Today's Message Index:
----------------------
1. 07:00 AM - Re: RV6-List: RV fuselages (Jim Oke)
2. 08:26 AM - For Sale: RV7 wing and tail kits (Jared Boone)
3. 05:33 PM - Too short rivets ? (Kent Sorensen)
4. 06:29 PM - Re: Too short rivets ? (Dana Overall)
5. 09:22 PM - 7A Landing Gear Mount (Karie Daniel)
Message 1
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| Subject: | Re: RV6-List: RV fuselages |
--> RV7-List message posted by: Jim Oke <wjoke@shaw.ca>
This goes back to differences in the basic wing structure. The -6 wing spars
extent to the centre line of the aircraft and mate there with splice plates,
etc. Thus, due to the wing dihedral angle, the fuselage bottom has to have
a vee shape to accommodate the spars with minimum waste space.
The -7, -8, -9 all use a three part spar with a centre section and left and
right joins just at the fuselage side. The centre section can be made
straight and so the fuselage bottom can be built flat.
I think Vans should be commended for some clever design and parts
standardization to keep inventory and costs down. This plus the introduction
of CNC manufacturing is what makes the newer RV kits such an outstanding
value while still allowing Vans to make a decent profit (at least I hope he
is). Thus we all benefit.
Jim Oke
RV-3
RV-6A
Wpg., MB
----- Original Message -----
From: "Dean Psiropoulos" <deanpsir@easystreet.com>
<rv6-list@matronics.com>
Subject: RV6-List: RV fuselages
> --> RV6-List message posted by: "Dean Psiropoulos"
<deanpsir@easystreet.com>
>
> The RV-7 and RV-9 fuselages are identical Konrad. Thats how Van's keeps
his
> prices (and inventory) so low. In case you didn't realize it, the RV-7 is
> an RV-9 fuselage mated to the aerobatic wings and tail of the RV-8. I
> suspect the RV-6 fuselage is also the same dimensions at the firewall so a
> -6 cowl should fit on the -7 and -9. It's the wing mounting structure and
> Vee shaped forward fuselage bottom that are different on the RV-6 (RV-7/9
> fuselages have a flat bottom under the wing spar carry through
structure)...
> along with a few other subtle changes that make the RV-7 and 9 parts able
to
> be designed on CAD and punched out on the CNC punch machine.
>
>
> Dean Psiropoulos
>
> RV-6A, Canopy frame headaches
>
>
> Time: 01:56:00 PM PST US
>
> From: <klwerner@comcast.net>
>
> <rv9-list@matronics.com>
>
> Subject: RV6-List: Interchangeable Cowlings?
>
>
> --> RV6-List message posted by: <klwerner@comcast.net>
>
>
> Greetings,
>
> Does anyone know if the cowlings for the -6, -7 & -9 airframes are
> interchangeable?
>
>
> In other words, are the firewall dimensions of the side-by-side airframes
> the same (or at least pretty darn close)?
>
>
> Thanks for any input,
>
> Konrad
>
> Do not archive
>
>
Message 2
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| Subject: | For Sale: RV7 wing and tail kits |
--> RV7-List message posted by: Jared Boone <jboone@earfeast.com>
Reality has set in, and I've decided that now is not the time for me to
build an airplane. So I'm selling my RV7 tail and wing kits. Here's your
chance to save a little money on both kits, with some of the work
already done, and avoid the factory lead-time on the wing kit.
I have done about 70% of the metal work on the tail kit, but have not
primed or assembled the pieces yet. A local "Fed" came by and looked at
my work and said it was outstanding. The wing kit is completely
untouched. I have inventoried the parts and sorted most of the hardware,
and that's it. I ordered the Duckworks landing lights (the square ones,
I think), electric trim, and the capacitive fuel sender.
The parts are located near Portland, OR and are available for
inspection. I would prefer to sell the kits to someone in the area, and
could even arrange delivery within 100 miles or so. I am asking $6,500
for both kits.
I also have old preview plans (circa 1998) for the -6 and the -8, if
anyone's interested in those.
Thanks!
- Jared Boone
jboone@earfeast.com
(503) 320-2066
Portland, OR
Message 3
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| Subject: | Too short rivets ? |
--> RV7-List message posted by: Kent Sorensen <kents@snak.com>
I'm now getting ready to get my work inspected (this is part of the
requirements up here in Canada). All that's left is some work on the
elevators and the HS rear spar, but I've hit an issue with the plans
calling for rivets that are too short.
The callout for the joining of HS-603 (the rear spars) and HS-609
(reinforcement bars) say to use AN470AD4-6 here but after setting the
first one it seems that the -6 is quite a bit too short to set
correctly. If set to fulfill the head width requirement it gets too
thin.
The combined thickness of the 603 spar and the 609 reinforcement bar is
0.23 inches so the formula would indeed call for a little less than a
-7.
I'm curious if I'm making a mistake, if I got a thicker stock of
reinforcement bar in my kit, or if this is simply a non-issue and the
-6 is acceptable after all ? This will have to be inspected and
approved so I'm afraid the last choice is not valid..
On the VS back spar the callout is also for -6 but there the combined
thickness is just 0.175 inches so the -6 is ok.
I have come across this problem two other places in the tail and it's
puzzling.
The other places I found the rivet length to be inadequate was the
5 rivets in HS center hinge bracket VA-146. The thickness is 0.185
inches which calls for a -6 but the plans said -5
6 rivets that join the rudder horn, the shim plate,R-904 lower rib,
R-902 spar and the reinforcement place. The plans said AD4-7 but that
was inadequate so I used -8.
Kent
Ontario, CA. Almost done with tail. QB fuselage and wings on order
Message 4
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| Subject: | Too short rivets ? |
--> RV7-List message posted by: "Dana Overall" <bo124rs@hotmail.com>
Kent, these issues have been addressed from the beginning of the 7. Van's
explaination of the rivet callout on the reinforcement bars is there are so
many rivets, a slightly smaller rivet is of no concern. As for the center
hinge bracket, this would actually take a .5 larger rivet. Van's position
on this is the use of a next size larger rivet would produce more bend over
rivet shafts, thus more drill outs, thus a substandard hole than a rivet
slight too short.
In some places, just use the rivet that gives you that "warm and fuzzy".
Don't worry too much, there are rivet callout tradeoff throughout the entire
overconstructed project.
Dana Overall
Richmond, KY
RV-7 slider, Imron black, "Black Magic"
Finish kit
Buying Instruments. Hangar flying my Dynon.
http://rvflying.tripod.com
do not archive
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Message 5
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| Subject: | 7A Landing Gear Mount |
--> RV7-List message posted by: "Karie Daniel" <karie4@comcast.net>
I'm installing the landing gear mount and the plans say to backdrill using the
pre-punched holes WD-721 Landing Gear Mount for the two holes that go through
F-770 and F-722 skins. This would be a pretty easy task for a slow build but on
the QB the cabin is mostly finished and the F-902 bulkhead blocks access where
I'm supposed to drill the forward most hole.
I could probably remove some of the bulkhead to do the job but I would rather not.
Any other 7A quick builders out there encounter this? What did you do?
Thanks,
Karie Daniel
Sammamish, WA
RV-7A QB (with legs....soon)
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