Table of Contents1. Introduction – Fan Zhendong series
2. Comparison by Performance Indices
……. 2-1. Elasticity Indices
……. 2-2. Vibration Indices
3. Summary

Update Notice (12th October 2023) : The data of ‘InnerForce Layer ALC’ has been changed from that of 2018 version to newer 2023 version. ‘InnerForce Layer ALC’s measured in 2023 are thicker, heavier and more elastic than those measured in 2018. TTGearLab will deal with those two versions as different blades.

Update Notice (18th July 2023) : The performance indeces of ‘Fan Zhendong ALC’ has been changed a bit by additional measurement.

1.  Introduction – Fan Zhendong series

Butterfly ‘Fan Zhendong’ series announced in September 2022 is Butterfly’s new top blade family named after new leader of Chinese Men’s National Team – Fan Zhendong. Like the previous ‘Zhang Jike’ series, ‘Fan Zhendong’ series is also based on the structure and shape of Viscaria, and consists of various 5+2 ply outer fiber models with changes in fiber. Five different fiber are applied to new ‘Fan Zhendong’ series – ALC, Super ALC, ZLC, Super ZLC and CNF. All five models share the head shape and handle shape. The size of head is 157mm x 150mm which is the regular head size of Butterfly blades. The length of handle is 100mm. The FL handle is the semi-wide handle which is based on the FL handle of recent Viscaria. The width is around 34mm at the end of handle, and around 27mm at the middle of handle. The same shape of FL handle is also applied to Zhang Jike series. It is a bit wider and flatter than ordinary FL handle that is applied to most of Butterfly blades such as Timo Boll series and InnerForce Layer series. The ST handle is rounded semi-wide handle (width = 28mm) which is currently the standard ST handle of Butterfly.

Article ‘Butterfly Fan Zhendong series – Photos‘ shows detailed picutes of three models – ‘Fan Zhendong ALC’, ‘Fan Zhendong Super ALC’ and ‘Fan Zhendong ZLC’.

Following is the basic information of the five models of Fan Zhendong series

Photo is from Butterfly home page (https://www.butterfly.co.jp)

‘Fan Zhendong ALC’ is the most important model in this family. It is the redesigned version of ‘Zhang Jike ALC’ and current ‘Viscaria’. Everything except for the graphic design is identical to that of ‘Viscaria’. Some players are saying that the FL handle of ‘Fan Zhendong ALC’ is a bit thicker than that of ‘Zhang Jike ALC’. But, still we don’t know whether there has been the modification of the thickness of handle or the difference is just due to the deviation by production lot.

Photo is from Butterfly home page (https://www.butterfly.co.jp)

Blade construction of ‘Fan Zhendong ALC’ is of course same as that of ‘Viscaria’ which was launched in late 1993. ALC(= Arylate Carbon) is placed directly under the top layer of 5-ply wood blade. Top layer is Koto. Middle layer is Ayous, and center layer is Kiri. That is the formula of 5+2 ply outer-fiber construction. Overall thickness is around 5.8mm. That is identical to the thickness of current version of ‘Viscaria’.

(Originally the thickness of ‘Viscaria’ had been 5.7mm until mid-term version with Ayous handle. But the thickness of current version of ‘Viscaia’ was increased to 5.8mm. The thickness had been already 5.8mm on the catalog, but actualy specification change was done much later. At the same time with current version of ‘Viscaria’, the specification of ‘Zhang Jike ALC’ was also changed. The thickness of ‘Zhang Jike ALC’ until ‘Q’ serial number is 5.7mm. However, the thickness of ‘Zhang Jike ALC’ from ‘R’ serial number is 5.8mm. And, ‘Fan Zhendong ALC’ follows the specification of ‘Zhang Jike ALC’ from ‘R’ serial number.)

Photo is from Butterfly home page (https://www.butterfly.co.jp)

‘Fan Zhendong Super ALC’ is based on ‘Viscaria Super ALC’. Everything except for the graphic design is identical to that of ‘Viscaria Super ALC’.

Photo is from Butterfly home page (https://www.butterfly.co.jp)

Blade construction of ‘Fan Zhendong Super ALC’ is same as that of ‘Viscaria Super ALC’. It is based on the construction of ‘Viscaria’. But, the thickness has been increased to 5.9mm from the 5.7mm of ‘Viscaria’, and new ‘Super ALC’ is inserted instead of ‘ALC’. ‘Super ALC’ is also a kind of Arylate Carbon. But, its woven structure is different from the ALC that is used for ‘Viscaria’. Because of different woven structure of fiber and increased thickness, ‘Fan Zhendong Super ALC’ gives different feeling and performance from ‘Fan Zhendong ALC’.

