How I made my Super Redondo ...

anirut

Legend
I just came back from testing out my Super Redondo ...

One word: "SUPERB!"

There's no more hollow or pingy feel. Just very solid and very, very stable. Hits a ton. Perfectly balanced for great hits, even with a synthetic over grip.

And there's no lead what so ever ... that's why I mentioned in another thread that I'm modifying the racket "at molecular level".

Wanna know what I did? How?

I turned my Redondo into a stick of the very early 80's. Those who have been through the period will probably remember "Foam Core" rackets of those days.

I had it done. Foam-injected. That's why this is not a DIY home job. If you have access to the facility you can try it at your own risk. My friend happen to work in the industry and I sorted out her help. (But had to drive about 80 km to get it done -- and back.)

The down side: the Redondo's now void of any and all warranty (I've never bothered about it BTW). The foam will be there forever.

My principle of this thinking is that when we add weight by using lead, we're adding weight (or mass) to specific points only. The distribution is way skewed. The problem gets worse when we add overgrips. The racket's calculated optimum balance is off. (This is true. I hit with the Redondo in stock form and it played really nice, except for feeling just a little light.)

As for any rackets, I'm sure they were designed and engineered for best performance. You can take a look at string patterns. My Redondo and Dunlop have a very, very similar head shape and size, but their string pattern designs are different, even though both are 18x20.

OK, so, my thinking was that it would be better if we could add mass evenly on "the whole" racket. And with such idea, that's what I did to my redondo and turned it into a Super Redondo.

The racket weight increased by about 4 grams only.

Disclaimer: This is a risky and expensive experiment, especially if you goof. There's no guarantee that you will get the same happy outcome as I did.

So my Dunlop Revelation Tour Series 90 as endorsed by Mark Philipoussis can now join my other rackets in their resting place ... in peace.
 

armand

Banned
You sir, are a revolutionary.

Couple questions: How much did it cost(please convert to U$ Dollars, CDN or Euro)
What insertion point was used to inject the foam?
And where exactly is the foam present within the frame?
How long did the process take?
What kinda foam? That liquid kind that expands when exposed to air?
 

BreakPoint

Bionic Poster
Wow! You are the man, anirut! ;)

I'm surprised that it only added 4 grams, though, if it was injected throughout the entire frame.
 

travlerajm

G.O.A.T.
Nice work Anirut. Did you check to see how your new balance point compares with the original balance point? That would be interesting to know.
 

anirut

Legend
I'm happy to know you find it interesting about my Super Redondo. And's here to your questions:

-- How much did it cost?
I just paid the guy who did it 200 Thai baht (US$ 5) in appreciation (as my friend's his supervisor). There was no cost for the foam (stolen stuff you can call it). Oh, and the cost of gas to drive to the factory and back ... 160 Km. (about 100 miles), plus the highway tolls ...

-- What kind of foam?
It's heat insulation foam as used in refrigerators.

-- The insertion point and where's the injected foam in the frame:
Just remove the grip then the butt and you will see hollow void of the racket. Into that void the foam was injected. The foam is now permanently fixed inside the frame tube.

-- How long did it take?
The injection process was a couple of seconds. Cleaning up the mess took a little longer.

-- Did it decrease vibration?
Yes, a lot. Almost totally absorbed. I framed my serve and there was no shock was so ever. Just only a strong thud. You can feel your shots when you play, though. My cousin, who always have to use a dampener with any racket, tested out my Super R and found it really dampened without those weight-adding shock-abs.

-- The balance point:
This is surprising. Eventhough I've added a 7.41 gram overgrip to the grip area, the racket balance is still very close 10 pts HL as it was designed to be. (I have yet to check the exact balance point as I've extended the racket to 27 1/8 inch.)

-- The about 4 grams of weight:
I think this is because the volume of hollow void is very small, especially for a 20 mm beam racket. The volume of racket head zone is further reduced by the grommet. And the foam itself is very light weight.

Something of caution here: the foam will certainly disintegrate over many, many hitting sessions. In-material cracks will be certain from impact shocks. I have to find methods of repair now.

The frame now feels a little stiffer. My 59 lbs tension suddenly felt a bit boardy than it originally was. (Could also be a result of dead strings.) This is probably because of the foam's resistance to racket bends.

I'll be happy to answer your inquiries. Cheers!
 

thejuice

Hall of Fame
So it's no longer a Redondo it's an ANIDONDO!!!! The jury is still out on your Redondo User's Club membership. :p
 

anirut

Legend
Hi Tomba:
Change the grommets? Don't know. Possible but difficult for sure. For all my 30 years of tennis life I've never changed any.

Hi Juice:
Let's call it the S-Rendodo instead. Anidondo sounds nice but too much too close to "any di_do".
 

Lakoste

Professional
Since you filled the entire racquet with foam, does that mean you can't add anymore weight inside the handle?
 

anirut

Legend
Hi Lakoste:
In a way, no, you can't add more weight inside the handle. Not by "conventional methods", as the foam is filled all the way. If you need to add weight inside the handle, you've got to think of work-arounds. I'm sure you can guess by now how to do it.

