Today's Message Index:
----------------------
1. 08:01 PM - Jacking Point (Matt Dralle)
2. 08:07 PM - Lubing The Tail Wheel Fork Bearing... (Matt Dralle)
3. 09:23 PM - Re: Jacking Point (Don)
Message 1
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Okay, so I'm sure this has been asked a few times already, and I should search
the archive, but what the heck, let's start a new thread.
I got my new tires today (Goodyear Custom Flight III, btw. Super sweet.) and started
looking for ways to get them on. I can really only see two ways to jack
the plane up easily with a normal jack.
1) I could put a short saw horse under the wing tie down and then put a hydraulic
jack on it and lift the side of the airplane up by this point. If I just gently
lift the plane by hand at this point, it seems like that's an awful lot
of weight to be lifting that far out on the wing. Can the spars really handle
this?
2) I could put a saw horse under the lower engine mount bolt to the firewall and
use a hydraulic jack to lift the plane up. This seems less scary, but I question
the shear strength of the bolt lifting all of the weight by this single
point.
What's the convential wisdom on jacking a tail dragger RV-8 to change the tires?
There has to be a way with out building some elaborate dolphin contraption.
BTW, with regards to my tire wear, since there's a fair amount of camber(?) afforded
by the Grove gear, I've got nearly all the wear on the outside 50% of the
tread. I could probably rotate them 180 degrees and get another 70 hours of
flight time, which wouldn't be bad for 22-year old stock kit tires from Van's
(remember, I swiped them from the RV-4 project after the brake incident). But,
I probably should have rotated them a bit sooner. While there's not cord showing,
the tread is gone. Live and learn; I'll be rotating these GYCFIII's in
a more timely manner. If I can double my wear life by rotating because of the
camber, I might get 1000 hours out of these babies! ;-)
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Blog
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: Enjoying The Fruits of 2500 Hours of Labor!
Message 2
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| Subject: | Lubing The Tail Wheel Fork Bearing... |
How the heck do you lube the bronze bearing on the tailwheel fork short of taking
the giant nut off. I lubed it up good during initial assembly, then at about
40 hours, it started to kind of stick, so I dissembled and lubed it again.
Now at 70 its doing it again. I foolishly put a Zerk fitting in the body of
the thing, thinking that next time I could just shoot some lube in there. Great
idea except that it doesn't work for such a tight fit.
Is there some "super lube" you can get that will last forever? I've used both
graphite wheel bearing grease and Aeroshell #6 grease.
Thanks!
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Blog
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: Enjoying The Fruits of 2500 Hours of Labor!
Message 3
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Matt,
I use aircraft wing jacks and lift the plane at the tie downs. No problems
so far. BTW this is a 7 but I know others with 8's that also use ac wing
jacks
-----Original Message-----
From: owner-rv7-list-server@matronics.com
[mailto:owner-rv7-list-server@matronics.com] On Behalf Of Matt Dralle
Sent: Wednesday, June 30, 2010 8:00 PM
Subject: RV7-List: Jacking Point
Okay, so I'm sure this has been asked a few times already, and I should
search the archive, but what the heck, let's start a new thread.
I got my new tires today (Goodyear Custom Flight III, btw. Super sweet.)
and started looking for ways to get them on. I can really only see two ways
to jack the plane up easily with a normal jack.
1) I could put a short saw horse under the wing tie down and then put a
hydraulic jack on it and lift the side of the airplane up by this point. If
I just gently lift the plane by hand at this point, it seems like that's an
awful lot of weight to be lifting that far out on the wing. Can the spars
really handle this?
2) I could put a saw horse under the lower engine mount bolt to the firewall
and use a hydraulic jack to lift the plane up. This seems less scary, but I
question the shear strength of the bolt lifting all of the weight by this
single point.
What's the convential wisdom on jacking a tail dragger RV-8 to change the
tires? There has to be a way with out building some elaborate dolphin
contraption.
BTW, with regards to my tire wear, since there's a fair amount of camber(?)
afforded by the Grove gear, I've got nearly all the wear on the outside 50%
of the tread. I could probably rotate them 180 degrees and get another 70
hours of flight time, which wouldn't be bad for 22-year old stock kit tires
from Van's (remember, I swiped them from the RV-4 project after the brake
incident). But, I probably should have rotated them a bit sooner. While
there's not cord showing, the tread is gone. Live and learn; I'll be
rotating these GYCFIII's in a more timely manner. If I can double my wear
life by rotating because of the camber, I might get 1000 hours out of these
babies! ;-)
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Blog
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: Enjoying The Fruits of 2500 Hours of Labor!
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