Tag Archives: falling leaf

Wings of Freedom

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The annual Wings of Freedom Tour is going on this weekend at the Livermore airport. As we pulled up beside our hangar, a B-17 Flying Fortress “Nine 0 Nine” was going through its run up check prior to takeoff. The Collings Foundation offers tours on its fleet of WWII aircraft as they tour around the country. The sound of its Wright-Cyclone engines thumped through the air and echoed off the nearby hills. Our hangar is one of the closest to the run up area and a group had gathered for best views and to photograph the spectacle.

We took off on 25R and headed right downwind. As we were climbing, Steve spotted a B-25 on our right heading towards the airport to perform an overhead break. Very soon Steve handed me stylish eyewear, his term for the instrument hood. After maintaining different headings, Steve asked me to stall the plane. Under the hood! Without realizing, I ended up in a falling leaf stall so I did it again, this time consciously and without the hood. The plane was clearly unhappy as it bounced around in a stall condition.

Today we tried boxing the sky for the very first time. Using full rudder to move the nose to the left and right while at the same time using the ailerons to keep the wings level. After a few boxes, we headed to the New Jerusalem airport. It was pretty close by and we had quite a bit of altitude to lose so we did a side slip with nose slightly nose down and fully cross controlled. We did 5 touch-and-go at New J before heading back to Livermore.

As we got close to Tracy to turn west towards Livermore, the B-17 passed ahead of us and we followed it all the way to Livermore. He was lower so we didn’t have any threat from wake turbulence. We did watch where he landed so we could touchdown farther to avoid the wake turbulence on the runway. The bombers were done for the day and we taxied past them on our way to fuel.

had never seen these WWII aircraft in airworthy condition, let alone flying or taxiing amidst these heroes. Today was a memorable day! Here is the full flight track for the day.

Falling Leaf Stall, Ground Reference Maneuvers, Touch and Go

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Winds 230@12, foggy morning but we saw some holes in the south east sky. So we are going to poke through it because east of the hills is supposed to be clear weather. The climb was quite turbulent as we stayed low below the clouds, but high enough to clear the hills. This was the first time we’ve flown through scattered clouds. Along the way, an aerial view of Lake Del Valle with its dark green waters was quite rewarding. We kept poking through holes in the clouds and following valleys beneath to maintain the maximum possible ground clearance. Once we crossed Lake Del Valle, it was time to bank left and head for the central valley.

Srinath started with the falling leaf stall – his first time consciously doing the maneuver. As expected, the plane buffeted and was unhappy (to quote Steve) because Srinath kept the elevators aft and used the rudders to maintain wings level without letting the nose drop. Then time for a few touch and go’s at New Jerusalem. However we were too high at 2000′ and Srinath used a side slip to lose some altitude quickly.

Next, turns about a point. First around a crop circle counterclockwise and then clockwise. Next, we moved west to find a point on the ground (a house) and then turns to the left and then the right. Along the way, we heard on the radio that skydivers were jumping off  an airplane at 13,000′ over Lodi airport.

Falling leaf stall

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We started with an engine out simulation as we were climbing on downwind leg out of Livermore. Steve explained why we couldn’t go back to Livermore – because of headwinds if we turned towards the airport. After scouting a place to land, we quickly pushed the throttle back in and climbed on.

After we crossed the hills east of Livermore, Srinath tried three power off stalls. On the second one, the stall wasn’t fully reached before recovery and that is clear from the video where the nose didn’t quite drop.

Next, Steve showed us something new [2:55 into the video]. He forced a stall and instead of relaxing the back pressure as we usually do to break the stall, he kept it all the way back. So the plane continued to be stalled. One of the wings (left) dropped and without using the ailerons, used only the rudder to pick up that wing. [In the audio, Steve misspeaks about the right wing being down and using the right rudder to compensate]. Then he asked Srinath to hold the elevator all the way back and use only the rudder. He later mentioned that it was called the Falling Leaf Stall.

I needed to research this maneuver because we didn’t discuss it further that day with Steve. It turns out to be an uncommon high air work and found this article in the AOPA Flight Training magazine from 1998. In short, by keeping the wings level this maneuver makes the plane resemble a falling leaf. As the wings rock, it is picked up by using opposite rudder. In a stall, the ailerons have very little to no authority. The rudder is above the turbulent air flow washing off the wings and hence still has authority allowing the yaw to compensate for dropping wings.

We got to about 2000′ MSL and we ended the maneuver by breaking the stall and powering up the engine. Next was turns around a point and then figure 8 turns. Winds were from 220 at 21kts so that certainly made the ground references challenging.

We proceeded to Byron. Winds were from 220 at 22 gusting 29. It has been the most sustained turbulence we have experienced thus far in training. Srinath suggested we’d land on Rwy 30 which was the wrong choice. So Steve decided to give us an education by attempting the landing and then doing a go-around when the full rudder deflection wasn’t sufficient. The plane was visibly crabbed at an extreme angle and that was still insufficient for the launch. After the go-around, Srinath did two landings on Rwy 23 before heading back to Livermore for a landing well after sunset.