Can't hit my new R11 driver.

[Clambake]

Originally Posted by johninspain

To cut a long story short I ended up after a few hours of messing around with an average of 295m carry ball speed of 153mph and launch angle of 12 and spin of 3200 rpm.

Originally Posted by johninspain

I would ask you to elaborate on your answer.  According to the PGA there are over 446 players this year with an average drive distance of over 320 yds carry and that is just players in comps where it is recorded it doesnt take into account club pros, teaching pros, amatures or good club players.   And that is just  a

The only objective numbers here are the ball speed, launch angle, and spin rate.      Taking your ball speed of 153mph would suggest a clubhead speed of around 102-105mph, with 102mph being the theoretical minimum clubhead speed you could swing at and achieve a ball speed of 153 (this would be a 1.5 smash factor).     This club head speed would put you in the low end of Tour players.

Many studies have been done to relate clubhead speed and driver distance, and these studies would put the overall driver distance for such a club head speed at around 260-270 yards (carry + roll).     An example is shown in the data below from a 2006 USGA-sponsored study titled  " EXPERIMENTAL DETERMINATION OF THE EFFECTS OF CLUBHEAD SPEED ON DRIVER LAUNCH CONDITIONS AND THE EFFECTS ON DRIVE DISTANCE FOR BALLS USED BY THE PGA TOUR ".    The different curves are for balls with different coefficients of restitution (a.k.a. different ball types).

The above are for Tour-typical conditions, i.e. optimized launch angle and spin and carry/roll characteristics typical on Tour.     As seen in this data, at your club head speed you are realistically around 265 yards or 242 meters.     Also, as you can see in this data, the longest hitters on Tour need to be achieving club head speeds of over 125mph to get the distances that you're claiming.

As proven in repeated scientific experiments, it is just not theoretically possible to achieve the type of distance the launch monitor is claiming for you given the objective data.     This is a common issue with launch monitors used in golf store fittings - the objective numbers may be correct (speed, spin, angle) but the subjective calculations to estimate distance are often tweaked to better enable selling new clubs.

[johninspain]

no probs guys, to clear it up ill put some picks up or a vid next time im at the fitting bay on trackman !!!!!!  I did get my calculation slightly wrong, its average of 285 meaters whitch is 311 yds

[johninspain]

Originally Posted by Clambake

The only objective numbers here are the ball speed, launch angle, and spin rate.      Taking your ball speed of 153mph would suggest a clubhead speed of around 102-105mph, with 102mph being the theoretical minimum clubhead speed you could swing at and achieve a ball speed of 153 (this would be a 1.5 smash factor).     This club head speed would put you in the low end of Tour players.

Many studies have been done to relate clubhead speed and driver distance, and these studies would put the overall driver distance for such a club head speed at around 260-270 yards (carry + roll).     An example is shown in the data below from a 2006 USGA-sponsored study titled  "EXPERIMENTAL DETERMINATION OF THE EFFECTS OF CLUBHEAD SPEED ON DRIVER LAUNCH CONDITIONS AND THE EFFECTS ON DRIVE DISTANCE FOR BALLS USED BY THE PGA TOUR".    The different curves are for balls with different coefficients of restitution (a.k.a. different ball types).

The above are for Tour-typical conditions, i.e. optimized launch angle and spin and carry/roll characteristics typical on Tour.     As seen in this data, at your club head speed you are realistically around 265 yards or 242 meters.     Also, as you can see in this data, the longest hitters on Tour need to be achieving club head speeds of over 125mph to get the distances that you're claiming.

As proven in repeated scientific experiments, it is just not theoretically possible to achieve the type of distance the launch monitor is claiming for you given the objective data.     This is a common issue with launch monitors used in golf store fittings - the objective numbers may be correct (speed, spin, angle) but the subjective calculations to estimate distance are often tweaked to better enable selling new clubs.

Thanks for the info and to be fair i did go to the range last night and found some degree of discrepency with the track man figures.

[kingofthehill]

Yeah....that about sums it up nicely for me!