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Norm Ellis

Norm Ellis
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Sizing an Avionics Cooling Fan

How much is enough?

Cool Runnings

Norm Ellis does the math and shows you how to select the right oil cooler for your engine-cooling package. Given the critical role oil temperature plays in engine health, its a good idea to go beyond selecting the smallest, lightest and cheapest cooler you can find.

Stainless Steel

Author Norm Ellis is not a particular fan of stainless-steel, even though he knows it has its place-even if that place is not in your airplane. After providing a brief history of this widely used material, he makes a case for choosing the right stock for the right project on the basis of utility rather than beauty-and he offers the stats to back up his assertions.

Unusual Attitude: GPS and Reality

While he admires and uses them, author Norm Ellis laments the lack of user-friendliness in todays GPS units. Editor Marc Cook counters that argument and extols the virtues of GPSes, complications or no, and their value in the cockpit.

In Case You Missed it

Ask the DAR

Applying for a repairman certificate, replacing a missing airworthiness certificate.

Risky Business

Checklists-giving the madness method. By Sid Mayeux.

The Perils of Cartooning About Avionics

Whenever I try to cartoon about avionics, all I get is resistance.

Unairworthy

Bald tire.