performance Report sample]

Maximum Velocity Prediction; Accurate prediction of Maximum Limiting Velocity, Maximum Practical Velocity, Top Speed analysis, Planing Speed prediction, Dynamic Instability velocity region, custom velocity range analysis with trim angle prediction.

Porpoise Analysis - XPorpoise is an engineering tool developed by AR that helps predict your hull's inherent instabilities leading to porpoising. The technique is based on a uniquely modified Savitsky method of hydrodynamic prediction of the critical porpoise trim angle (CPA) for various hull/setup configurations and velocities.  Highly accurate for variable deadrise, multiple lifting surfaces, imbalanced surface loadings.  TBDP©VBDP© can predict when the hull is susceptible to porpoising and when it is performing in a stable regime.  Alternative design comparison helps optimize performance and minimize or eliminate porposing tendancies.  CLICK here to see more about Porpoise Analysis!

Step Design - including advanced analysis techniques that accurately calculate the performance effects of single or multiple steps in tunnel hulls or vee hulls, with Step design, analysis and performance reporting. Step design inputs include multiple step locations, step angles, step heights.  TBDP©/VBDP© provides a step analysis report for the full operating velocity range that includes the trim angle, dynamic stablity, functional wetted areas and changing wetted lengths for each step(s) section, Step Loading for each step surface - even highlighting the velocity at which each of your steps become fully 'unwetted' (or not).

Aerodynamic Performance - advanced analyiss of contributions of aero surfaces is very important, all aerodynamic Lift, Drag, Coefficient, L/D, Center of Pressure, effective surfaces area analyzed and reported.  Key relationships with all other hydrodynamic forces is analyzed to provide Dynamic Stabilty report for your specific hull. Aero Lift and Drag affects of ALL hull components including tunnel hull 'wing' shapes, deck surfaces, also cockpit configurations, cavity drag, cowlings, engine surfaces,  All based on years of research and practical testing.

Compare Design Modifications - are easy with the  the Graphic Performance presentation.  Automatically compare the performance trends of your 'new' design or 'trial modifications' to your 'base' design, with the Graphic Comparison mode.  Is the new design 'better'? Is it faster?  Is stability improved? It's easy to see now!  Makes it EXTRA EASY to see exactly how the design changes affect performance in all areas.   [click here for more details]

Lift and Drag distributions of all lift/drag components can be easily reviewed and analyzed by using the animated Chart view, showing values OR percentage (%) of each Lift (or Drag) component as they change throughout the full operating Velocity Range.

Hydrodynamic Lift/Drag Analysis  - Effective bWidth and wetted length of each planing surface have significant impacts on Lift and drag forces and locations for dynamic stability moments. Hydrodynamic Analysis includes effective planing width (bWidth) indicates the progression of planing phases as velocity and Lift increases.  Analysis must precisely account for bWidth to accurately represent local Lift forces, Lift center of pressure, friction and spray drag contributions.  Each lifting surface is acccurately analysed to show bWidth, wetted length, hydrodynamic lift, drag and dynamic stability moment contributions, as well as all coefficients, L/D ratios - And all this is presented for each velocity throughout the operating range.. 

Planing Width, Wetted Length Analysis - Effective bWidth, wetted length, wetted surface area of each individual planing surface, including sponson surfaces, vee surfaces, vee-pad, tunnel center-pod, multiple step surfaces. Detailed Hydrodynamic Analysis reporting.

Motor Design Wizard to easily specify the dimensional information for your setup.  Just select your OEM engine manufacturer and highlight your model from the over  listed.  The published manufacturers specifications (old and new) are all there - correct MaxHP, Height, Weight, RPM and gear ratio will be automatically input to TBDP.   Includes specs for Mercury, Merc Hi-Performance, OMC, BRP, Evinrude, Johnson, Yamaha, Suzuki, Nissan, Honda, Tohatsu, Mariner, MerCruiser, Volvo-Penta, Steyr and more!.  [Check out MORE about the AR Motor Design Wizard database!

Graphic Performance Results - Performance Results are presented in Graphic format, for easy review. All the key () performance indicators are shown on-screen in engineering graphic format using the GRAPH option. This powerful option allows you to see the trend of each performance indicator through the range of specified operating velocities; shows the changes of every Performance characteristic as the hull design simulation accelerates through the full velocity range. [Click here to view ALL of the on-screen Graphic Outputs]

Free Expert Performance Analysis Reports - show how you can apply expertise to your design/setup.  Full sample Reports of TBDP©/VBDP© performance analysis of typical hull designs - American Offshore AO3100, STV Euro19, Cougar 21MTR , Charger 16DL Vee-Pad and Prowler 246 boats - using TBDP© software with complete output data.  See some of the powerful analytical & reporting capabilities of TBDP©/VBDP© as used by Professional designers.

