GTT Timing Chain Adjustment

[Engraver]

I'm a new recumbent tandem rider, Greenspeed GTT. I changed my pedals so they were out of phase by 90 degrees last night by loosening the boom. My quesiton now is how tight the timing chain should be? I pulled it very tight. I noticed in this thread that you mention the chain should have a 1/2 inch of play. Is that 1/2 inch in either direction, or total? Would that also apply to my bike?

Thanks

[BlazingPedals]

I'm not sure, but I'd think that 1/2 inch in each direction would be fine. You're not trying to take out all the slack, you're just keeping it from slapping around and derailing itself.