where can I purchase a gas powered remote controlled airplane /helicopter?
You can buy a gas powered remote controlled helicopter on the internet at a site like Amazon. You can get a Walkera V18G01 6 Channel Gas Powered RC Helicopter RTF for $685. Read more: www.amazon.com/Walkera-Channel-Powered-RC-Helicopter/dp/B0076VJXS6.
Hobby store or look online maybe ebay or other hobby stores online by a cheap one first cause they are hard to fly and can get expensive