Description

Core is Baltic Birtch Ply – 0.375”

Sheets are cut into desired fin profile

Both sides are then laminated with either Carbon or fiberglass cloth.

Minimum of two layers on both sides with alternating fiber orientation.

Recommended: Use vacuum bagging for lamination process.

Baltic Birch is a high-quality, multi-ply hardwood plywood from Eastern Europe known for its exceptional strength, stability, and void-free core, made from thin, solid birch veneers.

Strength Notes

The resultant laminate will be strong – since the BBPC is a ‘strong’ material and can be made stronger with additional fiber layers.

Using vacuum bagging will ensure that all excess epoxy is drawn out – to further improve the strength to weight ratio.

Advantages

Relatively cheap – the cost will be in the lamination process especially if vacuum bagging will be used – since there is additional cost in the equipment and consumables.

Easy to manufacture.

Material Advantages

• Strength & Stability: More dimensionally stable and durable than typical plywood.
• Clean Edges: Multi-ply edge looks good and supports precise milling.
• Smooth Finish: Sandable surface takes paint and stain beautifully.
• No Voids: Solid core prevents glue starvation and ensures strong joints.

Disadvantages

Forming the fins to an exact aerodynamic profile is ‘nearly’ impossible

Limited ‘bevels’ can be cut using a table saw – but it is a dangerous process that is prone to inconsistencies, especially at this scale/size.

Weight

See table above

Cost

See table above

Application

Suitable for all construction techniques