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Re: [TowerTalk] Prop Pitch Grease preference or recommendation

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Prop Pitch Grease preference or recommendation
From: Steve Bookout <steve@nr4m.com>
Date: Wed, 8 Jan 2020 18:04:54 -0500
List-post: <mailto:towertalk@contesting.com>
Hi Mac,

I've rebuilt several P/P gear boxes and have had issues in the past with the grease being too thick in the high speed planetary gear area.  When the wx would get really cold (for VA) in the teens, it would want to turn so slowly that it would 'fault' the Green Heron controller.  This was when I had it set up for 'ramping' the speed up/down.  I would just have to change the 'ramp' setting to get it working again.

So, the last time I did any, I did a bunch of research and found Amsoil Arctic grease. https://www.amsoil.com/shop/by-product/grease/arctic-synthetic-grease/ The performance ratings are fine and comparable to other greases, but it's good for really low temps.  The viscosity reminds me of hair gel; not really thick at all.  And, it synthetic!  Temp range of -75 to 315 degrees F.

I put this stuff in three small P/P's, but have not used any of them yet (spares), but I think it will be a fine choice.

Hope this helps.

73 de Steve, NR4M

On 1/8/2020 5:04 PM, Mac wrote:
After years of quality service and dependability I have my PP on the ground and want to repack the case with the most reasonable source of grease to use to repack the so called gearbox as I have long ago forgotten what I used 15 plus years ago for this effort. Additionally any source beyond cutting out and making my own replacement gaskets is welcomed, as an experience K7NV is not receptive to providing these unless he has also reworked or rebuilt the PP in question

Comments and suggestions welcomed.

thank you:  mac/mc  w5mc

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