I guess the archer would see damage to scores if that set up wasn't changed. I continued to advance the set up and no differences were observed after that.I cannot show video of what was happening at the advanced/early drop settings but I feel that even when set very early, the delay in the system meant the arrow lifted off the rest as normal, before the rest dropped.I could not get the rest to drop so soon that the arrow started to fly erratically and lower than expected.The type that are held up by tension from a rubber tube attached to a cable, could be set too early I suspect. I advanced it a little at a time and very soon that contact disappeared. I set it up to be late and powder tests showed contact with fletchings. A fall-away model virtually eliminates this problem. The drop-away rest is whisper-quiet, and comes with adjustable timing cords so your arrow is supported for as long as you need. I did make a drop away that I could adjust the time of the drop. The vast majority of problems you experience when tuning a compound can be traced to arrow/rest contact. Too soon would mean the rest drops before the arrow has travelled far enough to pick up enough speed and lift off as normal for fixed rest types.Too late would mean fletching contact, avoiding that is the main reason for using drop away.Anywhere in between those two would mean the rest drops at a time when the arrow has already lifted itself from the rest as seen in high speed videos of fixed type rests. Prong rests need some care, specially if the archer sets up with one fletch down to pass between the prongs.A powder test will show any contact.ĭrop away rests, can drop anywhere between too soon and too late. Now! If I were shooting 590+ portsmouths (I wish!) what I used, might, just might! make a difference. If whatever you use does it for you score wise, then I see no reason to change, just for the sake of it. VDT, using speed and timing, NOT inertia, passes the capture. Whether a drop away rest can be set up properly without the aid of high speed film, is again a moot point, things happen very fast from point of arrow release, a static setup could hide some surprises.Īt the end of the day, for most of us, it probably won't make much difference to our scores whatever type of launcher/rest we use. TOTAL FLETCHING CLEARANCE: DROP AWAY 0 - When the bow is fired, the launcher drops away. These films show that after the first few inches, the arrow has no effect on the launcher blade at all. With respect to the 'apparant' movement of the launcher blade shown in these high speed films, I believe this is due to the (slight) downforce of the arrow on the launcher at release due to the nocking point being on or slightly above centre. At this point (which is less than the bracing height) there is only a few inches before the fletchings start to go past the arrow rest, certainly not enough time for the arrow to start spinning to any significant degree.Īlso, as stated earlier, the back end of the arrow will have lifted off the arrow rest anyway.Īs far as i am aware, whether helical fletching helps at all is a moot point, but it shouldn't make any difference what type of launcher is used. Click to expand.The arrow can't spin, no matter how radical the helical, until it has left the bowstring.
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