• The Biplane Forum is a large global active community of biplane builders, owners and pilots. From Pitts to Skybolts, to older barnstormers, all types are welcome. In addition to our active community, our content boasts exhaustive technical information which is often sought after for projects and maintenance. This information has accumulated over the 12+ years the forum has been in existence.

    The Biplane Forum is a private community. Subscriptions are only $49.99/year or $6.99/month to gain access to this great community and unmatched source of information not found anywhere else on the web. We are also a great resource for non biplane users, since many GA aircraft are built the same way (fabric and tube construction). Annual membership also comes with two BiplaneForum.com decals.



O-360-F1A6 rpm/map

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Joined
Dec 17, 2019
Messages
8
Reaction score
2
Location
Star City, Arkansas
I have an F1A6 on my Starduster. The prop gov is brand new. In my installation, my prop cable comes from the oil sump mating area and up through the baffling, so the entire head of the governor had to be clocked one hole clockwise. On run up, the prop won’t cycle below 2000 rpm. I get 2700 on takeoff, but I never hear the governor “catch” it. In flight when I pull the throttle back, the rpm comes down before the manifold pressure moves, acting like a fixed pitch. I moved the splined shaft one tooth at a time on the arm until I got a good cycle at run up, but then the governor “catches” the rpm at 2350 even with the low pitch stop screw all the way out, and I get a manifold pressure drop with throttle reduction, but before it squares up, the rpm starts to drop like before and it runs over square all the time. I moved the shaft back where it was…the prop is fresh, less than 4 hrs. The only thing left I can come up with is prop cable travel. Am I in the ballpark? If I weren’t bald, I’d be pulling my hair out. Got to be a simple issue I’m missing, I’ve always been taught that you’ll never be bitten by an elephant, but a mosquito will wear you out. Thanks in advance
 

Latest posts

Back
Top