MY GRAND DAD, after my ordeal with the sea and surviving a drowning thanks to the Fleetood RNLI Mechanic in 1959, taught me the basics in woodwork, on how to hold and use all sorts of saws, chissels, planes, and other fine tools of his collection, as he was a pattern maker and City and Guilds Master Cabinety maker and I never lost those skills, but two things he said to me taught me a great deal and helped me move on in both my carear as a high school Woodwork and tech drawing teacher and a model maker......the first was............"if you can do better son, go away and show us".........meaning, dont denegrate other peoples work, what ever you may think, and hopefully that has always stuck with me, as your skills cal always be bettered by others...........or simly humbleness is always better.
And the second was, if you dont experiment, , you'll never get any better in your hobby............he was very forward thinking and he was right.
Today I took that chance! Some days ago I showed a little piece where you dont need to buy a pack of moulding rubber for 20 quid when you only need to make something that you can just press into a lump of plastisine your fitting that you need a one off.........
Well today, I remembered my grand dads message and words, as though he was next to me and almost willing me on to try and gave me the impetus to try, as i had never tried it befor,e and that was to try a split mould from plasticine.
I needed a simple small propellor for the outboards on my RIB, as I could only find one.
And so I made two round patties [like mcdonalds beaf burgers], but about an inch thick each and once done, I pressed the main bult including the blades into the bottom half, and then as a release agent I used some Savlon cream [cuts and grases as I suffer plenty of those in my old age] as i couldnt find any vasciline, and then put the top patty onto the mould and stuck it all in to the fridge for about 3 hours to go hard.
Once very cold and hard I cut some locating grouves into the sides of the full mould whilst still together to make sure everything lined up. I took the two halves abart and poured some casting resin in to each half after seperating the halves and removing the original propeller.
This is a quick acting resin and poured into each half of the mould enough to fill and slightly overflow making sure there was enough resin to fill and within about 3 minutes the resin left in the mixing jug was going rubbery, and so, making sure the guide cuts on the side lined up I joined both top and bottom moulds, and left for about an hour to cure.
To my absolute amazement,out popped a perfectly formed 2nd propellor.............GRAND DAD BOB, I solute you!