Agreed. I do think the "stock" RV-10 is a bit nose heavy. I ended up
with a CG a bit further aft than optimum because I put in the
Flightline AC air conditioning system and installed an MT propeller.
I think that having the extra weight of the Hartzell up front would
probably help a bit. As it is, I can put four normal size adults in
the airplane but will have to restrict my luggage to around 35 lbs.
About 98% or our flying is just Mary and I, so doesn't really slow us
down, but I am pretty careful about it.
David Maib
40559
Flying
On Nov 6, 2009, at 10:36 AM, Tim Olson wrote:
Kinda helps blow away that myth that the CG in the -10 is too far
forward and it's "nose heavy", doesn't it. :)
My opinion personally is that the RV-10's nose-heavyness should
not be something people should intentionally try to change,
because in the end they're likely going to find that they
WISHED they had the CG more forward. It used to be that
some people thought they wanted everything up front to be
lighter (i.e. props, and all the accessories) to help "fix"
the nose-heaviness. I think that in reality, the more you
take off the nose, the more CG worry you're going to
end up with, so best to just build the plane not considering
the plane to have any "nose heaviness" to "fix".
If you build it in a normal way, you will naturally be less
nose heavy than the Van's prototypes...because you'll already
have more interior features.
Tim Olson - RV-10 N104CD
Rene Felker wrote:
> Sorry guys, I did not weight the belts. Butmy CG is pretty far
> aft and if I was building another RV-10 I would reconsider a couple
> of things in order to move the CG forward. But I WOULD NOT give up
> the belts. Examples:
> ELT
> O2 System (Currently behind the bulkhead)
> Battery(1 925 in tray)
> Rene' Felker
> RV-10 N423CF Flying
> 801-721-6080
> *From:* owner-rv10-list-server@matronics.com [mailto:owner-rv10-
> list-server@matronics.com] *On Behalf Of *David McNeill
> *Sent:* Thursday, November 05, 2009 9:30 PM
> *To:* rv10-list@matronics.com
> *Subject:* RE: AMSAFE seat belts
> Below is my reply to Jeff. I do believe that if you use the
> standard hardpoints and regular belts that you should at least use
> a CS stainless washer under the screw. This will spread the load on
> the glass and make a pull though more difficult.
> don't know for sure but the total weight of four AMSAFE belts
> IIRC is less than 10 pounds. Incrementally I would say an
> additional 2-4 pounds over the standard belts. You add 4
> 3'x3'x1/2'' aluminum blocks and four rollers Check with Rene as he
> probably weighed the alternatives.
> The existing hardpoints were deemed inadequate (for the AMSAFE
> application) by both AMSAFE and consultant (PhD, ME Caltech) who
> lives nearby. The vans hardpoints are setup for a single #5 counter
> sunk screw. This is installed without CS washer that would be
> required to spread the load. My ME consultant friend tells me that
> the normal use of the regular belts will cause micro fractures and
> may fail (pull through) if and when a crash occurs. AMSAFE
> commented that they would sell me the belts if I "beefed up" the
> existing hardpoints. Since the roller have screws for attaching the
> brackets I needed a means to attach the bracket Since I did not
> want 16 protruding though the lid I used the aluminum blocks
> (2024T3 or 7075) . These were tapped for 4 external screws to hold
> the pad that holds the roller. Each external screw has a .75" CS
> stainless washer and thereby spreading the load on the lid. In
> addition since the shoulder straps are on inertial reels there is
> no constant shear load on the single screw in the lid. The
> hardpoints areas were strengthened by additional E-glass and S-
> glass tapes. The calculations of the ME ,while informal, indicated
> that relative strengths could compared by comparing the surface
> areas of the fasteners. Hope this helps. I've got a couple of
> questions David:
> How much weight are we adding with the inertia reel belts as
> opposed to the standard?
> The hard points you show in you installation pictures are much
> more elaborate than what Vans provides for the stock belts. Is
> there a reason the inertia belts require more support, or do you
> feel the Vans hard points aren't enough for either approach
>
> ----------------------------------------------------------------------
> --
> *From:* owner-rv10-list-server@matronics.com [mailto:owner-rv10-
> list-server@matronics.com] *On Behalf Of *RV Builder (Michael Sausen)
> *Sent:* Thursday, November 05, 2009 7:01 PM
> *To:* rv10-list@matronics.com
> *Subject:* RE: AMSAFE seat belts
> I think the overall concern is that the factory hardpoints are
> just not enough. I believe, as David said, AMSafe was concerned
> that additional reinforcement would up the safety margin. I know I
> feel a lot better after putting a couple of intersecting layers of
> S glass over the hardpoints.
> Michael
> *From:* owner-rv10-list-server@matronics.com [mailto:owner-rv10-
> list-server@matronics.com] *On Behalf Of *Jeff Carpenter
> *Sent:* Thursday, November 05, 2009 4:20 PM
> *To:* rv10-list@matronics.com
> *Subject:* Re: AMSAFE seat belts
> I've got a couple of questions David:
> How much weight are we adding with the inertia reel belts as
> opposed to the standard?
> The hard points you show in you installation pictures are much
> more elaborate than what Vans provides for the stock belts. Is
> there a reason the inertia belts require more support, or do you
> feel the Vans hard points aren't enough for either approach?
> Jeff Carpenter
> 40304
> Finishing the inside of the cabin top... and making provisions for
> the belts
> On Nov 3, 2009, at 9:46 AM, David McNeill wrote:
> www.inertialbelts.com <http://www.inertialbelts.com> is on line
> again. The belts are shown in my Glastar as the belts were not
> installed in my 10 at that time. Rene has good pictures of the
> final finish. I will enclose one of his here.
> <P0002841.gif>
> * *
> * *
> *www.aeroelectric.com*
> *www.buildersbooks.com*
> *www.homebuilthelp.com*
> *http://www.matronics.com/contribution*
> *http://www.matronics.com/Navigator?RV10-List*
> *http://forums.matronics.com*
> * *
> * *
> * *
> *href="http://www.aeroelectric.com">www.aeroelectric.com*
> *href="http://www.buildersbooks.com">www.buildersbooks.com*
> *href="http://www.homebuilthelp.com">www.homebuilthelp.com*
> *href="http://www.matronics.com/contribution">http://
> www.matronics.com/chref="http://www.matronics.com/Navigator?RV10-
> List">http://www.matronics.com/Navigator?RV10-List*
> *href="http://forums.matronics.com">http://forums.matronics.com*
> * *
> * *
> * *
> **
> **
> **
> **
> **
> **
> **
> *www.aeroelectric.com*
> *www.buildersbooks.com <http://www.buildersbooks.com>*
> *www.homebuilthelp.com*
> **
> *http://www.matronics.com/contribution*
> **
> **
> **
> **
> **
> **
> **
> **
> *http://www.matronics.com/Navigator?RV10-List*
> **
> **
> **
> *http://forums.matronics.com*
> **
> * *
> *
> *
