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Woodworking Math

Tropical wood · Africa

Ilomba wood

Ilomba (Pycnanthus angolensis, family Myristicaceae) is a tropical timber from Africa. Air-dry, it weighs about 31 lb/ft³ (497 kg/m³). The figures are from the USDA Forest Products Laboratory's Tropical Timbers of the World, pp. 497–498.

Other names, by country: Gboyei (Sierra Leone, Liberia), Oualélé, Walele (Ivory Coast), Otie (Ghana), Akomu (Nigeria), Eteng (Cameroon), Lolako (Zaire), Pycnanthus (Great Britain).

Key numbers

Janka hardness, dry
Not printed
Air-dry density
31 lb/ft³ (497 kg/m³)
Basic specific gravity
0.40 oven-dry weight, green volume
As printed: “Basic specific gravity (ovendry weight/green volume) 0.40; air-dry density 31 pcf.”
Shrinkage, green to oven-dry
8.4% tangential
Radial 4.6%, volumetric 12.8%

One source: USDA Forest Products Laboratory, Tropical Timbers of the World (Chudnoff, 1979 edition), the only published source read for this wood

Strength

Bending strength is the modulus of rupture (MOR); stiffness is the modulus of elasticity (MOE); crushing strength is compression parallel to the grain. The sheet collects these from published tests: it prints one data set, each at the moisture content printed beside it, never restated as 12%.

MoistureBending strength (MOR)Stiffness (MOE)Crushing strength
12% MC10,400 psi (72 MPa)1.21 million psi (8.3 GPa)5,700 psi (39 MPa)

A dash means the sheet prints no value; none is filled in.

What the data sheet says

Color, grain and texture
Wood whitish, pinkish-brown, sometimes with yellowish markings, sapwood not clearly differentiated from heartwood. Texture medium to coarse; grain generally straight, no luster; freshly sawn material may have an unpleasant odor which disappears on drying.
Working properties
Saws easily and works well with hand and machine tools, excellent peeler, good gluing and nailing characteristics.
Durability
Wood is perishable and liable to termite attack, vulnerable to powder-post beetle attack. Logs require rapid extraction and conversion to avoid insect and fungal degrade.
Uses
A general-utility timber, furniture components, interior joinery, plywood.
Where it grows
Rain forests, transitional, and secondary formations of West Africa.

Quoted from Tropical Timbers of the World, pp. 497–498, a USDA Forest Products Laboratory work in the public domain.

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Sources

  1. USDA Forest Products Laboratory, Tropical Timbers of the World (Chudnoff, USDA Forest Products Laboratory, 1979 edition), read 2026-11-07.

How the tags work: How we source every number.