What is the Jet Method

kenshireen

Professional
I have seen this referenced but do not understand what it is? also the "mini" jet.
Do pro really use this method of stringing for better pocketing?
 

kenshireen

Professional
OK I read the thread that is 5 years old..
Based upon the following example that was given..
Can someone tell me what tension to string X 19 at.
What happens to X 18

Cross
C1-3 at 48 reference +4
C4-17 at 42 reference -2
Now string 20 at 48 reference +4
Go back to 19 and String at 48 reference +4
tie off 3rd from bottom



From what I see.... you pull X 17 and then skip 18 and 19 and thread 20 and pull 20...
Then you go back to 19 and pull. But what do you do with X18 (tie off 3rd from bottom).
Do you pull 18 or just leave it with no cross...
It's a bit confusing
 

Irvin

Talk Tennis Guru
All the outer strings (2 outer mains on left, 2 outer mains on right, top three crosses, and the bottom two crosses are strung at reference +4. Your reading for a 19 main racket for a 20 main racket crosses from 4-18 are tensioned at reference -2.
 

Irvin

Talk Tennis Guru
Be very careful if you're not an experienced stringer. If you're stringing an 18x20 racket chances are you mains skip 8&10T or 9T. If they skip 9T your fine is they skip 8&10 and you tie off 7 you will have two strings blocking the bottom cross. That's not as bad using a poly string but with a softer string it can really cause problems. If you happen to be string an 18x20 with CAP grommets and soft string may the tennis gods have mercy on your soul. LOL
 

kenshireen

Professional
All the outer strings (2 outer mains on left, 2 outer mains on right, top three crosses, and the bottom two crosses are strung at reference +4. Your reading for a 19 main racket for a 20 main racket crosses from 4-18 are tensioned at reference -2.

Help me on this one

My racket is 18X19. (I normally skip 8 and 10.) The instructions say to "fill in 8"... what does this mean... I thought I am skipping 8 so what does fill in mean? It appears that I do 1-7 then go to 9 and then back to 8
In regard to the crosses it says to skip the next to last cross and then come back to it... does that mean that I string 17 then go to 19 and back to 18.
It is somewhat confusing


1. String first four center mains on each side at reference tension. got it
2. Next 2 (on 16 mains) or 3 (on 18 mains) reduce tension by 4 pounds. got it
3. On a 16 main pattern after pulling main #6 skip over to #8. Increase tension 4 pounds (to reference tension) before tensioning. (#8 will be pulled at reference tension). On an 18 main pattern after pulling #7 skip over to #9. Increase tension 4 pounds before tensioning. ???
4. Fill-in main #7 (on a 16 main or #8 on an 18 main) which will be the last main. Adjust tension by adding an additional 4 pounds (reference plus 4.)????
5. Tie off on main #6 (16 main) or #7 (18 main).
CROSS STRINGS :
1. IMPORTANT: Each cross string must be held under tension at least 20 seconds before clamping off. We recommend weaving the next cross while the previous one remains under tension.
2. Start first three cross strings and tension at same tension as final mains. (+4 over reference tension)
3. After installing 3rd cross string, reduce tension 6 pounds and install the rest of the cross strings (This will be reference – 2)
4. After stringing 3rd last cross, loop over and weave final cross. Increase tension +6 pounds. do you go from 17 to 19 and then back to 18
5. For last cross string fill in second from bottom. Tie off on 3rd from bottom. So i am tying off after I string cross #18
 

Irvin

Talk Tennis Guru

Help me on this one

My racket is 18X19. (I normally skip 8 and 10.) The instructions say to "fill in 8"... what does this mean... I thought I am skipping 8 so what does fill in mean? It appears that I do 1-7 then go to 9 and then back to 8
In regard to the crosses it says to skip the next to last cross and then come back to it... does that mean that I string 17 then go to 19 and back to 18.
It is somewhat confusing
They want you to do a Yonex loop. String 1-7 then 9 and then 8. If you don't fill in 8 you may have a problem getting the string past the loop of string from 7th main to 9th main on the outside of the frame. I use a path finder awl for ease of stringing. I insert the awl from outside to inside on grommet 9, route the string from grommet 7 to 11 outisde the frame under the awl. I want to keep that loop of string on the bottom of all strings to help prevent crossovers. Then tension the 9th main. I then run in 8th main and insert it in the pathfinder awl. Pulling the awl out then takes the string right past the loop.

When they say fill in the 8th main they want you to get the 8th main past the loop. But then unless your string is extra long you must use a starting clamp as a bridge to tension the 9th main. I will Tension the 8th mains and hold them with two starting clamps. If you don't when you tie off the mains you have the bottom cross grommets blocked with two strings.
 

kenshireen

Professional
They want you to do a Yonex loop. String 1-7 then 9 and then 8. If you don't fill in 8 you may have a problem getting the string past the loop of string from 7th main to 9th main on the outside of the frame. I use a path finder awl for ease of stringing. I insert the awl from outside to inside on grommet 9, route the string from grommet 7 to 11 outisde the frame under the awl. I want to keep that loop of string on the bottom of all strings to help prevent crossovers. Then tension the 9th main. I then run in 8th main and insert it in the pathfinder awl. Pulling the awl out then takes the string right past the loop.

