HeliAviator Labs Aviation & Simulation
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HeliAviator Labs LLC · Precision Engineering Aviation Fuel Converter v3.4.1 • Live on iOS & Google Play

Precision Software Engineered for Flight Deck & Performance

High-precision flight deck fuel conversions, symmetrical multi-tank planning, and lab-grade engine telemetry. Engineered for zero bloat, 100% offline flight reliability, zero subscriptions, and strict on-device privacy.

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Buy Once, Fly Forever Zero Subscriptions 100% Offline Flight-Tested Since 2012

Brand Evolution Notice (Heli-av8er → HeliAviator Labs LLC)

All applications previously published under the Heli-av8er developer account (including Aviation Fuel Converter, Hour Difference Calculator, and Date Difference Calculator) are being formally unified under HeliAviator Labs LLC. All active licenses, past purchases, and customer support remain fully supported with uninterrupted updates.

Live Fuel Calc Simulator
Jet A (6.70 lbs/gal)
US GAL
Gallons (US) 350.0
Gallons (Imp) 291.4
Pounds (Lbs) 2,345.0
Liters (Ltrs) 1,324.9
Kilograms (Kg) 1,063.7
Instant 5-way unit conversion across 5 global fuels as featured in Aviation Fuel Converter V3.4.1.
Software Portfolio

Engineered for Demanding Missions

Every application is developed with a strict focus on mission accuracy, high-contrast readability, and immediate responsiveness without network dependence.

🔥 COMING SOON • IN ACTIVE DEVELOPMENT Virtual Dynamometer 4-Stroke Thermodynamics Targeting iOS • Android • macOS

Pocket Engine Dyno

Empirical 4-Stroke Engine Simulation, Tuning Optimization & Virtual Dyno
COMING SOON // IN ACTIVE DEVELOPMENT Targeting iOS • Android • macOS

The Ultimate Handheld Dyno Cell is Almost Here

We are putting the final touches on Pocket Engine Dyno—calibrating our deterministic thermodynamic engine against real dyno pulls, valvetrain kinematics, and wave acoustic harmonics. Stop guessing cam cards and runner lengths. Start dyno testing directly on your device.

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True Cycle Thermodynamics IMEP, BMEP, and Chen-Flynn rubbing friction models—zero generic approximations.
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AutoSweep™ Target-RPM AI Set your target peak power RPM; AutoSweep optimizes cam timing and induction to center your powerband.
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14 Verified Crate Baselines Pre-calibrated against verified dyno sheets from classic small blocks to modern pushrod V8s, quad-cam 32V modulars, and superbikes.

A professional-grade, deterministic 4-stroke internal combustion engine simulation and virtual dynamometer. Built on rigorous thermodynamic cycles, empirical gas dynamics, valvetrain kinematics, and wave acoustic physics to model real-world flywheel horsepower and torque across the entire RPM powerband.

  • Thermodynamic Cycles: Computes IMEP, BMEP, and FMEP with SAE J1349, STD, and DIN 70020 weather corrections
  • AutoSweep™ Tuning: Multi-variable parameter sweeps with Gaussian Target-RPM Centering for custom powerbands
  • Valvetrain Kinematics: Reciprocating mass physics, spring rates, and rocker ratios with live Valve Float Limit RPM
  • Acoustic Wave Tuning: 2nd–4th Helmholtz intake harmonics, merge collector scavenging spikes, and MBT spark knock limits

AutoSweep™ Target-RPM Tuning Optimizer

Target a specific peak power RPM (e.g. 5,500 RPM for street torque or 8,500 RPM for track racing). AutoSweep tests single- and multi-variable camshaft, port velocity, and induction combinations to center your powerband precisely at your target RPM.

Short Block & Displacement Geometry

Bore, Stroke, Rod Length, Deck Clearance, Gasket Thickness, Chamber Volume, Piston Dome/Dish, with real-time Static & Dynamic Compression Ratio (DCR) and rod dwell angle readouts.

Rod Ratio: 1.40:1 to 2.10:1 Quench Clearance Math Dynamic CR (IVC Dependent) Cross-Section Cutaway
Cylinder Heads & Valvetrain Kinematics

2V Wedge, Hemi, 4V Pentroof, and CNC Race ports. Custom flow bench CFM entry @ 28" H2O, port Mach velocity choking, rocker ratios (1.40:1 to 1.85:1), and titanium vs steel valve mass.

