Today's Message Index:
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1. 10:29 AM - ROD END BEARING JAM NUT - Torque (Garey Wittich)
2. 10:47 AM - Heads Up On Wheel Pant Fiberglass Quality... (Matt Dralle)
Message 1
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| Subject: | ROD END BEARING JAM NUT - Torque |
For you Experts:
Installed the Rod End Bearings in the Rudder and Elevator today. -My loca
l A & P said to tighten the Jam Nut by "Hand Tightening" the Jam Nut as far
as it will go, then turn the nut between 1/4 and 1/2 turn more.
I "hand tightened" the Jam Nut (as the A & P said), but could not get it to
tighten more than an additional 1/8 turn, -Because the Jam Nut is recess
ed (in the Spar channel), it is impossible to get a wrench "squarely" on it
= any further tightening of the Nut starts to round the corners of the N
ut. -Is this 1/8 turn adequate for the Jam Nut tightness, if NOT how do y
ou turn the Nut (since it is recessed) ????
What Torque Value is required for the Jam Nut, assuming a Torque Wrench can
get into the recessed area - do not see how this can be done.
ANOTHER QUESTION -Have a "Click Type" torque wrench that starts at 20 in-lb
s. -From previous posts, the FIRST 1/6 and the LAST 1/6 of the Wrench's s
cale are inaccurate. -So how do you measure -"LOW VALUES" -for an AN3
Nut that requires 20 - 25 in/lbs plus Friction Torque of approx 5 in/lbs
= 25 to 30 on/lbs TOTAL torque ??
Appreciate your help,
Garey - Santa Monica, CA=0A=0A=0A
Message 2
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| Subject: | Heads Up On Wheel Pant Fiberglass Quality... |
Dear Listers,
I took delivery of an RV-8 QB finish kit around September 2008. Last weekend I
started tackling the installation of the wheel pants. The first thing I noticed
on inspection of the wheel pants was how horrible the quality was. The front
piece didn't fit the back piece and the flange shoulder on the back pieces
were not straight. Getting a even an "okay" fit was nearly impossible. The
other issue was the quality of the fiberglass itself. On the rear part of the
back piece, the epoxy resin was completely spider-cracked on both sides and
on both pants. It was nothing a few more coats of resin and a bunch of sanding
couldn't fix, but who wants to do that? Needless to say, I was fairly demoralized
by the fact that there was really no way I was going to be able to make
them really fit together "perfect".
But, I plowed ahead anyway and started trying to mount them to the Grove Airfoiled
gear. I had a lot of trouble getting them to fit correctly onto the landing
gear. The main issue seemed to be that they are too small at the bottom and
don't fit over the brake caliper without touching. I kept thinking that I must
just not have them in the correct position, so I kept hogging out a little
more glass here and there with the Dremel tool until basically the holes were
all too big (for the gear leg and for the wheel). I finally found a couple of
builder web sites where others have had the same issue with the brake caliper
interference and they added a 2.5" "blister" to pooch out over the area that
rubs. But by this time it was too late for that first set of pants.
But here's the interesting part. Since I had basically destroyed both of the original
pants trying to get them to fit, I decided to just order up a replacement
set, take a sedative, and start over again on the whole thing. The new wheel
pants arrived from Van's yesterday. The difference in quality between these
replacement units and the ones from last year is incredible! The seams are
nearly perfect on the replacements and only required a bit of sanding on the
front part to get a *perfect*, and I mean *perfect* fit between the front and
back halves. The consistency of the fiberglass layups is 100% better on the new
units, and that seam at the top was already so flat, I didn't even have to
sand it down. There are no spider cracks in the glass anywhere. I haven't actually
weighed them, but replacements feel like they might be somewhat lighter
as well.
Obviously Van's switched fiberglass vendors at some point in the last 10 months
and the switch was well worth it. I've attached a couple of photos of the Circa
September 2008 and Circa June 2009 sets I received. The only similarity is
in the overall shape.
FYI
Matt Dralle
RV-8 #82880 N998RV
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