Yes. I'll tell you about that holy **** moment. There's times where im literally hitting the ball like a pro, people a block away could hear the pop.
It's when you can get the Safin boom! sound regularly that I expect my payment to come through the mail. Just make the $9.99 to
www.heavyballs.com.
For me, I found that the heaviness of the ball comes the racket head trailing the laid-back wrist trailing the shoulder approaching the POC. Is this the "slingshot" FH you're referring to? I thought this was the "pull" FH?
Yeah, that's the basic mechanics of a "pull" stroke, and it produces the textbook WW FH.
A key mechanical element in this FH is that during the transition from the backswing to forward swing, the forearm passively supinates (i.e. wrist lays back) due to the torque of the racquet stretching the wrist flexors. This triggers a ballistic/explosive effect with the forearm rotation.
The more the wrist is allowed to lay back during the transition, the more and accelerated the wiping action you'll get. You have 3 basic takeback styles, all related to the forearm rotation during racquet drop.
1) The basic style (similar to Agassi) is to not let the forearm rotate at all during the racquet drop, and to do a normal scooping swing. Often the wrist is mildly laid back through the takeback, and the racquet frame is relatively on edge. This produces less and slower wiping movement, though it's still pretty big.
2) A "sidearm/throwing" style (Safin and majority of players) is to allow the forearm to supinate during the racquet drop, and to do a normal scooping swing during the transition. One visualization for this technique is to "pat the dog", where usually the palm arrive about parallel with the ground before you initiate the forward swing. (Then the scooping motion aids in opening up the racquet face while the wrist lays back.) The wrist lays back violently in this stroke, producing explosive wiping movement as well as improved swing speed.
3) A "slingshot" style (Federer,Nadal) is to allow the forearm to pronate during the racquet drop, and to drag the swing forward during the transition. This is the "wristiest" of the three, and it produces the most wiping action. There's a unique side effect where the arm straightens out, which increases swing speed. Most swings use primarily shoulder rotation to accelerate the hitting arm. However, in this style, elbow/forearm deviation (toward the midline, which is desirable) is also well loaded, so both shoulder and elbow work together to "sling" the hitting arm toward the ball. This enables somebody to produce improved depth and high swing speed without needing to take big cuts at the ball.
In addition to the above, you have two basic forward swing styles -- the default "tucked" version as well as the more glamorous "straight-arm" style. Because a lot of people associate Federer's FH with the straight-arm forward swing, when somebody says "I hit a forehand like Federer's", they're really saying "my FH has a big straight-arm forward swing." However, a lot of players (like Federer) use both, and the forward swing style and the takeback style are interchangeable. Meaning you can hit an impressive straight-arm shot with a basic takeback, and you can have a normal tucked style using a slingshot takeback.
Finally, you have the issue with shoulder orientation. Many people with a pull FH maintain a higher left/front shoulder (Federer, Safin, Haas) through the entire takeback. However, some people (i.e. many of the big flat hitters) like Agassi, Joker, Baghdatis, Roddick, Hewitt, Nalby, and Gonzo (possibly Blake too) start with a higher right/back shoulder, and then let the back shoulder dip back under.
I think this is what some people call a "drive FH", because it enables you to really, really load the shoulder. You can pick up people who use this style, in that at POC, they have a stronger bend in the elbow (given same grip), and they tend to have less wiper movement (again given same grip.) This is not necessarily always the case, though. It's just that in this stroke, you have to make the call whether you want to have a lot of depth and pace with the shot, or a lot of spin with the shot. However, is still a "pull" FH with windshield wiper action.
So, altogether without considering grip or finish, you can break the "pull FH" into 12 different variations.
I've tried both and found that dropping the right arm created more topspin, while not dropping the arm as much (only the racket head) created a bit more velocity but less topspin and lesser net clearance. Not sure which produces a heavier ball.
I'm thinking that you're probably doing step 2. Now it should be noted that most people who believe they're doing a Federer-style FH, are really doing step 2. That's, again, because they primarily concentrate on the straight-arm FH, and step 2 will accomplish Federer's racquet face being parallel to the ground very late in the take-back. It's only when you watch the takeback from the side that you really notice how odd it is, the way the arm does not move in a symmetrical loop (or figure 8) or how the racquet face remains at a certain closed angle through 75% of the racquet drop.
In any case, when swung with step 2, if you try dragging the swing, this will put your forearm at a certain angle that will inhibit the forearm from supinating passively Also, you'll notice that the wrist doesn't lay back as much as it should prior to POC.
Why is his shot not as heavy as it should be? Is it because he dropped his right arm too much at the forward swing (thus, not dragging the right arm aka a flatter swing path)?
Dasto is a really special exception. He's not only a big Federer fan, but he may be the only guy on Youtube who actually succeeded at executing Federer's step 3 takeback. When
he says he modeled his stroke after Federer, it's impressive.
But, for that same reason, he has the opposite problem. Because he's not dragging his swing after the pronated takeback, the scooping motion puts his forearm in a position that will inhibit passive supination during the transition. Also, he doesn't get the benefit of the "slinging" action from the elbow, even though his arm correctly stretched out in the takeback. Instead, what he gets is a forward swing with a big arc, as if he setup a big swing from the beginning. This does deliver power, but it's not the same thing. Had he used a normal traditional takeback, he probably hits the ball bigger and with much more spin.