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The next time you are getting ready to fly your profile, set the carb to your liking, then while holding onto it, point the nose straight up with control surfaces at neutral. Take note to see if your plane tries to pull to it's belly. I was playing around with mine the other day and noticed that three of them do the same thing. If I tip the nose back quite a ways, it will of course, pull to the canopy side. I could see how some up-thrust would stop this, but I wonder if anyone else notices the same thing? Maybe it is a thrust thing? Maybe I need to change something? Comments and suggestions welcome.

Thanks much,

John Wells
 

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Almost all planes do this. That's why a plane appears to be just a hint on it's back to hover still or torque.

I would not set the thrust line based on this, but how the plane actually flies.

This will, however, give you an idea of how much on it's back it needs to be to torque or hover without just being in a really steep harrier. For my profiles, I hold the plane just behind the engine and feel where it tries to settle in verticaly. I then know about how far on it's back it will hover.
 
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