FL1 Experimental
A logbook for experimental aircraft buildersDOC-FL1-001 · REV 1.0 · BETA

Building
an airplane
is hard.
Logging it
shouldn't be.

A purpose-built builder's logbook for E-AB aircraft. One tap session starts. Voice notes capture the thinking. Photos auto-tag to build sections.

FIELD 05 / EARLY ACCESSREV 1.0 · 50 SEATS / BATCH
By submitting you join the beta queue. We notify in batches; no marketing.
N233LB · ACTIVE BUILD
Active build
HRS85.6
SES39
BLDS1
STATUSLIVE
  • 001Sling TSi · Sling TSi2d ago
SYNC OKflightlevelone.io/builds
1Builders active
85Hours logged
39Sessions logged
1Active this week
SYSTEM
LIVE
SECTION 2
§02.01 · Why builders use FL1

Designed for the shop.
Not a spreadsheet.

2.1.1Session Capture

One-tap session logging

Start a session, then get building. The timer runs while you work. Finish when you're done — the app stays out of your way.

REF 2.1.1FAA 14 CFR § 21.193
2.1.2Voice Capture

Voice notes, hands-free

Dictate build notes while you're elbow-deep in the fuselage. Annotate photos after you snap them. Your record writes itself.

REF 2.1.2WHISPER · ON-DEVICE
2.1.3DAR Handoff

DAR-ready documentation

Every session is timestamped. Every photo is annotated. When your DAR asks for the build record, hand them an organized, complete record.

REF 2.1.3FAA-S-8000 · § 4
§02.03 · Distribution

One link.
Your whole build.

Generate a public build log and share it with your EAA chapter, DAR, or anyone following along. Photos, session timeline, hours logged — all in one place. Viewers don't need an account.

Get early accessSee live build logs →
PUBLIC BUILD LOGSling TSi · Sling TSi
LIVE
HOURS LOGGED85.6
SESSIONS39
LAST SESSION2d ago
flightlevelone.io/buildsLIVE
§03.01 · Active builds

See what others
are building.

Browse all 1 builds →
#AIRCRAFTBUILDERHOURSLAST
001Sling TSiN233LB · Sling TSiPeter B. — Richmond VA85.62d ago

APPROVED FOR · supported kit aircraft and any other E-AB build

Sling TSiSling 4Van's RV-7Van's RV-12Van's RV-14Zenith CH 750Kitfox Series 7BearhawkSonex