Tuesday, June 26, 2018

Wright Brothers

First Powered Flight

During a recent beach vacation on North Carolina's Outer Banks we visited the Wright Brothers National Memorial in Kitty Hawk. At this spot, on December 17, 1903, the first powered flight took place. A stone marker, dedicated in 1928, now stands at the launch point. A replica of the launching rail leads to the spot where the airplane lifted off as you can see in the picture below.
The following sign explains the role of the launching rail. (Click on the image to more easily read the text.)
Amelia Earhart was present along with Orville at the 1928 dedication.
The first three flights were only short hops before a much longer fourth flight took place as explained by this nearby sign. (Click on the image for a better view.)
The endpoints all four flights are marked with stones. We were too lazy to walk all the way to the fourth stone in the heat.
The present day memorial has recreated the crude 1903 buildings used by the Wright brothers. One is a hanger, and the other served as a workshop and living quarters.
South of the first flight stone marker is a larger monument erected on Kill Devil Hill. The park ranger explained how the present hill is roughly 200 yards or so from where it was located when the Wrights used it for glider experiments. The hill and surrounding ground were all bare sand in 1903, and the huge hill/sand dune migrated to its present position due to the natural action of winds. Vegetation was added to halt further migration, and you can see grass now covering the original sandy field.
On the south side of Kill Devil Hill sculptor Stephen Smith created a magnificent life size reproduction of the moment the first flight took off. It was hard to get pictures without other visitors in the photos. Next is a panorama showing the entire sculpture. (Click on the image for a larger view.)
The next two pictures show members of the Kill Devil Hills Life-Saving Station who helped the Wright Brothers move the plane and then witnessed the first flight. One of them, John Daniels, took the famous historical first flight photo.
The Wright brothers had flipped a coin to decide who would pilot the first flight. They took alternating turns thereafter. Wilbur made an unsuccessful try on December 14th, therefore, it was Orville's turn to try three days later on December 17th. The sculpture shows Wilbur running alongside as the plane lifts off under his brother's control.
Here's the plane with Orville at the controls next to the motor.
It's hard to believe this contraption actually flew!

I loved this sculpture! It was the best part of the Wright Brothers National Monument.    

Friday, June 1, 2018

Few Solar Features

Approaching Solar Minimum

My solar telescope has been idle for eight months. During this time good observing conditions did not coincide with the presence of significant solar features. The Sun's roughly eleven year sunspot cycle is probably within a year of reaching minimum activity, so sunspots are rare these days.
Sunspots and large filaments have been mostly absent from the solar disc for many months. What a change from three years ago! In 2015 there wasn't a single day without sunspots. By 2017 there were 104 spotless days, about 28 percent of the time. So far this year the sun has been spotless 54 percent of the time. Any recent sunspots have usually been small and short-lived.

On May 24th a week of rain and clouds finally ended leaving lower humidity and a clear blue sky over my red dot location in eastern Virginia as you can see in the following satellite image taken that day.
Although few solar features were present, I decided to do some imaging anyway. Gentle puffs of breeze blew from time to time. The temperature ranged from a tolerable 75 to 78 degrees. Observing conditions would have been nearly perfect except for neighborhood noise. String trimmers and lawn mowers roared next door while a screeching rock saw cut patio stones for another neighbor. Occasional dust clouds from stone cutting blew towards my yard.

A bit out of practice with the solar observing routine, I took my time and consulted notes. Eventually, I captured some decent images. The first picture below is a 15-panel mosaic showing modest features on the eastern half of the Sun. Active area 2712 had just rotated into view near the limb. Active area 2710 is to the right of 2712. A number of prominences are visible around the limb. (Click on the image to see better detail.)
Aside from two small active areas seen above, the remaining eastern solar surface is relatively featureless. The next picture is a two-panel mosaic showing a closer view of the two active areas. During the time of image capture area 2712 on the left had emitted a small jet of gas toward the limb.
Area 2710 showed only the characteristic white color of increased energy emission but no sunspot umbra.
The Sun's west side contained only one obvious sunspot umbra contained within active area 2711 seen below.
I used longer exposure times to capture relatively dim prominences along the eastern limb. The brighter disc was, consequently, overexposed. I've blacked out the disc in the next 7-panel mosaic so only limb features are visible. Unfortunately, software used to combine separate images into a mosaic slightly distorted the limb from its true circular shape. The distortion isn't drastic, but it's definitely noticeable in the image below. (Click on the image for better detail and less apparent distortion.)
Longer exposure times did reveal more prominence features than those visible in the first mosaic image above.

As the solar activity cycle grinds through its minimum over the next year or so I'll have to patiently wait for good opportunities to observe. 

People say I'm crazy doing what I'm doing
Well they give me all kinds of warnings to save me from ruin
When I say that I'm o.k. well they look at me kind of strange
Surely you're not happy now you no longer play the game

People say I'm lazy dreaming my life away
Well they give me all kinds of advice designed to enlighten me
When I tell them that I'm doing fine watching shadows on the wall
Don't you miss the big time boy you're no longer on the ball

I'm just sitting here watching the wheels go round and round
I really love to watch them roll
No longer riding on the merry-go-round
I just had to let it go

John Lennon