Message text written by INTERNET:jeremycrdavey@btinternet.com
>I'm way off that stage yet, but my current thinking is to lay the cable
and
put in an external power socket similar to Nigel Charles' (for trickle
charging, externally powered start, etc.). That way, if my CoG requires a
forward battery, it becomes the cable from the socket to the electrics. If
a
rear battery is required, it becomes the battery cable.<
When deciding on battery position be sure that the C of G is where you want
it to be. In my case the C of G was near perfect for a monowheel with the
battery just aft of the flap drive tube (Classic with Rotax 912S, Airmaster
prop and comprehensive panel). IMHO perfect for a monowheel is with the C
of G as far aft as possible whilst staying within the envelope for all
envisaged combinations of weight and balance. This helps to keep weight on
the tailwheel improving directional control and helps to achieve 4 point
landings. This recommendation came from Martin Stoner who did many test
flights some years back.
To help anticipate the likely battery position it is worth bearing in mind
that VP props and heavy panels tend to lead to aft mounted batteries. The
use of heavier engines such as Subaru (or in the future Wilksch) will
certainly need the battery placed as far aft as possible. If wiring is to
be included for external power (aft of the wing for safety) there is no
extra weight penalty for an aft mounted battery. In any case two pieces of
4 gauge cable only increase the weight by about 1.5lb.
Nigel Charles
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