Exactly!
Tim Olson - RV-10 N104CD
do not archive
Miller John wrote:
>
> FWIW, a forward CG is safer than an AFT CG.....
>
> Grumpy
> N184JM
>
> On Nov 6, 2009, at 9:36 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*
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>>> * *
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>>>
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>>> * *
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>>> **
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>>> *www.aeroelectric.com*
>>> *www.buildersbooks.com <http://www.buildersbooks.com>*
>>> *www.homebuilthelp.com*
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