Traditional Crossbow - BP style prod

[teagus]

It's time to do it.

Wrap form with shrinkwrap (stuff used for wrapping goods on pallets).



See the "1-10" scale? 4 (2 + 2) was perfect for 2 glass 3 lams and riser.



record the event.



glue-up. Sorry, no bow snot allowed on my good camera. Use your imagination.



This was not easy. Need to re-think a pin concept.



Hog-tied and ready for the hose. Second wrap and pressure strips. Did not have a one-piece 1 3/4" long enough so I used two for the td forms.

[teagus]

Slow air-up to 72lbs. Too much? Too little?



In the oven. Out at 8:30 EST.

[teagus]

[Kirkll]

Excellent teagus! i gotta get my hand on the plans for one of these things now... this is too cool!

[teagus]

I started taking a look at the Ben Pearson prod and decided I needed that laser. I covered it with masking tape and marked centers at the string grooves. With the laser running, I aligned the marks at each end with the beam. Next, I marked the beam at the center. I found out the center line is offset. My current prod is offset also. This is cool that Ben had the same ideas I did. The offset centerline has to do with minimizing string drag while keeping the weight up. I will now true up one side of my blank to be the top. I will come down 3/4" (1 3/4" wide) and laser a centerline. Next, I plan to make a template of one half of the back side of the Ben Pearson prod including string grooves and centerline marks. Next, transfer the pattern to my prod blank.

[teagus]

Template time. Bottom of the cut-out meets the centerline. Just realized the cut-out is the prod sight window. Distance from centerline to string groove is 18 1/8".

[teagus]

Trim limb with that blade BK uses. 24t x 7 1/4. No more ruined band saw blades. Thanks Sir.



A little time on the large spindle sander. Looking bettter by the minute.



SIght window on the small spindle sander. Sander came from a retired bowyer by the name of Reedy who belonged to Chieftans Archery Club.



Need to rough in string grooves and drill the mounting hole through the riser.

[teagus]

I was reading "Arrow Trade" mag. May issue had a story on Bear Archery and showed this technique for holding recurve limbs. Worked great.



This operation should be performed before shaping the limbs. It's a perp thing.



First stress test. Prod passed. I was stressed.



21" long bolts. 11/32 125 gr. 3" fletch.



15 yards




2 shots - test over. Note penetration. Kirk, I just lost some weight recently. Hold off on that shirt. I might be looking at a XL.

[teagus]

Tip overlays, finish sanding limbs, then weigh power stroke on old bow scale. Just put in order for new digital scale. Should be here by Tuesday. Thinking of a fixture to hold the prod and weigh one limb at a time to balance.

[teagus]

Could not wait for digital scale. 10 3/4" power stroke. I think the string could be shorter - 10 1/2" ps. Do not know the original BP string length.





Next prod will have a .040 parallel. Increase .010".