dr wogz
Fly caster
Here is my [quick] submission to the weekly design challenge" hole guide. is there room for refinement?! You bet!
I'm not big on using a drill guide for holes. Marking yes! Either use a drill press, use / master the skill with a hand drill, or use a guide that is metal, preferably a hardened steel sleeve guide. Again, using a such a guide is (for me) another thing you need to hold while trying to drill, and therefore interferes more than it helps.
Another thought was that this is to drill vent holes & shear pin holes. You don't usually find such a feature on smaller less-than 2.6" rockets. this design is 8" overall, so it would fit up to about a 6" dia. airframe (and 8" is about the limit for most printers). I'm also a big fan of one tool for various sizes / applications.
it's design for 3, 4, 6 8, 9 or 12 fins.
the arms have a very shallow V on their faces to center on the tube. The also feature a notch on the top facet o make them all equal before affixing to the airframe (they should be calibrated to indicate a 3" or 4" or 3.125" dia. circumference, but I'm being lazy / it s a quick design.)
STLs coming
I'm not big on using a drill guide for holes. Marking yes! Either use a drill press, use / master the skill with a hand drill, or use a guide that is metal, preferably a hardened steel sleeve guide. Again, using a such a guide is (for me) another thing you need to hold while trying to drill, and therefore interferes more than it helps.
Another thought was that this is to drill vent holes & shear pin holes. You don't usually find such a feature on smaller less-than 2.6" rockets. this design is 8" overall, so it would fit up to about a 6" dia. airframe (and 8" is about the limit for most printers). I'm also a big fan of one tool for various sizes / applications.
it's design for 3, 4, 6 8, 9 or 12 fins.
- print out oen ring.
- print out 3 or 4 (or 6 or 9) arms.
- Tap the 12 holes in the ring: 1/4-20.
- Get some 1/4-20 x 1" thumb screws & washer.
- Loosely screw 3 or 4 (or 6 or..) of the guide arms to the ring as shown
- Affix around the airframe, and use a strap or elastic on the tangs jutting out below to hold the arms to the air frame.
- tighten the thumbscrews.
- Use the 'V' groove on the top of the arms to mark your drill points.
- remove & drill your holes.
the arms have a very shallow V on their faces to center on the tube. The also feature a notch on the top facet o make them all equal before affixing to the airframe (they should be calibrated to indicate a 3" or 4" or 3.125" dia. circumference, but I'm being lazy / it s a quick design.)
STLs coming
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