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The new Tornado sport jet

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The new Tornado sport jet

Old 07-09-2020, 11:11 AM
  #3651  
john491
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If it is balanced properly you do not need any elevator trim, except with the flaps. The elevator is trimmed when a straight edge across the TOP surface of the elevator is flush. A bit of down thrust on the turbine as well, about 3-5 degrees. The usually accepted CG is about 13 in. from the leading edge at the fuse.
John
Old 07-09-2020, 11:20 AM
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alasdair
 
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Thank you John,
So I have to make the TOP of the elevator parallel to the flat bottom.
(Not have the elevator bottom lined up with the section underside.)
That's good.
That agrees pretty much with the photos, but is more precise.
Alasdair
Old 07-09-2020, 12:08 PM
  #3653  
joeflyer
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Originally Posted by alasdair View Post
Thank you John,
So I have to make the TOP of the elevator parallel to the flat bottom.
Alasdair
It doesn't sound like you got it.
Re-read John's post. Forget about the bottom. Lay a straight edge on TOP of the stab, along the flat portion towards the rear. Now bring up the elevator until it just touches the strait edge.
Old 07-09-2020, 12:16 PM
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john491
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The methodology is to put a straight edge on top of the horizontal stabilizer and make the elevator flush to that straight edge. This makes it look a little strange from the bottom, but it flies well this way. I can remember reading a post here some while back of a builder that decided the stab should not be built that way and spent quite a bit of time rebuilding the plane to this new configuration ( he flipped the stab over and installed it upside down). I never heard how his flew after all that work. Mine flies very well in this stock setup.
I have a P-60 for power, which makes it scoot pretty well. I don't think it would do well with a smaller turbine.
John

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