There is a vent drain tube that leads from the oil tank to the engine accessory case on the W-670. There is also a vent line from the left hand top of the accessory case that leads down the left hand gear leg and ends somewhere around the lower knuckle. [...]

The most common steel ground adjustable prop for the Stearman is the McCauley D-5926. This is also known as the Army Hub. The other McCauley prop which is approved for the Stearman is the D-1093, which is known as the Navy Hub. The D-1093 is approved for two different steel [...]

During the 1996 Galesburg fly-in, the subject of the ground adjustable propellers used on the Stearman came up for discussion. Several owners expressed an interest in seeing an article that covered some of the key issues associated with these propellers. The following article is an updated reprint of that article. [...]

The Hobbs meter in most Stearmans is actuated, in some, by the master switch (bad idea), and in the majority by an oil pressure switch. Both accumulate time which includes test running, warm-up, taxiing, holding short, etc., on both takeoff and landing. That is an appropriate number for logging “Pilot [...]

In talking to a large number of Stearman owners, there is a wide variation in the procedures and sequences used in starting the radial engine. The parts of the procedure include: Turning the prop through to check for hydraulic lock (fuel and/or oil lock) Additional turning of the prop through [...]

The Stearman engine control rod installation for the W-670 is pretty straight forward from the front cockpit throttle quadrant to the firewall. The mixture rod goes through the upper-inboard hole in the fire from the fustto the second belle wall, and the throttle rod goes through the lower outboard bole. [...]