Photo is from Butterfly home page (https://www.butterfly.co.jp)

‘Fan Zhendong ZLC’ is the redesigned version of ‘Zhang Jike ZLC’. Everything except for graphic design is identical to that of ‘Zhang Jike ZLC’.

Photo is from Butterfly home page (https://www.butterfly.co.jp)

Blade construction of ‘Fan Zhendong ZLC’ is same as that of ‘Zhang Jike ZLC’. Thickness is around 5.5mm. ZLC (PBO Carbon) is placed directly under the Koto top layer. Middle layer is Ayous, and center layer is Kiri.

Photo is from Butterfly home page (https://www.butterfly.co.jp)

‘Fan Zhendong Super ZLC’ is the redesigned version of ‘Zhang Jike Super ZLC’. Everything except for graphic design is identical to that of ‘Zhang Jike ZLC’.

Photo is from Butterfly home page (https://www.butterfly.co.jp)

Blade construction of ‘Fan Zhendong Super ZLC’ is same as that of ‘Zhang Jike Super ZLC’. It is based on the construction of ‘Zhang Jike ZLC’ or ‘Timo Boll ZLC’. But, the thickness has been increased to 5.6~5.7mm from the 5.5mm of ‘Zhang Jike ZLC’, and new ‘Super ZLC’ is inserted instead of ‘ZLC’. ‘Super ZLC’ is also a kind of PBO Carbon. But, its woven structure is different from the ZLC that is used for ‘Zhang Jike ZLC’. Because of different woven structure of fiber and increased thickness, ‘Fan Zhendong Super ZLC’ gives different feeling and performance from ‘Fan Zhendong ZLC’.

Photo is from Butterfly home page (https://www.butterfly.co.jp)

‘Fan Zhendong CNF’ is based on ‘Revoldia CNF’. Everything except for the graphic design is identical to that of ‘Revoldia CNF’.

Photo is from Butterfly home page (https://www.butterfly.co.jp)

The construction is also based on that of ‘Viscaria’. Top layer is Koto, middle layer is Ayous and center layer is Kiri. But, the fiber that is directly placed under the top layer is replaced from ALC to new CNF – cellulose nano fiber. Overal thickness is around 5.7mm.

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2. Comparison by Performance Indices

‘Fan Zhendong’ series consists of five outer-fiber blades. So we can compare some famous outer-fiber blades from Butterfly and other brands. And, some inner-fiber blades can also be compared with ‘Fan Zhendong’ series. Regarding ‘Fan Zhendong’ series, TTGearLab couldn’t measure ‘Fan Zhendong CNF’ at this time, and hasn’t measured ‘Revoldia CNF’ yet. Therefore, the comparison doesn’t include the result of ‘Fan Zhendong CNF’. The result of ‘Fan Zhendong CNF’ will be added in the future if there is a chance of measuring it.

Folloing is the list of the outer-fiber blades to be compared with ‘Fan Zhendong’ series :

  • Butterfly ‘Mizutani Jun Super ZLC’ : Fiber is (Super) ZLC, and top layer is Limba
  • Butterfly ‘Mizutani Jun ZLC’ : Fiber is ZLC, and top layer is Limba
  • Stiga ‘Carbonado 290’ : Fiber is high-density TeXtreme, and top layer is Limba
  • Stiga ‘Carbonado 190’ : Fiber is mid-density TeXtreme, and top layer is Limba
  • Stiga ‘Dynasty Carbon’ : Fiber is TeXtreme, and top layer is Koto
  • Tibhar ‘Cedric Nuytinck’ : Fiber is ZLC, and top layer is Limba

Folloing is the list of the inner-fiber blades to be compared :

  • Butterfly ‘InnerForce Layer ZLC’ : inner ZLC
  • Butterfly ‘InnerForce Layer ALC’ : inner ALC – 2023 version which is thicker, heavier and faster than 2018 version
  • Stiga ‘Cybershape Carbon’ : inner Carbon Fiber, thick construction
  • DHS ‘Hurricane Long 5X’ : inner ALC, thick construction
  • DHS ‘Hurricane Long 5’ : inner ALC, standard thickness

Fig.01 Butterfly ‘Fan Zhendong’ series – ALC, Super ALC and ZLC

Comparison will be done by performance indices. Concerning the detail of four performance indices, please refer to following articles in ‘About TTGearLab’ section :

2-1. Elasticity Indices

Fig.02 Comparison by Elasticity Indices

Fig.02 shows the comparison graph of Elasticity Indices.

