RE: Q 500 getting started
speed is based on your experience.......tt40 is more than adequate. the tt mufflers have a habit of falling apart generally as a result of the central bolt breaking- caused I believe by three things firstly an out of balasnce prop, maybe a non rigid mount and lastly the bolt has been done up too tight after someone has taken the baffle out. Don't forget we are running the engine/muffler on 9x6 props or simial- producing revs higher than the design intention and any inaccuracy something will break . I have run three tt46 with no problems to the muffler bolt- caresfull balancing of the prop AND spinner, and leave the baffle in regards trevor h