Arrow building..Has anyone ever ???

[L. E. Carroll]

I asked a question a bit ago on another post concerning arrow noise and wood shafts... thinking I would get a better response by re-posting as a new post??

My question is... has anyone ever used liguid foam from a spray can to fill aluminum or carbon shafts?  If so what effect on noise? shaft weight? and spine?

It was surmised in the other post that the hollow shafts may itensify or amplify noise and this got me thinking        

If this has been tried?  Please enlighten this old man with your findings.....  

[lpcjon2]

I don't think it will work the shaft may not flex the way it supposed to,and it may make it to heavy.I asked a similar ? weeks ago.

[L. E. Carroll]

My thought is it "Could" still be loaded "Point heavy" for increased foc and then filled with the foam to get a quieter arrow with a bit more weight??? Just not sure about the effect on spine?

Anyone???

Gene  

[ronp]

Hmmm, never thought of it.  But it may be a weigh (pun intended) to load up the point end a little.  It might be worth playing around with.  I have beeen shooting mostly 1916 and 2016 aluminums.  I did try using some expanding gorrila glue for inserts, hoping that it would expand behind the insert and add a little weight, but a lot came out of the shaft and pretty much made a mess.  It stuck to my window sill where I had it drying.  Didn't go over too well...

[MR BILL SHORTY]

I TOOK THE INSERT OUT AND PUSHED THE ARROW THREW THE FOAM IT WAS THE CRUNCHE KIND DID IT A FEW TIME THEN PUT THE INSERT BACK LITTEL QUIETER    
SHOT THE SAME FOR ME

[frank bullitt]

Gene, there was an article in TBH years back, similar to that.
The gentleman used aluminum shafts and poked into blocks of foam until the shaft was full. The foam was like used in the quiver hood.

Have at it, and let us know what you find!

[lpcjon2]

Gene, I would do what Frank said the expansion foam can get big gaps in it and not be equal,but pushing it into foam blocks would make it even.

[far rider]

Well, try it, but my guess knowing how it works, is that you can't control how far into the tube you fill without a plug of some sort, and it will definitely effect spine. It has a pretty rigid set, even though it is extremely light for it's density. Now if you had a way to control how far you filled, and could predict the effects of stiffness, you could in theory buy under spined arrows, and add the foam to gain a proper spine and weight. Sounds like you will be doing a lot of experimenting, or talking to the manufacturer of the product and more over the little guy in the dark back room with the pocket protector. They may can provide you with a mathmatical basis to predict how the substance will act. They would probably hit hard though, kinda like a corked bat!

I am curious now, let us know how it works.

[L. E. Carroll]

My thought was to fill it completely  from the front [using a tube like on WD/40 and shooting it thru the adapter until it came out the nock end.  

I usually load my arrows with 75 and 100gn steel screw in inserts and using either 130 grn No Mercy/with 100 gn adapters or 160 grizly with 75gn adapters.

The majority of my bows are at the least, cut to center so not sure what effect a stiffer spine would have?

Gene  

[Fletcher]

If you use the spray foam, you are going to have to do it in stages.  The foam requires air to set and if you fill the tube, the ends will harden and seal before the inner liquid can react, expand and set.

Filling the tube with packing foam is pretty easy and works.  It will quiet the shaft, add a bit of weight, but will not affect static spine.

[bowmaster12]

i wouldnt spray it in the foam expands alot and may put to much preasure on the carbon shafts weakening the carbon and may damage the shaft causing itto be unsafe.  I would use alread harden foam and put in shaft laike stated earlier

[L. E. Carroll]

thanks guys... I did not consider the "curing" aspect      

[TooManyHobbies]

Try it on a bent shaft, that is already garbage. Fill it up, wait a day (it should cure within 30 mins. in the open). When you think it's cured, break the arrow in half and see if the inside dried. That would get you started. I doubt it expands enough to break any arrow, but you will know that also.

If it works to your satisfaction, fill a good shaft, and continue with your experiment.