Awesome result! Could you please tell me which material was used for making the inflation bladder? Or can you tell me which material for this will be the best nowadays?
g'day :) how would you build a mold for planes where the planform isn't based on a linear taper, something elliptical? to get a straight hinge line, the individual airfoil stations have to be shifted up and down a bit, aligned to the hinge line, and that results in a slightly wavy trailing edge so i guess a flat board wouldn't suffice as a parting plane CNC would work, of course, but this process is really elegant and simple
Hi Mark, making parting planes is the one for the thinks I don't like doing out of the whole moulding process, they are difficult to get right. I have recently moulded a Boomerang this was one of the hardest things I've had to put into a parting plane, it is basically to wings that are at opposites to each other so the party plane rises and falls plus the tips rise up, the only way I can do this was to put it into a thicker piece of MDF then shape it down to the parting plane, this took some time and I had to fill some places with Bog to build it back up agen. I had to make sure the part had to go back into the parting plane exactly the same place every time to get it right. Hope this helps. Kev
I was using a plastic rubbish bag for the bladder, I don't know what compressor you have, don't be too concerned about having holes in the bladder you only need 5/10 psi and if your bladder fully inflates and holds pressure for 30 second's that will be enough to close the seems.
@@windburner1 Thanks for your quick reply. I tried to use HDPE plastic, and the challenge was to make a consistent press and speed, if it was too strong or too slow, the plastic would be burned. Unfortunately, the leakage is not allowed for my purpose, because I'm using it in Vacuum infusion (VARTM) and the bladder will be exposed to the open air, so it will inflate because of the vacuum. If it has leaked, so the epoxy will gonna have bubbles. The bladder will do the job just like the vacuum bag but located inside the core. So far I'm using latex, but for some purpose, I can not use it, because I can't take out the mold core from it, so using a plastic bladder is a better method, so I'm still looking for the best method how to laminate the edge strongly and has no leak at all.
Hi Frank. The carburettors gravity fed, I found a piece of hose that fitted onto the carburetor, drilled a hole in the top of a drink bottle put the hose into that then cut off the bottom of to make it into a funnel then simply taped it onto my handle bar to get it running. Is the inside of your tank rusty, there are products you can get to resurface the inside of your tank, my local paint suppliers sell this product, also I replaced my fuel taps with new ones so no more leeks.
That was great Kev! Sweet setup. Well done to you and Tracy. Maybe a little vacuum cleaner pipe/fitting attached to the top and bent to the right position will take care of a good percentage of the dust? Love your work!
Yes it does, the machine is a work in progress I am aware it creates a lot of carbon dust, this was only the second wing I had cut on the machine will definitely have to sort out a dust management system on it.
Hi Wind burner, I want to know more about in mold painting. Can you tell me it's full process. I am using wax and PVA as release agent and now I wish to try in mold painting technique. Like your work & video too much. Best regards, Manish
