duh,
There have been experimenting on real time video links with RC-planes. But it's not particularly practical and it might be also dangerous due to speeds of this type planes (around 150km/h).
Angus,
This type of RC-planes are usually designed for quite high loading factors, say 20g or more. So generally the aerodynamic limits are reached earlier than structural limits. Most of structural problems I have seen with fast gliders ("warm/hot liners" or what ever) are flutter related.
gripen