Rowland,
Not to worry as the guys pointed out. I am embarrassed for the company
that the tubes are that far off.
They should be rather parallel. Please shim it out if necessary but I
can have a new frame sent. My spare one here in the shop is pretty
straight.
If you wish to continue, make sure the frame is square to the firewall.
Also note that it is not askew to the vertical and horizontal axis as
best you can. Make shims to keep the vertical and horizontal tubes 1/8
inch off the firewall (1/16 inch min.). The manual says to leave at
least 3/16 inch from the top horizontal tube to the firewall for the
bungee. It has been my experience that 1/4 inch minimum is necessary as
glass is added and the bungee for the mono or trigear (when springs are
not used) gets really tight in there. For the mono, get the swing arm
out and temporarily fit it to check the alignment with the well, but if
the lower tube is square to the firewall, you will be all right
especially with the 7 inch tire.
If the tubes that go into the module are a bit far from the module at
points, the Redux (Araldite 420A/B) will take up the slack on final
install.
Once you are dry fitted, and have done your best to drill your mounting
holes, then take out the frame and assemble your gear on the bench.
Make sure your over center is at least 1/16 inch on the LG08s when
installed. This is quite easy to do now with the gear on the bench and
assembled. Make sure all is well with the mono wheel geometry before
final install as it is hell getting up into that well to grind and trim
if the arms are not straight.
Regards,
Bud Yerly
Europa Tech Support.
----- Original Message -----
From: Rowland Carson<mailto:rowlandcarson@gmail.com>
To: Europa e-mail list list<mailto:europa-list@matronics.com>
Sent: Wednesday, April 18, 2012 2:46 PM
Subject: Europa-List: landing gear frame geometry
<rowlandcarson@gmail.com<mailto:rowlandcarson@gmail.com>>
I've made a big hole in the firewall and am trying to get my landing
gear frame (LG01/3) aligned with the firewall according to the manual
page 21M-2. That calls for 3 tubes (top horizontal and 2 vertical side
ones) to be between 1mm & 3mm from the vertical face of the firewall.
After some fettling of the holes and tunnel radii the frame goes in
without too much effort, but when I sight down the firewall for a rough
check of how far away the relevant tubes are I find they do not appear
co-planar. The top tube is too far away at the starboard side, but the
starboard vertical tube is almost touching the firewall. The top tube is
about the right distance from the firewall at the port side, but the
port vertical tube could stand coming a little closer. Oh, and the
bottom horizontal tube is pretty much parallel to the firewall. The
fuselage bottom moulding is sitting on a dolly that provides support for
the curve of the underside and I have not observed any measurable twist
in it.
I took the LG frame out and checked the parallelism of the tubes in
question by laying a steel flat diagonally across (the piece I had
wasn't long enough to stretch from side to side or top to bottom); it
rocks audibly on 3 out of 4 of the combinations. My digital level also
shows that the top and bottom tubes are about a degree different from
each other and the side vertical tubes are about half a degree different
---From each other.
Is this significant? Should I ask for a replacement LG frame?
My next step, if no other advice forthcoming, would be to try setting
the alignment with the swinging arm LG02 fitted temporarily, and accept
whatever misalignment the tubes have with the firewall.
in friendship
Rowland
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