Flow Bench CFM @ 28" H2O Port Air Velocity (Mach Choking) Titanium vs Stainless Valves High-Rate Beehive Springs (410 lb/in)
Camshaft Profiles & 360° Timing Wheel

Hydraulic Flat Tappet, Solid Flat Tappet, Hydraulic Roller, Solid Roller, and Direct OHC. Duration @ .050", Gross Lift, LSA, Intake Centerline, and interactive 360° timing degree wheel.

Duration @ .050" (180°–320°) Lobe Separation Angle (LSA) Valve Overlap Scavenge Interactive 360° Degree Wheel
Induction & Forced Induction Systems

Naturally Aspirated, Single Turbo, Twin Turbo (Parallel/Sequential), Compound Turbos (up to 90 PSI / 6.2 bar), Roots Superchargers, Twin-Screw, Centrifugal, and Nitrous Oxide (N2O).

Single & Twin Turbos Compound Turbos (90 PSI) Twin-Screw Superchargers Helmholtz Runner Wave Tuning
Exhaust Scavenging & Fuel Delivery

Carburetor (latent heat cooling), PFI, GDI (+1.2 octane cooling, +2.5% thermal efficiency), and Dual Injection. Header primaries, pyramidal merge collectors, and 87–116 Octane / E85 / Diesel.

Direct Injection (GDI) + PFI Pyramidal Merge Spike (+4%) 87–93 Pump, E85, M100, Diesel Spark MBT & Knock Limits
Get Launch Day Notification Dyno Support & FAQ ⚙️ Status: Final Pre-Launch Calibration
SIMULATION // 6.2L PUSHROD GEN-IV PERFORMANCE V8
PRE-RELEASE PREVIEW SAE J1349 STD
PEAK FLYWHEEL POWER 455 HP @ 5,500 RPM
PEAK CRANK TORQUE 442 LB-FT @ 4,400 RPM
VOLUMETRIC EFFICIENCY 97.2% PEAK VE
BRAKE MEAN EFF. PRESSURE 173.2 PSI BMEP
18-PARAM CSV LOGGING FLOAT: 6,800 RPM

Empirically Calibrated Against Real Engine Dyno Pulls

Validated against 11 real-world physical engine dyno benchmarks across pushrod, DOHC, hyper-sport, and diesel platforms within tight margins.

SAE J1349 Validated
Engine Architecture Calculated Dyno Peak Real Engine Dyno Pull Variance
Classic 350ci Small Block V8 344 HP @ 6,000 RPM 345 HP @ 5,400 RPM -0.3%
427ci Big Block SOHC Competition V8 655 HP @ 6,800 RPM 616 HP @ 7,000 RPM +6.3%
6.2L Pushrod Gen-IV Performance V8 455 HP @ 5,500 RPM 430 HP @ 5,900 RPM +5.9%
5.0L Quad-Cam 32V Dual-VVT Modular V8 506 HP @ 7,000 RPM 460 HP @ 7,000 RPM +9.9%
2.6L Twin-Turbo 24V DOHC Inline-6 328 HP @ 6,800 RPM 320 HP @ 6,800 RPM +2.5%
2.0L High-Rev DOHC VVL Inline-4 210 HP @ 7,300 RPM 220 HP @ 8,000 RPM -4.5%
4.0L Boxer-6 NA (9,000 RPM Track-Spec) 487 HP @ 7,900 RPM 502 HP @ 8,400 RPM -2.9%
1340cc Hyper-Sport 16V DOHC Motorcycle I4 190 HP @ 10,300 RPM 197 HP @ 9,500 RPM -3.7%
6.7L Commercial Turbo-Diesel Inline-6 375 HP @ 2,800 RPM 385 HP @ 2,800 RPM -2.6%
6.6L Heavy-Duty 32V Turbo-Diesel V8 417 HP @ 2,450 RPM 445 HP @ 2,800 RPM -6.2%
3.0L Common-Rail 24V Turbo-Diesel V6 279 HP @ 3,550 RPM 286 HP @ 3,750 RPM -2.4%
All engine architectures represent standardized crate configurations and empirical test cell logs categorized purely by engineering specifications. Physics equations derived from foundational literature: John B. Heywood (Internal Combustion Engine Fundamentals), David Vizard, Charles Fayette Taylor, Gordon P. Blair, and SAE International standards (SAE J1349).
Aviation Operations Suite

Specialized Pilot Logbook & Currency Tools

Reliable calculation utilities originally launched under the Heli-av8er banner, purpose-built to streamline FAA flight logging, duty-time tracking, and inspection compliance.

