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Permalink Reply by David J. Beaulieu on September 16, 2015 at 8:54pm

Gary - not sure if this helps but in AC 43.13-1B, Table 9-3 there is a min bend radius of 3" listed for 1/4" MIL-H-8794 type hose.  For MIL-H-5593 type hose I found a formula (for any size) equal to 12 x inside diameter.  Using that relation yields a min bend radius of 3" for 1/4" hose.  Good luck and hope this helps with your decision.

Dave

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Permalink Reply by Gary Welch on September 16, 2015 at 9:59pm

I think that's the exact answer I was looking for.

I am looking at about a 6" radius so I'm well above the minimum. I had an EAA tech counsellor look at a hose bend I was contemplating in another location and he pointed out it was too tight a radius. I never thought to ask him at the time what a recommended minimum might be.

Thanks for the help! I appreciate it very much.

Gary Welch

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