A Wing Question
Adam Glatt
adam.g at sasktel.net
Wed Jul 7 12:25:08 AKDT 2004
Mike Hester wrote:
> Bob, it's not much at all.
>
> 2 years ago, some of us pattern nuts in D3 witnessed the most
> incredible thing in Nashville at a contest. Levi Simms, an
> intermediate pilot, took off with his Prophecy and began practicing
> for the day's rounds. He made it through about half of the sequence,
> then pushed over the top to set up for his outside loop. At this time,
> one of the wings disengaged from the adjusters and turned 90 degrees
> into the air stream.
>
> After everybody gasped and the usual "oh #&@*" remarks, the plane went
> into a spin....a soft helicopter like motion. The descent was very
> slow, and he found that by adding power, he could SLOW the descent
> even more. To make a long story short, the plane went in, and didn't
> even break the prop....from about 100 feet or better.
>
> He had forgotten to install the screw into the wing tube, and made
> half the flight with the wings just stuck on. He put it back together
> and flew the whole contest without incident. Now for obvious reasons,
> he's known as "Lucky Levi".
>
> So the point is, there's not a lot of outward force on the wings at
> all. So for anyone worried about making that attach screw survive a
> nuclear blast, don't worry...it's not NEARLY as critical as it would
> seem. Just remember to screw it in before you fly =)
>
> -Mike
>
>
> ----- Original Message -----
> *From:* Bob Pastorello <mailto:rcaerobob at cox.net>
> *To:* NSRCA <mailto:discussion at nsrca.org>
> *Sent:* Tuesday, July 06, 2004 6:55 PM
> *Subject:* A Wing Question
>
> Anyone out there actually calculated (or measured) how much
> OUTWARD force is exerted on our wings during our typical stuff?
> I'm looking for the force in line with the wing tube, spanwise,
> for the "retaining" load to keep the wings ATTACHED.....
>
> Any knowledge?
>
> Bob Pastorello
> rcaerobob at cox.net <mailto:rcaerobob at cox.net>
> www.rcaerobats.net <http://www.rcaerobats.net>
>
>
>
I flew two flights before, upon carrying the plane back to the pits, I
noticed the wing was about 1/4" away from the fuselage. Then I put the
rubber bands on. It's a good thing the CF wing tubes are so tight.
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