PK Asymmetric - concept?

anirut

Legend
Can someone please explain the concept behind the PK Asymmetric?

If I understand correctly, it seems weights are arranged asymmetrically in the head area, but for what reason? I tried this out on my Redondo and it seems to work wonders, but I don't understand why. I'd like to get the physics concept before I preach this mod for people to try out.

Thanks for all explanations.

PS: I know this is a discontinued racket, but think the concept lives on.
 

rich s

Hall of Fame
IIRC the asymmetric beam profile was intended to dampen vibration/eliminate resonance in the frame.......





(2000th post)
 
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pyrokid

Hall of Fame
Asymmetric how?

Like lead at 4 and 10 instead of 2 and 10?

I'm always game to try a new mod out.
 

Kevo

Legend
It was asymmetric in it's shape. It alternated thick and thin around the perimeter of the head. I actually liked mine while I had it. It was a nice frame.
 

anirut

Legend
Asymmetric how?

Like lead at 4 and 10 instead of 2 and 10?

I'm always game to try a new mod out.
I don't know about the original PK's concept, but I placed my 0.5 gram pieces at 10:30 & 3 instead of the usual 10:30 & 1:30 and this noticably changed the way the racket played. Very quick, easily controllable.

Yes, the weights are just 0.5 gram a piece. Don't be surprised how small weights can do wonders.

It was asymmetric in it's shape. It alternated thick and thin around the perimeter of the head. I actually liked mine while I had it. It was a nice frame.
That sound likes alternate weight distribution too. Interesting.
 

cellofaan

Semi-Pro
I had one too. On one side of the head, the section is much thicker at 2 o'clock, while at the other side the thick section is around 4.

I used to play with it keeping the 2 o'clock thick part upwards.

While it was intended to reduce vibrations, I'm not sure if it is actually heavier at those thicker parts.
 

SteveI

Legend
Can someone please explain the concept behind the PK Asymmetric?

If I understand correctly, it seems weights are arranged asymmetrically in the head area, but for what reason? I tried this out on my Redondo and it seems to work wonders, but I don't understand why. I'd like to get the physics concept before I preach this mod for people to try out.

Thanks for all explanations.

PS: I know this is a discontinued racket, but think the concept lives on.

You might want to post something in the Classic racket section also. Steve Huff and Bud might also be able to add more info.

Regards,
Steve
 

Ash_Smith

Legend
It was asymmetric in it's shape. It alternated thick and thin around the perimeter of the head. I actually liked mine while I had it. It was a nice frame.
^^^ This. It wasn't the weight that was assymetric it was the beam width. Exactly like Kevo says, the frame width was different in specific parts of the frame, presumably to aid stability and increase stiffness in certain areas.

Never really got on with them myself.

Cheers

Ash
 

anirut

Legend
You might want to post something in the Classic racket section also. Steve Huff and Bud might also be able to add more info.

Regards,
Steve
Thanks SteveI. Will do.

^^^ This. It wasn't the weight that was assymetric it was the beam width. Exactly like Kevo says, the frame width was different in specific parts of the frame, presumably to aid stability and increase stiffness in certain areas.

Never really got on with them myself.

Cheers

Ash
Thanks Ash. That means it was only asymmetric in shape, then, but not weight distribution?
 
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Kevo

Legend
Thanks Ash. That means it was only asymmetric in shape, then, but not weight distribution?
That would be my guess. I didn't notice anything different about the weight distribution. I never tried to determine if it was different either, but I would imagine that if one side of the head at the top was heavier than the other it would have been noticeable unless the variation was quite small. It'd be interesting to see if anyone had one of those old frames and try to determine the weight distribution.
 

cellofaan

Semi-Pro
I'll give this a shot tomorrow.
This could be interesting. The balance along the longitudinal axis shouldn't change as you add the same amount of lead on both sides. But the sweetspot would tend to become diagonal, so if you rotate the racquet 180 degrees, it could feel very different.
 
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