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Thread: VSA Race Day # 6 - Saturday, July 8, 2017

  1. #1
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    VSA Race Day # 6 - Saturday, July 8, 2017

    VSA Race Day # 6 - Saturday, July 8, 2017


    The day will start with the usual pilot’s meeting in the morning;

    Appetizers and beverages will be available in the afternoon when the flying is done;

    and dinner plans may be determined at the pilots meeting...

    Options include: Restaurant, Take Out, or someone volunteer
    to organize an impromptu BBQ dinner at WSC.



    RSVP as of 7-6-2017 at 11:30

    Dismukes, Key
    Kelly, Peter
    Mayes, Ben & Angelica
    Mayes, Rex & Noelle
    Miller, Mark
    Ramm, Darryl
    Roberson, Kerry

    Pilots: 2
    Dinner: 9
    Last edited by admin2; 07-06-2017 at 11:34 AM.
    Cora J Knowles
    Secretary
    Valley Soaring Association

  2. #2
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    Re: VSA Race Day # 6 - Saturday, July 8, 2017

    Don't know what Saturday will be, but the TV says temp peak for next five days is triple digits on Friday, and rasp shows strong "convergence line " on Friday rasp.
    FYI, the overnight temp differential on Friday is about the magic 40 degree mark. The D. Armstrong benchmark for a good day.
    Peter Kelly

  3. #3
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    Re: VSA Race Day # 6 - Saturday, July 8, 2017

    Friday morning up date:

    RASP for today is now available - the shortest range fcst we will have for today. Yes it is HOT! but tomorrow is hot also, but just not quite as hot. Today will warm the lower atmosphere making tomorrow less convective. I've reviewed today's RASP charts and have decided to fly today (Friday) and not fly tomorrow. 1. Flying in such heat is exhausting, and 2. difficult for me to do two days in a row.

    I have 9 images that I will review again before takeoff, just to have my proposed flight track clearly imprinted in my mind.

    I will go to Tree Farm, or nearly so, climb to cruising altitude, and then go to T-16 and back to Walker and then home. That's the plan.
    Here are the images.... and the proposed track...

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    Peter Kelly

  4. #4
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    Re: VSA Race Day # 6 - Saturday, July 8, 2017

    continued...
    remainder of images , along with the route planned for today. Short flight.less than three hours. St John , T-16, Walker, land at WSC.

    Later edited, since these images did not load and display properly.
    Image place markers were deleted.
    Last edited by Peter Kelly; 07-07-2017 at 08:04 PM.
    Peter Kelly

  5. #5
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    Re: VSA Race Day # 6 - Saturday, July 8, 2017

    That convergence line looks a lot like wave to me. Look at the black butte sounding. The wind really picks up at the top of the BL. Which isn't too high -- 8,000 feet. Get to the top of the thermal, patiently, then nose up wind. It's a bit too S to be a big wave day, and doesn't go up that high. But getting up in it is always fun.
    John Cochrane

  6. #6
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    Re: VSA Race Day # 6 - Saturday, July 8, 2017

    I had a plan, but decided to call this an orientation flight for my co-pilot Doug Taylor.
    We had an excellent flight.
    I demo'd how to get low and then climb back up around St John... I did this a couple of times.
    I'm really getting good at it.
    We meandered to the north over the Alder springs, Doug climbed us up to 11,000 ft, and now it was time to go home. We had a firm scheduled landing time of NLT 4 PM.

    There was lift all along the line north south over Montgomery.
    We set flaps 1, Doug maintained 90 kts all the way back to the 5 mile circle of WSC.

    I then flew over head and circled down n full drag config at 55 kts
    Details to follow

    A marvelous day.

    Track with Altitude Legend
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    Track with Airspeed legend

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    Flight posted to OLC...

    https://www.onlinecontest.org/olc-2....htId=540388055
    Last edited by Peter Kelly; 07-07-2017 at 08:22 PM.
    Peter Kelly

  7. #7
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    Re: VSA Race Day # 6 - Saturday, July 8, 2017

    Quote Originally Posted by John Cochrane View Post
    That convergence line looks a lot like wave to me. Look at the black butte sounding. The wind really picks up at the top of the BL. Which isn't too high -- 8,000 feet. Get to the top of the thermal, patiently, then nose up wind. It's a bit too S to be a big wave day, and doesn't go up that high. But getting up in it is always fun.
    John Cochrane
    Now you tell me...Unfortunately, I did not read this post of your's John until after landing.
    I sure wish I had reevaluated my plan and my reading of the RASP charts.

    Now that I think back on each bit of lift and sink, look at my trace, and recall my conversations in flight, there is no doubt that was wave.

    Granted it was weird wave, but definitely wave. No heavy sink either side of the lift. I was more directing than flying, and just wasn't focused. I would like to think that if I had been solo, it would have dawned on me what was going on.
    Or better yet, prepared better for the flight.
    If I had taken a few minutes to discuss the RASP charts prior to launch, that too would have prompted that realization. Inadequate pre-flight on my part for this mission. - but I had to be at DMV at 9 AM. It took nearly 10 days to get that appointment, and i didn't want to miss it. Family members were heading out the door in another direction while i was leaving home for the gliderport.
    My bad. If you're gonna fly, then prepare properly. Lesson here is: proper planning prevents p* poor performance (the 6 p's). The more I analyze this flight the more I see I missed out on a great opportunity to cruise along the top of the wave line.

    Lucky for us, we have meteorological evidence, as well as flight records and post mission data. I can analyze the h* out of this.

    The sounding forecast wind at nearby black butte TP at 3 pm local, A steady 10 kts out of the west. I can attest that was the actual wind as well. That was a good forecast.

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    The vert velocity, wind and location of the wind parallel at 5000 ft and at 10,000 ft for 3 pm local. As it turned out, we were nearly directly on this line white dashed line, at this exact time...

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    The wind parallel - same time.... yup. that red are is the center of the good lift. It was right on the east edge of the hills, overlooking Diamond M...

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    and finally the flight log -
    First the actual track with the wind parallel line on it..

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    .... and then the zoom in, showing altitude on one and vertical velocity on the other. We were climbing through 10,000 feet at 3:15 PM - the same time as these RASP forecasts are predicting. The white line is the location of the Wind-parallel section. Note the fine circles being flown by Doug, but of course we could have been flying 'S' turns and climbed faster, I suspect. It was only his second flight, and I just told him to circle in the lift, so it's all my fault.

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    Pretty remarkable to have this kind of validation of the conditions.
    Last edited by Peter Kelly; 07-08-2017 at 10:21 AM.
    Peter Kelly

  8. #8
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    Re: VSA Race Day # 6 - Saturday, July 8, 2017

    What attracted my eye was the strong increase in wind starting 8000' shown in the sounding. But hey, you got it! If you were at 10,000' in that sounding, you were in wave. You can never prepare enough and the weather often changes. The right lesson is the Pete Alexander mantra: eyes wide open. If thermal lift starts to get real smooth, try opening up upwind and staying where the GPS says the lift is good. It's ok to circle in wave! Sometimes it's shear wave not mountain wave and will move downwind too.

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