Ep (Primary Elasticity Index) is directly concerned with the rebound speed of blade. Ec (Central Elasticity Index) is concerned with additional ‘kick’ when player hits ball very hard.

The first group of the graph shows four blades of ‘Fan Zhendong’ series. ‘Fan Zhendong Super ZLC’ (Ep = 2.55, Ec = 2.15) is the most elastic model in the series. ‘Fan Zhendong ZLC’ (Ep = 2.03, Ec = 1.96)’ is less elastic than ‘Fan Zhendong Super ZLC’, but still it is a very fast blade. ‘Fan Zhendong Super ALC’ (Ep = 2.22, Ec = 2.15) is the second most elastic model. And, the Ep of ‘Fan Zhendong ALC’ ( = 2.02) is a bit lower than that of ‘Fan Zhendong ZLC’. And, the Ec of ‘Fan Zhendong ALC’ (= 1.92) is also a bit lower than that of ‘Fan Zhendong ZLC’. From the values, we can notice that the models with ‘Super’ fibers are faster than the models normal fibers. However, it isn’t only because of the higher elasticity of fibers but also because of the thicker constructions of ‘Super’ models.

Interestingly, if we lool at the relationship between Ep anc Ec, we can notice that ‘Fan Zhendong Super ALC’ looks like the faster version of ‘Fan Zhendong ZLC’, while ‘Fan Zhendong Super ZLC’ looks like the much faster version of ‘Fan Zhendong ALC’. It is expected that ‘Fan Zhendong Super ALC’ can’t be the speed upgrade from ‘Fan Zhendong ALC’ because those two blades show different relationships between Ep and Ec.

The second group shows the data of outer-fiber blades. We can find the blade that is comparable with each blade of ‘Fan Zhendong’ series. First, Stiga ‘Carbonado 290’ is comparable with ‘Fan Zhendong Super ZLC’. Both of its Ep and Ec (= 2.71 and 2.18 respectively) are a bit higher than those of ‘Fan Zhendong Super ZLC’, and the relationship between Ep and Ec is similar to that of ‘Fan Zhendong Super ZLC’. And, Mizutani Jun Super ZLC is comparable with ‘Fan Zhendong Super ALC’ although its top layer and fiber are different from those of ‘Fan Zhendong Super ALC’. So, we can think that ‘Mizutani Jun Super ZLC’, ‘Fan Zhendong Super ALC’ and ‘Fan Zhendong ZLC’ are the blades with similar characteristics and a bit different speed. On the contrary, with the Ep comparable with that of ‘Fan Zhendong Super ALC’ and the Ec comparable with that of ‘Fan Zhendong ZLC’, ‘Mizutani Jun ZLC’ shows unique characteristic that can’t match any model of ‘Fan Zhendong’ series. And, ‘Cedric Nuytinck’ shows simialr characteristics as ‘Fan Zhendong ALC’ and ‘Fan Zhendong ZLC’. ‘Dynasty Carbon’ is the slowest outer-fiber blade in this comparison, and its characteristic is unique. Its Ec is noticeable lower than that of any other outer-fiber blade in this comparison.

The third group shows inner-fiber blades. The average elasticity of this group is definitely lower than that of second (= outer-fiber) group. The fastest one in this group is Stiga ‘Cybershape Carbon’ whose Ep is 2.14 and Ec is 1.86. It is even more elastic than ‘Fan Zhendong ALC’. That is because of its thick construction and highly elastic woven carbon fiber. All the other blades in this group is less elastic than all models of ‘Fan Zhendong’ series.

Examining Ec/Ep is an easier way to understand the characteristics of blade concerned with elasticity. Fig.03 shows the relationship between Ec/Ep and Ep.

Fig.02 Ec/Ep vs. Ep

Ec/Ep expresses the ‘tendency’ of the elasticity of blade. By examining Ec/Ep and Ep at the same time, we can easily understand the behavior of blades.

On the graph, all blades except for reference blade are in ‘Hold’ range (Ec/Ep < 1.0). And, among ‘Fan Zhendong’ series,

Among ‘Fan Zhendong’ series, ony one model – ‘Fan Zhendong Super ZLC’ is placed in ‘Deep Hold’ rage (Ec/Ep < 0.9). It means that ‘Fan Zhendong Super ZLC’ holds ball very deep when player hit the ball very strongly. That makes continuous topspin at close-to-table area very easy and stable. The blade close to ‘Fan Zhendong Super ZLC’ is Stiga ‘Carbonado 290’. Although those two are a bit different from each other, two blades can be categorized into one group – Very fast & deep hold.

