Hello magicians.I working on Slydini's helicopter card trick.I think he uses Corneilus and Tenkai Palm Steal but I don't know exactly timing of fan steal and putting on table.Are there anyone who can help me about this routine.

Sure! Purchase The Annotated Magic of Slydini by Lewis Ganson and read it.
Then you will know, not think, how it is done.
Then watch Slydini do it to get a feel for the timing involved.
Warning, it is not something easily done.

"The Master of Misdirection" by Dennis Barlotta &
Allan Ackerman can help you out too.
Also it's not all in the cards, it's a lot of skilly skill.

I second the Ganon book. It's a very good resource for most of Slydini's magic.

It is well explained on the book of lewis ganson. It is now available on pdf form.