I cannot find a link that allows me to post a question to the RC site. How do I do it?

I don't understand. It looks to me that this thread is exactly what you say you cannot do. I must be misunderstanding you.

It appears this message is in FAQ site. I would like to post, not in this site, but in RC airplanes site. When I go to the RC aircraft site I find postings but I do not find a way to make a new post there.
Larry

if it is a new post you want to make, you can use the "new thread" button at the upper left of the screen. If you want to reply to a post that someone else started, you can use the "post reply" button, or scroll to the very bottom of the screen, and you will see a "quick reply" box. When done typing, just click on the "OK" button.