(Morrigan, as a synonym of Morgan of Arthurian legend)

Wednesday, 22 April 2015

Bodywork

The design of the bodywork is progressing and updates have been made to the chassis to get the EPAS column to fit and have suitable locations for mounting.

The body design needs finishing before I can start on its internal ribs and stiffeners that will give it rigidity and provide the attachment points for the panel pieces.

Updated chassis and current itteration of the bodywork

Mirrored bodywork

The plan for building the body shell is to use the construction method employed for light aircraft; namely internal lightweight frames with a riveted skin. By using countersunk rivets it should be possible to attain a high finish by using a combination of body filler, sanding and a high build primer.

The body ribs would be held by a framework and the same connection locations would be used to attach the body to the chassis; hence the hoop frames of the chassis.

Below is a picture of a full strength countersunk rivet connection, where the plates have been dimpled prior to the rivet being affixed. A combination of rivets and a flexible epoxy glue will give a lightweight rigid shell.

Dimple countersunk rivet

Some good sources for dimple flush riveting come from the home aircraft builders in the USA the photo above is linked from the sonex1362 blog. Other links are; vansaircraft for military riveting design specs and skysaber.com for flush riveting solid rivets.

Friday, 10 April 2015

Body design


The bodywork is being styled using two 1930's vehicles as a basis. The first the Alfa Romeo 6C 2300B Mille Miglia Spyder for the front end; I need the horizontal parallel single curvature of the Alfa inner wings to cover the wishbone suspension. And secondly the Squire Vanden Plas from aft of the wings which will be swept down to running boards. 

Alfa Romeo 6C 2300B Mille Miglia Spyder 

Squire Vanden Plas

So far the design has used single curvature panels for all of the bodywork with the exception of the radiator / nose. The wings are yet to be designed, and these may need to be either made to order (cant avoid double curvature without significant welding requirements) or made up in carbon / flax / GRP composite.

Body work to date I

The plan for fabrication is to upset / dimple the sheet for counter sunk rivets in combination with epoxy adhesive. The skin will be supported by transverse and longitudinal elements which will also be used to provide attachment points to the chassis. More on this later.

Body work to date II