Particularly with today’s modern Scandi lines…
There is no need accelerate a flat V loop in order to create high line speed on the forward cast.
Its true: All we need to produce high line speed is a healthy V loop. A healthy V loop Is void of any and all slack. Actually I’ve produced some pretty saggy V loops or D loops on video that have supplied plenty of line speed and distance…still
Its a bad idea to have slack in a V loop or A D loop..
…because its not healthy and translates to wasted energy in the cast. So Full tension is the goal. Good timing, proper rod tip path, correct speed and acceleration, are what makes for a healthy, Tight, V loop.
I like to lift slow, across my body towards the target and just high enough so when I begin my sweep the water does not have too tight of a grip to release my line without much effort. Too high of a lift may require a steep tip on the sweep, which could cause the water to loose its grip on the line too early.
Rod tip path
The rod tip path during the sweep must go from low to high. The rod tip path basically draws the bottom leg of your V loop. A very slight dip is OK, because that can still give you time to gradually draw the rod tip up gradually and smoothly throughout the rest of the sweep creating that nice inclined plane of the bottom leg of the V loop.
Too much dip, in the sweep often caused by of too high of a lift, creates a hump in the line during the sweep if the water lost its grip on the line too early, followed by a sharp rise in the sweep which can cause a very funky anchor. Or what Simon Gawesworth refers to as a bloody L which is basically an extremely crooked anchor that will not come out of the water clean and will rob you of energy in the forward cast.
For the leader, sink tip and fly to come out of the water clean, I want it straight and aligned toward the anchor.
I want a very smooth anchor so if I accelerate at all during the sweep, it is buttery smooth and relaxed. It lands fly first, straight and soft. There is not panic in the sweep. It is calculated and precise. I want the fly out in front of me. I don’t want the path of the cast to cross over the top of the fly, but pretty much as close as it can come without colliding.
The forward cast is an entire subject itself. But I always want both hands in front of me, I want to initiate the forward cast with the bottom hand, while the top hand moves forward and down and the bottom hand moves in an arch towards my body, either my upper hip if I’m going totally underhand. Or higher up, like my belly. I want both hands to work together, but against each other to get the most advantage of the fulcrum, For a short Scandi forward stroke the bottom hand will travel further than the top. Acceleration is smooth to a high stop.
The rod tip path must be straight throughout the forward cast because a straight cast with high line speed is optimal If the situation calls for distance.