Indians For Guns

The topic came from "Scope help" post by R-Dhillon.

I was wondering, if one can change the main spring that will boost power? How much it is true? And how long it is true?

Can one get a specific velocity for 1000 shots just by placing a very hard spring?

I am looking answer from them who really did R&D on this subject.

-Tirtha

Tirtha,

You can and should boost power in some cases to make the airgun perform at its optimum power level, provided no state or country laws are broken.

For example, many of the spring piston air-rifles sold in the U.K. and Germany were/are designed for higher powers but are sold at lower power limits to those without the necessary 'licence' for a higher power airgun.

Having said that some airguns were designed with smaller swept volumes and a main-spring producing even 12 ft.lbs. at the muzzle would be deemed to be bad for the airgun.

Mack The Knife, I agree, that boosting power is possible by utilizing the max swept volumes using various methods.

My question was specific to changing the Main spring.

?

The main-spring is the main component for boosting power. What did you think I was refering to?

Mack The Knife Bana";p="57703 wrote: ?

The main-spring is the main component for boosting power. What did you think I was refering to?

... maybe the speed of depressing the trigger...

Mack The Knife Bana";p="57703 wrote:?

The main-spring is the main component for boosting power. What did you think I was refering to?

Well, in that case if I am able to put a Webley Patriot spring, I should be able to get the similar power?

Well, in that case if I am able to put a Webley Patriot spring, I should be able to get the similar power?

Not necessarily. Assuming the main-spring does not get spring bound after you shoe-horn it in, it will all depend on the swept volume of that particular airgun.

Mack The Knife Bana";p="57747 wrote:

Well, in that case if I am able to put a Webley Patriot spring, I should be able to get the similar power?

Not necessarily. Assuming the main-spring does not get spring bound after you shoe-horn it in, it will all depend on the swept volume of that particular airgun.

Assuming, I have two gun having same swept volume. But One is having narrow ID and long tube and another is having bigger ID and small tube. should I get same power from both?

If the spring fits and does not get coil bound, you should.

I have a reason to believe, it is not as easy to get as we say.

Keeping the same swept volume, main spring with different tube specification you will get different power in two different gun. I will try to get you physics behind it.

Anyway, what I will speak about will be the theory. I was thinking, if anyone or did you ever tried and archived the power specified by the spring?

I have a reason to believe, it is not as easy to get as we say.

Keeping the same swept volume, main spring with different tube specification you will get different power in two different gun. I will try to get you physics behind it.

That may well be the case because I was speaking theoretically. What exactly do you mean by, "main spring with different tube specification"?

Anyway, what I will speak about will be the theory. I was thinking, if anyone or did you ever tried and archived the power specified by the spring?

Not me. I stick to Venom / V-Mach components at power levels they think are best suited for the air-rifle.

Check out this link...Look for "Springtime" Its a two part article that you will find interesting.

http://www.pyramydair.com/blog/archive/ ... chive.html

Manish

Mr.tirths,
I got a John Knibbs spring installed in my IHP...It was actually made to fit BSA Airsporter/Jackal Woodsman/Prospot mod 35/RWS Firebird/Hw77/HW99...
But I found it to be a bit shorter that the IHP or G.Smith spring. Then I took some useful advice from the "Mr. Know it all Mack The Knife"try resident air gun lord (Thnx a bunch) and told my gunsmith to drop in a few extra washers and it worked.
The interesting thing is that before dropping the washers, my rifle used to shoot a pellet thru n thru a one n half inches thick piece of soft white wood but ever since I put in more washers, the power reduced a bit, the penetration got reduced to 1 inch. But the recoil and accuracy got better.
The cover of the spring does not make a claim of any muzzel energy but states clearly that "Fitting this mainspring will take your weapon over the legal limit" which is about 12ftlbs in UK.
Havent got an chrony to measure it but it's powerful enough for me and my rifle.
Personally I dont see a point in getting a very powerful air rifle. One can always purchase a good bolt action .22 rifle.
Regards,
R.Dhillon.

hi,

i have seen the reply by R.Dhillon so i can improve the power of my ihp 35 by replacing the spring right, so can someone suggest me the correct spring i can use to improve the power of my Ag.

thank you

Hi Chaitu: try the gsmith spring and washer for your IHP for starters. It should be available in your town or directly from gsmith, Poona. Check out the threads.

Ashok