"Our oil filter costs a lot less than a new engine!"
These kits feature an accordion internal filter medium of approximately 2000 square inch area capable of stopping particles as small as 25 microns.
The filter can be changed in a few minutes, as easy as changing the filter on your pickup!
Bypass characteristics are very favorable, full filtration occurs at normal operating temperatures even during full throttle takeoffs.
COMPLETE INSTALLATION KIT PRICING
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The Sky Tractor spin on oil filter kit is the original radial engine spin on filter kit with more than a thousand kits in service today.
The high capacity filter is capable of filtering up to 30 gallons of oil per minute at 180 degrees F. operating temperature, which is 2.5 times the return oil flow capacity of the R1340 engine.
Dependable _ Proven _ STC'd
Pratt & Whitney radials were originally designed with inlet oil screens as the sole means for preventing foreign material from circulating through the engine oil system, and these course screens were considered adequate at the time. TBO's back then averaged about 150 hours. Lubrication technology has advanced quite a bit since then, but as far as filtration is concerned, P&W users are still in the 1920s.
Today's automotive engine is protected by an oil filter. The comparative costs for an automotive engine don't even come close to the cost of a R985 or R1340 overhaul. Consider also, that nowhere in your automotive engine can you find a parallel to the blower bearing in a P&W, which operates under a .003” preload at 23,000 RPM. Also, the breather system in modern automobiles is sealed, whereas your airplane engine is open to the elements.
Try this next time you change oil in your Ag Cat, Thrush, T6/SNJ, Air Tractor, Weatherly or Beaver. Clean the screen with solvent, and then put a small amount of sand, metal filings, or other small particles in the screen. Hold the ends closed with your hands and shake lightly over a piece of white paper. You will find that everything under about .016” of an inch goes right through the screen. The average particle of sand is about .010” of an inch, also carbon, steel, and particles of aluminum from normal engine wear will circulate freely through your engine.
The effect of such debris on valve guides, bearings, and cylinder walls aren't hard to imagine. After market filters previously developed for radials have been the canister type that are expensive, require non-readily available elements, and cannot be easily serviced.
Sky Tractor Supply's STC'd oil filter kit features an accordion internal filter medium of approximately 2172 square inch area capable of stopping particles as small as 15 microns. External dimensions are 12-inches in length by 5-½ inches diameter. The filter can be changed in a few minutes - as easy as changing the filter on your pickup! Bypass characteristics are very favorable, full filtration occurs at normal operating temperatures even during full throttle takeoffs.
Here's how the filter can pay for itself in short order:
Obviously it can help prevent sudden failure and extend your TBO.
Normally your oil simply becomes contaminated long before it loses lubricity. By preventing the contamination, you have the option of increasing the period between oil changes by a factor of two - and still have oil that's in better shape. This alone can pay for the filter in the course of one engine run, and it makes life easier when you get busy.
If you should have an engine failure on a filter equipped engine, your oil cooler, tank, prop, and prop governor will be protected from contamination - and the fact that the engine is not force-feeding metal to itself can have an effect on how long it continues to produce usable power.
Replacement filters easily available.