When they say fill in the 8th main they want you to get the 8th main past the loop. But then unless your string is extra long you must use a starting clamp as a bridge to tension the 9th main. I will Tension the 8th mains and hold them with two starting clamps. If you don't when you tie off the mains you have the bottom cross grommets blocked with two strings.
I live in Kennesaw.. can you shoot me your email...kschw9883@gmail.com
Still a bit confused.... Do i actually string the 8th main (meaning the 8th grommet)
 

Irvin

Talk Tennis Guru
I live in Kennesaw.. can you shoot me your email...kschw9883@gmail.com
Still a bit confused.... Do i actually string the 8th main (meaning the 8th grommet)
I'm working from an iPad now and that email address with "email..." in the front causes me not to be able to send. And hard to edit. I can try on my PC tomorrow.

The 8th grommet is for the bottom cross assuming your mains end at throat.) That will be the next to the last string you run or the 19th cross. Last cross being the 18th cross in grommet 10T.
 

kenshireen

Professional
I'm working from an iPad now and that email address with "email..." in the front causes me not to be able to send. And hard to edit. I can try on my PC tomorrow.

The 8th grommet is for the bottom cross assuming your mains end at throat.) That will be the next to the last string you run or the 19th cross. Last cross being the 18th cross in grommet 10T.

I understand this.
But...my mains will be 1-7,9 and ?. Do I string 11 which will give me 9 mains.
Still not clear on getting the 8th main past the hoop... I will not be stringing a main in the 8th grommet...still not clear what "fill in" the 8th grommet means...
I know when I start my X's from the top that the 8th grommet will be the first cross from the top and the last at the bottom.

My email is kschw9883@gmail.com. I am also retired
 

Irvin

Talk Tennis Guru
For an 18x19 racket:

Hold tension on all the mains for 5 seconds. This will stretch the string longer. If you have a lockout type machine slowly tension string and wait 5 seconds after lock then tension again before clamping the string.

String the first 4 mains on each side at reference tension (RF)
String the next 3 mains on each side at RF -4 (For a 16 main racket this would only be 2 mains on each side)
String the 9th main on each side at RF
String the 8th main on each side at RF +4

Hold tension on all crosses for at least 20 seconds before clamping. Again if your have a LO machine I would tension, wait 5 seconds tension again, and after another 15 seconds tension again before clamping.

String the top three crosses at RF +4
String crosses 4-17 at RF -6 (if you have more or less than 19 total cross this number varies accordingly)
String the bottom cross at RF +4
String next to bottom cross at RF +4

EDIT: The JET Method was designed for electronic constant pull machines and fixed clamps. Using flying clamps, drop weight stringers, or lick out machines may produce different results. That why I suggested extra pulls on a LO machine.

The forerunner to the JET Method was the JayCee method of stringing. That method was very similar and suggested using a String Meter to test the tension on your strings. If you have a use a String Meter and find you ties of string dropping below the RF tension you may want to adjust the tension on the tie off for your particular situation.
 
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cluckcluck

Hall of Fame
EDIT: The JET Method was designed for electronic constant pull machines and fixed clamps. Using flying clamps, drop weight stringers, or lick out machines may produce different results. That why I suggested extra pulls on a LO machine.

The forerunner to the JET Method was the JayCee method of stringing. That method was very similar and suggested using a String Meter to test the tension on your strings. If you have a use a String Meter and find you ties of string dropping below the RF tension you may want to adjust the tension on the tie off for your particular situation.
Incorrect, the JET method was designed for constant pull drop-weight (like Stringway ML machines) with flying clamps. The dropweight was intentional so that a stringer could "block" the tension bar when distributing tension from 8th main to 9th main (or 7th main to 8th main on 16x19). This can't be done with an electronic machine.
 

Irvin

Talk Tennis Guru
Incorrect, the JET method was designed for constant pull drop-weight (like Stringway ML machines) with flying clamps. The dropweight was intentional so that a stringer could "block" the tension bar when distributing tension from 8th main to 9th main (or 7th main to 8th main on 16x19). This can't be done with an electronic machine.
Hummm? Is that so? If that's true what does the US Distributor for L-TEC strings that advocates say it was designed for electronic constant pull machines and suggests using the slowest speed setting if available.

EDIT: Also down at the bottom it says the ML100 or ML120 is recommended but it was designed for eCP.

EDIT: A direct quote from the top of the page, "Many of our blog followers are likely aware that Tennis Warehouse has picked up L-TEC Premium strings to make available to internet customers. The purpose of today’s blog entry is to give those who are purchasing L-TEC strings online the means to string them so that they can achieve the best possible results. Toward this end we are proud to present the JET Method of stringing for constant pull stringing machines using fixed clamps."

EDIT: Another quote from the center of the page, "This presentation of the JET Method is intended for stringers using an electronic constant pull stringing machine with fixed clamps."
 
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Jerry Seinfeld

Professional
The JET Method was originally conceived and designed for the Stringway stringer with flying clamps. The blog post was explaining how to use the JET method if you are using fixed clamps on an electronic constant pull machine since this is a far more common setup for professional stringers.
 
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