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alfie

Post subject:

Posted: 20 Nov 2007, 08:23

EJ in recovery

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haggisv wrote:

Cheers Martin!

How do you know the topsheet is hardness 42deg?

this guy is really into TT bigtime,I see him on the German forum.
Ask him about CTE you will get flooded with info upto your eyeballs :lol:

he is really great.
Welcome Martin good to see you here

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Shoebox9

Post subject:

Posted: 20 Nov 2007, 09:07

Rotatus Maximus

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andrefox wrote:

I reckon if we go on about it, one of 3 things will happen:
1. Silver will think - 'a hah, those blokes are right, I better turn the significant digits dial down to 2';
2. Silver will think - 'shoot, I like lots of numbers, I'm going to leave it just as it is'

3. Silver gets a dose of 'I'm sick of people saying rude things about my numbers, I'm going to take them away never to be seen again'. :cry:

I was primarily suggesting one more input field & a related equation (ie known calibrated source y/n? If yes, x2 entry before averaging).

The other suggestion was showing the cut weight the numbers equal for several example blades. Once the equations were setup, this would be no extra on-going work.

I'd love to see Silver's excellent work turn into a widely referenced wiki, linked to by TT forums everywhere. This is extremely useful information.

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martinspin

Post subject:

Posted: 20 Nov 2007, 17:00

Super User

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Hey Alex

haggisv wrote:

Cheers Martin!

How do you know the topsheet is hardness 42deg?

I thought that this question will following. In the past I tried this with a "Durometer". Now I use my fingertip to feel the hardness. I know that this is not very scinetific but it's enough to compare the hardness between the spong and the topsheet.

On the tt-news forum I put a list with backside (#15) and pips-out (#32) rubbers where I compared the hardness between the spong and the topsheet. I used + for rubbers with softer spongs then the topsheet and - for softer topsheets then the spong. 0 is about the same hardness.

My theory is that +-rubbers (e.g. BTY) with a low throw angle apply to harder woods and - rubbers with a high throw angle (e.g. many chinese rubbers) apply to softer woods. Tuning is for me a possiblility to make a balance between the wood and the spong.

Greets, Martin

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DMS Spinfire OX | STIGA Hornet | YASAKA Cobalt OX

Last edited by martinspin on 21 Nov 2007, 17:03, edited 1 time in total.

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martinspin

Post subject:

Posted: 21 Nov 2007, 08:18

Super User

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Hi friends

Brand: Friendship
Model: Super 729 FX (Soft)
Type: In
Colour: Black
Spong thickness: 1.0 mm
Spong hardness: 35°
Topsheet thickness: 1.6 mm
Topsheet hardness: 38°
Uncut Mass: 16.3 cm x 16.3 cm
Uncut weight: 44 g
g/cm2: 0.165
Throw angle (flat to bold): 2 (5)

Perhaps some of you can verify the properties of the topsheet.

Topsheet hardness bigger then 5° as the spong hardness would produce a very low throw angle 1 (5).
Topsheet hardness bigger then 1° as the spong hardness would produce a low throw angle 2 (5).
Topsheet hardnessl till +1°/-1° then the spong hardness will produce a medium throw angle 3 (5).
Spong hardness bigger then 1° as the topsheet hardness would produce a high throw angle 4 (5).
Spong hardness bigger then 5° as the topsheet hardnes would produce a very high throw angle 5 (5).

Thanks, Martin

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DMS Spinfire OX | STIGA Hornet | YASAKA Cobalt OX

Last edited by martinspin on 22 Nov 2007, 23:33, edited 3 times in total.

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martinspin

Post subject: Palio Hadou

Posted: 21 Nov 2007, 08:43

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Hey friends

Brand: PALIO
Model: Hadou
Colour: Red
Spong thickness: 1.8 mm
Spong hardness: 38°
Topsheet thickness: 1.6 mm
Topsheet hardness: 43°
Uncut Mass: 16.5 cm x 16.5 cm
Uncut weight: 58 g
g/cm2: 0.213
Throw angle (low to high): 2 (5)

Greets, Martin

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DMS Spinfire OX | STIGA Hornet | YASAKA Cobalt OX

Last edited by martinspin on 21 Nov 2007, 17:00, edited 1 time in total.

