What core materials are affected most/least by heat/cold?

[atatarpm]

Bryon Ferguson said in one of his flims that elevation changed his bow and arrow tuniing once. That much being said I have notice changes in my wood bows due to tempeture changes. The one bow that I have that does not seam care what the weather is weather hot cold or rain or sunshine is my Qarbon Nano all cabon and foam.

[**DONOTDELETE**]

My thoughts are a deeper cored bow would be subject to more change with heat/cold than a wide limbed shallow core bow.  Also, action boo has a lot of glue in it that I can understand might change in the heat.

i think you would see more variation in performance in the wider RC limb with more glass exposed to sun light. and foam cores with a white or reflective finish are the least effected by sun and high temp..... but you'd have to be an Olympic class archer shooting 90 meters to tell the difference.


   

It's real and measurable.
I didn't make this stuff up for something to talk about.

20 yd shots were about 7" right of normal...with field points.
Didn't try it with a broadhead.
Corkscrewing arrows...the setup was no longer tuned.
 

I really think you got arrow problems going there John. I know you really like the wood shafts, but you may want to try some carbon. I'd highly recommend the "Heritage" series, or the "Traditional only" shafts... they look like wood and are seriously nice arrows.

What weight are you shooting bro? I could send you a few heritage shafts to try out.


The only other thing i could think of to get those arrows showing weak like that would be the diameter of the shaft shrinking dramatically (Unlikely), or if you had a leather strike plate that shrunk in thickness....  did you try padding your strike plate out a bit?

[JimB]

OK spinetester guys.Test an arrow that has been in the air conditioned house,then later in the heat-same arrow.

[Zradix]

Thanks for the offer Kirk.
I keep thinking about carbon...too many more instances like this and I just might have to switch.
..just not ready yet..high speed cutting wheels/jigs..gluing inserts..blah..lol

I should get/make a spine tester just for fun to see what really is going on.

Now that the heat wave is over and my shooting area is back down to the mid 70's things are getting back in tune.

I'm using a med thick ( 1/16"?) self adhesive felt pad on the window. I doubt it changed.
That's a good thought about leather though in hot humid conditions.

Thanks for the help and thoughts everyone.

[Orion]

Jim B.  I have done that.  Spine changes about 3-4# on some arrows, not enough to make a difference IMO.  These are on well sealed shafts, of course.