Author: Clifford Dow <cdowjr@...> Time: Mon Dec 17, 2001 8:06 am PST Link
December 17, 2001
Re: Vertical Stabilizer Rivet Direction – In or Out?
The VS-803PP is the THIN main spar on the VS
The VS-808PP is the THICK piece which lays on the
VS-803PP
The THICK brackets (rudder hinges) then rivet onto the
above VS pieces.
Maybe I missed it in the directions, but does it
matter which way the rivets go on the upper section of
the VS-803PP? (not talking about the flush ones on the
bottom).
My guess is that many would instinctively put the nice
rounded head on the outside – since that’s the only
side one could possibly see – the mashed up side would
then go on the inside (inside the skins – the mashed
up end would be against the THIN VS-803PP.)
I’m no engineer, but from a structural point of view,
I strongly believe the finished product would be
stronger if the mashed up side of the rivet were
against the THICKER metal (the VS-808PP and the
brackets). I believe under high stress, the nice
rivet head would find it harder to pull through the
thin metal than a mashed up rivet end.
I’m very curious to know how most did it?
My kit did not appear to have any AN426AD4-6 or
AN426AD4-7 rivets - anyone else have that problem?
I’m wondering if they put the wrong rivet number on
the VS plans or just forgot them in the kit?
Also, is there anyone in Maine working on an RV-7?
I’m expecting the rest of my quickbuild kit in early
January.
Cliff Dow, Jr.
Cdowjr@Y...
RV-7A builder in Portland Maine.
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Author: "Ron Milligan" <ronmilligan@...> Time: Mon Dec 17, 2001 8:26 am PST Link
I put them all in the same direction, smashed side to the rear (visible).
The only problem I see with that is the smashed rivets heads get in the way
when you try to rivet the skin to the rear spar. Most are workable but the
4 surrounding the middle rudder hinge bracket are tough. Thanks to a lot of
helpful tips on this forum, I have a few ideas to try. Thanks for
everyone's response. If I had it to do over again I would flip them the
other way and put the round head to the rear (visible).
Ron Milligan
N16HN (reserved)
-----Original Message-----
From: Clifford Dow [mailto:cdowjr@y...]
Sent: Monday, December 17, 2001 8:06 AM
To: RV7and7A@yahoogroups.com
Cc: cdowjr@y...
Subject: [RV7and7A] Vertical Stabilizer - Rivet Direction - in or out?
December 17, 2001
Re: Vertical Stabilizer Rivet Direction – In or Out?
The VS-803PP is the THIN main spar on the VS
The VS-808PP is the THICK piece which lays on the
VS-803PP
The THICK brackets (rudder hinges) then rivet onto the
above VS pieces.
Maybe I missed it in the directions, but does it
matter which way the rivets go on the upper section of
the VS-803PP? (not talking about the flush ones on the
bottom).
My guess is that many would instinctively put the nice
rounded head on the outside – since that’s the only
side one could possibly see – the mashed up side would
then go on the inside (inside the skins – the mashed
up end would be against the THIN VS-803PP.)
I’m no engineer, but from a structural point of view,
I strongly believe the finished product would be
stronger if the mashed up side of the rivet were
against the THICKER metal (the VS-808PP and the
brackets). I believe under high stress, the nice
rivet head would find it harder to pull through the
thin metal than a mashed up rivet end.
I’m very curious to know how most did it?
My kit did not appear to have any AN426AD4-6 or
AN426AD4-7 rivets - anyone else have that problem?
I’m wondering if they put the wrong rivet number on
the VS plans or just forgot them in the kit?
Also, is there anyone in Maine working on an RV-7?
I’m expecting the rest of my quickbuild kit in early
January.
Cliff Dow, Jr.
Cdowjr@Y...
RV-7A builder in Portland Maine.
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Author: dc3470@... Time: Mon Dec 17, 2001 12:19 pm PST Link
Cliff,
As far as the direction of the rivets I read somewhere in Van's manual (
they are right ) it was up to the builder although " as you stated " it is
stronger and the industry standard to always put the button head on the side
of the thinner piece.
They also shorted some rivets in my emp kit and sent 2 bags of another but a
phone call later Vans had the shorted rivets on the way with an apology.
Hope this helps,
David,
[Non-text portions of this message have been removed]
Author: "rp10294648" <rpflanze2@...> Time: Tue Dec 18, 2001 5:17 am PST Link
Cliff,
You bring up a couple of good points. My experience is as follows:
1) It doesn't matter which way you orient the rivets. Do what ever
floats your boat. I put the finished head facing aft on mine.
2) IGNORE all the rivet callouts in the plans. I know that this
sounds sacriligious, but it's true. Use a rivet gauge and install
the right rivets that meet the length requirements. You will find
numerous examples where putting in the rivet that is called for will
be too short. You'll just end up drilling em out and replacing
them. I don't know if it's just difference in building techniques,
dimple dies, or whatever. I NEVER bother to look at the rivet
callouts. I just grab my trays of various rivets and I use the one
that works. Perfect rivets every time.
3) If you don't have a rivet cutter, get one. You will also find
places where you are between rivets. One is too short and the other
is just long enough to want to bend over. One of the tricks to
perfect rivets is a rivet that is the correct undriven lenght.
Randy Pflanzer
RV-6 (Sold)
RV-7A (Empennage almost finished)
--- In RV7and7A@y..., Clifford Dow <cdowjr@y...> wrote:
> December 17, 2001
>
> Re: Vertical Stabilizer Rivet Direction – In or Out?
>
> The VS-803PP is the THIN main spar on the VS
> The VS-808PP is the THICK piece which lays on the
> VS-803PP
> The THICK brackets (rudder hinges) then rivet onto the
> above VS pieces.
>
> Maybe I missed it in the directions, but does it
> matter which way the rivets go on the upper section of
> the VS-803PP? (not talking about the flush ones on the
> bottom).
>
> My guess is that many would instinctively put the nice
> rounded head on the outside – since that's the only
> side one could possibly see – the mashed up side would
> then go on the inside (inside the skins – the mashed
> up end would be against the THIN VS-803PP.)
>
> I'm no engineer, but from a structural point of view,
> I strongly believe the finished product would be
> stronger if the mashed up side of the rivet were
> against the THICKER metal (the VS-808PP and the
> brackets). I believe under high stress, the nice
> rivet head would find it harder to pull through the
> thin metal than a mashed up rivet end.
>
> I'm very curious to know how most did it?
>
> My kit did not appear to have any AN426AD4-6 or
> AN426AD4-7 rivets - anyone else have that problem?
> I'm wondering if they put the wrong rivet number on
> the VS plans or just forgot them in the kit?
>
> Also, is there anyone in Maine working on an RV-7?
> I'm expecting the rest of my quickbuild kit in early
> January.
>
> Cliff Dow, Jr.
> Cdowjr@Y...
> RV-7A builder in Portland Maine.
> __________________________________________________
> Do You Yahoo!?
> Check out Yahoo! Shopping and Yahoo! Auctions for all of
> your unique holiday gifts! Buy at http://shopping.yahoo.com
> or bid at http://auctions.yahoo.com