I have two Lucas Freelites here in Somerset together with original parts and copies of the Lucas manual. One has a fully (Lucas restored) 24v dynamo and it was used on my Integrated Solar Dwelling in Brighton which was the UK's first monitored off-grid passive solar R&D project.
In the 1970's I created a modified lightweight tail to improve furling and a smaller diameter (faster) blade with rounded tips to improve the power output and reduce noise. The original Lucas douglas fir prop was a very crude design (made to simplify manufacture) which was noisy and also suffered from tip erosion.
My blades used a Clark Y airfoil section and I used to machine these blades for the turbines I sold under the Aerodyn brand, using simple jigs and a special planing machine which I created. I used lightweight woods such as Jelutong and then hand-coated the blades with SP epoxy resin. Glass cloth, or thick self-adhesive alloy tape can be added for leading-edge protection. It is fairly easy to hand-carve a new blade providing you have patience and skill...
The Freelite is of course very heavy, of limited power output and way out of date, - and you could generate much more power if you hand-built your own slow-speed permanent magnet alternator... (It does not have to be a crude axial-field design which is inefficient in the use of steel, copper and magnet material).