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@Mike Wyatt posted:

Why would anyone WANT to turn off the Odyssey speed control??  Lionel seems to always have an on-off switch for the feature.

I have found that when creating a locomotive "lashup"  with legacy or tmcc.... disabling the odyssey on all but one of the locomotives helps prevent them from fighting each other for contol (particularly on curves).  The tighter the curves,  the more exaggerated this becomes.   It also seems to help prevent thrown traction tires as a result of not fighting each other.  My most recent encounter  with this a was running two identical TMCC Lackawanna Train Masters together.  With odyssey enabled on both, they ran fine on straightaways but fought each other noticeabley on curves (all curves were O72 and larger). Running a locomotive solo, odyssey on is always best.

Last edited by Brian DeFazio
@Mike Wyatt posted:

Why would anyone WANT to turn off the Odyssey speed control??  Lionel seems to always have an on-off switch for the feature.

I would ask that this title be more descriptive.  It might get a better response.

As far as why, some folks do like to run trains without Odyssey especially in conventional.

Last edited by MartyE
@Mike Wyatt posted:

Why would anyone WANT to turn off the Odyssey speed control??  Lionel seems to always have an on-off switch for the feature.

Here's understanding of the story.

The first Odyssey engines sometimes did not run smoothly. They would sometimes lurch upon stating up and sometimes run at inconsistent speeds while under cruise control.  (the Odyssey lurch, it was called).

While Lionel was figuring out how to fix the problem, production batches were fitted with switches which allowed the operator to turn Odyssey off. The switches stayed after the problem was fixed.

Last edited by RoyBoy

If Mike Reagan or Jon Z see this they can explain in better detail but with 1st generation Odyssey two engines could fight each other. Imagine one being slightly faster than the other. The faster one starts pushing the slower one. The slower one senses the increase in speed and tries to slow down resulting in continuous speed variations plus overheating doing this.

Sometime in the mid 2000s the algorithm was changed to fix this but the first solution was to add a switch to turn Odyssey off and running two identical engines without cruise. Not ideal but they ran better that way.   

I have three powered F3s from the early 2000s that do run OK together in Odyssey mode but others with these same engines say theirs don't and can only run them with Odyssey off. A friend says was able to get his to run together by adding a tether wire to tie all engines pickup rollers together so there was no breaks in power.

Pete

Last edited by Norton
@Norton posted:

If Mike Reagan or Jon Z see this they can explain in better detail but with 1st generation Odyssey two engines could fight each other. Imagine one being slightly faster than the other. The faster one starts pushing the slower one. The slower one senses the increase in speed and tries to slow down resulting in continuous speed variations plus overheating doing this.

Sometime in the mid 2000s the algorithm was changed to fix this but the first solution was to add a switch to turn Odyssey off and running two identical engines without cruise. Not ideal but they ran better that way.   

I have three powered F3s from the early 2000s that do run OK together in Odyssey mode but others with these same engines say theirs don't and can only run them with Odyssey off. A friend says was able to get his to run together by adding a tether wire to tie all engines pickup rollers together so there was no breaks in power.

Pete

Thanks for this. I have certainly experienced the Odyssey "lurch" with a couple of TMCC engines but didn't know the reason for the wider issue.

Bu regarding the F3s, wasn't there also an issue about gear ratios being different between a couple of years of manufacture? I have an F3 A-B-A set from about 2003 and a slightly later powered F3 B unit that won't play nicely with them at all. Problem can't be remedied because I understand Lionel used different gears originally intended for F7s in the later engines and no replacement power trucks are available. 

For odyssey engines that do not have the on/off switch, there is a key sequence on the cab-1 or cab-2 you can use to turn odyssey on/ off. 
I do not readily have the sequence with me and hope someone here on the forum can post it. I have it but have to look for it. 

I thought it was a key sequence too but for my Santa Fe Train 18 with no Odyssey switch the sequence involves raising the track voltage, pressing and holding the horn button, then reducing the voltage to 1/4 and releasing the horn button.

https://www.lionelsupport.com/...ents/71-4565-250.pdf

Trouble is this is only in effect until you power down. It has to be repeated for the next power up.

There is a key sequence for TAS EOB and ERR Cruise.

Pete

Last edited by Norton

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