Wiring runs

uk_figs · #1 06-04-2007, 05:08 PM

on the 7/9 when running the wires from equipment in the rear (EDC-10A, ELT etc) and aft of the spar center section (stick controls etc) forward to the panel do most people run the bundles through the center section (through the snap bushings) and then through the center tunnel where the fuel lines are and then up behind the firewall to the panel?

jlfernan · #2 06-04-2007, 06:43 PM

That's what I'm planning on doing. I'm also curious about how to run the nav lights, three wires run to the switch or one wire to a terminal strip, say under the seats? I'm trying to conserve space in the snap bushings but don't want it to look cheesy.

vbpiper · #3 06-04-2007, 09:55 PM

Van's plans show the wire bundle running forward on the right side in the tunnel, and up the firewall just to the right of the recess, secured with a cushioned clamp near the top.
As for the nav lights, I ran one wire down into the tunnel from the switch, then used a butt splice to run three wires out to the lights. Cheap, light, easy to replace a wire if I ever need to.
Ward

uk_figs · #4 06-05-2007, 07:59 AM

I must have missed this, which drawing??

vbpiper · #5 06-06-2007, 11:47 AM

It is on one of the drawings in the FWF kit. I'm at work so I don't have the specific drawing number. Sorry.

Radomir · #6 06-06-2007, 11:54 AM

I installed two conduits.. one on each side.. it's surprising how many wires run back there.. nearly both are full.. and my system is somewhat simple (eg. no antenna coax going back there etc..)

of course, this is so much easier done during initial construction of the center fuselage.

Rene Bubberman · #7 06-06-2007, 01:26 PM

We started with two conduits, one through the middle and one on the side, see: http://websites.expercraft.com/PHVII...y&log_id=11984 In the end we even installed a third on the other side. It adds up quite fast, especially if you want to have some functionality on your stick (s), and if you need connections to sensors in the back or in the wings.

uk_figs · #8 06-06-2007, 03:13 PM

Interesting, where your center conduit exits the tunnel is where the facet fuel pump is mounted on mine. I will have to check the drawing in the FWF to see what Van's suggests (I have not looked at all these drawings yet).
I would think you could run a multiple conduit runs through the tunnel and have them exit below the heat distribution box on each side through grommets. This would be fairly neat but I do not know if they would interfere with the rudder/brake pedals.

mike newall · #9 06-06-2007, 03:26 PM

One of the problems with the prints is that they sneak important bits of information on prints which have nothing to do with the version you are building !

So, if you are building a 7 tip up, there is important stuff on the 7A slider print #XX.

Does my head in - I tell you !

We carefully filed all the trainer wheel prints away and we are now using them again

zkvii · #10 06-06-2007, 05:03 PM

Hi,

It gets busy.... No 'right' way, but for some ideas....

Under the P1 seat we have 3x DB9 + 1x 3way molex. The DB9 provide links / joints for the trim servos, stick connections, flap sensing. The 3way molex is the break out for the nav light power.

For the forward tunnel, we have the high pressure pump and 'loads' of cables. We ended up 5 conduits, 2x 3/4" plus 3x split 1/2". We ended up putting everything through this space, in hindsight I might have used the upper routes more for things like the static / pitot lines. The hardest part was getting the right distribution so the fuel line plumbing and the cables / tubes / coax going aft didn't chaff / rub / interfere.

In the main push rod tunnel we started with a bundle of cables, but I decided it was likely going to rub on the rivets on the bottom skin. Therefore we ended up putting that in tube too.

Just another option - not flying yet, so don't know about maintenance problems.

Regards,

Carl