Riddle me This...

kennym · April 04, 2021, 01:15:36 PM

Quote from: Roy from Pa on April 04, 2021, 12:10:15 PM
Doesn't really matter, Shreddy prolly forgot he posted this thread:)

He shoulda made a note ...

Mad Max · April 04, 2021, 02:40:53 PM

C is extra that will help it form to the riser and will be cut off later

Bowjunkie · April 05, 2021, 05:23:29 AM

What Kenny said, C was changed to be flat, or nearly so, to help allow the lam to lay tight to the riser at E.

Roy from Pa · April 05, 2021, 05:46:38 AM

Looks like Rich forgot his trad gang sign on password:)

kennym · April 05, 2021, 08:14:46 AM

Quote from: Bowjunkie on April 05, 2021, 05:23:29 AM
What Kenny said, C was changed to be flat, or nearly so, to help allow the lam to lay tight to the riser at E.

I remember him telling someone having trouble with a gap to do that...

Roy from Pa · April 05, 2021, 08:22:30 AM

Doing that would give you a leverage advantage to get more pressure in that area which would help to eliminate the gap.

Shredd · April 05, 2021, 09:42:48 AM

By George... I think you guys have got it... I will write more on it later...

I wonder if one of the tech guys/engineers would be kind enough to explain exactly what is happening to the lam by putting a flat spot at the last inch of the ramp and what happens when you have a radius at the end...

Flem · April 05, 2021, 12:20:33 PM

I'm no tech guy, just a random nerd without credentials. I believe the end of the ramp is essentially a fulcrum. So a flat/square ramp would create a smaller fulcrum point putting more stress at one location on the lever, where a radiused fulcrum would potentially distribute the stress on the lever.

Pat B · April 05, 2021, 07:36:41 PM

That is the most strained part of any bow because of the leverage of the limbs. The fades are the transition between the working limb and static handle so some of the strain has to go into the fade to prevent the "small fulcrum" Flem mentioned.

Stagmitis · April 05, 2021, 08:56:41 PM

Cant wait to C what Rich has to say...

Shredd · April 06, 2021, 11:02:27 AM

Here are some drawings I did last night... I have been so busy... I will talk on them later... Or maybe some of you all could elaborate on them and explain better than I can... What's in my mind does not always come out on the keypad...

[attachment=1]
[attachment=2]
[attachment=3]

Shredd · April 06, 2021, 11:06:07 AM

There is supposed to be an arrow pushing down between the two fulcrum points on drawing 'D'...

Stagmitis · April 06, 2021, 01:55:04 PM

Not easy designing a riser for a Hill bow huh?

Longcruise · April 06, 2021, 02:43:36 PM

Quote from: Stagmitis on April 06, 2021, 01:55:04 PM
Not easy designing a riser for a Hill bow huh?

Very Very complex!!

I'm not seeing the point of this but keeping an open mind.

williwaw · April 06, 2021, 11:11:39 PM

Quote from: Longcruise on April 06, 2021, 02:43:36 PM
I'm not seeing the point of this but keeping an open mind.

Something about how it is harder to bend the end of the lam than the middle?

Stagmitis · April 07, 2021, 11:02:10 AM

Might be wrong but D looks right to me. You need an even bend throughout the riser as depicted in the drawing by extending the belly lam past the handle- If these angles are not right on a 14" steep swooped hill riser it could be catastrophic at the fades.....Don`t ask how i know that