I don't think I have heard of any Android device that didn't have airplane mode. Can you explain what it is that is your ultimate goal? Is it actually being on a plane or did you want to save battery by turning off the WiFi automatically?
Paul - Your tablet definitely has airplane mode. I previously gave you a link for Sumvision support. This link shows the specs for your tablet. SUMVISION Cyclone Voyager 10.1 - IMEI.info