Watch out for bird nests

I recently had a really interesting cross-country trip. It featured virgins, dirt, avian invaders, and tractors.

Some local friends talked me into running the American Odyssey relay race: just under 200 miles from Gettysburg to Washington, DC, over two days. (Look for a race report in the near future.) Some of my teammates were flying commercial, and some were driving, but I found three hardy souls who volunteered to go with me. Jim’s a Navy officer who’s used to airplanes of all sizes, but neither Rese nor Melissa had flown in a small airplane before… so they’re the virgins in this story.

I’d planned to fly from Decatur to New River (PSK), fuel up with avgas and diet Coke, and then fly into College Park, MD (CGS). This would allow me to use my fancy secret code to fly into the Washington DC ring of restricted airspace. However, because we were staying in Harpers Ferry, it didn’t make sense to fly 60+ miles to the east just so we could have extra drive time going back to Harpers Ferry. I decided to go into Martinsburg (MRB) instead to avoid the extra driving.

We departed on schedule, with about 1500′ ceilings leaving Decatur. A front was on its way so my goal was to get us to our destination before the weather got bad. We benefited from an epic tailwind– my normal cruise speed is about 135kts but I was seeing over 200kts for a good part of the first leg.

Unfortunately, with wind comes bumps.. so one of our crew (I’m not saying who) needed to use a barf bag. No major damage, thankfully, either to the victim or the airplane. Apart from that, the rest of the flight was uneventful– a quick stop at PSK for fuel and diet Coke and we were on our way. Potomac Approach made me fly the RNAV 26 approach even though the weather was VFR. Martinsburg is home to the 167th Airlift Wing, so there were a bunch of big gray C-17s on the ramp. Always a fun sight.

Aero-Smith, the local FBO, had prearranged a rental van. It was waiting, so we loaded up and off we went. The next couple days were a blur– I had a fantastic time at the race. All too soon, though, it was time to head back home, so I planned our flight to follow roughly the same route. While the big front had passed through, we were still forecast to have 20+ knots of headwind, so I tried to choose a more southerly route to reduce the wind penalty (spoiler: that didn’t work). I’d planned the first leg from Martinsburg to Ashe County, NC, then home.

We got to Martinsburg safely and turned in the van. The FBO lineman offered me a box of rubber gloves. “We saw a lot of birds on your airplane,” he said. “There’s probably some poop on it.” I’ll take “things you don’t want to hear at the airport” for $200, Alex!

I walked out to the plane, which they’d parked on the far edge of the (empty) parking area. I saw a few poop spots and used a gloved hand to remove them. Now, this next part is relevant: I usually start my walkaround by turning on the master switch, existing the forward passenger door, and walking back down the right side of the plane, around the tail, and up the left side– finishing at the engine. That’s what I did… except that when I got to the engine, I noticed what looked like a few pieces of grass sticking out. That certainly wasn’t there when I parked the plane, so I poked a flashlight into the front of the cowling and was surprised to see some more grass.

That led me to remove the upper cowling, whereupon I found this (click it to see the detail).

Yep. In two and a half days, the forces of evil invaded my cowling and built two large, flammable nests. I started pulling out handfuls of grass and twigs, and the other three came to help. All this action attracted the attention of the FBO staff, and they brought us a handheld leaf blower.

Now, a brief note. Air-cooled piston airplane engines work on a principle called pressure cooling. Baffles inside the cowling drive airflow from top to bottom, not back to front, to cool the cylinders. When you look at the picture above, what you can’t see is that there are only a few small openings under the top deck for air to flow down– making it very difficult to get all the bird debris out with a leaf blower. We ended up having to spend 30 minutes or so picking little sticks and blades of grass out of the engine compartment. Here are Rese and Jim doing just that:

Once that was finally done, I wanted to run the engine with the cowling off, whereupon I discovered a failed cell in the battery.. so the plane wouldn’t start. This was not popular with my passengers. Or with me, for that matter.

The FBO staff was very reluctant to help start the plane. They claimed not to have a ground power unit, but I eventually talked them into bringing their tow tractor out so I could use my jumper cable. The problem with this cable is that after the plane starts, you have to unplug it, and the FBO guys didn’t want to do it “for liability reasons.” Thankfully Jim wasn’t a big baby like they were, and he volunteered to pull the cable after engine start. We deployed the tractor, got everything hooked up, and the engine immediately started up.

Once we got up to altitude, we got a 1-2 punch from the headwinds: it was bumpy, and we were only making about 105kts over the ground– so less than half of our groundspeed on the way out. After a little fiddling, I got permission to climb from 8000′ to 10000′; as we slowly climbed, we got bounced around quite a bit. To make things worse, the wind was even stronger at 10000′, so we went back down to 8000. It was a steady parade of mountain waves, something I hadn’t spent any time dealing with before. Frankly I didn’t much care for them.

As we got closer to GEV, the wind diminished a bit, although not enough to give us any appreciable speed increase. The Ashe County airport sits at about 3000′ above sea level, and the airport description helpfully notes “RISING TERRAIN ALL QUADRANTS,” so flying in means dealing with shifting winds funneled in various directions by the surrounding terrain. Despite the wind, I stuck the landing, and we were well and cheerfully served by the airport manager, who coaxed the balky full-service pump into working long enough to fill the tanks. I’d happily stop there again. (Note that KGEV has no AT&T cell service and no diet Coke in the soda machine, so plan accordingly.)

There was a good-sized line of storms stretching from south to north moving through Mississippi when we left. Our original plan was to get home before it arrived, but due to our de-birding time, there was no way we were going to make that. As we flew, it became clear that the headwinds were going to prevent us from making our alternate at Winchester, so I decided to stop in Chattanooga, which has rental cars, nearby hotels, and food.. just in case. We landed and found the ramp crowded with more expensive airplanes that had obviously stopped for the weather as well. Luckily the FBO had one crew car remaining, so we headed out to look for dinner and wait for the storm to pass. The city got roughly 1/4″ of rain in the hour we were at dinner, but it had tapered off to a light drizzle by the time we got ready to depart. I pored over the radar and it looked decent if we flew a little to the northwest, more towards Winchester, and then turned south, so that is what I planned for.

Once airborne, I quickly saw that the radar depictions didn’t give the full picture– they showed rain, all right, but the clouds were well above our altitude, so for most of the flight we flew through falling rain but still had decent visibility. The picture below shows what the radar depicted (they’re different, but that’s a topic for another post). After an uneventful trip, with mostly smooth air, we landed at Decatur, packed up, and headed home.