Propellers, propellers, propellers…. what beautiful things they are… sleekly simple in concept, stunningly complex in geometry.
I needed some. So I made some.
What follows is a photographic document of the making of my propellers for the Heavy Angel sculpture. Each propeller has three blades and each blade is three sheets of 9mm marine ply thick with an interlocking central disk system. I spent a morning in the Science Museum’s aviation section studying various propeller designs before settling on the below profile design.
I marked-up and jig-sawed 18 blanks and glued them up in stacks of three creating my six blade blanks.
I then needed to figure out the shape of the blade within this block, mark it up and carve it out.
This was done by masking off the shape as it appears on the edge of the blank. I then made a series of cuts along the blank
and chiseled and filed off the excess wood to an approximate shape.
Then I sanded and refined it by hand and with a small bench mounted belt sander.
Then I did the same to the other side.
The blade itself has an aerofoil shape with a fat leading edge and thin trailing edge which needed to be considered during shaping.
Next they were filled, stained, sealed and varnished…
…and sanded and varnished and sanded and varnished.
And here they are.
It was very much a process of trial and error and it bears the scars of that on the blade to the lower right of the above picture. That was the first blade I shaped and the initial cuts were too deep. I quite like this though as it exists a some kind of visual history of the learning process; a reminder that at the beginning of this I had never made a propeller before.