Flying the ridge

One of the great things about soaring is discovering that other people are just as much in love with it as you are.  Today I went out to Harris Hill to give some support to the members who are in training.  Turns out there weren't that many students there and the tow pilot was only good for another 1/2 hour or so.

BUT.  The wind was practically straight out of the north at about 12 knots.  That means RIDGE flying, boys and girls!  I grabbed a glider and just before I got into it, one of our members, Graham Hall, joined me for what turned out to be a delightful flight!

After we cleared the edge of the ridge on takeoff, the expected elevator-o-lift kicked in and we were climbing out with the vertical speed indicator pegged at 10 knots!  The whole tow to 2,000 feet took just one circle.  Graham was flying and we cut loose and headed for the nearby ridge.

The lift was there, just as expected.

When wind blows against a tall hill, and particularly a ridge, it will strike the ridge and continue upward.  As long as the wind continues to blow, the lift from that ridge will continue upward.  If your glider descends at 200 feet per minute and the wind blows upward at greater than 200 fpm, you will go UP.

That's where we found ourselves on this particular day.  We shared the ride along Harris Hill and the ridge with a 1-34 and a Duo Discus as we flew back and forth along the ridge.  Graham flew some, then I flew some.  Graham found some lift at one edge of the ridge and circled in it, at one point getting us up to 3,500 feet - just 200 feet below where we let off to begin with.

The setting sun was beautiful, the day was crisp and clear, and we could see the all the way down to Mansfield, PA where the windmill farm is.  It was just gorgeous.  Landing was uneventful and was a perfect end to a perfect flight.  Best flight of the year, I'd say!

Here, Graham's expression sums it all up as he maneuvers us into the lift:

Weather station online!

This week I completed the weather station project and was able to get it online!  It's been working properly for several days in a row and now we've got both weather observations, history, and even a webcam so you can see Harris Hill and the National Soaring Museum has a presence with their name on it out in weather station land.

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View the weather station page here: http://www.wunderground.com/weatherstation/WXDailyHistory.asp?ID=KNYELMIR5

Also, some more pilot specific pages that use the weather data are on our Harris Hill web site: http://www.harrishillsoaring.org/weather.htm

For those interested, here are the details of how the system works.

First, the system uses a Davis Vantage Pro 2 weather station mounted on our Flight Center.  That's it on the right hand side on the white pole in the photo below.  The tripod device in the center is a local weather station but it did not have the capability to place data on the internet, so we needed the Vantage Pro.

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Second, is a web cam that looks out at the flight line.  Unfortunately, the picture isn't nearly this clear, but the camera was free, so beggars can't be choosers.  It works well enough but I may see about getting something with higher resolution.

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Here's the web cam location (below, it is the white blotch with the extra cable hanging off of it above the window)

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Here's a closeup.

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The webcam uses a cable that connects to a computer (upper right above the window) while the weather station sends its data wirelessly to the console (mounted about halfway up between the windows in this photo).  The console has a USB plug that connects to the computer and downloads the weather station data periodically.

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The computer has a WiFi USB dongle that is stuck in the window of the Flight Center, below.

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Then comes the interesting part.  The Flight Center does not have internet access, but the National Soaring Museum has limited net access via a satellite connection.

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Distance from the Flight Center to the NSM is around 1,000 feet.
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At the soaring museum end is a cantenna.  Literally, an antenna made from a tin can.  Bush's baked beans, to be exact.  Vegetarian, of course.  The can is encased in a length of pvc pipe for weatherproofing and mounted on the side of the NSM pointing at the flight center.  I found invaluable instructions for how to build this on this site.

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The antenna wire is routed inside the building to a WiFi router (Linksys WRT54G) inside and a cable connects the router to the NSM internet router.  The data on the weather computer is sent to wunderground.com and the Harris Hill soaring weather pages here.

That's it!  We now have visual and weather observations for the Hill from afar.  I've already used it to gauge when the winds shifted from the South to the Northwesterly direction and make flying possible.  Other members also seem pleased with the system.

This was a fun project and one that I *thought* was within my technical abilities but wasn't sure about.  It took longer than I wanted, but in the end I'm really pleased I was able to figure out all the little twists and turns involved.  AND, now the NSM has a presence on the web so people will see what's up at Harris Hill!

Off topic bonus:  Today I flew 2 hours and 15 minutes in the ASK-21.  Good times.

Weather station update

The Harris Hill weather station has been up at the flight center for a couple of weeks and I check it each time I go up there. It's working without a problem right now.

The original console had an issue where it was very reluctant to restart if you removed power to it. I'd been on the phone to Davis tech support and gotten it working once but was unable to get it to work after I moved it out to Harris Hill.

Davis gives a one year warranty and sent me a refurbed unit that works a treat!

Now, the weather station and the computer with the Weather Link software are happily churning away and recording data.

The last mile - making that all important connection to the National Soaring Museum's internet access. To get the station online in internet land, we need the NSM's internet connection. This weekend, I scoped out how to do that with the museum's tech rep and I think we've got a reasonable solution figure out to put it on the side of the building with an easy link to the flight center. Piece of cake.

I ordered the cable needed and have been building my cantenna to make the link to the flight center. As soon as it arrives, we'll install and should be able to get online with the system!

In other flying news, I flew for 49 minutes in difficult conditions, spending most of my time spinning circles. Good practice for thermalling, which is what I'm trying to get better at. I got off tow in a thermal about 500 feet lower than normal tow height, circled for awhile, mostly keeping altitude and finally gaining a few hundred feet, then headed out to find another thermal. They were close together but didn't go very high.

