Tuning a regulated gun?
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Topic: Tuning a regulated gun? (Read 13553 times))
thespardian
Shooter
Posts: 63
yes
Re: Tuning a regulated gun?
«
Reply #20 on:
August 25, 2015, 03:49:49 AM »
Thanks for the prompt reply
Pardon me for the stupid questions. But i know only one authentic person over here who can patiently answer my stupid questions.
I am still unable to understand from where to start?
At a given setpoint pressure, i should reduce the preload on hammer spring (1 turn out) and plot the chrono value in the chart. Also determine the efficiency for this setting and put it in the chart. The further reduce the preload on the hammer spring (2 turn out) and plot the chrono value in the chart along with the efficient for this setting and so on.
Where the blue and red line intersect each other will be the maximum efficient point for the given set point pressure, preload on hammer spring and port size. Am i right?
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rsterne
Member 2000+fps Club
Bob and Lloyd
GTA Senior Contributor
Posts: 26960
GTA Forums Person of the Year 2017
Real Name: Bob
Re: Tuning a regulated gun?
«
Reply #21 on:
August 25, 2015, 01:53:25 PM »
The procedure you mentioned is correct.... However, the intersection of the two lines really has nothing to do with it (if you change scales, it will change).... You don't even need to plot the efficiency, as there isn't a lot you can do about it anyway.... If you select the velocity where the transition is occurring from the plateau (on the left) to the downslope (on the right), that is the best combination of power and efficiency for that combination of setpoint and porting.... I call this the "knee" of the curve, and it is where I tune all my regulated guns.... If I need more power, I increase the setpoint (or open the ports) and do it again.... If I want less power and more shots, I decrease the pressure (or I may restrict the ports) and repeat to find the new knee....
Bob
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Coalmont, BC, Canada
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thespardian
Shooter
Posts: 63
yes
Re: Tuning a regulated gun?
«
Reply #22 on:
August 26, 2015, 02:36:08 AM »
You explain it in the way so that i can understand and also answered my followup questions which i have not asked yet.
Good teachers tells but best teachers explain. Best teachers are rear. They are more knowledgeable, tolerant, enthusiastic and kind. You are one of them.
Bundle of thanks for the guidance. Answering the stupid questions of an ignorant person require a lot of patience, especially when you are explaining an important point to those who have already some knowledge about it.
One again thanks for taking time, for the strength of knowledge you gave me and the patience.
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Tuning a regulated gun?