Tag Archives: crosswind

$100 Hamburger

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A few of us at work decided a couple of weeks ago to plan a fly-in to Sacramento Executive airport (KSAC) and have lunch at the Aviator’s Restaurant in the airport terminal. Earlier in the week, some of us met to discuss routing and other considerations for the fly-in. I was the only student in the mix and the rest were planning to arrive from Tracy, Reid-Hillview, Palo Alto and San Carlos. This would qualify for cross-country time in the logbook since KSAC was 51nm from KLVK.

My route would take me over the east end of Los Vaqueros reservoir, then directly to the Sacramento VOR and turning right to the airport nearby. On the way at Walnut Grove are three tall guyed radio towers which are each over 2000′ tall and one of the tallest structures in the world. Just for comparison, the World Trade Center towers were only 1368′ and the Eiffel Tower is 1063′ tall.

I met my CFI at the airport terminal at 8:30am to get a cross-country endorsement in the logbook. Previously I had briefed via Foreflight on my iPad for the weather and NOTAMS. It was going to get windy in the central valley starting around 11am but the winds were forecast to die down late in the afternoon at KSAC. The winds might still be right around my crosswind maximum of 10kts at KLVK so I discussed with my CFI that I will not takeoff until late in the afternoon and keep an option open to divert to KCCR Concord Buchanan airport.

To beat the winds I took off early and was airborne at 10:15am. Livermore tower now can initiate flight following and I had a squawk code dialed in before takeoff. Runway 34 is closed until Feb 15 and the winds were 320@7 favoring runway 30 and I was parked next to the terminal at 11:04. It took longer than the estimated 36 minutes for two reasons – the headwinds were stiffer than the forecast 335@17 at 5500′ cruising altitude and I forgot to lean the mixture for maximum engine performance.

Food and ambiance were quite good at the restaurant – I ordered a “$10 Pasta”. The seating area overlooks the taxiway and runway 02/20. We had a 13 people show up in 6 planes – one was a Lake and the rest were Cessna 172.

As we were lunching, the winds began howling outside from 320@17-28. Around 3pm the first plane (C172) from our group took off and we could see the wings rocking side to side as the pilot maintained runway course against the stiff crosswind. The rest of us hung out for another 30 minutes and slowly dispersed. I remained at the terminal checking the weather at Concord, Tracy and Livermore. Tracy was another option because the winds were generally lined up with runway 30.

Around 5pm I texted my CFI about my intentions to fly to Concord since the winds were from 360 and runway 01 would have been fine. Livermore had started to look better and he asked me to monitor that as well. I finished pre-flight, fueled up and called up ASOS one more time at both Concord and Livermore. When I took off from KSAC winds were 310@21-27.

KLVK 110053Z 01008KT 10SM CLR 19/M08 A2991 RMK AO2 SLP126 T01891078

The crosswind at Livermore was within my limits so I headed direct with the option to divert to Concord if needed. Climb out of Sacramento was bumpy but once I reached 4500′ cruise altitude, it was smooth air with a healthy tailwind. My airspeed was around 105 and at one point my ground speed was 138kts! En route, I saw the sun set in the west and in 25 minutes I was over Las Vaqueros reservoir. As I began my descent the winds picked up once again over the Livermore hills and tower first reported winds 340@8-21 and then 320@5-21 when I was on short final. The cross winds were quite stiff requiring full left rudder and right aileron to stay aligned with the runway on a forward slip. The landing was challenging but I was able to stick the landing. I was glad to be back safely on the ground, parked at 6:09pm, just within the 30-minute window after sunset at 5:41pm that my CFI had set as the limit.

In retrospect if I had had to divert from Livermore to Concord, it would have been a night solo for which I wasn’t endorsed. Departing 30 minutes earlier from Sacramento or heading only for Concord would have been safer options.

Calm Winds ?!?

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My first time flying solo from start to finish. ATIS indicated calm winds on this morning. Right from the time I took off, the ball wouldn’t be centered and I didn’t realize there was a stiff crosswind from the south (my left). That unnerved me although you couldn’t tell from the video. My turns were shallow and the pattern was really wide. After just one lap around the airport, I pulled off and waited for a while near the fuel station. Thats when I saw that the windsock reflected a stiff wind. I was in half a mind whether to go back up and after a few minutes of reflection, decided to call it a day. This was the shortest duration I’ve flown so far.

ATIS is generally recorded once an hour and as was evident today, if the weather changes quickly then ATIS isn’t accurate. Also, ATIS reflects winds at the surface and the speeds above the surface can be quite different due to the lack of surface friction and other obstructions.

Crosswind landings, stall recovery under instruments

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We started off with Steve handing me stylish eyewear i.e. flying under the hood. After maintaining a heading and then tracking a VOR, I practiced two stalls in the clean configuration and recovery. Using only instruments under the hood. Then I practiced an approach to landing stall. First by initiating a descent, slowing down to 1500rpm and deploying flaps. The idea is to simulate a landing approach. Then pulling up the plane in this configuration and initiating a stall the plane. Recovery is similar to a stall in the call configuration with the exception that we have flaps deployed. So slowly retract flaps step by step when a climb has been achieved.

Next, I practiced slow flight with shallow turns. And then Steve pulled the power out simulating an engine out situation. We scouted a field and when we got pretty low, Steve pushed the throttle and we headed over Byron.

The winds were really strong at 20kts but fortunately it was a headwind on Rwy 23. Still the ride was really bumpy, perhaps the bumpiest of all our flights thus far. We practiced a couple of touch-and-go and then headed to Livermore for a couple more.

On the second touch and go at Livermore, we ballooned after touchdown due to the wind so Steve immediately did a go-around. I wasn’t quick enough to react and this was a good learning experience. After one more landing, we called it quits for the day.

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.