Firewall recess

[Dorfie]

There are three pre-drilled holes in the recess for the throttle, mixture and prop cables. They are fairly close to each other which will make the installation of steel grommets difficult.
What have you done with this? Which grommets did you use?
How much "spare" room does one have in the recess once engine mount, nose wheel and engine is installed. Are you limited to the area of the pre-drilled holes, or can one arrange things around in the recess a bit. (I am not sure what it looks like once everything is installed)
Thanks.
Johan

 

[Bill.Peyton]

I was able to use the existing pilot holes that were pre-drilled in my firewall to install these http://www.aircraftspruce.com/catalog/appages/cablesafe.php?clickkey=1549950 bushings. I used a jig to ream the outer two holes away from the center hole and was able to fit all three of these in line using the existing pilot holes. I ran my alternate air door cable directly underneath the three control cables. And yes, I realize they are aluminum.

 

[Golf Mike]

I ignored the three holes and mounted 4 spherical grommets from spruce. I mounted these starting from the right hand side of the recess.

 

[johngoodman]

I ignored the three holes and mounted 4 spherical grommets from spruce. I mounted these starting from the right hand side of the recess.

Is that the port side, or starboard?

 

[rleffler]

This is an area where I would recommend not following the plans.

Determine your choice of firewall penetrations. Then install them with appropriate spacing in the same general area. The plan holes are too close together for most of the other options.

Btw, I just posted in the forsale section some stainless eyeballs penetrations .

 

[Jackm]

Plane innovation

I had a custom one made by Plane innovations. It was a three bank unit that used the components from these. It supports the cables as they pass though and provides fire proof seal.
http://planeinnovations.com/firewall-penetration-kits/product/37-firewall-penetration-kit-fwf50.html

 

[flion]

Here is mine:

And here is a link to my Kitlog Entry. One footnote I'd add, now that the fuselage has the engine mount installed, I'd have inverted the group of penetrations or lowered the entire group by an inch or so. Now I have to aim the cables to dodge the mount.

 

[Dorfie]

Thanks for all the replies

I now have pretty good understanding of the space available and where to place the penetrations.
Much appreciated.
Johan