Different letoff percentage at the same measured draw length would give the powerstroke a little more "umph" at the back end. Adjustable draw stops interrupt the rotation of the cams to change the letoff, so the increase in draw length that accompanies an increase in letoff should either cancel it out or show an increase in speed.
I am not surprised that holding weight does not impact initial velocity. I would think it effects comfort, like you said, as well as ease of derailment, and possibly some accuracy at some ranges.
It's not going to make it any more "comfortable", just means you can hold it longer. The down side is when you twitch and creep forward, it's GOING to want to drag you down. Personally, I prefer a lower let-off, 65-70%. Sure my hokding weight is higher, but I find I'm more stable on target.
Changing the let off changes the draw length. Going to 70% letoff from 90% will shorten the draw length because your stopping the cam rotation sooner to achieve 70% letoff. So the draw length should have been adjusted after the letoff was changed to 70%. This is easy to do with an elite bow given they have 1/4" draw adjustments. Simply adjusting the letoff without changing draw length to keep length consistent the speeds are going to be the same because your using the working part of the cam either way 90% is just more forgiving.
I agree, but think about my draw length-30.5 inches and 90% let off for the initial test. Let’s assume I then lowered let off the 70%, which would shorten the draw just a bit. I would then need to reorient the mods to add a bit of draw, but… I’m already at max draw for the bow 30.5, so there is nowhere to go. If we really wanted to see the impact of a perfect comparison, we would need to test with a shorter draw from the get go. The numbers will still be very close though, so not really worth the extra steps. My conclusion would be the same - shoot what works best for you! Happy holidays! Wishing you and yours well!
If you design a bow from scratch for 70% and one from scratch for 90% the 70% will be faster. Because the force curve will go a little farther at peak before dropping. It could theoretically be 14lbs higher across the back section of the curve. He just added more draw length to get more letoff. The draw length may have been designed for 70% and lengthened to get to 90%, if he had lengthened it that 1/4” AFTER setting to 70%, to be equal draw length to the 90% setting, it would likely have picked up 2-3 fps instead of dropping 1fps due to the shortened draw length.
The let off effectively shortened the draw length resulting in speed loss. You will need to redo your test getting actual draw lengths the same to be valid.
70% should be faster than 90%????? Would be nice to see the hold weight between 70 and 90. Are you sure you are moving let off and not adjusting back wall?
The let off on this bow slightly changes the draw length, but only by very small amounts. You can feel how much more weight you are holding at the back when at 70% when you compare it to 90%. The fps diff caused by the varying percentages is so small that the changes in the draw length to change the let off end up swapping the result from the expected. But yes, lower let off will get slightly more speed in most bows (it’s practically nothing though, so don’t sweat it). Happy holidays mate.
You are shortening the draw length. That is why it’s slower. Without a draw board you can’t come to a conclusion on anything done here. I hate to be harsh but this is just another youtuber that doesn’t know what he is doing or talking about.
I’m not wasting my time responding to you any longer. For future reference, there are multiple comment threads per video. Don’t read a section of one and form an inaccurate conclusion. Oh, and you have officially been promoted to Captain Doughnut 🍩
Different letoff percentage at the same measured draw length would give the powerstroke a little more "umph" at the back end. Adjustable draw stops interrupt the rotation of the cams to change the letoff, so the increase in draw length that accompanies an increase in letoff should either cancel it out or show an increase in speed.
You bet 👍
I've been curious about that....not enough to actually do it. Thanks for doing the work! ....and a new subsciber.
Glad I could help! Welcome to the channel!
I find this interesting and helpful. Curious about the bow, also. Best wishes to you and your family and be safe on this holiday weekend.
I’m glad! Best wishes to you and yours!
I am not surprised that holding weight does not impact initial velocity.
I would think it effects comfort, like you said, as well as ease of derailment, and possibly some accuracy at some ranges.
It's not going to make it any more "comfortable", just means you can hold it longer. The down side is when you twitch and creep forward, it's GOING to want to drag you down. Personally, I prefer a lower let-off, 65-70%. Sure my hokding weight is higher, but I find I'm more stable on target.
Great job testing!
Happy Thanksgiving 🦃
God Bless you and your family 🙏😇❤️🇺🇸
Thanks man! Hope you have a great holiday!
Wouldn't decreasing the letoff also decrease your draw length?
Nice observation! It does, but only very slightly. Probably max of a half inch difference between 70% and 90%.
@@LWYLoutdoors Probably only 1/4”, but adjusting it to the same actual draw length should give 2-3 fps more at 70%.
@@ryanmarino4230 agreed 👍
Changing the let off changes the draw length. Going to 70% letoff from 90% will shorten the draw length because your stopping the cam rotation sooner to achieve 70% letoff. So the draw length should have been adjusted after the letoff was changed to 70%. This is easy to do with an elite bow given they have 1/4" draw adjustments. Simply adjusting the letoff without changing draw length to keep length consistent the speeds are going to be the same because your using the working part of the cam either way 90% is just more forgiving.
I agree, but think about my draw length-30.5 inches and 90% let off for the initial test. Let’s assume I then lowered let off the 70%, which would shorten the draw just a bit. I would then need to reorient the mods to add a bit of draw, but… I’m already at max draw for the bow 30.5, so there is nowhere to go. If we really wanted to see the impact of a perfect comparison, we would need to test with a shorter draw from the get go. The numbers will still be very close though, so not really worth the extra steps. My conclusion would be the same - shoot what works best for you! Happy holidays! Wishing you and yours well!
If you design a bow from scratch for 70% and one from scratch for 90% the 70% will be faster. Because the force curve will go a little farther at peak before dropping. It could theoretically be 14lbs higher across the back section of the curve. He just added more draw length to get more letoff. The draw length may have been designed for 70% and lengthened to get to 90%, if he had lengthened it that 1/4” AFTER setting to 70%, to be equal draw length to the 90% setting, it would likely have picked up 2-3 fps instead of dropping 1fps due to the shortened draw length.
Fair point, but 2-3 fps is still negligible in my opinion. Happy holidays!
The let off effectively shortened the draw length resulting in speed loss. You will need to redo your test getting actual draw lengths the same to be valid.
I have stated this in the other comments…
70% should be faster than 90%????? Would be nice to see the hold weight between 70 and 90. Are you sure you are moving let off and not adjusting back wall?
The let off on this bow slightly changes the draw length, but only by very small amounts. You can feel how much more weight you are holding at the back when at 70% when you compare it to 90%. The fps diff caused by the varying percentages is so small that the changes in the draw length to change the let off end up swapping the result from the expected. But yes, lower let off will get slightly more speed in most bows (it’s practically nothing though, so don’t sweat it). Happy holidays mate.
You are shortening the draw length. That is why it’s slower. Without a draw board you can’t come to a conclusion on anything done here. I hate to be harsh but this is just another youtuber that doesn’t know what he is doing or talking about.
@@olehemlock I hate to sound harsh, but you may just be another stale doughnut 🍩. Read the other comments… I explain exactly that…
@@LWYLoutdoors your explanation is in the reply’s is why I posted. Get a draw board. You don’t even know enough to know you are wrong.
I’m not wasting my time responding to you any longer. For future reference, there are multiple comment threads per video. Don’t read a section of one and form an inaccurate conclusion. Oh, and you have officially been promoted to Captain Doughnut 🍩