I see there are no replies to my question so perhaps I could ask those who fly transport aircraft in general:...
What is a reasonable time for reverse thrust selection & depoyment after touchdown?
I note that there are some mechanical and electronic "gates" on all aircraft which the selection of reverse thrust must go prior to physical deployment of the reversers and ability to increase thrust post-deployment. Given this, the selection > availability of reverse isn't going to be say, one second. But should it be less than say, 8 seconds for example?
In-flight Performance Advisory Information (for Boeings) assumes the use of reverse thrust but the timing isn't mentioned, (although I haven't yet checked certification standards).
Thanks.