Quarter sawn wood has an amazing straight grain pattern that lends itself to design. Quarter sawn lumber is defined as wood where the annular growth rings intersect the face of the board at a 60 to 90-degree angle. Flecking is also present in red oak and white oak.
Very easy with a swing blade sawmill. Yellow represents a series of vertical cuts above the heart of the log. Green represents a series of horizontal cuts through the heart. Purple indicates a series of vertical cuts under the heart. In total the sawmill has been lowered 6 movements to produce the quartered boards.
You will recover some rift boards at each corner, the bulk will be quality quarter sawn boards. The swing blade does not require the log to be turned or re-handled many times to achieve this.
Although quarter sawn timber will yield stronger structural timber, the negative is if you are sawing extremely stressed logs you will sometimes encounter significant crook. The boards tend to bow out like a banana from the heart. Typical secondary process when confronted with this issue is to re-saw straight once the timber is dry.
There are many other techniques to maximize recovery of quarter sawn boards, however this is the simplest technique as it reduces sizing increments.