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However I do have another worry now concerning thrust lines: we had another go at flying my SR177 at Merryfield on Wednesday and the low exhaust again caused it to violently and uncontrollably pitch up on launch. The P1154 also has a low thrust line complicated by the interaction with the wing, so I’ll going to add a few degrees of up thrust alignment to the exhaust duct, which should keep the nose down………well that is the theory!
This is where I struggled to get what you meant but that is because in my head I am thinking ah ha a little downthrust should sort that as I tend to think of what I am doing to to exit of the duct to get the effect. I.E. I want to push the tail up and the nose down so I need down thrust out of the duct the reaction of which is upthrust, so two ways of thinking about the same thing, I will have to watch that one in the future.
Looking good mate! Jeez, you build fast! Mental note - must pull finger on my Hunter!
This thread is exactly what I need. I'm switched on, tuned in baby yeah!Had you considered a FG fuse formed over styrofoam then released? You ducting looks fantastic and helps to answer a lot of questions. Subscribed.Shane