Design Innovation
A designer must make a large number of decisions in the process of designing an airplane. These range from top-level decisions, like the overall...
Variable Geometry Cooling System
The way to reduce or eliminate excess cooling drag in cruise is to use a variable-geometry cooling system that can change shape to control the amount of air flowing through the cowling.
Cooling Outlet Design
The design must focus on sufficiently cooling the engine while minimizing drag.
Cooling: Internal Flow
Cooling the engine and its accessories requires a continuous flow of air to come in from outside the airplane to absorb heat from the...
Cooling Inlets, Part 2
As we saw last month, an ideal cooling air inlet system should ingest air from the free stream and bring it to rest or...
Cooling Inlets
The cooling air inlet serves two functions: First, and most important, the inlet must ingest enough air to properly cool the engine and accessories...
Cooling
As we saw in last month’s edition of Wind Tunnel, only about one-third of the energy released by burning the fuel in an internal...
Power and Heat
The cooling system is a major component of the airplane. It has a large impact on the performance and reliability of the machine. The...
Prop Blade Effects
We often treat the propeller as a uniform “actuator disc” and the slipstream as a uniform stream tube of accelerated and swirling air. While...
In Case You Missed It
Kerpow!
An untimely prop strike results in more than just a call to the insurance company. Decisions regarding engine and propeller replacement open up numerous options. By Bill Repucci.
Changing a Perfectly Good Airplane
Designing and building a modified RANS S-9, part 2. By Michael Ryer and John Wells.
