The late Duke Fox, of the Fox Manufacturing company, sure knew a thing or two about engines. In the late 1980's he ran a series of what today, we'd call "Info-mercials" in Model Airplane News magazine. These were called duke's mixture. Now naturally, Duke intended these to generate more sales of his motors and he frequently linked whatever technical aspect of model engines he delt with in the column to a particular product you could, and should buy now. That's to be expected.
But not all was crass commercialism. Through the column, also made offers of gift engines to clubs for use in trainers, try before you buy offers, etc. Mostly, the techical advice, tips, and explanations he provided were sound and practical. Below are links to selected columns and extracts which we think are so helpful and timeless, they need to be preserved.