Building the deHavilland Cirrus Mk I
THIS PAGE UNDER CONSTRUCTIONCreated: Feb 2005
Last update: September 2006
The late Merritt Zimmerman designed replicas of the DeHavilland Cirrus I in 1/4 and 1/6th scale. He built several for sale (I've heard the figure 25 bandied about), and presented the plans to Robert Washburn to help kick-start SIC Magazine. The 1/4 scale version was built and documented by Ron Colonna. Eric Whittle did likewise with the 1/6 scale version and later reduced it to 1/9 scale. His plans and the construction feature for the latter appeared in English magazine, Engineering in Miniture. The cylinders, pistons, 'rods, and head of this engine formed the basis for Eric's Aero V8 that was serialized in the Model Engineer. This makes for a very satisfying symmetry, as the full-size Cirrus I, designed by Major FB Halford, began as the (metric) cylinders, pistons, 'rods, and heads of a WW I era Renault V8!
Despite my intent not to write about the construction photos, I've weakened under urging from others and added some words of explaination on the less obvious steps, plus a couple of gotcha's.
Crankcase
Camshaft
Conrods
Crankshaft
Cylinders
Pistons and Rings
Valve Gear
Cylinder Head and Manifolds
Assembly
Engine Mount and Running
By the way, the Cirrus Mk I picture at the top of the page is Kurt Bjorn's. Click on the pic to read about it.
This page designed to look best when using anything but IE!
Please submit all questions and comments to
enquiries@modelenginenews.org
Copyright (c) Ronald A Chernich, 2004-2005. All rights reserved worldwide.