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Ross Leidy "Sotto Voce"
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Ross Leidy View Drop Down
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Points: 402 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ross Leidy Quote  Post ReplyReply Direct Link To This Post Posted: 11/03/2011 at 4:01pm
Originally posted by JimT JimT wrote:

Originally posted by Ross Leidy Ross Leidy wrote:

It is pretty light - maybe not as light as unfigured redwood, but I didn't need to hollow this handle to keep the blade weight to round 88g.  It's a very smooth feeling wood.  I've not used burl cork, but I'd imagine it's much more textured.


Ross, could you disclose the construction - layer thickness numbers together with wood types, and then the overall  thickness? I am still thinking about how my future RL Ultima Steel or Red Hammer might look like... and the main concern of course is the proper weight/balance. So I would love to compare what I have in my head with your real-life example of a blade.

So if you could post something like this (for your latest blade):

Obeche 0.7 mm - ipe 0.5 mm - Balsa 4 mm - ipe 0.5 mm - Obeche 0.7 mm
weight: 88 g
total thickness: 6.5 mm

that would help me (and hopefully others) a lot.

Thanks much! Great blades! I loved the Part Deco handle. Is Amboina burl heavy? it's not present in your SG table.

Sure, no problem.  The composition is:
obeche 0.9mm - ipe 0.6mm - balsa 4mm - ipe 0.6mm - obeche 0.9mm
weight: 88g
head size: 149W x 155L
handle size: 103L x 23 thick
final thickness: 7.1mm  

I could have hollowed the handle pieces (they accounted for about 24g of the total weight), but leaving them solid kept the blade balanced at around the 50% mark of the overall length. 

The amboyna burl on Part Deco is not that heavy - I think the SG is around .7 or so.
Ross
http://rossleidy.com - Handcrafted Table Tennis Blades
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JimT View Drop Down
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Points: 14602 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JimT Quote  Post ReplyReply Direct Link To This Post Posted: 11/03/2011 at 4:15pm
Originally posted by Ross Leidy Ross Leidy wrote:


Sure, no problem.  The composition is:
obeche 0.9mm - ipe 0.6mm - balsa 4mm - ipe 0.6mm - obeche 0.9mm
weight: 88g
head size: 149W x 155L
handle size: 103L x 23 thick
final thickness: 7.1mm  

I could have hollowed the handle pieces (they accounted for about 24g of the total weight), but leaving them solid kept the blade balanced at around the 50% mark of the overall length. 

The amboyna burl on Part Deco is not that heavy - I think the SG is around .7 or so.


First of all, thank you for such a quick reply!

Now, let's see

1) obeche 1.8 x 0.36 = 0.65, ipe 1.2 x 0.91 =  1.1, balsa 4 x 0.17 = 0.68
2) add up and multiply by 19 (*) (since face is a bit smaller) = 2.43 x 19 = 46 g
   plus 8 g of glue = 54
3) handle pieces 24 g we get 78 g, hmm... 10 g less than real weight, which constitutes
   about 16% of the blade blank weight (no handle).

That's a pretty big deviation. Is it because the density of the particular pieces of wood was that much higher than standard, or did I miss something in my calculations?

(*) For those of you who don't know WTH I am talking about, see the "magic formula" at OOAK:

http://ooakforum.com/viewtopic.php?f=43&t=11969&p=192541#p192541
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Ross Leidy View Drop Down
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Points: 402 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ross Leidy Quote  Post ReplyReply Direct Link To This Post Posted: 11/03/2011 at 7:23pm
I suspect the discrepancy is due in part to the difference between published average SGs and actual SGs.  IIRC, when I calculated an actual SG of a recent balsa sample, I got 0.19.  The other big ticket item is the ipe, and I haven't got an SG on an actual sample for that.  And, perhaps I underestimated the area for the blade on the ooak post.  When I was thinking about simplifying the area estimate by using the area of a circle, I didn't take into account that the head length is taken from the top of the handle to the top of the blade.  That leaves out the shoulders of the blade.  So, perhaps your magic multiplier is just too low.
Ross
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JimT View Drop Down
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Points: 14602 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JimT Quote  Post ReplyReply Direct Link To This Post Posted: 11/03/2011 at 8:49pm
Originally posted by Ross Leidy Ross Leidy wrote:

And, perhaps I underestimated the area for the blade on the ooak post.  When I was thinking about simplifying the area estimate by using the area of a circle, I didn't take into account that the head length is taken from the top of the handle to the top of the blade.  That leaves out the shoulders of the blade.  So, perhaps your magic multiplier is just too low.


