LNB Federal Corporation

Bellerophon 1.1.0

Evaluation Guide

Bellerophon Evaluation 1.1.0 · Evaluation Guide · LNB Federal Corporation · October 2026

1. Overview

Bellerophon is a flight test data platform developed by LNB Federal Corporation. It reads IRIG 106 Chapter 10 flight test recordings, converts recorded measurements into engineering units using a parameter dictionary, and gives a test team one shared library in which to plot parameters on a common time axis, search every flight for test conditions, and find limit exceedances.

The Bellerophon Evaluation edition lets engineers and program staff see how Bellerophon works before requesting a license. It runs in a web browser, needs no installation or account, and comes with four synthetic demonstration flights already processed.

Bellerophon is available to government agencies and to companies, universities and other organizations. Use of this edition is governed by the Evaluation Terms.

In short: this edition shows the analysis workflow on sample data. It cannot open your own recordings. To evaluate Bellerophon on your program's data, request a pilot of Bellerophon Enterprise (section 10).

2. Evaluation and Enterprise Compared

CapabilityEvaluation editionBellerophon Enterprise
Flight library, time history plots, ground trackYes, demonstration flightsYes, your recordings
Library-wide search and limit monitoringYesYes
Flight comparisonYesYes
Recorder inventory: 1553, PCM, ARINC 429, discretes, TMATSYes, for the demonstration flightsYes
Open your own Chapter 10 recordingsNoYes, up to 100 GB each by default (configurable), streamed to the server
Import your own parameter dictionariesNo (the demonstration dictionary can be viewed)Yes, from TMATS or CSV, with row-by-row validation
Derived (calculated) parametersNoYes
Analog, IENA and iNET-X data; PCM throughput modeNoYes
Data quality rating for every recordingNoYes
Test points with pass or fail criteriaNoYes
One-click post-flight reportNoYes, printable to PDF
Data access for MATLAB and PythonNoYes, CSV export and a read-only interface with a Python client
Sample resolutionReduced (see section 7)Full recorded rate
Multiple users, roles, audit log, sign-in bannerNoYes
Smart card (CAC/PIV) sign-in and FIPS modeNoYes
Where it runsYour web browserA server on your network, with no outside connections

3. Before You Start

  • Browser: a current version of Chrome, Edge, Firefox or Safari. Nothing is installed.
  • Notice: when the page opens, read the evaluation notice. Select I accept only if you are authorized to accept the terms for yourself or your organization and agree to the Evaluation Terms. If you select Decline, the software does not open.
  • Data: you do not need any data. The four demonstration flights load automatically. Do not type, paste or upload classified, controlled or program information into this page.

4. The Demonstration Flights

All demonstration data is synthetic. It was generated by LNB Federal to resemble a typical instrumented test aircraft and does not represent any real aircraft, program, test or flight.

SortieDateTest articleTest cardDurationLimit exceedances
FT-26112026-09-14TA-01Envelope expansion, Mach 0.60 to 0.95 at 30,000 ft38 minNone
FT-26122026-09-16TA-01Handling qualities, wind-up turns to 5 g at 15,000 ft32 minNormal load factor peaked at 5.2 g against a 5.0 g limit
FT-26132026-09-21TA-02Stall approaches, clean configuration at 20,000 ft30 minNone
FT-26142026-09-23TA-01Functional check flight after engine change35 minExhaust gas temperature peaked at 878 °C against an 850 °C limit; fan vibration peaked at 1.23 in/s against a 1.0 in/s limit

Instrumentation of the Demonstration Aircraft

Recorder channelData typeContent
3MIL-STD-1553Air data, inertial and propulsion messages from remote terminals 5, 6 and 7: altitude, airspeed, Mach, vertical speed, angle of attack, outside air temperature, attitude, heading, normal load factor, latitude and longitude, fan and core speed, exhaust gas temperature, fuel flow, fuel quantity, oil pressure. 10 samples per second.
4PCMEngine monitoring stream, 16 words per minor frame, 100 minor frames per second: fan and core vibration, hydraulic pressures A and B, and the subcommutated generator voltage and load (subframe ID in word 1).
5ARINC 429GPS altitude (label 076) and GPS ground speed (label 112).
6DiscreteWeight on wheels, landing gear down, master caution.

Monitoring limits in the demonstration dictionary: angle of attack above 18°, normal load factor above 5.0 g, exhaust gas temperature above 850 °C, and fan vibration above 1.0 in/s.

5. Guided Walkthrough

These five tasks show the main workflow in about ten minutes.

