Cozy MK IV Serial #1537 N724CZ

This is my supplemental builders blog for a Cozy Mark IV which is a 4-seat, single engine, homebuilt light aircraft designed by Nat Puffer, with parts and plans supplied by Aircraft Spruce & Specialty Co. The aircraft is built from plans using basic raw materials. It is not a kit aircraft, though many small parts are available prefabricated. The Cozy is similar in design and construction to the 2-seat Rutan Long-EZ, from which it is derived, with approval from Burt Rutan.

Tuesday, June 4, 2024

Vance's Cowl Inlet Door and vented top cowl

Vance Atkinson implemented an adjustable NACA inlet lip. Also had vents above the #3 & #4 cylinders. IIRC, he said the cylinders were about 15 F cooler by adding the vents. The adjustable lip was only effective to a certain point but did help cooling on take off and reduced cooling drag in cruise.