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haggisv

Post subject:

Posted: 21 Nov 2007, 08:55

Dark Knight

Joined: 13 Dec 2006, 12:34
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Blade: Trinity Carbon
FH: Victas VS > 401
BH: Dr N Troublemaker OX

martinspin wrote:

Hi friends

Brand: Friendship
Model: Super Soft 729 FX
Colour: Black
Spong thickness: 1.0 mm
Spong hardness: 35°
Topsheet thickness: 1.6 mm
Topsheet hardness: 38°
Uncut Mass: 16.3 cm x 16.3 cm
Uncut weight: 44 g
g/cm2: 0.165
Curve (flat to bold): 2 (5)

Perhaps some of you can verify the properties of the topsheet.

Topsheet hardness bigger then 5° as the spong hardness would produce a very flat curve 1 (5).
Topsheet hardness bigger then 1° as the spong hardness would produce a flat curve 2 (5).
Topsheet hardnessl till +1°/-1° then the spong hardness has a neutral curve 3 (5).
Spong hardness bigger then 1° as the topsheet hardness would produce a bold curve 4 (5).
Spong hardness bigger then 5° as the topsheet hardnes would produce a very bold curve 5 (5).

Thanks, Martin

By 'curve' you're referring to the path of the ball when you loop, right?

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martinspin

Post subject:

Posted: 21 Nov 2007, 09:43

Super User

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Hi Alex

haggisv wrote:

By 'curve' you're referring to the path of the ball when you loop, right?

It's not only when looping. It's also when defending with backspin or hitting a ball. I mean the angle when the ball leaves the racket. What are the correct words for this circumstance?

Martin

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haggisv

Post subject:

Posted: 21 Nov 2007, 09:56

Dark Knight

There is much confusion about what the correct terms are... I see the following terms as meaningful for looping type strokes:

1. Throw angle - the angle the ball comes off your bat for a loop
2. Arc - the path the ball takes after it leaves your racket... obviously a combination of speed and spin...

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fosssil

Post subject:

Posted: 21 Nov 2007, 09:56

A Beautiful Brain

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Martinspin, I'm pretty sure the words are high throw, medium throw or low throw...Im sure someone knows if this is wrong,

Ah, I see Alex has posted while I was two finger typing my post..lol

fosss

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martinspin

Post subject: FRIENDSHIP 729 Focus I

Posted: 22 Nov 2007, 23:28

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Supplier: FRIENDSHIP
Brand: 729 Focus (I)
Type: In
Colour: Black
Spong thickness: 1.5 mm
Spong hardness: 35°
Topsheet thickness: 1.6 mm
Topsheet hardness: 38°
Uncut Mass: 16.3 cm x 16.3 cm
Uncut weight: 48 g
g/cm2: 0.180
Throw angle (low to high): 2 (5)

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DMS Spinfire OX | STIGA Hornet | YASAKA Cobalt OX

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martinspin

Post subject: MILKY WAY Neptune

Posted: 22 Nov 2007, 23:52

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Supplier: MILKY WAY (YINHE)
Brand: Neptune
Type: Long
Colour: Black
Spong thickness: OX
Spong hardness: -
Topsheet thickness: 2.0 mm
Topsheet hardness: 38°
Uncut Mass: 17.4 cm x 17.4 cm
Uncut weight: 24 g
g/cm2: 0.079
Throw angle (low to high): 2 (5)

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DMS Spinfire OX | STIGA Hornet | YASAKA Cobalt OX

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Silver

Post subject:

Posted: 23 Nov 2007, 00:05

I am Legend

Joined: 13 Dec 2006, 18:21
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Updated.
(This is a marker so I know where I have inputted up to)

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martinspin

Post subject:

Posted: 23 Nov 2007, 01:31

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Hey Silver

Silver wrote:

Updated.
(This is a marker so I know where I have inputted up to)

I'm missing Yinhe MW 9000 and FS 729 Focus I that I've posted here at the Rubber Mass Database.

Thanks
Martin

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Silver

Post subject:

Posted: 23 Nov 2007, 06:54

I am Legend

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The Focus I was in there.
Just put the 9000 in. I'd prefer it if you gave a mass in grams instead of the grams.cm^-2.

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martinspin

Post subject:

Posted: 23 Nov 2007, 16:02

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Hey Silver

Sorry, I forgot it for the 9000. The weight of the uncut rubber is 76 grams.

Martin

Silver wrote:

The Focus I was in there.
Just put the 9000 in. I'd prefer it if you gave a mass in grams instead of the grams.cm^-2.

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DMS Spinfire OX | STIGA Hornet | YASAKA Cobalt OX

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