FI Servo Supply Hose
 

Looking for some help identifying which fuel hose Vans sells that connects the fuel spider through the lower baffle between 1&3, and then connects to the FI horiz mounted servo. It has -4 AN fittings on each end and is approximately 20" long and probably fire sleeved.

Mike,
I don't believe Van's has much available for #4 hose assemblies.
You are a lot closer to Tom anyway and he will make the exact length you need.
TS Flightlines.

There's no law that says it has to be a hose assembly. I made mine of stainless hard line.

Vans doesn't sell it. It should have come with the engine or the FI kit or you will want to have one made up.

Mike,

Do you have any pics showing the hardline?

I am looking at doing this but don't have any good places to secure with adels.

The nearest bolts are sump bolts and are vertical.....

Do you think it would be OK to put make an "S" turn so I'll have a horizontal section to secure with a clamp?

Glenn Wilkinson

Pictures will take a bit of effort, but I might be able to describe my setup:

Forward facing servo with the fuel outlet pointing up toward case; straight AN fitting on the servo so line exits, makes a 90 toward the left wing following the oil pan rail, then another 90 to the tail still picking up the oil pan rail bolts, then another 90 "up" between the cylinders at the provided baffle cutout. I made a new baffle cover plate with a bracket and an adel here. Probably overkill but I wanted to make sure there was no baffle to line contact. As the line exits the top of the engine there are a few bends needed to attach the flow divider, and the pushrod tube happens to provide a convenient location for another adel.

Not sure what you mean by needing a bend to make a horizontal section- remember, a simple 90 degree bracket changes the orientation of the adel, so if you can't pick up case bolts, then a bracket almost always works. You definitely want a bend or two in the line simply to deal with expansion/contraction issues (general practice), but not so much that you create unsupported length. So yes, an "s" bend can work as long as it's not overdone. Clear as mud? ;)

What do you need?
 

CapFlyer/Mike

Size length, or just part number? I have the factory new IO360 M1B hanging on the hook now and will have to remove this hose and send for modification to fit the red cube.

I can get the dimensional information if that is what you need. I suspect it is a Lycoming part - is that number on the hose tag? Just let me know.

Thank you for the responses. I was hoping that it would be a simple ID of a pre-made hose that Vans sells but apparently not. I'm leary of using a hard line in this area because of vibration and being next to the hottest parts of the engine on its run between the cylinders. I think I'll just have one made locally at a place that speciallizes in hydraulic hoses plus they can pressure test it.

Whatever you decide to do is up to you, but don't cite better heat resistance as a "plus" for hose. You're not going to do better than stainless hard line in that department. As for vibration, well, "standard aviation practices" are there for a reason. Follow them, and you'll have no issues.

Michael,

Yeah, I think I have a good idea of what you mean.

Your description was helpful.

Thanks,

Glenn