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Tim(at)MyRV10.com
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 Posted: Fri Nov 17, 2006 4:10 am Post subject: [SUSPECTED SPAM] Re: Okay - Okay tell me I'm just sarcast |
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For a guy who doesn't own a plane and isn't building a kit,
you're very in touch. Good job Matt. I've read some pretty
good stuff showing that Va actually goes up with more weight.
Strange, but true.
Tim Olson - RV-10 N104CD - Flying
do not archive
mgeans(at)provide.net wrote:
| Quote: |
John Cox,
Your Comment:
The reason for asking is the additional weight on the VAN
designed spar (with extension) cannot perform to the same
standards in maneuvering speed turbulence as the prototype
N410RV used for kit certification.
Just finding out that you are an A & P you ought to be
familiar with this concept so here goes.
I remember once reading an article about A/C that have tip
tanks and how the weight on the ends of the spars would
actually dispurses the load at the wing roots.
IE: 10' 2 x 4 on 2 sawhorses placed 6" from each end. hang
8 25Lb sand bags from looped rope within the center 2' of
the 9' span between the saw horses and note the load and
stress on the 2x4. NOW take 2 of the sandbags and hang
them on the ends of the 2 x 4 and note the change in the
load. The 2x4 is still holding the 200lbs but can do it
easier with 50lbs spread out to the ends of the "wings"
This was the article's point about tip tanks which seems
like the subject of the thread. I could see how 2 souls
and extra gas in the tips could gross out the weight of the
-10 but it seems logical that the spar roots would see less
stress dynamically during flight than normal wings with a
full gross load in the cabin. I could see how static
stress on the ramp could be affected but is that really
pushing the design limits past the -G's the A/C is rated
for?
Not meaning to question your more expertise on this, but am
I on to something or missing something about maneuvering
speed turbulence?
Matt Geans
Builder Wanna-be
Do not archive (I have GOT to remember to put that in more
often)
On Thu, 16 Nov 2006 10:44:36 -0800
"John W. Cox" <johnwcox(at)pacificnw.com> wrote:
> John, for the purpose of expanded clarification, do you
> espouse that
> those aircraft which have added additional fuel tanks
> have moved to the
> dark side as well? The reason for asking is the
> additional weight on
> the VAN designed spar (with extension) cannot perform to
> the same
> standards in maneuvering speed turbulence as the
> prototype N410RV used
> for kit certification.
>
>
>
> That was the reason for the phrase I used last week
> "Design for
> Aerobatic, Load to Utility and fly Standard Category...
> 3.8 G". I
> perceive many builders have dismissed it our did not
> understand the
> consequence. It was commonplace for the Lancair plastics
> to just up
> their Gross Weight on paper for certification to cover
> the additional
> mods without regard to the spar and the landing gear
> capability.
> Kabang.
>
>
>
> For those willing to move to the dark side, the process
> is as easy as
> finding a DER (Designated Engineering Rep) willing to go
> with you and
> then provide the plane for the same testing that the FAA
> required of
> VAN. Remember to pack a current chute.
>
>
>
> J Cox
>
>
>
>
>
> ________________________________
>
> From: owner-rv10-list-server(at)matronics.com
> [mailto:owner-rv10-list-server(at)matronics.com] On Behalf
> Of JOHN STARN
> Sent: Tuesday, November 14, 2006 9:59 PM
> To: rv10-list(at)matronics.com
> Subject: Re: [SUSPECTED SPAM] Re: Okay - Okay
> tell me I'm
> just sarcastic on the RV-12
>
>
>
> NOPE, I'm not, but my minor was in aeronautical
> engineering...BUT if I
> were building a -10 and wanted to change something,
> anything I'd spend a
> little bit and seek the advise of one. I'd do the same
> thing if I wanted
> to go from light shingles to a heavy tile roof on my
> home. BUT there
> seems to be a lot of -10 guys who are looking the same
> answer, sooo pool
> your funds and buy the advise. Do Not Archive. KABONG
> BE HAPPY..
>
>
>
> On the other hand maybe, just maybe, Van has considered
> all the other
> ways but he also didn't want to be "dickin' with
> anything that may
> affect the airworthiness of the plane" either.
>
>
>
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k5wiv(at)amsat.org
Guest
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| Posted: Fri Nov 17, 2006 4:44 am Post subject: [SUSPECTED SPAM] Re: Okay - Okay tell me I'm just sarcast |
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Not so strange when you remember that an increase in weight results in an
increase in inertia. So -- the same applied force results in less
acceleration.
Jack & Cecilia Sargeant
1127 Patricia St.
Wichita, KS 67208-2642
316/683-5268
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jjessen
Joined: 22 Apr 2006
Posts: 285
Location: OR
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| Posted: Fri Nov 17, 2006 5:28 am Post subject: [SUSPECTED SPAM] Re: Okay - Okay tell me I'm just sarcast |
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Less acceleration, meaning less deflection for those parts being stressed, I
presume.
John Jessen
#40328 (buildus interruptus)
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