No sweat, I'm just paranoid about weight Mark. Even the thought of putting an extra couple of bolts on the engine to plug those oil injection holes bothers me <G>
I do appreciate your concern for the gearbox since I worry about each and every one that goes out. I had to cringe when I saw that setup at the last Rotary Roundup fly-in with the 275 HP V6 outboard engine & RD-1C. He used the engine oiling system to lube the drive but that engine had only 15 psi and it was 2-stroke oil.
I liked the basic idea (I flew an 135 HP OMC in another life) but a separate oiling system is needed.
Tracy
On Tue, Mar 25, 2008 at 1:01 PM, Mark Steitle < msteitle@gmail.com> wrote:
Tracy,
I just don't want to destroy the gearbox because I didn't change the oil often enough. Sounds like a plan.
Mark S.
On 3/25/08, Tracy Crook <tracy@rotaryaviation.com> wrote:
Lynn's got it right in my view. If your're looking for a number, I change between 50 and 70 hours using Synthetic. I go for the 15W - 50 Mobile 1 cause it has more Zinc for the gears & bearings than the lighter weights. Straight 40W Redline would be even better but I can't get it at Walmart and I'm cheap.
BTW, I use a 4 qt sump even on the 20B. I don't understand the appeal of great big oil pans. Why carry all that extra weight? Even if it means changing oil more often, I'd go for a smaller pan. On a related subject, I get asked all the time about G-forces affecting oil pickup in the pan in an airplane and the need for a deeper, bigger pan. My standard answer is that your grandmothers station wagon experiences more lateral G than your airplane ever will (unless you happen to be Sean Tucker).
Sorry for the sermon, I just got asked that again <G>.
Tracy
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