G Loads and lighting conduits.
I had a quick look through the Airworthiness Approval Note: PFA-220-259 dated 4
June 1993. I don't think I have seen the G Loads or design loads anywhere else
but all I can find is that proof load tests were carried out to supplement the
analysis as follows:
a). Wing symmetric loading equivalent to +4.4 g at 1,300 lb were applied
uniformly about the 1/4 chord position carried out on G-YURO (prototype) wings
with no visible or audible damage or permanent deformation.
b) Tailplane tested in symmetrical download to design limit (700 lb) without
damage or permanent distortion.
c) Engine mountings tested by applying a load of six times the engine weight in
vertical loading without damage or permanent distortion.
d) Flaps tested to 275 lb each side, design limit loading, without damage or
permanent distortion.
I guess the structure must have been designed around the requirements laid out
by JAR VLA to which the aircraft was certified.
Wing light wiring.
I asked the question of the factory a few months ago and received a very neat -
genuine Ivan Shaw sketch of a suggested position. He thought it best to lead the
wiring through the root core about 4 inches forward of the spar. I used a small
piece of tubing at the root to ensure protect against chafing - wire running
down the lightning holes to the tips. There would appear to be enough room
within the root closeout to position the connection plug. The root cores are now
supplied solid (early ones had lightening holes) so use a .75 inch hole saw
taped to a .75 inch plastic conduit or water pipe to drill the hole.
You might want to call Europa Inc. in Lakeland as they sent me some sketches
another builder had supplied them showing a Whelan Light system installation
description. Ask them to send you a copy too.
Here's a poser though! Are you allowed to fly aircraft with tinted screens at
night? I think we might need an answer (or is it just one of those scare stories
that gets banded around) as the Europa ships with tinted screens as standard.
(They do not have the problem - if there is one - in the U.K because they cannot
fly homebuilts at night).
Regards
Martin Tuck
#152
Wichita, Kansas
U.S.A.
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