Ganeshn,ganeshn wrote:TCing and Engine tuning.
300 gmsBig Daddy wrote: GNV,
what is the weight of the piston?
BD
The transfer port is straight and not angled. In PH also it is straight. But long long ago I read that angled transfer ports are more efficient. But tampering with transfer ports is a delicate process and one needs to know very well what he is doing and how to do it, I think. If one makes a mistake it would be irreversible I think. But transfer port modifications is an important one to fine tune an air rifle.But I would not tamper with them unless I am willing to junk the gun if I fail.GNV wrote:300 gmsBig Daddy wrote: GNV,
what is the weight of the piston?
BD
Sounds great, Happy Diwali to You all the IFG'nsaadhaulya wrote:Ganeshn,ganeshn wrote:TCing and Engine tuning.
I can share the details of Turbocharging and Tuning. Both are very interesting subjects but I will have to start a different thread for that, as I can't hijack this thread.
I will try to create a writeup on these topics that may easily be understood by non automobile related persons also.
Atul
These guys have done what can be reasonably expected of an Indian AR manufacturer to reduce friction. They've added a rear seal to the piston to reduce friction instead of nylon bearings which they said they couldn't do in production. Can the seniors pls elaborate on the various factors that come into play in fine tuning a gun?Big Daddy wrote:One of the most common mistakes, if not the most common mistake made is the assumption that a larger spring produces more power. It's a very delicate balance between various moving parts of the gun, their dimensions and weight. A lighter spring that is better balanced WILL produce more power than a big bully spring.
The first step to making a gun better is to look in to reducing friction between moving parts. Transfer port length, Transfer port diameter, piston weight...etc play a major role.
main13 wrote:
These guys have done what can be reasonably expected of an Indian AR manufacturer to reduce friction. They've added a rear seal to the piston to reduce friction instead of nylon bearings which they said they couldn't do in production. Also, now the tech guy says he's had his Eureka moment & has isolated the problem..But calls it a 'trade secret' & says will update in production run models only...
Yes sir! They will sell you the updated components. If they don't Warrior Buddha loves "chewing off brains"...GNV wrote:So we are the Guinea Pigs to try their prototypes on
There would be no secrets once the new gun is opened. Or are they welding the end cap to the receiver tube and want us to inject hydraulic fluid through the cocking slot to lubricate the gun
It is not a seal. Just a rear bearing.
Are they willing to sell the updated parts to the early Guinea Pigs?
GNV
May I ask what is the 'hurry' about?Maheshzarkar wrote:Hi all
I am a naive..as compared to all you gun enthusiasts. But I liked Hurricane Mod 15. ..and it would be my first AR. Should I go ahead and buy it...as I have also read some reviews about new licence laws which will take AR also into its ambit....In such a case I need to buy in a hurry...seniors..Please advise. ..
Yup! About time too sir...GNV wrote:Wanted to do post lubrication accuracy and chronograph tests today. But the sky is heavily clouded and light is so low that chrony is not registering the shots. Hurricane in Bay of Bengal prevented testing the Hurricane
Have you considered taking out the action & fitting it into a new stock?! If cocking effort is not a problem then a bigger .142" spring & custom guides could be added as well.So since the stock of the Hurricane AR is already ugly and nothing I do would make it look any worse, I decided to see if I could make it more convenient for me to use utilizing my limited wood working skills. Have a few pieces of teak wood. So using a saw, Dremel Moto Tool, an Xacto Craft Knife set and Sanding Bars managed to make a Spacer to increase center pull length, Cheek Piece and a Pistol Grip attachment as shown in the photos. Filled the hollow butt with wood blocks so that cheek piece fitting screws will have solid anchor places and fitted the Spacer and cheek Piece in place. The pistol grip piece needs more shaping and sanding.
These guys told me they've added nylon inserts to prevent the scratching. Any idea why they couldn't simply file off the extra metal?!When I removed the action from the stock I found that a protrusion on the cocking lever is cutting a deep groove in the receiver tube as shown.
Filed the protrusion flat which also removed the ceramic coating in that area.
main13 wrote:Yes sir! They will sell you the updated components. If they don't Warrior Buddha loves"chewing off brains"1...GNV wrote:So we are the Guinea Pigs to try their prototypes on
There would be no secrets once the new gun is opened. Or are they welding the end cap to the receiver tube and want us to inject hydraulic fluid through the cocking slot to lubricate the gun
It is not a seal. Just a rear bearing.
Are they willing to sell the updated parts to the early Guinea Pigs?
GNV
Pls wait for their production models in a month so you can buy the refined stuff.. Or would commercially available Diana 48 tune kits would do?!
Somehow I doubt he has 'isolated' it.. Pours hydraulic oil into compression chamber & claims to 'isolate' the problem.. Yet not once said he, fixed the misaligned guide, he has...
Technically speaking, dieseling can be introduced be lubing the pellets.. Or a drop into the skirt... Would that still affect the gun's powerplant? Somehow I don't quite like the idea of dieseling, don't know why...2
He also said that the transfer port is 20mm long (step type). Said he wanted to reduce it to 10mm & use the extra for the stroke..I suggested he use it to 'cone inwards' to avoid piston banging with light pellets...
What would be the advaadvantage of step type vs venturi type?3
What spring would you suggest to replace its stock spring with.. Diana 48, .128"?!
Upset you seem with me! Chew your brain I wouldn't, a vegetarian I am!ganeshn wrote: 1 - not sure whose brains you are chewing.
2 - then why bother about Dieseling, unless you want to constantly enlighten Aarmar techie.
2,3 - stop playing the guru and a shishya in the same line.
GNV,GNV wrote: So since the stock of the Hurricane AR is already ugly and nothing I do would make it look any worse, I decided to see if I could make it more convenient for me to use utilizing my limited wood working skills. Have a few pieces of teak wood. So using a saw, Dremel Moto Tool, an Xacto Craft Knife set and Sanding Bars managed to make a Spacer to increase center pull length, Cheek Piece and a Pistol Grip attachment as shown in the photos. Filled the hollow butt with wood blocks so that cheek piece fitting screws will have solid anchor places and fitted the Spacer and cheek Piece in place. The pistol grip piece needs more shaping and sanding.
