Joe66 Posted June 6, 2016 Share Posted June 6, 2016 On my scale airbase, the planes are well used and a bit worn, spares are in short supply, so they make do with bald tires, and pray a lot on landing ! ...lol...just kidding....good thread - interesting ideas.... JayW, Harold and Jolly Roger 3 Link to comment Share on other sites More sharing options...
dodgem37 Posted June 6, 2016 Share Posted June 6, 2016 Thank you, Paul. Thank you, D.B. Sincerely, Mark D.B. Andrus 1 Link to comment Share on other sites More sharing options...
Zero77 Posted June 6, 2016 Share Posted June 6, 2016 Pick a gear, any gear. The number of teeth on the gear is the number of diamonds down the center of the tire. I like jigs and fixtures. A pin holds the gear (and tire) stationary. The outer cylinder rotates to set angle(s), and locks down with a set screw. The slit is for a modeling saw. Once a groove is cut, pull the gear locking pin, and advance the gear by a tooth. Very clever system ! I wish i add the idea a few years ago when i wanted to scribe diamond threads on my X-1 tires... Though i'm not even sure i would have built the whole stuff. My diamond pattern is crappy and several lightyears from Harold or Paul quality. Chek and Harold 2 Link to comment Share on other sites More sharing options...
Harold Posted June 6, 2016 Share Posted June 6, 2016 (edited) Very clever system ! I wish i add the idea a few years ago when i wanted to scribe diamond threads on my X-1 tires... Though i'm not even sure i would have built the whole stuff. My diamond pattern is crappy and several lightyears from Harold or Paul quality. I took a very long time and many do-overs before I figured out a way to do it. I don't think I will be doing it this way any more. Printing is getting cheaper and with finer resolutions. Edited June 6, 2016 by Harold Chek and Zero77 2 Link to comment Share on other sites More sharing options...
Bryan Posted June 6, 2016 Share Posted June 6, 2016 I don't consider myself stupid (I imagine most stupid people don't) but I haven't the slightest idea how I would make a diamond tread tire...old school or with new 3D CAD..... My "solution" would be to dig around until I found a kit that came with them in the correct size. Or to do without.... Perhaps my problem is not stupidity but rather laziness and/or insufficient motivation. Chek and Harold 2 Link to comment Share on other sites More sharing options...
Zero77 Posted June 6, 2016 Share Posted June 6, 2016 I took a very long time and many do-overs before I figured out a way to do it. I don't think I will be doing it this way any more. Printing is getting cheaper and with finer resolutions. It also depends if you are a manufacturer who will be able to recoup the costs of the printing on several sales, or if you're just someone (for whome the time spent is free) who needs a pair of wheels for a single build. Harold 1 Link to comment Share on other sites More sharing options...
thierry laurent Posted June 6, 2016 Share Posted June 6, 2016 Note that dividing the circumference into equal intervals to create the lozenges is generally useless as you do not see what is against the ground...! As far as they are visually acceptable to look more or less like the full scale ones, this should be OK. Accordingly, making them with a jig and fine saw is less complicated that it may seem. Thierry Zero77, Chek and Harold 3 Link to comment Share on other sites More sharing options...
Bill_S Posted June 6, 2016 Share Posted June 6, 2016 Yesterday it was cool and rainy - not very conducive to painting. Though I'll probably never have need to make diamond treads, Paul threw down the gauntlet and it intrigued me. It was a good way to burn a couple of hours and brush up on my CAD skills. Zero77, Harold and Out2gtcha 3 Link to comment Share on other sites More sharing options...
Bryan Posted June 6, 2016 Share Posted June 6, 2016 Yesterday it was cool and rainy - not very conducive to painting. Though I'll probably never have need to make diamond treads, Paul threw down the gauntlet and it intrigued me. It was a good way to burn a couple of hours and brush up on my CAD skills. I might have misunderstood, but wasn't the gauntlet that Paul threw down about making them without CAD? Lee White 1 Link to comment Share on other sites More sharing options...
Bill_S Posted June 6, 2016 Share Posted June 6, 2016 I might have misunderstood, but wasn't the gauntlet that Paul threw down about making them without CAD? Bryan, the CAD was used to draw the fixture, not to put the diamond treads on - I think that was the intent of Paul's challenge. I could just as easily have drawn the fixture by hand, but it would have taken much longer. Link to comment Share on other sites More sharing options...
Ironwing Posted June 6, 2016 Share Posted June 6, 2016 (edited) JW Create a cylindrical plug.on your lathe to the maximum circumference and width. Calculate dimension of the diamond. Obtain square bar stock from which to cut sections. Height of each square section not not matter at this juncture but don't make them crazy thick. Turn each square section, such that, any two opposing corners run parallel with the circumference and chemically weld each section to the OD of the plug.Working from the center out. Weld each piece around the OD until you have the required number of treads. It will initially be irregular...not to worry. Concentrate on keeping the tread lines straight. One each tread is in place, Chuck the black in your lathe.spin. Using 220 W/D paper wet and attached to block, place it against the spinning part. It will run rough. This will subside as each segment wears down, and they all become coplanar. Once all segments are coplanar, begin forming the sidewall radii, again, using the 220 paper...check dims as per usual practice. You can repeat this process by making another one ( probably poor repeatability)or take the original and the cast to tires from it. This will guarantee a matching set. This process works pretty well comma isn't difficult to do, and really doesn't take much time. If you look in my 24th scale Mustang thread you'll see what I did to obtain the oval tread pattern found on period Aircraft G Edited June 6, 2016 by Ironwing JayW 1 Link to comment Share on other sites More sharing options...
JayW Posted June 7, 2016 Author Share Posted June 7, 2016 DB and Bill S have a jig meethod where the grooves are cut. Geoff has a method where diamonds are glued on. Great ideas all! I have some decisions to make. Thanks! D.B. Andrus 1 Link to comment Share on other sites More sharing options...
Guest Paul Budzik Posted June 7, 2016 Share Posted June 7, 2016 OK ... I'm doing a quick and dirty video to show how it's done old school. I'll have it up in a day or two. Nothing fancy. Paul LSP_Kevin and Harold 2 Link to comment Share on other sites More sharing options...
JayW Posted June 8, 2016 Author Share Posted June 8, 2016 Looking forward to that Paul! Harold 1 Link to comment Share on other sites More sharing options...
Ironwing Posted June 8, 2016 Share Posted June 8, 2016 You could cut the diamonds from sheet stock (.020/.030 ) That would give good thickness control...cutting the diamonds uniformly maybe problematic? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now