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Traditional Crossbow - BP Hybrid Tiller

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Re: Traditional Crossbow - BP Hybrid Tiller

Postby teagus » Mon Aug 05, 2013 2:57 pm

2-burner custom propane forge $700.00
big ass propane tank
25' extension hose
Custom welded cart (needs blower mounted and electrical box)

1 set of new side plates $375. (cadd/nc programming charge included)
side plate fixture routing guide $1075.00
side plate drill fixture $950.00
bow body drilling fixture $1190.00
Axle weld fixture $325.00
drill fixture for hardened steel sear plates $575.00
30 delrin nuts plus two small tooling fixtures $2445.00
used Rockwell variable speed drill press $800.00

Currrently moving my 6 foot maple top machinists bench to the fabricators to have fixturing installed to hold body while routing side plate pockets. Two porter-cable routers purchased so I do not have to change bits during production.

Picked up honduran rosewood (three bows) and bloodwood (4 bows) at Mike Quin's last month. Looks like a first run of 30+ bows.

New knee.

Delivered 12 longbows in the last year. (with 12 bqck quivers and 12 doz POC)

Re-built spray booth turbine (new shaft and bearings)

Perfected fullerplast spray process.

30 long bow risers in process.

Building a pink bow for my daughter.
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Re: Traditional Crossbow - BP Hybrid Tiller

Postby MoeM » Sat Sep 28, 2013 2:28 am

Hi teagus, I finally made it on board (after several fake account rejects :( )
I love the mesh up of 13th century design with up to date influences like center cut prod and longer power stroke to mind the difference of a glass lam prod towards the old steel springs.
I`ve been following this topic for some month and I`m waiting for the further progress; especially the prod is interesting for me.
I`m working on a similar project- inspired by the "special needs" of a friend who lost a hand last year and isn`t able to shoot his longbow anymore...

Two questions on your nut (nut lock is the very coolest lock for crossbows anyway :) );
I can`t see the hole for the quick lock pin- usually it is behind the fingers in the middle isn`t it?!
And I wonder what is that notch in bottom front for- weight reduction?

Btw. another possibility for the contact with trigger would be to route the notch for the trigger and drill deeper in the middle the glue in a piece of steel rod with a filed in "step"; guess a picture explains it better...
http://fletchers-corner.de/download/file.php?id=43707&mode=view

hope to see you around!
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Re: Traditional Crossbow - BP Hybrid Tiller

Postby MoeM » Sat Sep 28, 2013 2:47 am

Hey teagus, cool project- watching it closely!

GZ Moe
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Re: Traditional Crossbow - BP Hybrid Tiller

Postby teagus » Mon Sep 30, 2013 10:32 am

Patience grasshopper.

If you want to chat, PM me. I know everyone is waiting for what is coming. Please do not clutter my build-a-long.

I do not want to start a traditional crossbow discussion forum via this build-a-long. There are forums like The Arbalist Guild for that. :ugeek:

An analogy would be a cell phone going off in the middle of a symphony. :roll:
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Re: Traditional Crossbow - BP Hybrid Tiller

Postby Kirkll » Sat Oct 12, 2013 7:48 pm

Considering you started this thread in Jan 2011, i have to say this is one long ass symphony, and the grass hopper died.... :lol:
http://www.bigfootbows.com/
kirk@bigfootbows.com


Only archers are fool enough to want to make a composite with natural materials and man made materials, and then bend it repeatedly...
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Re: Traditional Crossbow - BP Hybrid Tiller

Postby 4nolz » Sun Oct 13, 2013 7:24 am

More like 100 bottles of beer on the wall Grasshopper.
there are 2 dates on your marker.Your life is the dash in between.
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Re: Traditional Crossbow - BP Hybrid Tiller

Postby teagus » Sat Dec 14, 2013 10:43 pm

Hope this works. Using a S4 phone to take pictures now. No more dead camera batteries.

Side plate router bench back from machine shop.

Image

Drill press with better work surface for production drilling.

Image
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Re: Traditional Crossbow - BP Hybrid Tiller

Postby teagus » Wed Dec 25, 2013 12:36 pm

New process due to tooling I had made. Everything shown can be laid out by hand. There will be drawings made available once I sort this out.

I am now squaring up the nose (front end) before I start drilling holes.

Image

On to the "new" used drill press.

Image

Back view of the nut pocket drill fixture.

Image

Fixture is located a set distance from the nose via a stop.

Image

Top side view.

Image
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Re: Traditional Crossbow - BP Hybrid Tiller

Postby teagus » Wed Dec 25, 2013 12:55 pm

5/16 dia. (.3125) hole for the safety, through all.

Image

3 screw holes, nut axle hole, trigger axle hole, 3/16 dia. (.187), through all.

Image

Finished pattern.

Image

AS this is a work in progress, there are a few things I need to make better on this step.
The regular long drill bit works well with the drill bushings, but clogs quickly. Press is running at the slowest speed. Seems like friction between bit and bushing is causing heat. Chips are baked :shock:
Fancy expensive 6" brad point , quick chip extraction bits fit the bushing at their shank, but the fluted section jam in the bushing. :evil:
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Re: Traditional Crossbow - BP Hybrid Tiller

Postby teagus » Thu Dec 26, 2013 9:06 am

Just talked to the drill bit supplier. The problem is the brad point and the bushing. They said the high spiral is the way to go but the brad point will always want to snag in the bushing. I can send them back and they will exchange them. W.I. Fuller Co. in R.I. Great service.
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