Post by Richie3Jack on Aug 17, 2012 8:08:24 GMT -5
I have shown this video before on my blog, but here it is again, with Tom Wishon explaining the 919THI driver.
The 919THI is Wishon’s flagship driver model. Wishon claims that it is because it is the driver that they tested that came out with the best results, particularly in smash factor and ball speeds on off-center hits.
The main idea is that the head has the highest MOI on the market, between 5,000 – 5,025 kg/cm^2 , depending on what model head you get. However, if has a classic pear shaped head. So it’s much along the lines of a Nike Sasquatch high MOI driver, but without a square head. That is why it’s able to produce higher ball speeds on off center hits, the MOI of the head is greater.
From a looks perspective, it does have a classic pear shaped design, but I generally find it a little ‘wider’ from the face to the back end of the clubhead than most drivers on the market. It also has the Graduated Roll Technology, which means that from the sweetspot down, the loft is the same on the face. From above the sweetspot, the loft increases by about 1.5°. This is unlike the OEM drivers without GRT as the loft gets lower on the bottom of the face and higher on the top of the face.
While the head is not as customizable as the 739 CCG model, one can find a lot of different options with the specs. The lofts are stamped at 9°, 11°, 13° and 15.5°, all with the hand pick tolerance of 1°. The face angles are general at 0.5° hooked. There is a ‘draw bias’ model that is stamped at 10.5° loft with a 3° hooked clubface.
Here are the entire specs.
The head weight specs are set to 202 grams. The handpick option allows you to possibly get a head +/- 2 grams tolerance.
In terms of MOI matching, one will have to use a hosel weight and/or some lead tape on the hosel to get the MOI to match. The good thing is I generally find with drivers any weight added will affect the total club MOI more than with the irons. Meaning, in general if I add 1-gram of weight with the irons, it will affect the MOI by about 8 points. With the driver, it will tend to affect the MOI by about 12 points. Thus, if you have a fear of adding lead tape to the head and you need to add 100 points of MOI, you can do it with about 6 grams of lead tape instead of 10 grams of lead tape.
I have yet to hit the 739 CCG model, but I think it’s a bit advantageous for slower swing speed players. Particularly those who have fairly consistent swings because they can probably play with a stiffer shaft, but need the head to stay light. If they were to use the 919THI model, they may run into a situation where they have to get a lighter shaft that may be too soft of a tip for their liking.
I do find that the 919THI launches a little lower than most drivers which makes me think that the CoG is a little higher up. Generally, I have received great reviews about the head, the question becomes finding the right shaft that fits the golfer’s swing.
3JACK
The 919THI is Wishon’s flagship driver model. Wishon claims that it is because it is the driver that they tested that came out with the best results, particularly in smash factor and ball speeds on off-center hits.
The main idea is that the head has the highest MOI on the market, between 5,000 – 5,025 kg/cm^2 , depending on what model head you get. However, if has a classic pear shaped head. So it’s much along the lines of a Nike Sasquatch high MOI driver, but without a square head. That is why it’s able to produce higher ball speeds on off center hits, the MOI of the head is greater.
From a looks perspective, it does have a classic pear shaped design, but I generally find it a little ‘wider’ from the face to the back end of the clubhead than most drivers on the market. It also has the Graduated Roll Technology, which means that from the sweetspot down, the loft is the same on the face. From above the sweetspot, the loft increases by about 1.5°. This is unlike the OEM drivers without GRT as the loft gets lower on the bottom of the face and higher on the top of the face.
While the head is not as customizable as the 739 CCG model, one can find a lot of different options with the specs. The lofts are stamped at 9°, 11°, 13° and 15.5°, all with the hand pick tolerance of 1°. The face angles are general at 0.5° hooked. There is a ‘draw bias’ model that is stamped at 10.5° loft with a 3° hooked clubface.
Here are the entire specs.
The head weight specs are set to 202 grams. The handpick option allows you to possibly get a head +/- 2 grams tolerance.
In terms of MOI matching, one will have to use a hosel weight and/or some lead tape on the hosel to get the MOI to match. The good thing is I generally find with drivers any weight added will affect the total club MOI more than with the irons. Meaning, in general if I add 1-gram of weight with the irons, it will affect the MOI by about 8 points. With the driver, it will tend to affect the MOI by about 12 points. Thus, if you have a fear of adding lead tape to the head and you need to add 100 points of MOI, you can do it with about 6 grams of lead tape instead of 10 grams of lead tape.
I have yet to hit the 739 CCG model, but I think it’s a bit advantageous for slower swing speed players. Particularly those who have fairly consistent swings because they can probably play with a stiffer shaft, but need the head to stay light. If they were to use the 919THI model, they may run into a situation where they have to get a lighter shaft that may be too soft of a tip for their liking.
I do find that the 919THI launches a little lower than most drivers which makes me think that the CoG is a little higher up. Generally, I have received great reviews about the head, the question becomes finding the right shaft that fits the golfer’s swing.
3JACK