In a message dated 09/02/99 15:40:32, JohnJMoran@aol.com writes:
<< 1) I am considering small NACA extractor vents - perhaps 2 inches wide -
under
the seats. These would vent the cockpit somewhat - airflow would be impeded
by
having to travel around the blue foam and cushions - and also provide a drain
in case of a fuel leak from a filter as re-located under the seat. Is this
location reasonable or would it affect structural strength unduly?
>>
One has to be careful about objections based on simple aerofoil theory of low
pressure beneath. Maybe it is, but what will drive the air is pressure
difference. The cabin is probably already at a lower pressure due to its
many other outlets. It would in any case need only the smallest of lips out
into the airstream to persuade a 100mph blast to enter.
However I would point to my experience of having a hot pilot control column.
The only explanation I have for this is exhaust gases on the lower fuselage.
A very good reason not to sample it ?
On 3) <<The box which holds the throttle lever does not have a drain>>.
Probably not required IMHO, but for fuel spill, put them everywhere you can
think of. Certainly under the seats and in the baggage compartment (they may
communicate through imperfect sealing of the cockpit module). I have not been
able to get wifey back in the plane since messing around with fuel lines.
Dirt in the wheel well can be horrendous if you operate out of grass fields.
If only the wheel went right up, then a door would be practicable. Mudguards
have been described and fitted by various builders but I am not sure which are
approved. It is very important to seal the tunnel closure behind the wheel,
but to be effective a gaiter is needed around the u/c push rod.
Graham C G-EMIN
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