Subtopic: Functional requirements, principles of working, construction and operation of manual, animal, tractor and renewable energy operated equipment for tillage, sowing, planting, fertilizer application, inter-cultivation, spraying, mowing, chaff cutting, harvesting and threshing
Question Statement:
The reel index ($K$) of a combine harvester header reel is defined as the ratio of:
Options:
(A) Linear peripheral speed of the reel bat ($v_r$) to the forward travel speed of the combine ($v_f$)
(B) Forward speed to cutterbar knife speed
(C) Reel diameter to cutterbar width
(D) Number of reel bats to reel RPM
Answer Key:
A
Step-by-Step Solution & Explanation
Reel index $K = v_r / v_f$. For clean crop feeding into the cutterbar without knocking grain to the ground, $K$ is maintained between $1.25$ and $1.50$.