Or PETG.
I see what you mean. I'll try to come up with something. Still adds more drag than necessary.
I wonder how ABS takes the friction? I have delrin buttons with 20 flight on them and only a bit of a flat spot. And they only cost me a quarter each. For standard buttons, I wonder if 3D printing is the best process. Especially since there will almost always be a bond layer where it transitions back to the outer part of the button that holds the rocket on. Maybe some pull out tests would see where that shears off at.
Edward
Or PETG.
I wonder how ABS takes the friction? I have delrin buttons with 20 flight on them and only a bit of a flat spot. And they only cost me a quarter each. For standard buttons, I wonder if 3D printing is the best process. Especially since there will almost always be a bond layer where it transitions back to the outer part of the button that holds the rocket on. Maybe some pull out tests would see where that shears off at.
Edward
I printed some in clear PETG. Need a little sanding but they are very tough.
Thanks
I'm now on to creating conformal versions of what I have designed up to now.
1010 Conformal Aero Rail Button 3/16" (4.76mm) Standoff
They are designed to be conformal to the rocket airframe tubes in these standard sizes - 38mm (1.5 in.), 54mm (2.13 in.), 65mm (2.54 in.), 75mm (3 in.), 98mm (4 in.), 140mm (5.5 in.), 155mm (6 in.), and 195mm (7.5 in.). They are compatible with the 1010 aero rail buttons I have designed above.
I've been using these 3D printed conformal airfoil buttons that I've had Shapeways.com print:
They get epoxied to the surface. Shapeways uses nylon as a default material, and that seems to be working pretty well for this type of part. I will caution that they need to be printed at high resolution to have decent structure; the section thickness are small enough that there isn't a lot of forgiveness for gaps in the layers.
Great collection of parts!
Have you flight/load tested the rounded buttons? Some rocketeers hang their rockets underneath when raising the rails.
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