JHJon's Hangar
Plan · Build · Test · FlyReal Aircraft · Real Projects · Real Stories

Aircraft Bays

Start with the airplane.

Every project keeps its own identity, history, configuration and evidence. The specialist rooms can take you deep into structure, electronics, fabrication and testing — but the aircraft remains the center of the story.

Three aircraft · three different roles

The current hangar

L-4 Grasshopper presentation image
Flagship Restoration

1/3-Scale L-4 Grasshopper

A major restoration guided by one rule: preserve what is sound, document what exists, and rebuild only with cause. Structure, greenhouse, cockpit, modern systems and Normandy-period presentation remain clearly separated from unresolved historical identity.

Enter the L-4 Bay →
Balsa USA J-3 Cub presentation and reference image
Active Giant-Scale Build

1/4-Scale Balsa USA J-3 Cub

The build that keeps asking better questions: Cub character over speed, reliability over minimum weight, serviceability before covering, and enough authority for confident grass-field flying and ordinary sport-scale aerobatics.

Enter the J-3 Bay →
Jon's yellow and black Cleetus McFarland Carbon Cub S2 at the flying field
Return to RC

Carbon Cub S2

The 1.3 m aircraft that connects SAFE, simulator practice, factory telemetry and a return to flying with the larger systems questions that eventually shaped both giant-scale Cubs.

Enter the Carbon Cub Bay →
The bays are not parts catalogs. A manual can describe factory capability. A receipt can prove a purchase. A project record can establish a decision. Only aircraft-specific evidence can establish what is actually installed, tested or flown.

How the bays stay honest

Three layers of truth

Cover of the Balsa USA quarter-scale J-3 Cub laser-cut assembly manual
Manufacturer / Reference Truth

What the factory, manual, plan or authoritative reference says about the type, kit or component.

PLA dummy Continental engine prototype assembled for physical evaluation
Project Decision Truth

What was chosen, rejected, revised, left open or deliberately superseded for this aircraft.

Jon's Carbon Cub in its physical as-flown configuration at the field
Physical / As-Flown Truth

What the actual aircraft proves through photographs, measurements, installation, testing and flight records.

Across the hangar

One aircraft can open every room.

Woodworking and fabrication underway in Jon's workshop

Workshop

Structure, covering, hardware, repair methods, fixtures and service access.

Battery chargers, analyzer and test equipment on Jon's electronics bench

Electronics Bench

Receivers, power, servos, telemetry, wiring, testing and configuration control.

Printed cylinder banks for the L-4 dummy Continental engine prototype

3D Print Lab

Designs, prototypes, fit checks and finished printed parts.

Balsa USA J-3 Cub wing plan used as a technical reference

Plans Room

Manuals, drawings and the technical references behind each project.

Jon's Carbon Cub in operational field context

Flight Line

Release gates, ground testing, maiden preparation, telemetry review and as-flown records.