Other three models of  ‘Fan Zhendong’ series – ‘Fan Zhendong ALC’,  ‘Fan Zhendong ZLC’ and ‘Fan Zhendong Super ALC’ – are placed close to the  ‘Linear’ line (Ec/Ep = 1.0). Although those two are in ‘Mild Hold’ range (0.9 < Ec/Ep < 1.0), we can think that the elasticity characteristics of those two blades are almost  linear. That kind of blades are suitable for all-round play because the player control most of techniques very precisely. And, we can consider ‘Fan Zhendong Super ALC’ as the faster replacement of ‘Fan Zhendong ZLC’ if we don’t think about the difference of feeling. (If the player doesn’t like the ‘metalic’ feeling of ‘Fan Zhendong ZLC’, ‘Fan Zhendong Super ALC’ can be the proper solution because it doesn’t give that uncomfortable feeling.) Also, ‘Mizutani Jun Super ZLC’ can enter the same category as those two blades, and can be considered as the fastest one in this category.

If the player who has used ‘InnerForce Layer ALC’ and is finding the faster replacement in the ‘Fan Zhendong’ series, the solution can be ‘Fan Zhendong ALC’. And, if curent blade of the player is ‘Hurricane Long 5’ or ‘Hurricane Long 5X’, ‘Fan Zhendong Super ZLC’ will be the optimum solution as the faster replacement. And, if the player frequently use smash and block, ‘Fan Zhendong ZLC’ and ‘Fan Zhendong Super ALC’ are expected to be the proper choice.

Then next, let’s compare Vibration Indices. Fig. 04 shows the comparison graph of Vibration Indices.

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2-2. Vibration Indices

Fig.04 Comparison by Vibration Indices

Vibration Indices are concerned with feeling. Vp indicates primary feeling which is transferred to player’s palm. And, Vl is the feeling at the wing of a blade. It is felt by player’s index finger or middle finger.

The first group of the graph shows four blades of ‘Fan Zhendong’ series. We can notice that the Vp’s of ‘Fan Zhendong Super ZLC’, ‘Fan Zhendong ZLC’ and ‘Fan Zhendong Super ALC’ are almost similar. (And, the Vp of ‘Fan Zhendong ZLC’ and ‘Fan Zhendong Super ALC’ are identical to each other.) But, the difference is in Vl. The Vl of ‘Fan Zhendong Super ZLC’ is much higher than the Vp. The Vl of ‘Fan Zhendong ZLC’ is close to the Vp. And, the Ec of ‘Fan Zhendong Super ALC’ is much lower than the Vp. Therefore the player will feel those three blades quite different. And, the Vp of ‘Fan Zhendong ALC’ is smaller than that of the other three blades.

The second group shows the values of comparable outer-fiber blades. ‘Carbonado 290’ which is comparable with ‘Fan Zhendong Super ZLC’ in elasticity also shows the vibration indices those can be comparable with those of ‘Fan Zhendong Super ZLC’. But, the Vl is noticeably higher than that of ‘Fan Zhendong Super ZLC’. So the players will feel that ‘Carbonado 290’ is sharper than ‘Fan Zhendong Super ZLC’ at the area of index finger. We can see the similar result from the comparison between ‘Fan Zhendong ALC’ and ‘Carbonado 190’. And, it is interesting that ‘Mizutani Jun ZLC’ shows similar values as ‘Fan Zhendong ZLC’ although there are differences in the top layer. The players will feel that ‘Mizutani Jun ZLC’ is definitely different from ‘Fan Zhendong ZLC’. However, that isn’t because of vibration factors but probably because of the elasticity factors. Finally, we can notice that Stiga ‘Dynasty Carbon’ is noticeably softer than all the other outer-fiber blades in this comparison. ‘Dynasty Carbon’ can be compared with inner-fiber baldes although it is an outer-fiber blade.

The third group shows the values of inner-fiber blades. Again, Stiga ‘Cybershape Carbon’ shows the values comparable with ‘Fan Zhendong’ sereis. Its Vp is a bit lower than the Vp of ‘Fan Zhendong ZLC / Super ALC’, and its Ec is identical to that of ‘Fan Zhendong Super ZLC’. The Vp’s of all the other inner-fiber blades are noticeably lower than those of ‘Fan Zhendong’ series. But, the Vl of ‘Hurricane Long 5X’ can be compared with the Vl’s of ‘Fan Zhendong ZLC’ and ‘Fan Zhendong ALC’. The players who are sensitive to the feeling at the index finger will feel the similarity among those three blades.

Examining Vl/Vp is an easier way for the comparison of the tendency of feeling. Fig.05 shows the relationship between Vl/Vp and Vp for easier comparison.

