Is this too radical?

[williwaw]

I hope Longcruise doesn't mind a pic of a different sort of reflex, but I thought this might be a good thread to ask for opinions about what happens to stability if deflex is combined with a bow that carries most of the reflex nearer the tips?

[Shredd]

Thanks Bue...  You Da Man...   

[Longcruise]

I hope Longcruise doesn't mind a pic of a different sort of reflex, but I thought this might be a good thread to ask for opinions about what happens to stability if deflex is combined with a bow that carries most of the reflex nearer the tips?

I don't mind in the least.

My first rd design is very similar to that and there are no stability problems.   I'll try to put a picture up later.  I use stabilcore in it but probably don't need it.

[Shredd]

  Willi...   I think I did a bow like that in one of my earlier designs...  I don't remember having a stability problem...

[Longcruise]

Here's a picture.

[williwaw]

Thanks Long.

I suppose the stability problems come when the tips get too far ahead of the handle?

consider these two bows, both have the tips the same distance ahead of the handle and the same deflex The tip distance ahead of the handle is presumed excessive for sake of illustration

Is one more unstable than the other on account of the reflex placement along the limb?

[Crooked Stic]

I think that green thing will be very stable.

[Stagmitis]

Hey Bue LOVE that longow!

I have shot many R&D bows and I find that the further the tips get from the back of the riser the more they magnify shooter error and are less accurate even though stable.

I think you can pick up speed getting the tips past the riser and with the right tapers not have an overly reflexed tip.

You have an exceptional design there with amazing speed yet accurate enough for everyday shooting, 3d work or hunting- Imho the hotrods are only good for one thing-Showing off at the Chrony!

In terms of length I have hunted with a 68" bow for years under all conditions-No problem. If a mature whitetail can run at 40 mph through the woods and know the tolerance within an 1/8" I think my advanced brain can adjust too

Bowyers always talk about their 58" bow that can draw to 30" without stacking-Great! But they never talk about string angle and accuracy

[Flem]

What he said  

[Crooked Stic]

I got to put 2 cents in here. Just happen to have a 58 in. Longbow that will go 32 in. They look weird at full draw but string angle is good. And as accurate as the operator.

[williwaw]

Hey Bue LOVE that longow!

I have shot many R&D bows and I find that the further the tips get from the back of the riser the more they magnify shooter error and are less accurate even though stable.

I think you can pick up speed getting the tips past the riser and with the right tapers not have an overly reflexed tip.

Edit: I misread Stags quote

What would be the goal of the purpose of "the right tapers"? putting the bend in the limb where it will yield the best speed for the given R/D?  How does one best describe Bue's bend?

[Stagmitis]

Williwaw didnt leave that word out but I did these.."not have an overly reflexed tip AT BRACE..Which Bue commented on previously.

His design has a nice bend coming off the fades but there is enough stiffness there not to create a hinge- The limb in the outer third + remains stiff at full draw but not too stiff. There is a slight hint of reflex at brace that opens up a bit at full draw but not too much maintaing stiffness. The whole limb appears to bend nicely storing energy.

I would love to hear from others what they think.

[Buemaker]

Stagmitis have described very well how the limbs bend. On how to obtain that several things come of course into play, bowform, riser shape, riser lenght, limb lenght, limb shape and such. But what is easy to explain is taper rate. The limbs have a total forward taper of .003, but 8 inches before string notch the taper changes to a .004 reverse taper, kind of an integrated tip wedge. This in order to stiffen the tips a bit. Seen from  the side the bowform is a true circle.The fade outs is going a bit into where the limbs gently starts to reflex.

[williwaw]

Stag,
re reading this morning I see better your meaning, thanks for your observations and comments.

Bue,

The last time I made this model shot trough a chrony from a shooting machine, 55 pound bow at 28 inch draw with a arrow 9,75 grain pr pound the speed was 192 feet. The one that shot 192 feet had a 3/4 inch shorter handle and the reverse taper a bit shorter at the tips. I will test this new one when I get it done.

I look forward to the test results. Thanks for sharing.