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Math boys and Nerds please advise

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Math boys and Nerds please advise Empty Math boys and Nerds please advise

Post by inthebeech 3/22/2022, 5:03 pm

Has any one ever done the math of moments in actual design software (ACAD, Solidworks...) to determine what is the trigger movement distance for each mil of hammer/sear engagement?  Formula please? Or if you have the model of the required components and are willing to send me the file (in iges or step)
Thanks,
Ed
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Post by james r chapman 3/22/2022, 5:12 pm

You need to talk to Doug Hall. 
He’s already done the leg work
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Post by Wobbley 3/22/2022, 7:00 pm

That number is VERY geometry (pistol design) dependent.  It could be done I suppose.  But it would likely be quicker to put a dial indicator on the trigger as it was pulled.
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Post by chiz1180 3/22/2022, 7:52 pm

What are you trying to figure out? Outside of frame measurements, hammer and sear interaction geometry also plays a big part.
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Post by Jon Eulette 3/22/2022, 8:15 pm

Boy that’ll be tough to be accurate. Generalities be simple, but the reality of sear length and hammer hook engagement is all over the place. Sear can be true radius of varying lengths, and primary sear engagement depth as well as secondary angle.  Then hammer full cock engagement length. Is hammer positive or negative deflection? How tight does the disconnector fit into the hole at the top of the receiver? Does it move forward when trigger pressure is applied? What about frictional forces from all the parts? Knowing all this it’s way beyond my engineering skills. Actually I’m not that motivated to try and figure it out Smile
Let us know how it goes?
Jon
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