toggle quoted messageShow quoted text
Always liked this design, you have put some careful thought into
aspects of your TriQ.
Would have thought it could be retrofitted to an existing set up,
as a secondary support say 4 inches inboard of the current
midspan. The doubler tube could be added fairly easily.
At least If the pin or the mounting or the bonded joint failed it
would continue to support.
On 12/01/2022 06:23, Jay Scheevel
I will put it in the files section, Sam.
You are right Mike. Retrofitting would probably be
impossible unless you build new elevators, but if
someone is working on an unbuilt kit, it would work.
Some have been known to build new elevators too.
I have an elevator design on my computer that would
eliminate the sparrow strainer that I may build some
day. Will go with the same design for the pivot if I
Kay, how about archiving it
on the Files section of the Q-List?
Jan 11, 2022, 6:53 PM Jay Scheevel <jay@...
As some of you
may remember, I redesigned the
mid-span pivot for the elevators
on my Q-2, essentially retaining
none of the original design,
excepting the BL position of the
pivot on the span of the elevator.
I was motivated to do this re
design based on a fatal accident
caused by the failure of a midspan
pivot pin on the original design.
NTSB determined that the pivot pin
failed as a result of corrosion
and metal fatigue.
I wrote up my
re design document at the time and
posted it on the Yahoo group and
labelled it as untested and
unproven. I now have almost 200
flight hours on this design and it
retains its original smooth
operation, shows no wear and has
demonstrated the design intent of
superior strength, low friction,
and zero corrosion. In addition, I
can visually inspect all critical
components of this pivot in a few
seconds during a preflight.
So I am pleased
to report that this re design is
now a tested modification. I am
reposting my design document for
anyone who is interested.
Tri-Q2 N8WQ 200 hours