Torum 760

[crking]

There was a 760 cutting up north of Brooks today, 45ft MD header infront of it. Wasnt really moving all that fast.

[cliffcutter]

At Big Iron today I talked to a source who told me they do indeed have 3 demo units (2 in Louisiana and 1 in Canada) ,it's a birotor with counterrotating components and will be for sale for Fall 2012 harvest. Other than that he didn't have much info.

[crking]

From the road, the unit looked not bad. But not moving fast...... maybe running 2 mph?

[sport6]

I just saw one yesterday heading from down south back to canada. I saw it at a truck stop in Fargo, ND and I did take some pictures of it.

[luxford8]

just going by the pictures - there seems to be a strap going over the cab - to hold it on or stop it blowing off or ??


im guessing build quality maybe an issue then?

[bussard]

RUMMOR HAS IT, it was against the s690 and it was running the same capacity, till the s690 needed a fire truck!!

[luxford8]

Originally Posted by bussard

RUMMOR HAS IT, it was against the s690 and it was running the same capacity, till the s690 needed a fire truck!!

running the same capacity fuel tank maybe..

[greenpower]

I saw one Sunday northbound on I-29, and he was hauling azz making up time.

I have been running 1.5-2 mph in down corn with my 9670 and 612, so I know what slow is!

[whatswrong]

Originally Posted by primer

I'm going to be VERY interested to see the price on these when they come here. We're in the market for a new combine and wouldn't be afraid to demo one if we get the chance. We really like our New Holland, but this could be interesting.

"Primer" ,Was your favorite Versatile ,NH dealer at the unveiling in Texas do you anticipate them carrying them.

[farmbuddy]

The Torum 740 being tested around Columbus, Indiana last year, 2011, had a counter rotating concave, just turning about 7 RPM. Perhaps their objective was really test the Cummins engine power and cooling capabilities. IMO, several aspects of the XBR2 bi-botor has better features than the Torum. For instance, (1) XBR2 had nylatron front bearing ring, (US Patent 5779542 Issued 14 July 1998) instead of noisey steel rollers which tend to quit turning due to metal on metal contact., (2)XBR2 had single rear cage mounting bearing instead of rear steel rollers on the Torum. (3) XBR2 had rear end mounted cage drive, instead of mid cage drive chain as used on the Torum, which results in bending fatigue with each rotation of the concage. (4) Biggest difference on the XBR2 is that it had co-rotation concave, instead of the Torum counter rotation concave cage. IMO - You can achieve more "aggressive threshing" with counter rotation, but this also causes poor feeding and reduced separation performance.

The discovery of the benefits of co-rotation concaves were made during the early testing of Mark Underwood"s Bi-Rotor concepts at Kansas State University back in 1980s. That was done with a 2/3 scale model of the rotor and concave. For those lab test, wheat bundles / crop was fed into it with a silage conveyor about 100 ft. long. As I recall, the rotor was powered with a small 8N Ford tractor, the cage was worm gear driven with a reversible electric motor. First trial attempts using counter rotation resulted in crop piling up and swirling in front of the rotor and concave intake area.
The crop that did feed in, did not separate very well.
The change to co-rotation gave immediate improvements in feeding and separation. From that point forward, the counter rotation patent 4489733 was abandoned, replaced by US Patent 5045025 Issued 3 Sept 1991..... and the Bi-Rotor team never looked back. I'd have to search the Dream Reaper book, (if I get a rainy day) as I think the details of this co-rotation discovery are told some place within the early chapters of the Dream Reaper book.
It would be easy enough to measure results with the Birotor concave held stationary, or even counter rotating,..... but seeing the impressive results with co-rotation in full size lab test and in the fields with NH test equipment, ... there never was any subsequent question or desire to compare stationary or even counter rotation concaves. IMO - Physically it would be easy to test various directions and speeds....... just lock up the cage drive in neutral, or change worm gear drive pitch or pulley direction for the cage drive.

I'd have to dig back through my Bi-Rotor storage unit to find a some of the test reports. Overall, Agri-Technology LP had a lot of test data with various concave and rotor configurations, cone shapes, cone angles, and cage RPMs. It will be interesting to see what configuration Versatile introduces to the NA market. I'd like to see the bi-rotor system in production, but I doubt thst Versatile can be successful using the counter-rotation concave configuration that was being demonstrated during 2011. It looked more like the original Whitey / modified 1680 rather than the advances incorporated into the 1993 construction of the XBR2 Bi-Rotor.