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alfolavf(at)online.no
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 Posted: Mon Feb 13, 2006 10:47 am Post subject: Leadweights too light? |
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Hi!
Thanks for the inputs regarding PVC-tube in the wings!
We're done with the empennage now and both elevators are AFT heavy.
On the right one, we adjusted it per plans, but we had to bolt the removed leadpiece back onto the counterweight to get the elevator closer to neutral.
On the left one, we didn't do anything to the counterweight.
I guess we can solve the problem by adding lead in the forward part of the fiberglass tips before installing them.
Have anyone else encountered this?
The only reason I can think of is that we maybe put too much tanksealer in the aft part of the stiffners?? (But I don't think we overdid it....)
Best regards Alf Olav Frog / Norway
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frank.hinde(at)hp.com
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| Posted: Mon Feb 13, 2006 11:04 am Post subject: Leadweights too light? |
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Yeah I got the same thing. Not sure how much of an issue a slightly aft
heavy elavator is and I was going to paint it first and see if I can add
lead afterwards...Haven't thought how to do this though.
Frank
RV7a Final engine connections and then PAINT!
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dan(at)rvproject.com
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| Posted: Mon Feb 13, 2006 11:30 am Post subject: Leadweights too light? |
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Make sure you've got the elevator rigged in final position before coming to
this conclusion. Maybe you did that already. But the point is -- if you
pull the elevator in closer to the HS, the weight distribution changes
relative to the hinge point.
)_( Dan
RV-7 N714D
http://www.rvproject.com
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frank.hinde(at)hp.com
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| Posted: Mon Feb 13, 2006 11:45 am Post subject: Leadweights too light? |
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Thanks Dan...I think its fairly close but I haven't hung the trim tab
servo on yet so it could (and probably is) miles off at present.
Working on the principle that this is one of the last jobs and Must be
easier than some of the other crap I've had to work through.
RV newbie advice coming...Stick with the Bendix servo! unless you really
want a left hand throttle..
Frank
Do not archive
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wgill10(at)comcast.net
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| Posted: Tue Feb 14, 2006 1:49 pm Post subject: Leadweights too light? |
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I too found the lead weight to be too light after installing the pitch
trim servo. To correct, I clamped a piece of sheet metal around the
weight as a form and used a small propane torch to get the center of the
weight molten to within about a 1/4" of the edge, then added lead using
large fishing weights. The weight is just a little heavier than
necessary and will trim as required after painting. Attached are three
pictures comparing the "as is" right elevator weight to the modified
right elevator weight.
Have a great day,
Bill
RV-7 finish
Lee's Summit, MO
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deruiteraircraftservices(
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| Posted: Wed Feb 15, 2006 1:49 am Post subject: Leadweights too light? |
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hi,
if you don't trim the weights, the two combined are heavy enough to
compensate for trim motor and paint.
marcel
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