Today's Message Index:
----------------------
1. 04:17 AM - Re: fin (Chenoweth)
2. 06:09 AM - Re: fin (Harold)
3. 06:59 PM - Re: fin (Bill Repucci)
Message 1
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Harold,
Sorry for the delay in thanking you for the advice. I ended up
discussing the situation with Van's. Their position was that it had to
be straight. The suggestion was to raise the rear spar (since mine is a
tailwheel version I could only do that about 1/16 due to edge margin
issues) and/or to trim some off the 981 front bracket. I ended up doing
both plus filing some off the top hinge brackets so they were the same
dimension from hole to aft edge as the two lower ones so that the
straight edge technique would produce accurate results. After all that
I'm between .005 off to absolutely straight. Van's said the .005 was
close enough. Haven't drilled yet.
Bill
----- Original Message -----
From: Harold Kovac
To: rv9-list@matronics.com
Sent: Sunday, April 29, 2007 10:01 PM
Subject: Re: RV9-List: fin
Hi Bill,
I checked mine with a drilled acorn/cap nut, string thru the drilled
hole with a weight.
Mine came out with about a 1/64th" off center error.....seems easier
than a straight edge & worked with flaps too.
Harold, RV9A Fuselage wiring
----- Original Message -----
From: Chenoweth
To: rv9-list@matronics.com
Sent: Sunday, April 29, 2007 7:21 PM
Subject: RV9-List: fin
Let me start with the questions first and then the story.
The question: Is the rear spar of the fin straight enough when a
straight edge laid along the hinge brackets is aft of the center one by
about 1/32 inch?
How about if it's out of line by more than 5/64 but less than 3/32?
These are apparently my two choices.
The story:
If I mount the fin per the drawing, front spar ahead of hold-down
bracket and fin pushed forward so that the hold-down bracket just
contacts the flanges on the fin's bottom ribs, the rear fin spar is
firmly against the 712 bulkhead but the out of true is the over 5/64
amount I mentioned above. Which, by the way, is the amount it turned
out to be out of true when I built it. At that point the rudder seemed
to work ok with it.
If, however, I mount the fin with the forward spar behind the
hold-down bracket and with the bracket just touching the flange of the
fin's bottom rib, the rear fin spar does not seat against the 712 - it's
about 1/32 aft of it at its top. But I get the less than 1/32
out-of-true measurement in the hinge line. Based on the way I'm making
the up elevator stop having the rear fin spar not contact the 712 is not
a problem because I can position the stop slightly aft to make good
contact with the spar and still have it function properly with the
elevator horns.
Any answers/comments you'd care to make would be very much
appreciated.
Bill
RV9
Albion, Maine
href="http://www.matronics.com/Navigator?RV9-List">http://www.matronics
.com/Navigator?RV9-List
href="http://forums.matronics.com">http://forums.matronics.com
-------------------------------------------------------------------------
-----
4/22/2007 8:18 PM
Message 2
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Hi Bill,
Sounds as if your accuracy was superior to mine. You must do good work.
Harold
----- Original Message -----
From: Chenoweth
To: rv9-list@matronics.com
Sent: Wednesday, May 02, 2007 7:16 AM
Subject: Re: RV9-List: fin
Harold,
Sorry for the delay in thanking you for the advice. I ended up
discussing the situation with Van's. Their position was that it had to
be straight. The suggestion was to raise the rear spar (since mine is a
tailwheel version I could only do that about 1/16 due to edge margin
issues) and/or to trim some off the 981 front bracket. I ended up doing
both plus filing some off the top hinge brackets so they were the same
dimension from hole to aft edge as the two lower ones so that the
straight edge technique would produce accurate results. After all that
I'm between .005 off to absolutely straight. Van's said the .005 was
close enough. Haven't drilled yet.
Bill
----- Original Message -----
From: Harold Kovac
To: rv9-list@matronics.com
Sent: Sunday, April 29, 2007 10:01 PM
Subject: Re: RV9-List: fin
Hi Bill,
I checked mine with a drilled acorn/cap nut, string thru the drilled
hole with a weight.
Mine came out with about a 1/64th" off center error.....seems easier
than a straight edge & worked with flaps too.
Harold, RV9A Fuselage wiring
----- Original Message -----
From: Chenoweth
To: rv9-list@matronics.com
Sent: Sunday, April 29, 2007 7:21 PM
Subject: RV9-List: fin
Let me start with the questions first and then the story.
The question: Is the rear spar of the fin straight enough when a
straight edge laid along the hinge brackets is aft of the center one by
about 1/32 inch?
How about if it's out of line by more than 5/64 but less than
3/32?
These are apparently my two choices.
