Close

General Aviation Aircraft Design, Second Edition, continues to be the engineer’s best source for answers to realistic aircraft design questions. The book has been expanded to provide design guidance for additional classes of aircraft, including seaplanes, biplanes, UAS, high-speed business jets, and electric airplanes. In addition to conventional powerplants, design guidance for battery systems, electric motors, and complete electric powertrains is offered. The second edition contains new chapters:

These new chapters offer multiple practical methods to simplify the estimation of stability derivatives and introduce hinge moments and basic control system design. Furthermore, all chapters have been reorganized and feature updated material with additional analysis methods. This edition also provides an introduction to design optimization using a wing optimization as an example for the beginner.

Written by an engineer with more than 25 years of design experience, professional engineers, aircraft designers, aerodynamicists, structural analysts, performance analysts, researchers, and aerospace engineering students will value the book as the classic go-to for aircraft design.

General Aviation Aircraft Design

QRcode

Applied Methods and Procedures

Yeke Kingdom May 2026

Today, Msiri remains a controversial but revered figure in Katanga. He is remembered as a unifier, a defender of African sovereignty, and a national hero who defied the European colonizer until his last breath. The ruins of Bunkeya are a pilgrimage site. The Yeke identity persists, a proud reminder of a short, fierce, and dazzling kingdom that, for a brief moment, sat at the center of the world’s most ruthless trade and held the key to its own destiny—until the guns of a more powerful empire brought its story to a bloody, dramatic end. The head of Msiri, taken by Stairs, was never returned. But his spirit, many believe, still walks the copper-rich hills of Katanga.

In the tumultuous mid-19th century, as European colonial powers began their "Scramble for Africa," a remarkable and ruthless state emerged in the heart of the continent, far from the coasts. This was the Yeke Kingdom, also known as the Garanganze Kingdom, a powerful, militarized empire built from scratch by a single, ambitious Nyamwezi trader, Msiri, who transformed himself from a merchant into a god-like king. For a brief, intense period from roughly 1856 to 1891, the Yeke Kingdom dominated the rich mineral lands of Katanga (in the southern Democratic Republic of Congo and northern Zambia), controlling the region's vast wealth in copper, ivory, and—most crucially—the secret of its legendary saltpeter deposits. Though it collapsed violently upon the arrival of Belgian colonialism, the Yeke Kingdom left an indelible mark on the political and ethnic landscape of Central Africa, its story a powerful testament to both indigenous state-building and the violent pressures of the 19th-century global economy. Origins: The Nyamwezi Trade Network and the Rise of Msiri The roots of the Yeke Kingdom lie not in Katanga, but in the Tabora region of modern-day western Tanzania. There, among the Nyamwezi people (the "People of the Moon"), a sophisticated network of long-distance trade had flourished for generations. Nyamwezi caravans, known for their legendary endurance and organization, traversed the harsh miombo woodlands, linking the Swahili-Arab trading ports of the Indian Ocean (like Bagamoyo and Zanzibar) with the interior. They dealt primarily in ivory and, increasingly, in enslaved people, exchanging these goods for imported cloth, beads, and firearms. yeke kingdom

The Yeke warriors were stunned. Their god-king, the man they believed to be invincible, lay dead. Stairs ordered Msiri’s body decapitated and the head hoisted on a pole in front of Bunkeya as a gruesome warning. He then forced the Yeke elders to sign a "treaty" ceding the kingdom to Leopold. The Stairs Expedition then looted Bunkeya, stripping it of its copper treasures, ivory, and the legendary mwano copper cross, which was broken up and shipped to Europe. The Yeke Kingdom collapsed with shocking speed. The empire, so dependent on the personal charisma, strategic genius, and ruthless authority of Msiri, could not survive him. His sons and successors, including Mukanda-Bantu and his daughter, the formidable Mwami (Queen) Maria Fwasa, led desperate resistance for a few years, but they were overwhelmed by the superior firepower and brutal counterinsurgency tactics of the Congo Free State's Force Publique. Many Yeke fled south across the Luapula River into what is now Zambia, where their descendants live today, preserving their distinct identity and the memory of Msiri. Today, Msiri remains a controversial but revered figure

The legacy of the Yeke Kingdom is complex. For decades, European colonial historians dismissed it as a brutal, parasitic slave state—a product of "Arab" influence on the "primitive" interior. This view, steeped in colonial racism, ignored the sophisticated indigenous state-building that Msiri achieved. He did not copy an external model; he hybridized Nyamwezi military organization with Luba-Lunda concepts of sacred kingship and economic control. The Yeke identity persists, a proud reminder of

Leopold sent a series of expeditions to secure Msiri’s submission. The first, led by a German adventurer, Hermann von Wissmann, failed to even meet the king. The second, the Stairs Expedition of 1891, would be decisive. Commanded by the arrogant and ruthless British-Canadian mercenary Captain William Grant Stairs, the expedition was a small, heavily armed force of Europeans (including a Belgian, a Polish-born engineer, and a Swiss doctor) and several hundred African mercenaries, mostly Zanzibari askaris.

Yeke Kingdom May 2026