Combines How wide is the feeder housing the R seriesIJ

Why not go to a 35 inch cylinder. I think this could be done and get more capacity with out enlarging the combine.

A 35 inch cylinder would be odd to the current spacing of the bars etc with the current gleaner machines. 25 inch 8 bars - 31 inch 10 bars - 37.5 inch 12 bars. I assume (maybe incorrectly) that engineering picked the spacing for a reason. I again assume a 25% increase over the R-72 would be a pretty good jump. A 37.5 inch cylinder would be a potential 50% increase - with a 600hp engine and much more weight it could be done - just ahead of the market. A 25% increase may be slightly ahead of the market - but the C11 engine could still provide the power and the increase in frame strength and drive compotents would not have to be such a jump in size and weight. It would be interesting to see a test machine on the current R-75 frame and components with a 31 inch cylinder and cage - maybe modify the cleaning shoe making it a little larger and speeding up the clean grain elevator a notch or two. This is dangerous as it may work and the necessay changes on other components may not be made before going into production. Then give it to a custom operator that covers a variety of small grain and corn_bean crops (to beat it up). best, bill koob

I did not figure the spacing but your diameters make sense. I bet a bigger cylinder would increase capacity without adding that much horsepower. It would thin out the crop while going thru rotor taking less horsepower. You could also change the angle of helical bars so no crop gets rethreshed over concave. It would not require as steep of angle as it does now to keep crop from getting rethreshed. Also while they are at it they could enclose rotor.

The only downside to larger diameter rotor as I see it is that you lose centrifugal force for seperation at the same rasp bar speed. Rotor rpm would be slower. The Case however seems to do well using 30" rotors. The enclosed rotor is about perfected for the Gleaners already in the Sunnybrook rotor. Merry Christmas to all, and to all who helped me with posts during the year, Many Many Thanks!

capacity is one thing, but what about the weightIJ the enlarged rotor and corresponding components would make the machine very heavy. In wet conditions or other, compaction becomes too dominant. Tracks or large 23 inch duals would b e needed on front with large rear tires to minimized the gained weight. Add the capacity of a class 8 or 9 bin, and we have need for a beefed up frame. Is it worth the effortIJ