perdu Posted April 5, 2020 Author Share Posted April 5, 2020 I confess I have been putting this one off but at last a few of the tapered trailing edges have been started I did have an alarming moment when I discovered that a few of my blanks were over width but as there were several to choose from it was not a problem The overwide ones on the left here Annoying isnt it? Anyway I finally got my eight And these have had their leading edges sanded to the required section Phew Right this evening's little task make all these blanks the right length and begin the necessary shaping 15 Link to comment Share on other sites More sharing options...
Brandy Posted April 5, 2020 Share Posted April 5, 2020 The sand(ing) man cometh! have fun! Ian 1 4 Link to comment Share on other sites More sharing options...
Tomoshenko Posted April 5, 2020 Share Posted April 5, 2020 Cometh the sanding cometh the man 2 Link to comment Share on other sites More sharing options...
Terry1954 Posted April 5, 2020 Share Posted April 5, 2020 I don't envy that task Bill, but am in no doubt you will produce eight beautiful blade replicas! Terry 1 Link to comment Share on other sites More sharing options...
hendie Posted April 5, 2020 Share Posted April 5, 2020 nice job so far Bill, I have no doubt you will have a masterful batch of rotors when you've finished 1 Link to comment Share on other sites More sharing options...
perdu Posted April 6, 2020 Author Share Posted April 6, 2020 Masterful Alan, I have me doubts but at least there are eight of these now And separated for type/direction of rotation I can begin to work on these now as I re-engineer some parts of the rotor heads, plenty of work to do in there Also (but with no pictures) I am trying to mask the nose bubble prior to getting it all done and filled with switchery and panels 14 Link to comment Share on other sites More sharing options...
busnproplinerfan Posted April 6, 2020 Share Posted April 6, 2020 How did you sand the airfoil int the rotors? I tried that before and I can't get them consistent. I need to learn for some future projects. 1 Link to comment Share on other sites More sharing options...
perdu Posted April 6, 2020 Author Share Posted April 6, 2020 6 minutes ago, busnproplinerfan said: How did you sand the airfoil int the rotors? I tried that before and I can't get them consistent. I need to learn for some future projects. It is all on there The jig on the left side of the mouse mat maintains a fixed depth of plastic strip, in this case high enough to get the aerofoil section filed on each side of the strip The depth is set by 0.030" rods, you can see the one I used for this depth just poking its little nose out of the front of the jig in the picture It was possible I might need a deeper taper which is why I left the depths able to be altered by adding rods The blanks are 0.030" as is the gap between the sides Any depth adjustment is done in 0.030" increments, this I found did exactly what I needed As a one time, now retired toolmaker I often make jigs in order to enable frequent copies of a part I am working on to be produced The white sanding strip by the jig was almost perfect for the job, a few wipes with a file and then take it to size with the sanding strip 13 2 Link to comment Share on other sites More sharing options...
giemme Posted April 6, 2020 Share Posted April 6, 2020 Those blades look impressively consistent, Bill Ciao 1 Link to comment Share on other sites More sharing options...
The Spadgent Posted April 6, 2020 Share Posted April 6, 2020 Very nice Bill. 🙌 1 Link to comment Share on other sites More sharing options...
Tomoshenko Posted April 6, 2020 Share Posted April 6, 2020 Excellent workmanship Bill, and good old school techniques and skills. 1 Link to comment Share on other sites More sharing options...
busnproplinerfan Posted April 6, 2020 Share Posted April 6, 2020 6 hours ago, perdu said: It is all on there The jig on the left side of the mouse mat maintains a fixed depth of plastic strip, in this case high enough to get the aerofoil section filed on each side of the strip The depth is set by 0.030" rods, you can see the one I used for this depth just poking its little nose out of the front of the jig in the picture It was possible I might need a deeper taper which is why I left the depths able to be altered by adding rods The blanks are 0.030" as is the gap between the sides Any depth adjustment is done in 0.030" increments, this I found did exactly what I needed As a one time, now retired toolmaker I often make jigs in order to enable frequent copies of a part I am working on to be produced The white sanding strip by the jig was almost perfect for the job, a few wipes with a file and then take it to size with the sanding strip So you put the strip in the jig and file trailing edge then reverse it for the leading edge? 1 Link to comment Share on other sites More sharing options...