The story:
If I mount the fin per the drawing, front spar ahead of hold-down
bracket and fin pushed forward so that the hold-down bracket just
contacts the flanges on the fin's bottom ribs, the rear fin spar is
firmly against the 712 bulkhead but the out of true is the over 5/64
amount I mentioned above. Which, by the way, is the amount it turned
out to be out of true when I built it. At that point the rudder seemed
to work ok with it.
If, however, I mount the fin with the forward spar behind the
hold-down bracket and with the bracket just touching the flange of the
fin's bottom rib, the rear fin spar does not seat against the 712 - it's
about 1/32 aft of it at its top. But I get the less than 1/32
out-of-true measurement in the hinge line. Based on the way I'm making
the up elevator stop having the rear fin spar not contact the 712 is not
a problem because I can position the stop slightly aft to make good
contact with the spar and still have it function properly with the
elevator horns.
Any answers/comments you'd care to make would be very much
appreciated.
Bill
RV9
Albion, Maine
href="http://www.matronics.com/Navigator?RV9-List">http://www.matronhre
f="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/Navigator?RV9-List">http://www.matronics
.com/Navigator?RV9-List
href="http://forums.matronics.com">http://forums.matronics.com
-------------------------------------------------------------------------
---
Edition. 4/22/2007 8:18 PM
Message 3
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Bill,
Don't forget that you have to trim the front spar before installing it.
For some reason Van's doesn't mention this until after you have built
the VS. It is anyone's guess as to why then but it would be easier to
do before riveting that thing together.
Bill
-----Original Message-----
From: owner-rv9-list-server@matronics.com
[mailto:owner-rv9-list-server@matronics.com] On Behalf Of Harold
Sent: Wednesday, May 02, 2007 9:09 AM
Subject: Re: RV9-List: fin
Hi Bill,
Sounds as if your accuracy was superior to mine. You must do good work.
Harold
----- Original Message -----
From: Chenoweth <mailto:chenoweth@gwi.net>
Sent: Wednesday, May 02, 2007 7:16 AM
Subject: Re: RV9-List: fin
Harold,
Sorry for the delay in thanking you for the advice. I ended up
discussing the situation with Van's. Their position was that it had to
be straight. The suggestion was to raise the rear spar (since mine is a
tailwheel version I could only do that about 1/16 due to edge margin
issues) and/or to trim some off the 981 front bracket. I ended up doing
both plus filing some off the top hinge brackets so they were the same
dimension from hole to aft edge as the two lower ones so that the
straight edge technique would produce accurate results. After all that
I'm between .005 off to absolutely straight. Van's said the .005 was
close enough. Haven't drilled yet.
Bill
----- Original Message -----
From: Harold <mailto:kayce33@earthlink.net> Kovac
Sent: Sunday, April 29, 2007 10:01 PM
Subject: Re: RV9-List: fin
Hi Bill,
I checked mine with a drilled acorn/cap nut, string thru the drilled
hole with a weight.
Mine came out with about a 1/64th" off center error.....seems easier
than a straight edge & worked with flaps too.
Harold, RV9A Fuselage wiring
----- Original Message -----
From: Chenoweth <mailto:chenoweth@gwi.net>
Sent: Sunday, April 29, 2007 7:21 PM
Subject: RV9-List: fin
Let me start with the questions first and then the story.
The question: Is the rear spar of the fin straight enough when a
straight edge laid along the hinge brackets is aft of the center one by
about 1/32 inch?
How about if it's out of line by more than 5/64 but less than 3/32?
These are apparently my two choices.
The story:
If I mount the fin per the drawing, front spar ahead of hold-down
bracket and fin pushed forward so that the hold-down bracket just
contacts the flanges on the fin's bottom ribs, the rear fin spar is
firmly against the 712 bulkhead but the out of true is the over 5/64
amount I mentioned above. Which, by the way, is the amount it turned
out to be out of true when I built it. At that point the rudder seemed
to work ok with it.
If, however, I mount the fin with the forward spar behind the hold-down
bracket and with the bracket just touching the flange of the fin's
bottom rib, the rear fin spar does not seat against the 712 - it's about
1/32 aft of it at its top. But I get the less than 1/32 out-of-true
measurement in the hinge line. Based on the way I'm making the up
elevator stop having the rear fin spar not contact the 712 is not a
problem because I can position the stop slightly aft to make good
contact with the spar and still have it function properly with the
elevator horns.
Any answers/comments you'd care to make would be very much appreciated.
Bill
RV9
Albion, Maine
href="http://www.matronics.com/Navigator?RV9-List">http://www.matronhref
="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/Navigator?RV9-List">http://www.matronhref
="http://forums.matronics.com">http://forums.matronics.com
_____
Edition. 4/22/2007 8:18 PM
href="http://www.matronics.com/Navigator?RV9-List">http://www.matronics.
com/Navigator?RV9-List
href="http://forums.matronics.com">http://forums.matronics.com
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