lou i went online and found the dl50 web site i do not know if it is the wright one but i compared it to the fuji 50 , there is about the same hp and rpm so they say but the dl 50 is a pound less in weight. what oil are you using in the dl50 , is there any unburend oil residue comming from the exaust , i am at 50 to 1 synthitic and oil is slightly leaving a mark the bottem of the plane from unburned oil , is that normal this is my first gas plane and i do not know and i do not have any one here to ask.