Extra 200 - Page 182

CHAPTER 28
PAGE 7
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RA - FLUGZEUGBAU GmbH
SERVICE MANUAL EXTRA 200
PAGE DATE: 1. July 1996
28-10-00 STORAGE
The EXTRA 200 is equipped with two independent fuel
systems: The center- and acro tank system and the wing
tank system.
The acro tank (1, Figure 2) incorporating an inverted flight
fuel supply system is connected to the center tank (2) which
is mounted in front of the main spar. Fueling the center and
acro tank is by means of the fuselage 2" diameter filler cap
(5). For leak detection the center and acro tank are furnished
with a GRP tank shell. In case of leakage blue colored fuel
is shining through. The center/acro tank is grounded. The
center and acro tank deaerate by ventilation tubes (a-b)
ending at the right side of the main landing gear spring.
The root section of each wing  in front of the main spars 
forms an integral fuel tank of approximately 100 cm (39")
length (4). Each wing tank has a 2" diameter filler cap (5)
for gravity fueling. Sealing lips are installed at the filler
necks inside the wingtank. For sealing 3M Brand Fuel
Resistant Coating 776 (3M, St. Paul, USA) has been ap-
plied to the inside of the wing tanks. For lightning protec-
tion reason the shell in the area of the wing tank has an outer
layer of carbon fiber with incorporated aluminium thread
(3). The wing tanks are grounded. Each tank is provided
with an alu ventilation tube (c) for adequate venting. The
ventilation tubes are interconnected to a main tube (d),
ending outside of the fuselage at the right side of the main
landing gear spring.