I think you are right - I will recalculate it and post the updated magic formula soon
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JimT View Drop Down
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Points: 14602 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JimT Quote  Post ReplyReply Direct Link To This Post Posted: 11/04/2011 at 10:11am
Careful recalculation (which had nothing to do with this particular example) gave me proper magic number. it's 23. So we get

1) obeche 1.8 x 0.36 = 0.65, ipe 1.2 x 0.91 =  1.1, balsa 4 x 0.17 = 0.68
2) add up and multiply by 23 = 2.43 x 23 = 56 g
   plus 8 g of glue = 64
3) handle pieces 24 g we get 88 g

which is the actual weight!!!!
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JimT View Drop Down
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Redoing calculation for the Red Hammer

SG values: WRC = 0.32, ipe = 0.91, BE = 0.66, MA = 0.40

1a) 0.32 * 6.5 (that's entire WRC thickness) = 2.08
1b) 0.91 * 1 (entire ipe thickness) = 0.91

2) adding we get 2.99, round to 3, multiplying by 23 we get 69 g, and add 4 x 2 = 8 g for the glue, result is 77 g

3) handle: 40 * 0.65 * 80% + 40 * 0.4 * 20% = 24 g

Result: 101 g - that is way too much... however 8 mm of WRC give me 8 * 0.32 * 23 = 59 g (instead of 69 g) which explains why BBC Ultima weighs 89 g (also Charlie's blank of WRC must have been a bit lighter than average, since he specifically looked for such).

It seems that I have to abandon my idea about using a thin layer of ipe as a replacement for carbon. Unless Ross will be able to whittle ipe layer down to 0.3 mm, and we will change the overall thickness of WRC to 6.3 (so that the overall thickness of the blade is 7.0) we will get

0.32 * 6.3 + 0.91 * 0.6 = 2.56, and multiplying by 23 we get 58 g then adding 32 g we come to 90 g.

That is very good - but I should wait for the opinion from Ross - whether it is possible and if it even makes any sense to use a 0.3 mm layer of ipe as a replacement for thin carbon layer.
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JimT View Drop Down
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Points: 14602 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JimT Quote  Post ReplyReply Direct Link To This Post Posted: 11/04/2011 at 1:01pm
Ross replied at OOAK that 0.3 mm of ipe is too thin for his sander and also very risky, wood becomes fragile.

Well, if ipe layer is rigid enough (and I suspect that it gives much more rigidity and hardness to the blade than a 0.1 mm carbon layer) then my next design is this

blade: 1.75 mm WRC + 0.5 mm ipe + 3 mm Balsa + 0.5 mm ipe + 1.75 mm WRC
handle: 50 % Amboyna burl (middle) + 50 % burl cork (sides of the handle halves to provide texture for traction so that I do not need to use grip tape), unless it looks too ugly...

Calculations show 88 g but it can always be a few grams off... I wonder what SG is for burl cork?
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Points: 723 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Carryboy Quote  Post ReplyReply Direct Link To This Post Posted: 11/10/2011 at 3:24pm
I got this sotto Voce a few weeks ago from Ross. This is the standard 6.5mm with outer plies of Limba.
A short review and comparison between my first to follow next week.Thumbs Up





Edited by Carryboy - 11/10/2011 at 3:30pm
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frogger View Drop Down
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Gawd that thing is so beautiful it makes my eyes water!Cry
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Yakult View Drop Down
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Edited by Yakult - 01/03/2013 at 9:03pm
defense alpha

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Points: 3393 		Post Options Post Options   Thanks (0) Thanks(0)   Quote peter79 Quote  Post ReplyReply Direct Link To This Post Posted: 11/10/2011 at 11:31pm
From the looks I would say it's the best custom made blade ever, not sure it plays a good as it looks.
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Points: 457 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Antmay Quote  Post ReplyReply Direct Link To This Post Posted: 11/11/2011 at 9:26am
peter79,
Custom blade is very personal and it can be a hit or a miss. Working with Ross is a nice experience as he will work with you very closely on your blade ( wood selection, thickness, style of play...). His custom blades are used all over the world and so far it has nothing but good reviews and praises.
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peter79 View Drop Down
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Points: 3393 		Post Options Post Options   Thanks (0) Thanks(0)   Quote peter79 Quote  Post ReplyReply Direct Link To This Post Posted: 11/11/2011 at 9:46am
Antmay, you're right, I might experience to try it myself :)
I wish I would like to make hurricane King like composition.
Koto-spruce-Ayous-spruce-Koto in 5.7 Thickness
With wide selection of exotic handle as seen on the handle gallery.
Is it possible?


Edited by peter79 - 11/11/2011 at 9:47am
Andro Wanokiwami AO Offensive 83 gr
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zheyi View Drop Down
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Originally posted by Yakult Yakult wrote:

this thread makes me want to sell all my blades and order a Rose Leidy custom blade!!
Why sell? Is it that expensive? I like the HK/HH composition too! Is that possible? to my thickness and weight? Embarrassed
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Ross Leidy View Drop Down
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Points: 402 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ross Leidy Quote  Post ReplyReply Direct Link To This Post Posted: 11/11/2011 at 11:17am

I've looked for sources for spruce in the past and didn't have much luck.  I'll have to renew my search and see what I can turn up.
Ross
http://rossleidy.com - Handcrafted Table Tennis Blades
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Yakult View Drop Down
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Edited by Yakult - 01/03/2013 at 9:02pm
defense alpha

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I would like to say playing with my new Ross Leidy Ultimate P is like comparing a rusty Chevy to a brand new Mazzeratti. With Ross you get what you pay for pure and simple. I have owned over 100 blades over the years and now regular production blades just don't do it for me anymore. Call me arrogant, or whatever the fact remains that he builds in my opinion the finest blades in the world. I'm already thinking about ordering more. Yes it's only a tool but man what a tool! Sotto Voce is superb, but feel it may be a bit to fast for my style so hence the Ultimate P for me. Thumbs Up
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