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What's inside the vertical stab below elevator level

 
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jbhart(at)onlyinternet.ne
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PostPosted: Sun Jan 29, 2012 6:44 pm    Post subject: What's inside the vertical stab below elevator level Reply with quote

Dave,

I copied part of page 4 of the FireFly assembly book, and I have sent it as
an attachment.

To help explain the assembly, I marked all of the steel welded components
that make up the boom tube attachment ring and vertical stabilizer post with
a red dot. All components not marked are assembled aluminum parts.

Jack B. Hart FF004
Winchester, IN

At 04:10 PM 1/29/12 -0500, you wrote:
Quote:


Hi again, Kolbers,

I have a tear in the fabric circumferentially around the tube that runs
diagonally from the boom tube to the tail wheel and a wrinkle up both
sides to the upper tube. I don't know what goes on inside the
triangular piece of vertical stab beneath the level of the elevator, so
I don't know if the problem is just fabric or something with the tube
inside. Does anyone have a photo of the tubing of that section of a FF
uncovered so that I can see what it's like inside? Or perhaps a scan of
p. 5 of the builder's blueprint? I don't want to cut the fabric if it's
only a fabric malfunction, but I don't want to land with a broken tail
wheel assy, either.

Thanks for any enlightenment. Something most of us can use from time to
time...

Dave Kulp
Bethlehem, PA
FireFly 11DMK

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Joined: 21 Oct 2008
Posts: 212
Location: Bethelhem, PA

PostPosted: Mon Jan 30, 2012 9:01 am    Post subject: What's inside the vertical stab below elevator level Reply with quote

Phil, Gary Jack,

Thanks for the info on the tail wheel assembly and the info on the pulse
pump. The pump will be replaced before I'm aloft again.

Re: the tail wheel assembly, the photos and blueprints are a world of
information. Now I can probe thru the fabric and know what should be
where doing what, making it pretty simple to figure what is happening.
Also, Gary's description of tight turns torquing the assembly gave me
some insight. Second last day I went up was right after quite a bit of
rain. I thought the only unwanted result was a lot of muddy slop thrown
on the bottom of my wings and tail section, but knowing the effect of
tight turns gave me a gestalt moment. My FF is hangared in a converted
construction trailer. When I was backing it down the ramps, with me in
front of the FF pushing and then holding back with nylon straps, when
the tail wheel rolled off its track to the taxiway the FF stopped
suddenly. I went back to check and found that the crushed stone was
soupy and the tail wheel turned 90 degrees sideways when it hit the
mush. I had to get my tail wheel dolly to move it backwards off the
trailer.

With my newly acquired knowledge I can return to the strip and learn
exactly what happened inside the fabric; I may be back to get the tail
wheel fix mentioned. Thanks again for the responses. I also learned
why they don't put reverse gear in taildraggers...

Dave Kulp
Bethlehem, PA
FireFly 11DMK

On 1/29/2012 9:45 PM, Jack B. Hart wrote:
Quote:
Dave,

I copied part of page 4 of the FireFly assembly book, and I have sent it as
an attachment.

To help explain the assembly, I marked all of the steel welded components
that make up the boom tube attachment ring and vertical stabilizer post with
a red dot. All components not marked are assembled aluminum parts.



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