Builder #5: Frank Deeth - email for more information Location: Melbourne, Australia Start date: Officially April 2007 but unofficially about 1995. First flight goal date: Too far away to contemplate at this stage. The Project: Tail Chase
Since starting the SAC Spitfire it evolved that I should build the two seat Tr.9 version. A few differences with Russ's aircraft is the pointed broader cord rudder of that series and the larger elevator balance horns. In this folder you will see progress of my tailplane coming together as well as the areas where I have modified the plans.
As well as changing the profiles slightly I have also decided to manufacture the parts in a very similar method to the original with no ply sandwich covering of the rudder and elevators...just fabric like the original aircraft. To this end I have increased the size of the materials used in the ribs and in the spars as well as thicker plywood webs on those spars. It has been a laborious project to 'stretch' the rudder ribs and rudder spar for the larger dimensions. I have used original Spitfire drawings quite a lot for the overall dimension increases as well as other sources to make sure the material sizes would be large enough. Check out these pictures of ORIGINAL AIRCRAFT to get an idea of the larger rudder compared to the early model aircraft.
Started construction of rudder spar
first. Method of construction is the same just dimensions of materials and unit larger to follow larger original part. The important thing to note is
I used the same tip profiles in the plans but used laminated plywood rather than solid spruce specified in the plans. Production line of rudder
and fin ribs started to develop also. Because of the changes there have been a few areas that I could not
finalize but rather will have to design
on the run. Most of it is around the area of the trim tab and how construction with take place.
Above - rudder and fin rib jigs, ready for production
11/23/2010 - A picture of the finished horizontal stabiliser spars. Although the curved tips look finished they need to be profiled prior to final assembly.
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