Today's Message Index:
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1. 06:34 AM - Re: Balancing the Elevators (manuel weber)
2. 09:19 AM - Re: Re: Balancing the Elevators - Ans from Vans (manuel weber)
Message 1
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| Subject: | Balancing the Elevators |
On most aircraft, the service information will outline a fairly narrow window for
balance criteria, and this can be either positive, negative, or neutral.
I am very suprised there is nothing in the plans or instructions for the RV-8,
unless "balanced" means "neutral" and there is no tolerance.
Carl Froehlich <carl.froehlich@cox.net> wrote:
I asked Vans about this several years ago and got a no opinion
response.
I would say the amount of weight difference here can be characterized as cosmetic.
I just did not like the droopy elevator look when parked.
Carl
From: owner-rv8-list-server@matronics.com [mailto:owner-rv8-list-server@matronics.com] On Behalf Of manuel weber
Sent: Wednesday, May 28, 2008 5:57 PM
Subject: RE: RV8-List: Balancing the Elevators
I am assuming, since i could not find the balance criteria in the plans, that
the balance values are "zero" for all surfaces?
Is this correct?
Is it safe to fly the aircraft with some positive balance (trailing edge up
for paint compensation) ?
Carl Froehlich <carl.froehlich@cox.net> wrote:
I did each separately as it was just as easy as doing it connected.
Recommend leaving enough weight on to have the elevator trailing edge up.
You will need this to compensate for paint (not an insignificant weight change
as it is all aft of the hinge point). I ended up adding weight back after painting
and then fixing the paint job where I cut into the elevator fairing.
Carl Froehlich
RV-8A (425 hrs)
RV-10 (flaps)
From: owner-rv8-list-server@matronics.com [mailto:owner-rv8-list-server@matronics.com] On Behalf Of Vince-Himsl
Sent: Tuesday, May 27, 2008 7:10 PM
Subject: RV8-List: Balancing the Elevators
Hello,
Does one balance each Horizontal Stabilizer section separately (trim the lead
weights) or as a completed unit connected to the push rods and control column.
Thanks,
Vince H.
RV-8 (Glacier built) Registered and in hanger for final assembly.
http://www.matronics.com/Navigator?RV8-List
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Message 2
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| Subject: | Re: Balancing the Elevators - Ans from Vans |
Balancing the surfaces individually is the industry standard and makes some sense
as far as physics is concerned....
The dynamics involved, and I only understand it on a very limited level, can
be affected if you balance the surfaces as an assembly. ie, if one is way under
balance and you compensate by adding weight to the other surface.
My opinion is to balance separately.
ptrotter@optonline.net wrote:
Interesting, when I asked Vans the same question they said not to bother balancing
them seperately, just do them together. I guess it depends on who you
talk to there.
Paul
----- Original Message -----
From: Vince-Himsl
Subject: RE: RV8-List: Balancing the Elevators - Ans from Vans
> Received this from Van's
>
>
>
> The elevators should be balanced individually - disconnect them
> from the
>
> pushrod and each other. The lead weight will probably be too
> heavy and you
>
> will need to remove some of it. However, if you have not painted
> the
>
> elevators leave the weight about 2-3 oz too heavy so they will balance
>
> when
>
> painted. It is better for the lead weight to be too heavy than
> too light,
>
> but it is
>
> not critical.
>
>
>
> vans
>
>
>
> Thanks to all
>
> Vince H.
>
> RV-8 Glacier Built
>
> Moscow, ID
>
> _____
>
> From: owner-rv8-list-server@matronics.com
> [mailto:owner-rv8-list-server@matronics.com] On Behalf Of manuel weber
> Sent: Wednesday, May 28, 2008 2:57 PM
> To: rv8-list@matronics.com
> Subject: RE: RV8-List: Balancing the Elevators
>
>
>
> I am assuming, since i could not find the balance criteria in
> the plans,
> that the balance values are "zero" for all surfaces?
>
>
>
> Is this correct?
>
>
>
> Is it safe to fly the aircraft with some positive balance
> (trailing edge up
> for paint compensation) ?
>
> Carl Froehlich wrote:
>
> I did each separately as it was just as easy as doing it connected.
>
>
>
> Recommend leaving enough weight on to have the elevator trailing
> edge up.
> You will need this to compensate for paint (not an insignificant
> weightchange as it is all aft of the hinge point). I ended up
> adding weight back
> after painting - and then fixing the paint job where I cut into
> the elevator
> fairing.
>
>
>
> Carl Froehlich
>
> RV-8A (425 hrs)
>
> RV-10 (flaps)
>
>
>
> From: owner-rv8-list-server@matronics.com
> [mailto:owner-rv8-list-server@matronics.com] On Behalf Of Vince-Himsl
> Sent: Tuesday, May 27, 2008 7:10 PM
> To: rv8-list@matronics.com
> Subject: RV8-List: Balancing the Elevators
>
>
>
> Hello,
>
>
>
> Does one balance each Horizontal Stabilizer section separately
> (trim the
> lead weights) or as a completed unit connected to the push rods
> and control
> column.
>
>
>
> Thanks,
>
>
>
> Vince H.
>
> RV-8 (Glacier built) - Registered and in hanger for final assembly.
>
>
>
>
>
>
>
> http://www.matronics.com/Navigator?RV8-List
> http://forums.matronics.com
> http://www.matronics.com/contribution
>
>
>
>
>
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