flyrotary@lancaironline.net Mailing List Archive

Looks like a nylon rod drilled, chamfered and cut to length with a saw. I guess it must also have been sanded to the thickness required for the drive it was supplied with.

Nothing fancy and definitely does not look like an of-the-shelf item.

I'll try to remember to ask him exactly what material next time I see him.

Something else must be going on here. You don't have a restriction in the oil supply line, right?

Finn

On 4/28/2021 4:13 PM, Matt Boiteau mattboiteau@gmail.com wrote:

The end play was good. Metal ruler across and could just see daylight across.

Neil's uses a rubber oring, so we test endplay without it. Then adding the oring will add the nessessary clearance in end play.

The one Neil supplied was either nylon or Teflon flat washer and it melted, so removed it. So talking with him, switched it out to the oil embedded one. Again, just a flat washer.

Anyone have more details what Tracey used? Like a spring washer made out of nylon?
On Wed., Apr. 28, 2021, 14:16 Finn Lassen finn.lassen@verizon.net, <flyrotary@lancaironline.net> wrote:
Too little or too much end play?

Tracy specifies 0.005 to 0.035"

Note that if you check it without RTV, it may increase when you assemble it.

Finn

On 4/28/2021 1:05 PM, Matt Boiteau mattboiteau@gmail.com wrote:
I have one of Neil's 3.17 psru with Tracey's cushion drive. *I also sent Neil an email but it's late in the night in Australia.

After my fly off hours, tearing down the plane to inspect everything. The Ultra-Low-Friction Oil-Embedded Thrust Bearing is broken into pieces.

https://wwwmcmastercom/7421K28/

The nylon or teflon washer supplied just melted. I thought I nailed it with a fix using the oil-embedded, but I guess not.

I think in Tracey's documentation, he called it a snubber ? Any ideas what I can use, or why this happens?

- Matt Boiteau
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