Friday, December 13, 2013

Capturing some Measurements of the Leading Edge ribs, and dealing with yet another trategy a little too close to home

Today I got to experience the shock and terror that a parent goes through when you hear that there is a school shooting in progress, and that your child is currently on lockdown. Thankfully my son was not at the same high school where this trategy unfolded, and we got him home safe and sound, but we all know several families with kids that do attend that school, and my heart goes out to each and every one of them.

This year just really needs to end soon - I don't know how else to put it - there has just been too much shit this year. I have never been very superstitious, but I am coming to believe more and more that the number 13 is nothing but pure bad luck, and perhaps it even holds a bit of an evil stigma with it as well.

Please pray for the 15 year old girl that is still clinging to life in critical condition tonight in a local hospital. That's about all I am going to say about this.

Since building the plane definitely serves as therapy for me in a number of different ways, I decided to try to focus my attention on getting some measurements for the leading edge ribs for the mod. So I took a W408-1 L rib and a flexible sewing ruler and recorded the followingmeasurements:

The reference point at the front of the rib for all flange length measurements is the separation point between the upward and downward facing flanges. That is the starting point for all of the flange-length measurements that I took:

Upper flange length (front to back full length): 18.5 inches
Lower full length flange: 17.75 inches
Reference line for nose rib separation: just aft of the vertical portion of the "T" web stiffener in front of the first lightening hole

Upper Flange length from nose to reference line: 4 1/8 inches
Lower flange length from nose to reference line: 3 5/8 inches
Straight line measurement from the nose reference point to the edge of the vertical stiffener:
2 13/16 inches

Distance between the vertical stiffener and the stiffener forthe first lightening hole (at closest point): 3/4 of an inch

Straight line measurement from nose reference point to the rear of the stiffener for the first lightening hole: 7 3/4 inches

Straight line measurement from nose reference point to forward line of the rear vertical stiffener: 8 22/32 inches

Upper flange measurement to the forward line of the rear vertical stiffener: 10.25 inches
Lower flange measurement to the forward line of the rear vertical stiffener: 9.5 inches

Minimum distance between the rear edge of the first lightening hole stiffener to the forward edge of therear vertical stiffener: 3/4 of an inch

These are the measurements I need to deal with when figuring out where to cut the separation line for the modular leading edge section.


More later...


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