And I have the Wilson Sting SC mid too! The copper-brown one, though
 

dennis1188

Semi-Pro
Sounds, possible that the foam material was only injected into the handle and partially up towards the hoop. BTW the Homedepot has insulating foam in pressurized can w/applicator for DIY ;)
 

MTChong

Professional
thejuice said:
The jury is still out on your Redondo User's Club membership. :p
A part of me says... he changed the lay-up of the frame. No, you cannot be a part of the club! But then again, it is a Redondo...
 

anirut

Legend
dennis1188 said:
Sounds, possible that the foam material was only injected into the handle and partially up towards the hoop. BTW the Homedepot has insulating foam in pressurized can w/applicator for DIY ;)
I'm not so sure about this if the foam ended somewhere at the shoulder or not. Will probably have to give it time until some part of the foam begin to brake off into any unfilled void, then we'll hear some rattling to prove that it didn't go all the way through.

I envy you guys ... you can get it at Homedepot ... but not here where I am.
 

jonolau

Legend
anirut said:
I'm not so sure about this if the foam ended somewhere at the shoulder or not. Will probably have to give it time until some part of the foam begin to brake off into any unfilled void, then we'll hear some rattling to prove that it didn't go all the way through.

I envy you guys ... you can get it at Homedepot ... but not here where I am.
Anirut, your wife will be thankful there isn't a HomeDepot in Bangkok ... ;)
 

thejuice

Hall of Fame
MTChong said:
A part of me says... he changed the lay-up of the frame. No, you cannot be a part of the club! But then again, it is a Redondo...
Well it looks like a Redondo so I guess we can say it's an Anidondo (Anirut, it could be a d*ldo from the grip end) with a Redondo PJ.
 

anirut

Legend
Jonolau:
Even without a HomeDepot ... I can come up with creative ways to mess up the house.

Juice:
I've not thought about it. How come your realize that it could be used as a 'd' from the handle end? ... Umm ... getting suspicious ... [kiddin' of course].

------

OK, I'll think of a way to remove the foam without destroying the racket. If we know how to safely reverse the process, then ANYONE can try it (as long as you have access to HomeDepot ...) and see how your racket may change.

Any chemist around here ... please ...
 

vkartikv

Hall of Fame
Ok, a little confused here. I should probably go back and read every single post but here it is anyway: you added the foam just to the handle, correct? So in essence you are trying to achieve somewhat of a sensor-tour handle system for shock reduction? Correct me if I am wrong. Secondly, does the foam move around in the frame until it reaches a point where it has evenly distributed itself? Any shaking required after the injection process? These may seem like stupid questions but I am new to all this...
 

anirut

Legend
vkartikv said:
Ok, a little confused here. I should probably go back and read every single post but here it is anyway: you added the foam just to the handle, correct? So in essence you are trying to achieve somewhat of a sensor-tour handle system for shock reduction? Correct me if I am wrong. Secondly, does the foam move around in the frame until it reaches a point where it has evenly distributed itself? Any shaking required after the injection process? These may seem like stupid questions but I am new to all this...
The foam was filled inside the whole racket, right to the tip of the head, by high pressure.

I can confirm that it's filled to the head because I remember cleaning the leaks.
 

anirut

Legend
Court_Jester said:
Will you be able to replace the grommets after this procedure?
I'm pretty sure you can do it, but for sure you can't remove the old one by conventional methods. After all you're going to replace the grommets, you'll probably have to "destroy" the old one all together. Or there should be better ways of doing it.
 

jonolau

Legend
anirut said:
OK, I'll think of a way to remove the foam without destroying the racket. If we know how to safely reverse the process, then ANYONE can try it (as long as you have access to HomeDepot ...) and see how your racket may change.

Any chemist around here ... please ...
Anirut, the way to dissolve TDI foam is to use Methylene Chloride ... but beware, this is also an EXTREMELY EFFECTIVE paint stripper, and if you get any one your frame, there goes the paintjob. MC is also highly volatile and evaporates very quickly. You must be careful not to breathe it in and need to don breathing apparatus and protective eyewear. MC also dissolves fats/oils very well and will dry up your skin big time, so you will also need to use special protective gloves.
 

jonolau

Legend
Court_Jester said:
Will you be able to replace the grommets after this procedure?
As foam is soft (depending on its density), the grommets can be removed very easily. Anyway, as Anirut put it, you will probably not need to remove your grommets until years later when its stuffed.
 

anirut

Legend
Oh ... Methylene Chloride ... I use that a lot for my acrylic works ... man, what a corrosive solvent.

It's a very effective rat killer, too ... and too gross to describe how it worked.
 

jonolau

Legend
Yes, MC comes from the same family as chloroform, trichloroethylene and perchloroethylene, and it's primary function is a paint stripper and also used in degreasing of metal parts.

I'm seriously wondering about the rats though ... ;)
 

anirut

Legend
jonolau said:
I'm seriously wondering about the rats though ... ;)
Picture a 5-cc syringe with needle ...

BTW, any other solvent that will not kill the racket ... please ...
 
I've done the foam thing with a Wilson BLX tour with a 58 RA....took out the grommets and filled the hoop...took off the butt cap and filled the racquet shaft...…...no more vibration though the beast weighs 13 oz.... hitz a ton tho
 

d-quik

Semi-Pro
I'm so awesome with the racquet surgery I performed.
so did the foam inside end up "breaking off" and "rattling" and reducing the dampening?


Is there a way to just get it filled from hand to 3/9 instead of 12?
 
Last edited:
so did the foam inside end up "breaking off" and "rattling" and reducing the dampening?


Is there a way to just get it filled from hand to 3/9 instead of 12?
you can limit the amount you fill the racquet....however it is tricky and results are approximate...but it has worked well for me with a Head 360 radical S(2019)which was light(9.9) and I got the weight up to 11.6 and am loving it...
 
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