the pile of arrows I have that are in disrepair are clear evidence of how lazy I've gotten with all of my archery endeavors. wood arrow shafts are relatively inexpensive compared to the alternatives if you match and assemble them yourself, and they can be repaired sometimes. most errant arrows that hit something hard will break right behind the point, costing only an inch of so of the length, leaving the rest of the arrow completely fine. for centuries a spliced hardwood "footing" was used to add length back to broken arrows. a little work, but much less than making a whole new arrow when you don't have machines for doweling.
I read about these "Reparrow" things a few years ago. bought a couple dozen last year and just now getting around to using them. they are a piece of hardwood arrow shafting with a 5 degree taper bored into one end. you taper your short arrow and glue on this piece of hardwood just like you would glue on a point. a glue-on footing. pretty nifty. the handful I did a few weeks ago have held up just fine, so I'm doing the rest of my shorty broken arrows today.
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I squared up the ends of the short shafts and tapered them. I wrap the tape around the end of the Reparrow to keep it from splitting when I'm putting two pieces together with glue. you have to push and twist a bit to force out the excess glue, and I split a couple the first time I did this. glue filled the splits, but it looks sloppy, so I'm taking preventive measure. plain old carpenters glue is what the maker recommends.
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these don't really align themselves very well with the arrow shaft, so I eyeball it and make sure each one is on straight before I set it aside to dry.
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let them dry tonight, cut them to the correct length, taper and glue on points. I won't have an hour total in this, and for two dollars per arrow, it is better than the 3-4 hours and $5 a piece to make new arrows.
this is one of the ones I've been shooting for the last few weeks.
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these come in walnut and white birch. I could care less since both are harder than the Douglas Fir arrow shaft I'm fixing. it would be possible to add up to three inches to a broken arrow. great idea, and easy way to salvage short arrow. need to get on with repairing a few worn out fletchings now. too friggin' hot to do anything else today.