Today's Message Index:
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1. 05:50 AM - Re: Thank You Matt (nightmare)
2. 09:25 PM - Re: Vi Kapler hinges (taildrags)
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| Subject: | Re: Thank You Matt |
this temp shut down is a great reinforcement as to why we make our donations. would
hate to see this forum shutdown because Matt couldn't make a buck. Thanks
Matt
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Paul Donahue
Started 8-3-12
do not archive
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422150#422150
Message 2
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| Subject: | Re: Vi Kapler hinges |
Howdy, low 'n' slow fliers;
First, I'd like to wish you all a happy and blessed Easter. Part of mine was spent
at the hangar, on a beautiful Sunday afternoon, but it was punctuated by
some less-than-pleasant moments as I attempted to replace the front main seal
on my engine and I'll pass over that in the spirit of the season. Suffice it
to say that the seal and spring have now been removed, cleaned up again, and are
back in place on the crankshaft nose waiting for my patience to return before
I attempt to press them back into place. Maddening.
Rebuild work on the Stromberg carb went much better, and after getting a rebuild
gasket set from Aircraft Spruce and cleaning everything up, I just need to
set the float level and the carb will be ready to reassemble and put back on the
engine so I can resume testing and compression checks.
An update on the hinges. I now have the jigs and tooling from Vi and am trying
to get an updated cost and delivery date for more of the rough castings for the
hinges. It is my intent to produce a final, higher-quality run of the cast
aluminum hinges as a legacy to Vi and Mr. Pietenpol. The inventory will be of
a limited quantity (probably in stock till I can't find my way out of a darkened
room without assistance), but the hinges will be produced from the same castings
and using the same jigging as Vi has always used. The difference will
be that we will smooth the parts a bit more and have them reflect the longevity
that the Air Camper design has itself developed over the years. A bit more
refined finish, I guess you could say... in the final production run of these
parts. I'm going to try, anyway.
In parallel with this, and to bring things into the 21st century, it is my intent
to engineer and produce modern parts using the same geometry and design but
in a tougher, stronger, more dimensionally stable, lighter, and more durable
material. In doing so, I hope to offer the new parts at about the same cost and
with the same reliability as before. Vi tells me that the original hinges
load-tested at 700 lbs. static, and he sent me a failed pair of hinges that were
used for that testing. He has set the bar for my engineering, and I am confident
that I can meet or exceed this parameter while still achieving the other
goals of better dimensional stability and reduced weight. In any case, picture
2100 lbs of static (or dynamic) force on any of the three tail surfaces of
an Air Camper, such that a single pair of hinges would have to sustain 700 lbs
of load. It says a lot for the durability of these airplanes, and it especially
says a lot about why no one has ever seen the tail surfaces of an Air Camper
fly off. If anyone has evidence to the contrary, I'd be very interested to
hear it.
--------
Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422181#422181
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