  1. Find the engine exceedances. On Flight Library, select FT-2614. Under Limit Exceedances, select the exhaust gas temperature event. The chart zooms to the event; the dashed red line is the 850 °C limit and the shaded band is the time above it.
  2. Read values at one instant. Add Fan speed N1 and Fuel flow from the parameter list. Hover over the chart: the readout shows every plotted value at the cursor, in IRIG time and elapsed time.
  3. Search the whole library. Open Search & Limits and run the quick search Load factor above 4 g. Bellerophon searches all four flights and returns the two wind-up turns in FT-2612 that held above 4 g for at least one second. Select a result to open the flight at that moment.
  4. Compare flights. Open Compare, choose Exhaust gas temperature, and select FT-2611 and FT-2614. The overlay shows FT-2614, flown after the engine change, peaking at 878 °C, above the 850 °C limit, while FT-2611 stays below 815 °C. The table gives minimum, maximum and mean for each flight.
  5. See where the data comes from. Return to Flight Detail and scroll to the recorder inventory. The 1553 table lists each remote terminal and subaddress with its message rate; the PCM table shows the frame format and sync errors; the TMATS record is shown in full. Open Dictionaries to see how each parameter is mapped and scaled.

6. Reading the Displays

Time History

Each parameter is drawn in its own lane on a shared time axis. Drag across the chart to zoom; double-click or select Reset zoom to return to the full flight. When a lane covers more samples than the chart has pixels, Bellerophon draws the minimum and maximum of the samples under each pixel column, so short spikes stay visible.

Time

Absolute time is shown in IRIG format DDD:HH:MM:SS.sss, where DDD is the day of the year. Elapsed time counts from the start of the recording.

Search

Each condition tests whether a parameter is above or below a threshold. All conditions must be true at the same time for at least the minimum duration. The first condition reports its peak value within each matching interval.

Limits

Samples outside a limit that occur within 3 seconds of each other are reported as one exceedance, with its start, duration and peak.

7. Data Resolution in This Edition

To keep the page small, the demonstration flights are stored at reduced resolution. Bellerophon Enterprise always works at the full recorded rate.

  • Each parameter is stored as the minimum and maximum of every 0.4-second interval, which gives 5 points per second and preserves peaks.
  • Values are stored with 16-bit precision over each parameter's range for that flight. For example, altitude is resolved to better than 1 ft.
  • The limit exceedances listed for each flight were computed from the full-rate data before reduction, so they match what Bellerophon Enterprise reports.
  • Searches in this edition run on the reduced data. Start and end times of search results can differ from a full-rate search by up to 0.4 seconds.

8. Data Handling and Security

  • The Evaluation edition contains only synthetic demonstration data and cannot open, import or upload files.
  • It sends nothing to LNB Federal. It uses no cookies, accounts or analytics.
  • Your acceptance of the evaluation notice is remembered in this browser (local storage) for 30 days, then requested again; declining clears it.
  • The page loads the Lato and IBM Plex Mono fonts from Google Fonts. Google receives your network address when the fonts load, under Google's own privacy terms.
  • The website that hosts the Evaluation edition has its own privacy statement.
Not for operational use: the Evaluation edition is for assessment only. Do not use it, or anything it displays, for flight safety, airworthiness, certification or mission decisions.

9. Glossary

ARINC 429
An avionics data bus. Each 32-bit word carries an 8-bit label, written in octal, that identifies the data.
Chapter 10
IRIG 106 Chapter 10, the Range Commanders Council standard for digital flight data recorders.
Dictionary
The table that tells Bellerophon where each parameter is in the recording and how to convert it to engineering units. Programs often call this a parameter list or an instrumentation database.
Engineering units
Physical units such as feet, knots or degrees Celsius, as opposed to raw counts.
Exceedance
A period during which a parameter is above its high limit or below its low limit.
IRIG time
Day of year, hours, minutes and seconds, from the recorder's time source.
MIL-STD-1553
A military command/response data bus. Remote terminals (RT) transmit (T) or receive (R) data words at subaddresses (SA).
PCM
Pulse code modulation telemetry: a serial stream of fixed-length words arranged in repeating minor frames.
Subcommutated parameter
A PCM parameter that appears in a given word position only in some minor frames, identified by the subframe ID (SFID) word.
TMATS
The setup record at the start of a Chapter 10 recording that describes its channels and formats.

10. Moving to Bellerophon Enterprise

To evaluate Bellerophon on your own data, LNB Federal offers a pilot of Bellerophon Enterprise installed on your customer's network. To prepare, have the following ready:

  • One or more representative Chapter 10 recordings from the program, handled under your customer's data rules.
  • The program's parameter list or instrumentation database, in any format. Bellerophon Enterprise can build a dictionary from the TMATS setup record in the recordings, and LNB Federal can help convert other formats.
  • A host that meets the requirements in the Bellerophon Enterprise documentation, and the point of contact for its authorization.

An overview of Bellerophon Enterprise is published at https://lnbfederal.com/bellerophon/docs/. The complete guide is delivered with the licensed software.