I am running the os 50 Hyper heli engine in my U-Can-Do 46 and am having a few problems. The power is awsome for the airplane but the engine will not stay running I have had a number of experenced friends try to help one day it runs awsome and othere it just will not stay running. I also am getting flutter in the entire tail when doing a knife edge or have about 3/4 throttle. Should I add support wires? What is the best CG for this airplane? I am working on my hovering skills but need a cg shift. Thank you

run a apc 12.25/3.75 prop don't fly wfo like a pylon racer use new fuel or tune it right the hyper likes 30% cool power best cg 6 back move it back a little at a time what does the engine act like lean cough rich burble or just shutting off for no reason

Hello Britton

We are running the hyper 50s in our UCDs here in San Antonio, we have not had this type of problem in three of them in the area. Have you tried switching your brand of fuel or a new gallon 30%. We have also found that the c/g works really good at 5.75" behind the leading edge. To answer your question about flying wires, flying wires are just about alway's a good idea, however two of us are running 8411s and carbon push-rods without the use of flying wires and have not experienced any flutter. Best of luck with yours.

Bob Sawyer

The engine just dies with out any notice. I have had Byron and Coolpower 30% Helli fuel in it. What fuel are you using? I will have to order it to try. Thanks

After useing WildCat 30% the engine runs awsome. Thank you for your help.