Hour Difference Calculator

Tailored for aviators who log Hobbs and Tachometer meter times. Features an ultra-fast time-picker wheel designed to prevent manual subtraction mistakes after a long cross-country flight.

  • Flight duration and engine time math in decimal tenths or HH:MM
  • Part 121 / Part 135 flight duty period (FDP) and rest calculations
  • Midnight-crossing flight leg support with single-tap entry
Legacy Heli-av8er Utility Support & Details

Date Difference Calculator

The original iOS utility accepted into the App Store in February 2012. Solves the complex calendar-month and day-counting requirements for FAA regulatory currencies.

  • Tracks FAA Class 1, 2, and 3 flight medical certificate expirations
  • Flight review (BFR) and instrument proficiency check (IPC) due dates
  • 100-hour, progressive, and annual aircraft inspection intervals
Legacy Heli-av8er Utility Support & Details
Customer Care & Support

HeliAviator Labs Support Center

Direct assistance, technical documentation, and answers to common operational questions for all HeliAviator Labs LLC and Heli-av8er software.

Official Support Channels

24–48 Hour Response SLA Guarantee
Primary Support Email support@heliaviatorlabs.com
Legacy Account Support support@heli-av8er.com

Submitting a Bug Report or Feature Request

  • App name and installed version (from Settings)
  • Device model (e.g. iPhone 16 Pro, iPad Air M2, Pixel 8 Pro, Galaxy Tab)
  • Operating system and version number (iOS, iPadOS, or Android)
  • Step-by-step description of the calculation or behavior
Aviation Fuel Converter (V3.4.1)
Aviation Fuel Converter is a single one-time purchase with zero recurring subscriptions. Once purchased on the Apple App Store, you own the app for life with all future feature updates and platform enhancements included at no additional charge. We respect aviators and refuse to charge $50–$200/year annual renewals for essential flight deck calculation utilities. No subscriptions, no ads, no user telemetry, and no account logins required.
Aviation fuels expand significantly under scorching midday ramp heat and contract during high-altitude cruise cold soaking (down to -50°C). Assuming standard room-temperature density (15°C / 59°F) can cause an aircraft to take off hundreds of pounds overweight or outside structural lateral CG limits. Version 3.4.1 incorporates certified ASTM D1250 thermal expansion formulas with independent dual-temperature controls for "Fuel in Tank" vs "Fuel To Be Added" (supporting °C and °F), delivering certified double-precision flight deck calculations.
Balancing fuel across Left/Right Mains, Tips, Aux, and Center tanks on multi-tank aircraft (such as multi-tank turboprops, business jets, helicopters, and light twins) is time-consuming and error-prone by hand. Version 3.4.1 introduces custom aircraft profiles and an automated symmetrical water-filling algorithm. Enter your current starting fuel per tank and target total uplift; the app sequences fuel distribution perfectly according to fill priorities, handles starting imbalances, and provides a one-tap clipboard export formatted for flight plans, dispatch releases, or maintenance logs.
Version 3.4.1 supports 5 global fuel types: Jet A / Jet A-1, 100LL AvGas, Sustainable Aviation Fuel (SAF), Mogas (Auto Gas), and TS-1 Kerosene, plus user-defined Custom Specific Gravity overrides. Conversions execute simultaneously across all 5 standard international aviation units: US Gallons, Imperial Gallons, Pounds (lbs), Liters, and Kilograms (kg). The flight deck UI is natively localized in 11 international aviation languages: English, Spanish, French, Portuguese, German, Japanese, Chinese, Arabic (with bidirectional RTL support), Russian, Italian, and Hindi.
No. All calculation algorithms, unit conversions, ASTM thermal formulas, and aircraft profile databases run 100% locally on your iPhone, iPad, or Android device. It operates without restrictions in airplane mode, at remote backcountry gravel strips, or on flight decks at FL450 without network access.
Yes! Aviation Fuel Converter is officially live and published on the Google Play Store with 100% mathematical and feature parity to the iOS version. It is natively engineered for Android phones, foldable devices (cover and inner unfolded displays), and 7-inch / 10-inch flight deck kneeboard tablets running Android 8.0 through Android 15+. Download Aviation Fuel Converter on Google Play.
