Dataplate Aircraft Records · AD Engine
IN PROGRESS EXPERIMENTAL · AMATEUR-BUILT TUBE & FABRIC

Kitfox Aircraft Series 7 STi

Kit #7S-0812 · Rotax 912iS Sport · Whirl Wind 74" two-blade GA
Registration PENDING · reservation N72KF (pending FAA)
Build totals
Hours on build918.0 / ~1 600.0 est
A&P credit hrs486.0 (supervised)
Entries204 · 58 signed
Photos1572
§ 01 — Phase plan

Progress at a glance

SERIES 7 STI, REV H · UPDATED 2025-10-22
100%
Fuselage weldment
84.0 h
100%
Tail surfaces
112.0 h
100%
Landing gear
46.0 h
100%
Wings
208.0 h
100%
Control surfaces
72.0 h
62%
Fabric covering
168.0 / ~270.0
0%
Paint
0.0 / ~140.0
22%
Firewall fwd
42.0 / ~180.0
18%
Avionics
32.0 / ~160.0
0%
Final assembly
0.0 / ~90.0

§ 02 — Build journal

Latest entries

2026-04-18 · FRI · 4.0 h logged

Shrank top skin on L wing — final tension pass

FABRIC COVERING A&P CREDIT · 4.0h PHOTOS · 9
Poly-Fiber process per Stits/PB manual. Ironed at 250°F edge-seam, 300°F field, then 350°F final shrink. Top skin came out drum-tight with no wrinkles around the pitot mast cut-out. Rib-lacing pattern marked for tomorrow. K. Vega witnessed iron temps and confirmed the L wing is ready for Poly-Brush next session.
KF_0418_L1.jpg
pre-shrink
KF_0418_L2.jpg
350°F final
KF_0418_L3.jpg
drum-tight
Supervising A&P signoff
K. Vega
Vega, Katherine · A&P/IA 3712408
sha256:a9f4 8c12 77e3
anchored: OTS 2026-04-18
2026-04-12 · SUN · 6.5 h logged

Glued fabric — fuselage sides + turtledeck

FABRIC COVERING A&P CREDIT · 6.5h PHOTOS · 14
Poly-Tak applied to tube edges with acid brush, fabric laid in sections per the manual's sequence (bottom, sides, top). Both sides came together without bubbles. Turtledeck fabric pulled over the empennage fairing and tacked; will cut and glue seams next session. Tubes were still showing some chromate from the epoxy-primer coat underneath — no pinholes, no corrosion.
Supervising A&P signoff
H. Chen
Chen, Hao · A&P 4508221
sha256:3c81 b0e7 5a42
anchored: OTS 2026-04-12
2026-04-05 · SUN · 3.0 h logged · DRAFT

Ordered Poly-Fiber materials for paint phase

FABRIC COVERING DRAFT — not yet signed

Ordered Poly-Brush (2 gal), Poly-Spray (2 gal), Aero-Thane topcoat (1 gal white + 1 qt Kitfox blue), and UV blocker. Will stage for next phase once the shrinking + rib-lacing on both wings is finished.