Today's Message Index:
----------------------
1. 07:00 AM - Re: RV6-List: RV fuselages (Jim Oke)
2. 05:01 PM - Re: Interchangeable Cowlings? (robert watson)
3. 06:08 PM - Possible elevator defect (Paul Eastham)
4. 06:35 PM - Re: Possible elevator defect (Bob Kelly)
5. 10:00 PM - Fuselage tail bottom skin (The Strong's)
Message 1
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| Subject: | Re: RV6-List: RV fuselages |
--> RV9-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: | Re: Interchangeable Cowlings? |
--> RV9-List message posted by: robert watson <bob1629r@earthlink.net>
Yes when i built my 9 the cowl was marked as a 6 from vans
-----Original Message-----
From: Roger Evenson <revenson@comcast.net>
Subject: Re: RV9-List: Interchangeable Cowlings?
--> RV9-List message posted by: "Roger Evenson" <revenson@comcast.net>
yes for the 7 and 9; probably not for the 6.
----- Original Message -----
From: <klwerner@comcast.net>
<rv9-list@matronics.com>
Subject: RV9-List: Interchangeable Cowlings?
> --> RV9-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 3
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| Subject: | Possible elevator defect |
--> RV9-List message posted by: Paul Eastham <eastham@netapp.com>
Hi all,
I was installing my elevator trim the other day and found that I apparently
received incorrect platenuts in my emp kit. I seem to have gotten platenuts
for -8 screws instead of the supplied -6 screws. The -6 screws go into
the -08 platenuts just fine, but strip out if you tighten them hard...
it was not immidiately obvious to me that there was a problem until
I compared the size of the installed nuts with -06 nuts from my wing kit.
(There are not supposed to be any -08 platenuts in the emp kit, so I
don't see how else I would have accidentally installed the oversize
platenuts on my elevator)
I did alert Van's about this, and they said they would check their
stock. They did not offer a workaround, but I plan to just redimple
the access plate for -8...the 8 screws just barely fit through the
existing holes. Then hopefully the dimples on the elevator itself
will enlarge on their own when I install the screw.
Anyway, I'd recommend that you check your elevator and make sure you
can snug up those screws nice and tight. It would probably be bad if
that plate (and servo) dropped off in flight.
Paul (90804)
http://hmb.dyndns.org/~eastham/rv
Message 4
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| Subject: | Re: Possible elevator defect |
Paul,
--> RV9-List message posted by: Bob Kelly <mmpi@missionmedia.org>
I received BOTH sizes nutplates with my kit, #8's in the bags with the main
part of the kit and #6's in the box with the trim motor. I used the 6's
and am happy with the way everything went together. I am just beginning to
realize that the 8's are extra parts at this point. I haven't found a use
for them and am just about done with the emp. I don't recall if the
inventory called them out as 8's or 6's. I wouldn't have caught the
problem then as they are close in size.
Bob Kelly
90854
On 24-Jan-04, Paul Eastham wrote:
> --> RV9-List message posted by: Paul Eastham <eastham@netapp.com>
>
> Hi all,
> I was installing my elevator trim the other day and found that I
> apparently received incorrect platenuts in my emp kit. I seem to have
> gotten platenuts for -8 screws instead of the supplied -6 screws. The -6
> screws go into the -08 platenuts just fine, but strip out if you tighten
> them hard... it was not immidiately obvious to me that there was a problem
> until I compared the size of the installed nuts with -06 nuts from my wing
> kit.
>
> (There are not supposed to be any -08 platenuts in the emp kit, so I
> don't see how else I would have accidentally installed the oversize
> platenuts on my elevator)
>
> I did alert Van's about this, and they said they would check their
> stock. They did not offer a workaround, but I plan to just redimple
> the access plate for -8...the 8 screws just barely fit through the
> existing holes. Then hopefully the dimples on the elevator itself
> will enlarge on their own when I install the screw.
>
> Anyway, I'd recommend that you check your elevator and make sure you
> can snug up those screws nice and tight. It would probably be bad if
> that plate (and servo) dropped off in flight.
>
> Paul (90804)
> http://hmb.dyndns.org/~eastham/rv
>
>
>
>
>
>
>
Regards
Message 5
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| Subject: | Fuselage tail bottom skin |
--> RV9-List message posted by: "The Strong's" <tstrong@ida.net>
What is the order for the lower J stiffener, tail bottom skin and aft side
skin? I have the J stiffner next to the Bulkhead then the Tail bottom skin
and then the aft side skin. That seems the logical way but it leaves a
small step as the J stiffner goes forward from the tail bottom skin to the
aft side skin.
Thanks, Tom
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