Here is the link for Smiley. I am a recent convert and have one duck with adapters on four Tx's. To date it has worked very well with no detectable range loss. There is a possible advantage with this type antenna in that the lull in the wave propagation is not straight off the end as a standard but that is the strong point. At least this is what the RF engineers types say. This is a possible advangage simply because most of us tend to point the antenna straight at the model.
I am really enjoying this antenna.
http://www.htantennas.com/
Edit forgot to mention the Smileys are tuned for 72 Mhz so depending what band you are on I would suggest you contact them as they supply for many bands beyond RC even.