Can a legacy gp7 and the new legacy sd50 be lashed up?
Original Post
Replies sorted oldest to newest
Charlie,
Yes they can. The only lash up issues I have heard of is trying to run switchers with road diesel engines. This is due to the different gearing between road and switcher engines. I have run steam and diesel lash ups too but again only road engines with road engines, switchers with switchers.
JohnB
The easy test is to put them on the same track a few inches apart. Create your lashup and power them up. If they run together at about the same speed, you’re good. If one runs away or runs into the other, do not run them together.
Thank you, it worked great. Pretty cool how you can do that.
@JohnB posted:Charlie,
Yes they can. The only lash up issues I have heard of is trying to run switchers with road diesel engines. This is due to the different gearing between road and switcher engines. I have run steam and diesel lash ups too but again only road engines with road engines, switchers with switchers.
JohnB
Actually, if you configure the switchers properly in the engine type, they will lash up with road engines. Legacy is smart enough to synchronize them if it knows what type it's dealing with.
@gunrunnerjohn posted:Actually, if you configure the switchers properly in the engine type, they will lash up with road engines. Legacy is smart enough to synchronize them if it knows what type it's dealing with.
That’s good to know, Thanks John
@gunrunnerjohn posted:Actually, if you configure the switchers properly in the engine type, they will lash up with road engines. Legacy is smart enough to synchronize them if it knows what type it's dealing with.
I have a similar question... Command Control is fairly new to me getting back into the hobby a couple years ago. Base3 and WTIU are the first system I'm using besides the Bluetooth or DCS Explorer. Starting playing around with the Base3 Lash Ups, created a train with lead being ES44(2433471) and tail SD70MAC(2233032) seemed to work fine, but out of curiosity I did what Danr above advised, run them a few inches apart.
Noticed the ES44 started to pull away ever so slightly and after about one trip around the loop there was a significant difference between the two. Tried changing the momentum and that did not make a difference other than on the high momentum setting the SD70MAC would run into the back of the ES44 and you can hear the SD70 wheels pushing. This is only on the high setting, low and medium the SD70 stops, but does make up that distance it lost to the ES44, but does not run into it.
Maybe this is normal and since I do not have experience with the command system it's nothing to worry about. I wasn't sure if the Lionel engines being from different years or what made a difference with lash ups. I just do not want to damage the motors.
I do have a couple more of the ES44's, I was going to try out to see if I have the same results just have not had a chance to try it out yet.
Define significant difference. If it's a foot or two over at least 70-80 feet of travel, that's not really significant and it's no problem. OTOH, if it's ten feet over 70-80 feet of travel, that's a problem. Generally, I figure if the difference in speed is less than 3-4%, it's going to be fine.
@gunrunnerjohn posted:Define significant difference. If it's a foot or two over at least 70-80 feet of travel, that's not really significant and it's no problem. OTOH, if it's ten feet over 70-80 feet of travel, that's a problem. Generally, I figure if the difference in speed is less than 3-4%, it's going to be fine.
It's just a small loop of O54 5'x8'. If the couplers are touching when they leave by the time they get back around could be 6-8" between them. Speed on the Cab app 20-30 mph.
On a small loop with tight corners, that's perfectly normal. Speed control isn't perfect, and curves introduce some slip in the wheels which will change the spacing. I don't see any problem with that performance. Call it 25 feet of track total, you're only off by a couple percent in speed.
