tony I dont know if you have read your off list email, but i sent you
something last night which you migt find helpfull, I will add to it here on
list
how about a couple of 100 amp blade switches, one on the positive, one
negative
with a lock wire on each, and the deadman pull cord to pull the switches in
an emergency.
power consumption is zero, unlike a relay based solution, and is fairly well
foolproof
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com]On Behalf Of Tony Renshaw
Sent: Saturday, June 19, 2010 1:27 AM
Subject: Europa-List: Rope acting as kill switch.
Frans,
I think for all the effort in getting the battery out, it might be better to
get yourself out. Why not open the door which will no doubt tear off, and of
course wearing a shute, jump clear? Now what we need to discuss is the most
appropriate manoeuvre to put the a/c into so that when "we" depart the a/c,
we don't hit the tail, or it doesn't hit us. I am suggesting an inverted
bunt might be the best, but you need to remember to undo your belt before
you do it. So, maybe we connect the rope that was to eject the battery to
the door, and to the seat belt restraint? Then, when the door is opened it
pulls the rope, which disables the seat belt attach? If the bunt became the
manoeuvre of choice, we could harden up the system and make the rope
attached to the door, undo the seatbelt restraint and also deploy a drogue
chute in anticipation of the bunt manoeuvre? Of course that would only give
you a minuscule amount of time in which to roll inverted and bunt, to spit
you out before !
your drogue shute drags you through the aft part of the a/c, but, thats an
incentive to get on with it, so no "chickening out". I reckon we can work
more on this rope idea, for lots of other functionality. I suggest a rope
thread.
Reg
late at night, too much soccer, and beer. I would have been OK had Frans
not provoked me. ;-)
On 18/06/2010, at 11:47 PM, Frans Veldman wrote:
>
> On 06/18/2010 06:30 AM, Tony Renshaw wrote:
>
>> is there another way of achieving this same goal? I suppose in the case
of a crash it would mean that you would have voltage still coming forward
>
> Thinking about it, and your electron aversion...
> Why not connect the battery via two plugs that can be pulled apart.
> Make a hatch below the battery, closed with a safety pin, connected to a
> rope leading into the cockpit. No fancy electrons needed.
>
> In an emergency, on final for your crash landing, pull the rope. The
> weight of the battery will for sure pull the plugs apart on its way out.
> Bye bye battery.
>
> Advantages:
> 1) No fuses, no switches, no wires, no relays, no mess. No female
> electrons to bug you during final on your crash landing. Just a rope and
> pin. People have relied on these for ages for various of purposes. Every
> mechanic understands how it works.
> 2) There is nothing to spark left, no relays that can switch on again
> due to the forces acting upon them, no battery that might get punctured
> by your elevator mass balance arm and emit a shower of sparks as a
> result, your knee can't bump into the master switch and power up the
> ship again during the most critical stage of the crash, everything with
> sparking ability is just simply dumped overboard.
> 3) The aft-mounted battery won't bump into your head, it is already
> gone. One thing less to worry about.
> 4) The reduce in weight might well be an advantage in getting the
> aircraft to a stop. The lighter the aircraft is, the less mass you have
> to decellerate.
>
> Just keep it simple.
>
> Of course you have to attach a red "for emergency use only" label to the
> rope and brief your passengers not to pull on it while asking "what is
> this for" when your are circling his home vilage. If you want to be
> fancy you cat attach a small parachute to the battery. This has the
> additional advantage that you can test the system overhead your airfield
> and it won't cost you a new battery.
>
> Frans
>
>
Checked by AVG - www.avg.com
04:35:00
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