Fig.05 Vl/Vp vs. Vp

On the graph, most of the blades in this comparison are placed in ‘relatively sharper at finger’ range (Vl/Vp > 1.0). Among the four blades of ‘Fan Zhendong’ series, three models are in that range. And, one model – ‘Fan Zhendong Super ALC’ – is placed in ‘relatively more comfortable at finger’ range (Vl/Vp < 1.0). But, none of four model is placed outside the ‘Near Uniform’ range (0.9 < Vl/Vp < 1.1). Especially ‘Fan Zhendong ZLC’ is very close to ‘Uniform’ line (Vl/Vp = 1.0). ‘Fan Zhendong ALC’ is also close to that line. No model shows extreme value of Vl/Vp. And, in fact, all Butterfly blades in this comparison are in ‘Near Uniform’ range, while all Stiga blades except for the reference blade are in somewhat extreme range that Vl/Vp’s are higher than 1.1. Here we can see the difference of the concept between Butterfly and Stiga. (DHS blades are also in the same range as Stiga blades.) Among four models of ‘Fan Zhendong’ series, what is comparable with Stiga blades is ‘Fan Zhendong Super ZLC’.

If we just see Vp, four models of ‘Fan Zhendong’ series are placed at the right side of the graph. It means that the feeling of ‘Fan Zhendong’ series is hard. It is a matter of course because all blades of ‘Fan Zhendong’ series are outer-fiber blades equipped with relatively hard top layer and highly elastic fibers.

From the graph, we can again notice that ‘Fan Zhendong ALC’ (and ‘Viscaria’) can be the faster and harder replacement from ‘InnerForce Layer ALC’, because the Vl/Vp’s of those two are close to each other.

It is interesting that ‘Mizutani Jun ZLC’ and Tibhar ‘Cedric Nuytinck’ are very close to ‘Fan Zhendong ZLC’. Actually there are difference in feeling because of the difference of top layer and middle layer. But, we can notice that the difference isn’t because of vibration but because of elasticity.

‘Fan Zhendong Super ALC’ looks quite unique on the graph. If the player doesn’t like sharp feeling at index finger, ‘Fan Zhendong Super ALC’ may be the best choice. And, there isn’t any blade in this comparison whose feeling is comparable with that of ‘Fan Zhendong Super ALC’. But, we remember the blade which is placed near the position of ‘Fan Zhendong Super ALC’. That is old Stiga ‘Clipper CR’ which is thicker and heavier than current version of ‘Clipper CR’. The characteristics of ‘Fan Zhendong Super ALC’ is very close to those of old ‘Clipper CR’ in both of elasticity and vibration. Therefore, ‘Fan Zhendong Super ALC’ will be very good replacement of old thick & heavy ‘Clipper CR’ or ‘Clipper Wood’.

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3. Summary

Butterfly ‘Fan Zhendong’ series are new outer-fiber blade family suggested by Butterfly, and is replacing ‘Zhang Jike’ series. Four models among the five models of ‘Fan Zhendong’ series are measured. The result can be summarized as follows:

  • ‘Fan Zhendong Super ZLC’ is fastest in the series. And, it holds the ball very deep when players hit the ball very hard. Also, among four models it provides the sharpest feeling at index finger. The characteristics of ‘Fan Zhendong Super ZLC’ can be compared with fiber blades from Stiga and DHS.
  • ‘Fan Zhendong ZLC’ is a blade whose elasticity characteristics is almost linear and vibration characteristic is almost uniform. Therefore it is suitable for all-round play that lay emphasis on the precision of ball control, although it is a fast & hard blade.
  • ‘Fan Zhendong Super ALC’ can be considered as the faster variation of ‘Fan Zhendong ZLC’. But, it provides much milder feeling than ‘Fan Zhendong ZLC’ at index finger. The characteristics of ‘Fan Zhendong Super ALC’ is very similar to those of traditional thick & heavy 7-ply wood blade. Therefore, it can be direct replacement of thick 7-ply wood blade of ‘Clipper’ type.
  • ‘Fan Zhendong ALC’ which is identical to ‘Viscaria’ except for the graphic design and is considered as the ‘standard’ fiber blade is placed near ‘Fan Zhendong ZLC’. Although the actual feeling of ‘Fan Zhendong ALC’ is quite different from that of ‘Fan Zhendong ZLC’, we can notice that there isn’t significant difference in fundamental characteristics. Anyway, because of its position on the graph, it can be the first consideration when the player is finding the faster replacement of inner-ALC or 5-ply wood blade.

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