Space Ranger Posted April 6, 2020 Share Posted April 6, 2020 7 hours ago, busnproplinerfan said: How did you sand the airfoil int the rotors? I tried that before and I can't get them consistent. I need to learn for some future projects. I've used some of my precious Contrail strut stock for rotor blades. I've also made them from styrene strip stock of a thickness slightly more than required. I attached the wide side of the styrene strip to a narrow balsa block and then shaped the blade with a sanding block. If you use a long enough strip, you can get more than one blade out of it. If that's not possible, then use more than one strip cut to length, each attached to its own balsa block holder. In this case, the trick to making them uniform is NOT to completely shape one blade and then try to make the others match, but to sand a strip with one swipe of the sanding block, then repeat on the others. Then go back to the first and repeat, trying to duplicate the pressure and angle of the sanding block each time as much as possible. Another alternative is to make one rotor blade, then cast it in resin, but that's a whole 'nother skill set (and a whole 'nother kettle of fish!). 1 1 Link to comment Share on other sites More sharing options...
perdu Posted April 7, 2020 Author Share Posted April 7, 2020 8 hours ago, busnproplinerfan said: So you put the strip in the jig and file trailing edge then reverse it for the leading edge? The beauty of this method is that you csan too both sides without taking the blade out for 'side two', just file the edge on the other side OK? oops late night posting after watching Ozark, I meant 'you can taper both sides without... 2 1 Link to comment Share on other sites More sharing options...
perdu Posted April 8, 2020 Author Share Posted April 8, 2020 We have been here before, ish. The nose bubble is on and black filled with PPP and Vallejo, you just have to try dont you Let that dry/harden then finish it off Breaking news Bill is not happy with the windows Something must be done... 9 1 Link to comment Share on other sites More sharing options...
Martian Posted April 8, 2020 Share Posted April 8, 2020 1 hour ago, perdu said: Breaking news Bill is not happy with the windows A thorough micromeshing, followed by some vigorous polishing with some Novus Blue plastic polish is the way to go with the windows Bill. I put a buffing wheel on the Dremel for this. Martian 👽 3 Link to comment Share on other sites More sharing options...
perdu Posted April 8, 2020 Author Share Posted April 8, 2020 I don't have any of the polish Martian but I will try dremelling them with toothpaste maybe Link to comment Share on other sites More sharing options...
perdu Posted April 8, 2020 Author Share Posted April 8, 2020 This is plan a PETg hot draped round the fuselage so I can cut out thinner clear windows I might try to save the old ones Martian's way first though now I have blanks I can work with 8 Link to comment Share on other sites More sharing options...
Biggles87 Posted April 8, 2020 Share Posted April 8, 2020 Toothpaste? You must be a disciple of the late Alan W Hall. 2 Link to comment Share on other sites More sharing options...
AdrianMF Posted April 8, 2020 Share Posted April 8, 2020 13 minutes ago, Biggles87 said: Toothpaste? You must be a disciple of the late Alan W Hall. Toothpaste is probably a bit less abrasive now than it was in the 1960s... Regards, Adrian 3 Link to comment Share on other sites More sharing options...
CedB Posted April 8, 2020 Share Posted April 8, 2020 I'm with Marian Bill - save the Whales old ones if you can eh? 2 Link to comment Share on other sites More sharing options...
perdu Posted April 8, 2020 Author Share Posted April 8, 2020 29 minutes ago, Biggles87 said: Toothpaste? You must be a disciple of the late Alan W Hall. Nothing beats polishing clear plastic with toothpaste and denim And Alan was definitely one of my heroes 8 Link to comment Share on other sites More sharing options...
Space Ranger Posted April 8, 2020 Share Posted April 8, 2020 9 hours ago, perdu said: I don't have any of the polish Martian but I will try dremelling them with toothpaste maybe Just don't try that on your teeth! 3 1 Link to comment Share on other sites More sharing options...
Space Ranger Posted April 8, 2020 Share Posted April 8, 2020 7 hours ago, perdu said: Nothing beats polishing clear plastic with toothpaste and denim And Alan was definitely one of my heroes Mine, too, The man could do amazing things with balsa wood, perspex, and talcum powder! Link to comment Share on other sites More sharing options...
perdu Posted April 8, 2020 Author Share Posted April 8, 2020 "Just don't try that on your teeth!" Oh? Well if you're sure... 3 Link to comment Share on other sites More sharing options...
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