Taras,
I have just finished moving from Houston to San Antonio so my files are packed but in general:
I build a one piece 60 inch recurve with rather narrow limbs and fairly aggressive recurves. This gives me a recurve that weighs about 20 ounces has long working limbs due to the 18 inch riser, is smooth drawing out to about 31 inches and shoots a 675 grain arrow at about 190 feet per second.
In order to do this with the narrow limbs, it requires a thicker core than your typical recurve. My wood to glass ratio averages about.44 glass to wood. In a typical 60 pound bow, this would be
2 each.040 clear glass laminations for facing and backing
2 each.120 actionwood laminations with.002 tapers
1 each.030 colored coretuff lamination between the wood cores
(I use this coretuff to provide dimensional stability due
to my narrow limbs and since I shoot fastflight strings)
for a total thickness of.350 at the butts. On my form with the 18 inch riser, this works out to about.330 inch thickness at the fadeouts and.250 thickness at the nocks. My limbs are only 1.125 inch wide at the fadeouts and are only.6 inch wide at the nocks. I use a straight taper from the fadeouts to the nocks.
On a typical recurve with limbs that are 1.5 to 1.75 wide at the fadeouts, the wood laminations may only total to.120 to.150 inch thick.
Lots of luck and don't hesitate to e-mail if you have questions.
Mike —--------А здесь мне советуют, где достать ламинат: ___________________________________________________________________________
Hi, All! At last I've made my bow. But what i am upset about is my limbs are too weak. The bow is 49" long. Each limb is 21" long, 1.25" wide at the riser and about 0,6" at the nocks. I used straight taper. Each limb has the same width all the way — 0,173" (4.4 mm)- 4 layers of ash wood (0.6 mm) and 2 layers of fiberglass (1 mm). They have fair recurves at the ends. The limbs were kept in a heating box with 2 lamps inside at 70 degrees of C. The bow has a drawing weight equal 12.1 lb. I remember quite exactly that sport 39lb bows (when i shot from a bow being a sportsman) have similarly the same limb theckness. I think the problem is in fiberglass — i have fiberglass that used in radio industry for making circuit boards like inside computers (glass cloth soaked with resin and pressed). I couldn't get any glass with fibers going straight in one direction. Any ideas? Besides i'm interested in method of seting limbs on the wooden gripe of the bow (i used 2 bolts clamping the limb and the gripe together).
