ORIGINAL: IAMKAOS
there is a 1/2 arf sold thru sig and shopotron called a ucan2. i have one with a norvel 0.61 on it. it flies but it really was designed for the 0.74. your 0.49 would not really be enough power for it though.
I converted this to electric. GWS 2208 18t 11.1V 1250 LIPO. Great combination! (especially since I got this for next to nothing from a friend!)
I would be surprised if it was too much for an .049.