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Spar Caps:

The Sonex uses a proprietary "T" extrusion for the caps of the main spar I-beam structure. Sonex Spar Caps are 6061-T6 aluminum extruded and CNC machined to final size and shape.

Precision-machined extruded Spar Caps.

Because the Sonex plans require a proprietary "T" extrusion for the construction of the main wing spar, all scratch builders must purchase spar caps from Sonex, Ltd. to build their aircraft. Click the "Order Now!!" button to place an order (you must be a valid Sonex plans holder to purchase parts).

You must be logged-in as a Sonex Aircraft plans owner to view this product category.

The Spar Caps must be shipped via LTL motor freight due to their large size.

Each spar cap set includes the parts below:

Sonex Spar Cap Set *
6061-T6 Aluminum Machined Extrusions
Part Number Description Qty/Kit
SNX-W09-01L Left Hand Upper Spar Cap 1
SNX-W09-01R Right Hand Upper Spar Cap 1
SNX-W09-02L Left Hand Lower Spar Cap 1
SNX-W09-02R Right Hand Lower Spar Cap 1

* Spar Caps not sold separately unless replacements are needed due to damage or installation errors. Each Sonex plans holder is entitled to purchase only 1 set of spar caps to ensure that only one aircraft is built per plan serial number.

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