J3 Cub Forum > Cub Discussions > Cub Talk > Life expectancy of a wooden propeller

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Old 10-12-2017, 01:43 AM   #11
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Thanks again

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Old 10-12-2017, 02:20 AM   #12
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As I understand it, the horizontal storage of a prop was in case it got rained on, both tips would theoretically get the same amount of water and wouldn't be unbalanced. I don't think it has any bearing on a prop that is in a hangar, unless you are in an area with significant amounts of condensation, which I admit happens in my hangar on occasion during the summer rains. Keep it well waxed and the drain holes clear.

I use Minwax spar varnish on mine. I usually strip the brass and polish it at the start of each spring, then recoat it. Really makes an impression at shows.

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Old 10-12-2017, 07:09 AM   #13
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A wooden Propeller will absorb moisture in the air, not necessarily just rain. Keeping the blades horizontal keeps the moisture absorbed from migrating to the low side and causing an imbalance. It is very important to check prop bolt torque at least every 100 hours and anytime the humidity environment changes for more than a month. Download the inspection instructions from Sensenich and follow them. The prop on my Ryan PT-22 was manufactured in 1941 and is going strong. I have Sensenich inspect and refinish it every ten years. Costs less than $1,000 for my 90 inch prop, including shipping.

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