Hi Rowland,
Glad to hear you are on with it, smart thing would have been to call or ema
il me directly with your question ?
All pretty straight forward, no need to do any glassing / cutting of the co
wls, I designed and manufactured them so you don't have to ! If it takes yo
u more than a morning to fit them you are doing something wrong !
Air to the carbs is taken from under the cowl, no chance of water ingress v
ia a NACA scoop when parked.. Prefered filters are the conical K&N's direct
on the carbs, but the Europa airbox set up will work. The airbox / NACA se
t up was needed with the standard XS cowls as it gets hotter than hell in t
here with no through airflow. Air temps inside the upper cowl taken at shut
down after a 2 hour flight were below ambient, nothing above the baffles go
t hot enough to darken the 40 C bar on the temp' test strips.
The baffles will direct cold air all the way to the rear of the cowl, and w
ith the top of the tunnel gap blocked off with a baffle, little heat build
up there after shutdown. Baffles also prevent the exhaust headers cooking t
he fuel in the carbs.
I'm sure you had copies of the baffle templates [ baffles made from soft al
loy] if not I can send you a set. With this installation, you can run on th
e ground at 2,000 rpm all day, and do the 5 minute WOT run for the LaaLaaLa
nd pre 1st flight test without burning the cowls or chucking the coolant ov
erboard [BTW use 50/50 antifreeze / water, not the ''other stuff'' ]
As you only had the cowls [ not my complete kit] just follow the Europa FWF
Manual as far as mounting and plumbing the engine, in the same position as
the XS Europa kit.
Cheers,
Nev
-----Original Message-----
From: Rowland Carson <rowlandcarson@gmail.com>
Sent: Tue, Mar 15, 2016 8:22 pm
Subject: Europa-List: top cowl carb air inlet
I=99ve bought Neville Eyre=99s cowl set and I am wondering how
to get the air into the cowling to the plenum chamber for the carbs.
The Europa manual describes making a NACA duct on the top cowl to connect t
o the plenum chamber, at a marked position. If I understand the manual corr
ectly, it appears that a buck or splash moulding is supplied with the facto
ry cowl set. It is pushed through the cowl from the outside and the duct is
laid up inside the cowl against the splash moulding.
Neville has not supplied anything to make the NACA duct for the plenum cham
ber. Obviously I can work out the position on the cowl from careful measure
ment of the plenum relative to the firewall, but I don=99t have any i
nformation or pattern for the shape and size of the NACA duct.
Does anyone have one of these splash mouldings from the factory that I coul
d borrow, please? I don=99t need it right now, but want to make sure
I have some way of dealing with this problem when I come to it.
Or, if I=99m not understanding how the NACA duct is made, can someone
please explain it to me!
in friendship
Rowland
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