Wrathall Mark wrote:

Ian, congratulations for getting another wankel powered RV flying.

Looking

at the pictures you posted, it would be a good idea for you to read AC
43.13-1b again. (http://www.faa.gov/avr/afs/300/pdf/1c-toc.pdf).

Especially

the information on supporting tubes and wirings.

 A couple of thing I see:
That radiator hose hanging unsupported on the welded radiator fitting

will

likely fatigue the weld, and or chaff on the  oil filter housing. You

have a

clamp on top of the engine, but that still leaves about 12 inches

swinging

freely. It also appears to sit on the firsleeving of the fuel line.

The unsupported breather hose running between the plugs chaffing through

on

a plug.

Unsupported line (throttle cable?) running across the top of you airbox
chaffing against the cowl and airbox.

Neither photo clearly shows any clamping on the ignition leads, but that
might just be the angle.

The PSRU oiling is small diameter rigid aluminium tubing. I can see a

few

clamps there, but this is a known failure cause on other installations.

Im sure when you come to finishing the firewall forward, many of the

best

laid plans fail to work due to interference, so you just do what is

required

to get it working. It is important to then audit the installation and

modify

out as many latent failure modes as you can before vibration starts to

break

things.

Mark Wrathall
http://www.rotary.microcosman.com

Ian & Irene Beadle wrote:

Hello Mark,
Thanks for the input. I'll get clamping this weekend. The 1/8" oil line to
the gearbox in encased for some of its length in a plastic tube and another
alluminium tube.
Ian.

Ken Powell wrote:

Ian,
This gearbox oil line has caused a problem (rupturing due to vibration) on a couple of other installations. It would probably be a good idea to replace this line with Stratoflex 111 flexible aviation hose and fittings (or the equivilant) as suggested by others on this list.

Ken Powell
Ken Powell
kenpowell@aristotle.net

 
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