Pocket Engine Dyno (Coming Soon)
Pocket Engine Dyno is nearing official release and undergoing final dynamometer cross-calibration against crate engine pulls and valvetrain harmonics. The simulation suite will launch first on iOS, iPadOS, and macOS, followed by Android. To receive an email notification the moment the app goes live on the App Store, contact our team at developer@heliaviatorlabs.com.
Unlike arcade simulators or simplified rules of thumb, Pocket Engine Dyno models the complete 4-stroke thermodynamic cycle across discrete RPM steps. It calculates Indicated Mean Effective Pressure (IMEP), mechanical friction loss (FMEP) via Chen-Flynn rubbing models, and Brake Mean Effective Pressure (BMEP). It couples cylinder head flow bench CFM @ 28" H2O, port Mach air velocity, dynamic compression, and valve overlap scavenging to compute exact flywheel horsepower and torque calibrated to SAE J1349, STD (STP), and DIN 70020 standards.
AutoSweep™ is an automated search and ranking engine that tests single- and multi-variable engine combinations (bore/stroke, rod ratio, cam duration, lift, LSA, intake runner length, boost pressure). Using Gaussian proximity weighting, if you set a target peak of 5,500 RPM for street torque or 8,500 RPM for track racing, AutoSweep evaluates and ranks configurations that peak specifically at your target RPM—rather than recommending an excessively large cam that peaks outside your usable powerband.
The valvetrain physics engine calculates the total oscillating reciprocating mass per valve (including valve head diameter, stem, locks, retainer, active spring mass, and rocker arm/pushrod inertia). It compares this dynamic inertia against your chosen spring package (such as OEM Single, Performance Dual 340 lb/in, or High-Rate Beehive 410 lb/in) and rocker ratio to display a live Valve Float Limit RPM. If revved past this ceiling, volumetric efficiency collapses realistically to model valve toss.
Yes. The induction suite supports Naturally Aspirated, Single Turbo, Twin Turbo (Parallel & Sequential), Compound Turbos up to 90 PSI (6.2 bar), Roots, Twin-Screw, and Centrifugal superchargers, plus Nitrous Oxide (N2O). The fuel module models mechanical carburetors (with charge cooling latent heat), Port Fuel Injection (PFI), and Gasoline Direct Injection (GDI with +1.2 knock octane cooling and +2.5% thermal efficiency) across 87–93 Pump Gas, 100–116 Race Gas, E85 Ethanol, M100 Methanol, and Diesel.
Aviation Logbook Suite & General
Yes. If an aircraft departs before 2400 UTC and lands after 0000 UTC, toggle the "+24h" or "Next Day" switch in the time picker, and the exact elapsed flight duration will be calculated accurately without negative time errors.
Founder Jay Ferguson incorporated HeliAviator Labs LLC as the formal entity for expanding the software catalog and future updates. All previous apps from Heli-av8er are transferring to the LLC with 100% feature parity, preserved App Store licenses, and ongoing maintenance.
No. App transfers on the Apple App Store preserve user purchase receipts automatically. Once transferred, existing owners can update and restore their apps without paying again.
About the Studio

Engineered by Pilots, for Demanding Environments

Founded by pilot and software developer Jay Ferguson (known in the aviation community as Heli-av8er), HeliAviator Labs LLC was built on a straightforward principle: operational software should be fast, completely reliable, and free from distractions.

Whether calculating emergency fuel reserves on a windy flight deck or verifying acceleration curves on a race track, our applications deliver mathematical precision with zero telemetry trackers, zero intrusive advertisements, and zero dependence on remote servers.

100% Offline Capable

Critical formulas run locally on your device without requiring cellular signal or Wi-Fi.

Zero Tracking Architecture

We do not track, collect, store, or sell any personal data or flight calculations.

High-Contrast Cockpit UI

Designed for glare resistance in direct sunlight and preserve night vision in dark cockpits.

Precision Aerospace Math

Accurate unit densities and sensor filters tested against certified aviation handbooks.