LANCAIR IV Model Guide
LANCAIR IV · Model Guide
Overview
LANCAIR IV is listed as a single-engine piston aircraft from Lancair. The inputs contain no LANCAIR IV performance, weight or speed data. The only document is a Lancair Legacy construction manual chapter on miscellaneous systems: pitot-static, ELT, Stormscope, transponder antenna and autopilot. Use it as a build-quality checklist, not a LANCAIR IV spec sheet.
- The sources give no LANCAIR IV specs, speeds or weights. Get them from the seller and the aircraft's own paperwork.
- The source is a Legacy manual. Pitot-static, ELT, Stormscope, transponder antenna and autopilot are optional items, not included with the kit.
- Check autopilot pitch servo geometry: the actuator arm must be vertical when the elevator is at zero degrees.
- Dual static ports are recommended, and the static line should be drained at its lowest point regularly.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Reference only, not for flight. Use the current approved manual for your aircraft. See terms, section 5.
Document
Source
Copy found at sprinkle.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Model Guide
- Year ·
- 2026
- File size ·
- 45 KB
- Copy found at ·
- sprinkle.com
Does this guide give LANCAIR IV speeds, range or weights?
No. The inputs hold no LANCAIR IV performance, speed, range or weight figures, and the registry data for LANCAIR IV is empty. Get those numbers from the seller and the aircraft's own documentation.
Which LANCAIR IV systems should a buyer inspect?
The only source covers miscellaneous systems from a Legacy manual. For a LANCAIR IV, check the pitot-static plumbing and static ports, ELT mounting, Stormscope antenna ground plane, transponder antenna and autopilot servo geometry.
Are the avionics in the source standard on a LANCAIR IV?
The source does not say. It lists pitot-static, ELT, Stormscope, transponder antenna and autopilot as optional items not included with the Legacy kit. Confirm what is fitted to any LANCAIR IV you consider.
What is the LANCAIR IV Model Guide?
The LANCAIR IV Model Guide is a model guide for the LANCAIR IV, dated 2026.
What year was the LANCAIR IV Model Guide published?
The LANCAIR IV Model Guide — the LANCAIR IV model guide on file — is dated 2026.
Common. More common than 69% of the aircraft models we track.
Most owners only have the POH. Here's the essential set for the LANCAIR IV.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
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In this document
Pitot-static system and static ports
The manual places each static port in the unidirectional carbon fiber, at the lower edge of the belt. It is 83 3/8" back from the firewall joggle and bonded with epoxy/flox. The line is angled slightly up so water drains out through the port, and a small hump in the line also stops water collecting. The airspeed pressure switch ports are labelled P and S. For the gear retract test it suggests setting the switch to 90 KIAS.
ELT, Stormscope and transponder antenna
The ARTEX ELT-200 is recommended. It goes under the right floorboard, as far right as possible, with an external antenna for best performance. The Stormscope antenna position must be found by skin mapping with the engine and avionics powered, and it needs at least 2' x 2' of copper mesh inside the fuselage as a ground plane. The transponder antenna sits on the belly pan. Kits from FB 148 have recessed joggles for it, and earlier kits need an alternative process.
Autopilot (Tru-Trak) installation
The roll servo installs under the pilot's seat and the pitch servo ties into the elevator pushrod. The neutral pitch pushrod measures 9-3/4" between bearing centers, and the roll pushrod measures 18-1/2" center to center. Pushrod holes act as witness holes: a thin wire should not enter them. Watch for binding between the roll pushrod and the center control tube; extra washers between the bearings are the suggested fix.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Safety notes
- Autopilot pitch servo: with the elevator at zero degrees the actuator arm must be vertical, or an over-center condition could lock up the system.
- Stormscope will not work if its antenna is placed incorrectly, so check that skin mapping was done on any installed unit.
- Drain the static system at its lowest point regularly; the manual suggests fitting a drain there.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Full document text
LANCAIR IV Model Guide LANCAIR IV is listed as a single-engine piston aircraft from Lancair. The inputs contain no LANCAIR IV performance, weight or speed data. The only document is a Lancair Legacy construction manual chapter on miscellaneous systems: pitot-static, ELT, Stormscope, transponder antenna and autopilot. Use it as a build-quality checklist, not a LANCAIR IV spec sheet. • The sources give no LANCAIR IV specs, speeds or weights. Get them from the seller and the aircraft's own paperwork. • The source is a Legacy manual. Pitot-static, ELT, Stormscope, transponder antenna and autopilot are optional items, not included with the kit. • Check autopilot pitch servo geometry: the actuator arm must be vertical when the elevator is at zero degrees. • Dual static ports are recommended, and the static line should be drained at its lowest point regularly. Pitot-static system and static ports The manual places each static port in the unidirectional carbon fiber, at the lower edge of the belt. It is 83 3/8" back from the firewall joggle and bonded with epoxy/flox. The line is angled slightly up so water drains out through the port, and a small hump in the line also stops water collecting. The airspeed pressure switch ports are labelled P and S. For the gear retract test it suggests setting the switch to 90 KIAS. ELT, Stormscope and transponder antenna The ARTEX ELT-200 is recommended. It goes under the right floorboard, as far right as possible, with an external antenna for best performance. The Stormscope antenna position must be found by skin mapping with the engine and avionics powered, and it needs at least 2' x 2' of copper mesh inside the fuselage as a ground plane. The transponder antenna sits on the belly pan. Kits from FB 148 have recessed joggles for it, and earlier kits need an alternative process. Autopilot (Tru-Trak) installation The roll servo installs under the pilot's seat and the pitch servo ties into the elevator pushrod. The neutral pitch pushrod measures 9-3/4" between bearing centers, and the roll pushrod measures 18-1/2" center to center. Pushrod holes act as witness holes: a thin wire should not enter them. Watch for binding between the roll pushrod and the center control tube; extra washers between the bearings are the suggested fix. Safety notes: • Autopilot pitch servo: with the elevator at zero degrees the actuator arm must be vertical, or an over-center condition could lock up the system. • Stormscope will not work if its antenna is placed incorrectly, so check that skin mapping was done on any installed unit. • Drain the static system at its lowest point regularly; the manual suggests fitting a drain there.