Propeller sizing is approximated based on your motor specifications and performance requirements. Engine RPM is predicted by TBDP/VBDP based on your design, setup parameters and operating performance; your predicted propeller pitch is calculated and displayed with recommendations. [click to see sample screen]

Quick Design Wizard makes it easy to obtain a generalized design by selecting one of the 'standard' performance tunnel hull and power catamaran design styles. The dimensional and setup design arrangements for your selected hull type will be automatically applied to all the design input fields. [click to see sample screen].  OR input your own design from a clean slate!

Drive Unit Wizard - Calculates hydrodynamic Drag of any lower unit design and includes standard design specs for  OEM drives and ability to calculate for ANY drive design - does all the calcs for 1, 2 or 3 drive configurations - and lot's more! [click here for more details]

Center-Pod and Vee-Pad Design - allows for detailed center-pod design (modified vee-tunnel design) or vee-pad design (vee hull) and comparative performance results. Delta shaped or rectangular pad, optimize pad height, length, attack angle. (3-sponson configuration with centerpod, even notched pod length option; OR vee hull with notched vee-pad option).

Power Efficiency calculation - allows for propeller efficiency, hull efficiency, transmission efficiency for overall power utilization for performance.

Elapsed Time maps and Acceleration curve graphics are now produced from the complex dynamic data that is generated by the TBDP/VBDP software. [click here for more details]

HELP system - full context-sensitive Help, one-click help buttons on every screen, HTML content Help Search features compatible with Win7/8/10 Help systems..TBDP/VBDP also includes a detailled  page User Manual  [click to see sample]

Imperial or Metric Units feature - automatic conversion of all input and output data with the click of a button. TBDP conforms to both Imperial (ft-lb-mph) units and Metric (m-kg-kph) units. A simple click on the menu 'Change Design Units' and the units on all screens automatically change from Imperial to metric - or from metric to Imperial. [see sample screen for control]

Variable Deadrise- inputs for variable deadrise sponsons or vee surfaces.

Aerofoil shape and configuration alternatives are available, with aerodynamic effects on performance; based on extensive research using NACA shape characteristics, thickness, aspect ratio, height above surface, with tunnel hull configurations and loadings. [click for Aerofoil design selection]

Environment and Climate Conditions - Enhanced analysis adjusts performance, lift/drag and coefficients for changes in air temperature, altitude, humidity, water temperature and water type (fresh/sea).

Weight Balance- static weight balance analysis accounts for user-input weights and locations for hull, engine, outdrive/lower unit, passengers, accessories.  Calculates gross weights and static CG location. [click to see sample screen]

Hump Zone Analysis - The 'Hump Zone' information provided for every design/setup can indicate a point of instability of interest to performance optimization.

Spray Rails and Lifting Strakes - analysis of Spray Rails and Lifting Strakes, based on Jim Russell's engineering design paper and published article. Includes Below-Chine Spray Rails (deflectors) for Whisker Spray reduction, and Above-Chine spray rails and effects on Sheer (friction) Spray Drag.

Automatic BlowOver check too much angle of attack (Wangle) can create a condition of greater lift than weight, causing blowover. A new feature will check for this condition, if you desire, and correct the WAngle during a Velocity Optimization performance check.

Whisker Spray - advanced hydrodynamics and Whisker Spray drag analysis gives highly accurate drag contributions to powerboat performance predictions & optimization. [click to see details]

Cavity Drag - Advanced aerodynamics and cavity drag analysis gives highly accurate cockpit/cowling drag contributions to powerboat performance. [click to see details]

Sponson Type - Asymmetrical and Symmetrical sponson designs available using TBDP Sponson Type selection feature.

Head Wind and Tail Wind Velocity simulations.

Trim Tabs - analysis of Trim Tabs, based on Jim Russell's engineering design paper and published article. Accounts for Trim Tab Width, Tab Length and Tab Deflection, auto retraction, safety messages.

Center of Pressure - Performance Output data and Graphs for Center Of Pressure of sponson/vee and pod/pad planning surfaces.

Color printing of  performance graphs!