On Sunday, April 27, 2014 7:23:16 PM UTC-4, SoaringXCellence wrote:

Actually the FAA has no specific height limit for model aircraft.

That said, the FAA does advise in ac91-57:

"Do not fly model aircraft higher than 400 feet above the surface."

http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/1acfc3f689769a56862569e70077c9cc/$FILE/ATTBJMAC/ac91-57.pdf