how do I display an image from a rails app in another site?

I have a rails app with some images uploaded with file_column

the url of one of the images is http://soccertackle/image/image/189/supertramp-thumb.jpg.
When I type this into a browsers address bar I can see the image.
However when I try to display this image on another site using HTML
<img src="http://soccertackle/image/image/189/supertramp-thumb.jpg" />
no image is displayed.

does this have something to do with the public directory?

I would be very grateful if anyone can give me any advise. Thank you.

Your problem might be hotlink protection. If the server hosting the
image sees that the HTTP referral is another site, it may ignore the
request.