I kept at it, moving from one place to another and always finding some lift. I finally managed 4,000 feet but that was about it for the height of the thermals. I'd forgotten to check my watch for takeoff time and thought I better get back in case someone was waiting to fly -there were a lot of people on the field, many of them assembling gliders.

When I got back, several of the 'pros' had been up and back down quicker than I had as they tried to stay aloft. I guess I did alright for the day!

Weather station update

Getting closer on the weather station! The station is installed, the console is working reliably, and the small computer I use to run the Davis Weatherlink software is reliably updating and operating properly.

The last link in the chain is to get the WiFi connection about 1,000 feet down to the National Soaring Museum. Yesterday, I set up the WiFi router at one end of that run and walked down to the NSM with my iPad and was able to connect to the router. I logged on to the computer and was able to use VNC to remotely control the weather station computer. No unusual methods required!

That means a simple omnidirectional antenna for the WiFi will probably work just fine. Next week I'll meet with one of the guys from the NSM and get the router installed. Then, it will just be a matter of getting the antenna on the roof and we'll be in good shape for that final link!

Trading altitude for distance

Last Saturday I was waiting for an ASK-21 to come back from a flight so I could take a spin when I realized the 1-34 was sitting out there just waiting to be flown. So, I hopped in and off I went.

The wind was from the South but would sometimes blow and sometimes stop. Takeoff was to the North. The first flight reminded me that I forgot how much the spoilers will slow you down on a 1-34! Let's just say that I 'attacked' the runway in firmly returning to earth.

I took another ride, hoping to dust off the cobwebs. It was an odd day with shear and broken up lift aloft. The tow line went slack once and I carefully swung the nose out to slow the ship and take keep from putting a shock on it as the line went taut again. I was able to find zero sink but never sustained lift. I'd gotten aloft after a high overcast shut off the thermal activity, but no matter. This was more about wounded pride than staying aloft.

When landing into a South wind at Harris Hill, the wind blows up the backside of the hill and curls over and down into the valley at the northern end of the runway. That's the end that you cross on final approach when landing into a South wind.

I kept my pattern high and close on base leg and turned final with quite a bit of altitude. The wind sock was showing about 10 knots or a little less as I opened the spoilers and started to slip hard to lose altitude. This time I had my speed right as I descended down final when suddenly I started to lose altitude very quickly. I was in the waterfall.

Fortunately, I had been expecting it so I closed the spoilers and accelerated to 75 knots, pointing the nose down to get to that speed. The edge of the landable area was getting pretty big pretty fast. I started to mentally calculate when I should break off and make a turn to go back into the valley when suddenly the descent rate decreased. I was through it.

I pulled the nose up and tried to slow to 55 for landing. Suddenly, I'd gone from landing way short to looking like I might go long! No matter, I put the spoilers out full, slowed to approach speed and then closed them to about 1/3 as I got close to flaring out for landing. I bobbled a bit but managed to touchdown precisely where I'd been aiming and made a credible touchdown and stop.

I'm still rusty, but looking forward to more flying soon. The weather this Spring so far has been nice only when I'm working and a bit crummy when I'm flying. Hopefully that will break soon and I'll get some thermaling practice in.

And he's Current!

At today's Wednesday night training session, I completed my 3rd flight in the past ninety days, making me FAA current and legal to carry passengers on flights. I've completed my annual safety check ride, I'm current, and the season has just begun. Life is good.

Today, the winds were pretty strong out of the south all day but were predicted to change to the northwest and drop to under 10 knots. That's not exactly what happened, though.

When I arrived at Harris Hill, the winds were out of the northwest alright and dropping but after I got into the glider, the windsock went limp. I took off in what must have been a lull. Upon getting airborne, it was clear that the atmosphere was unstable with gusts and bumps all the way to altitude that got gustier rather than smoother as is usually the case.

I headed upwind looking for any signs of lift but when I found it, it was choppy and not very large. I flew 45 degree circles trying to stay inside it but finally decided that they weren't thermals after all but instead were gusts being blown up after hitting the ridge below.

The wind switched all the way around to the Northeast after I got to altitude and picked up again, necessitating a North landing with an eastern crosswind component and gusts. I stayed close on downwind, carried some extra altitude into the base leg, keeping it quite close as well, and turned onto final. I was determined to pick out and land on a specific spot, not too far down the runway but not too close from the threshold and get it stopped before the taxiway.

I nailed it. I did let my airspeed slip a bit on final but got it back to approach speed and put the glider precisely on the spot I wanted to land on, kept wings level, and kept flying it all the way to the stop, easily finishing before I got to the taxiway. I let the brake off, coasted onto the taxiway and stopped. Beautiful. A nice confidence builder.

So, now I'm ready to fly. I need some lift, first of course! The weather isn't too promising this weekend, but we'll find a day soon to practice thermal centering and climbing. I've been reading Kai Gertsen's Cross Country Guide and it is jam packed with practical advice. I'm preparing for cross country training this year and expect to be a much better pilot by the end of the season.

Weather station takes a step forward...

Saturday, I managed to get the HHSC weather station mounted. Thanks to Burke Carson and Doug...sorry Doug, I forgot your last name! Both were a great help to put the station up on the side of the flight center on a REALLY blustery day!

It's not perfect, of course. I chose to use a length of pvc pipe about 8 feet high but when we got it up, it's not really as rigid as I hoped for and it oscillates in the wind. And the day we put it up, the winds were pretty strong - 20 gusting to 30 mph.

I think we'll have to replace the pipe with something metal, unfortunately. I shouldn't have tried to cheap out on this part of the install.

Ominously, the blasted console is also giving me a lot of trouble powering up. I'm going to have to call Davis wether systems, It had this issue before.

Meanwhile, I've purchased an Ebay WiFi router and some parts to build a cantenna for the museum WiFi connection. The parts should be here soon.