RE: Thunder Tiger F54-S Problem
Hi!
All engines today are good engines ! There isn't a manufacturer around today that makes "bad" engines.
If you want an engine to run well you have to give it what it wants.
All engines like nitro so give them nitro! 5"-10% is what all engines need! 15% or more is just overkill.
Never ever try to run a four stroke (except a Lazer) without nitro!!
Use the "correct" glow plug! The OS F plug or the one supplied by the manufacturer.
Use the "correct" propeller. For a .54 four stroke that means a prop that loads the engine to ...let's say, no more than 10000 rpm at full throttle. A 12x6 or 13x4 APC prop are good props to use for most planes.
Use the "correct" fuel!
Over here in Europe it's very common to use fuel containing only 10%-15% all synthetic oil (Castor oil is seldom used). Of course more oil could be used too but it isn't necessary in any way!
Many of us mix our own fuel but ready-made fuel is available in all hobby stores. See to that you get fuel containing at least 5% nitro.