What's Under Your Floor?

Snoho3 · #1 10-18-2016, 08:32 PM

Getting ready to close up my -9A floor. Both baggage and seat pans. I have installed the steps, both LH and RH. But there is seemingly a lot of empty space there, and I wonder if I should be planning any other installations in that space? Not quite sure what they might be, but thought I'd ask. Sound proofing/insulation? I am planning a Skyview system, A/P and electric trim. Will I need to run any wires through there? Maybe for the flap motor?

It would be nice to have to close up the floor only once...

Thanks in advance for any inputs.

Lars

rightrudder · #2 10-18-2016, 08:50 PM

I'd definitely run some extra conduit under the floor for future wiring.

az_gila · #3 10-18-2016, 09:09 PM

Looked like useable space to me...

ELT under a removable panel on one side.

Dynon ADSB box under the removable floorboard on the other side.

This keeps the ADSB coax short to the nearby second antenna and it helps that only 4 #22 wires need to cross the main spar... helpful in a -6 but would not be an issue in a -7 or -9.

Flying Canuck · #4 10-18-2016, 10:09 PM

I didn't have enough room in my single tunnel pass-through for all of the wires to the back. I've got a tail position light, Dynon ADAHRS, ACK ELT, electric trim, pitch servo and a GPS receiver behind the baggage wall. I've got a network hub in the back and I run the 4 wire network cable from the pitch servo back to it and I run the extra 3 wires from the pitch servo up front. I also ran a pair of wires for a baggage light back behind the wall and up. End result is a lot of wires. I ended up with another wire bundle run up under the right side floor. My floors are all removable, but I still got all of my wire runs in place prior to screwing down the baggage floor.

rockwoodrv9 · #5 10-18-2016, 11:01 PM

Not what you were looking for, but when I started working on my wiring after moving from Colorado to Idaho, I found where I had hid a bunch of silver coins and bars. I would sure have been puzzled when I went to weigh my plane!

Im my 9A, I have a FP Catto prop and light battery. I am already light up front and don't want anything behind the seats that doesn't need to be there so I have options on what to pack when traveling.

bret · #6 10-19-2016, 07:41 AM

We have the same ish fuse, I did removable rear floors, mounted on the underside R side is Dynon transponder and ADSB box on L, made a .060 plate to mount and fasten on top of center tunnel is the ELT. one big loom under there also to go to rear deck, trim, ADHRS, tail lights. Note, if you have steps, you may want to make the floors removable for possible future step repair?

DanH · #7 10-19-2016, 07:51 AM

Might want a tiny drain hole in an appropriate place. More than one RV has collected water under the floor.

Randy · #8 10-19-2016, 09:23 AM

A PC680 fits perfectly between the ribs under the baggage area floor on an RV7/9. In Subaru days I had one on each side back there. I still have Whelen flasher power supply back there. Now considering Dynon remote transponder as it will be very close to it's antenna and simplify wiring. I have been happy with my decision to make the floors removable.

bret · #9 10-19-2016, 10:00 AM

Quote:

Originally Posted by DanH

Might want a tiny drain hole in an appropriate place. More than one RV has collected water under the floor.

is this for the guys with extended range aux fuel tanks......

bruceh · #10 10-19-2016, 10:07 AM

You can run most of the wires for lights, AP servos and such down the center tunnel which stays accessible. I did put a conduit on each side, which is advisable for running extra wires and lines through. The only thing I have under the baggage floor is the bolts and blocks that hold the step weldments. After my steps cracked, I had to pull up the floor pans and get in there. Not a fun job. I would leave that space empty. Adding nutplates for access under the floors is difficult and unnecessary weight/complexity. Building a hatch or access hole is also probably unnecessary.