Indians For Guns

Any ideas or gyan on how to shorten lock time on a springer ? Thanks.....

M.

http://www.network54.com/Forum/184474/t ... +ignorance

scroll down to the post by Hector M...that guy is good.....both on gyan and implementation.

Thanks a lot. I have interacted with HM in the past. Short stroking....hmm........time to go and talk to the machinist........

fantumfan2003 wrote:Any ideas or gyan on how to shorten lock time on a springer ? Thanks.....
M.

Hi fantumfan,

> This is a $64 question
> While there are many links on this subject, I'm afraid 'none' explains this enigma with any clarity...
> In all humility I submit my learning & experience for what it's worth!

By definition "Lock Time" is the duration / time taken for the pellet to exit the barrel when the sear is released / dis-engaged.
Now having said that - what are the factors that play to determine this?
The answer to this is nothing but the interplay of the principles of Physics & Mechanical Engineering.
Consider this...
1. The state of the receiver - its uniform ID from top to bottom, its internal surface condition, it being perfectly linear all through...
2. The size of the transfer port and its position & alignment with the breech...
3. The condition of rifling of the barrel / the dimensions of its pitch & landing / its canting / the finish of its crown
4. The fitment of seal / its resilience
5. The size & weight of the piston / its eccentricity / finish
6. The length of the piston rod
7. The shape, finish, surface of the sear
8. Trigger pressure / condition of the its sear / angle of contact with the piston rod's sear
9. The metallurgical composition of the spring, its length, ID & OD, thickness of wire, its resilience as a result of tempering & annealing
10. The size of the rear guide & top hat
11. Swept volume
> Well, now if each of these parameters have to work in unison / synch to negate any friction - Only then will the "LOCK TIME" be determined - which could me 'Milliseconds" - I wonder if any one has clocked this "Time-frame" with any modicum of precision!!!
> BTW - I wonder if there are any 'Benchmarks' or Standardization regarding this?
> In my considered opinion there exists a co-relation between 'Accuracy & Lock-time' - and these are inter-dependent.
> In the final analysis if all the above 11 parameters are taken care of to the maximum possible perfection - It could result in the "Lowest Lock Time"!!!
> Hence attempting to go about reducing the enigmatic Lock Time by piece meal surgery will be an exercise in futility.
> Everything has to start with the proverbial "Drawing Board", application of the laws of physics + precision mechanical engineering, using the right metallurgical components, critically immaculate assembly, use of the correct lubes....
> All said & done even the size / shape & weight of the pellet could play a minor role...
> While Lock Time is of lesser importance to Sports Shooters - It's critical to Match / Competition Shooters.
> Well as I said earlier - This is my take on the subject - Now let's hear what others have to say.
> Am eager to know & learn...
Briha

Brihaji,

Locktime is indeed in milliseconds and the improvement achieved could even be miniscule but it IS perceptible.
I have achived considerable gains with locktime with my IHP 35
But this time round I am working on one of the HW underlevers as a GINB Custom FT stock is bagged for it.
Thus the quest for perfection.
We will discuss this in detail in person.

M.

fantumfan2003 wrote:Brihaji,

Locktime is indeed in milliseconds and the improvement achieved could even be miniscule but it IS perceptible.
I have achived considerable gains with locktime with my IHP 35
We will discuss this in detail in person.
M.

Hi fantumfan,
> I too have achieved considerable reduction in the Lock Time in my IHP35 (Super tuned - Samurai3G) Ref: my earlier post "Maha Makeover" of my IHP35.
> It was a total DIY that took several weeks but well worth every minute & moolah spent
> Like U rightly mentioned LT is perceptible more so "Palpable" to a highly sentitive shooter - An inexplicable feeling - Only to be felt & enjoyed
> YES! I look fwd to a detailed discussion on the subject
Cheers
Briha