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Author Topic: Skywriter 2014 Build Class  (Read 28176 times)

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Offline Papa

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Re: Skywriter 2014 Build Class
« Reply #45 on: March 15, 2014, 10:18:05 PM »
Looking good Kevin. Nice straight and clean work.

Jack.
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Offline Papa

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Re: Skywriter 2014 Build Class
« Reply #46 on: March 17, 2014, 10:44:26 PM »
I mentioned I was going to build the lower wing as one wing and cut it later to build in the dihedral. To make this easy I wanted to have a complete plan. I started with the printed plan on one side of my board and added some blank paper for the second half of the wing. I used Banner Paper from Staples.

I measured the distance from the centre line to the outside of the wing tip rib and transfered it to my blank paper. I then extended all the spar lines etc.

I got a piece of card stock, lined it up with the centre line and marked the location of all the ribs. I flipped it and starting at the centre marked all the rib locations at the LE and then at the TE on my plan. I then connected the dots and I had all the major locations I need to build a single piece wing.

Jack.
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Offline bfeist

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Re: Skywriter 2014 Build Class
« Reply #47 on: March 18, 2014, 12:55:34 PM »
Very helpful, Jack. Thanks for posting that, I was wondering how I was going to manage that.

Offline bfeist

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Re: Skywriter 2014 Build Class
« Reply #48 on: March 19, 2014, 05:56:21 PM »
I'm finally making a start and have already run into a problem. I guess this comes down to just how much I should be trusting the CNC cuts. Are these just rough shapes? The balsa laser-cut rudder is the wrong shape. The cut parts cover the vertical 1/2" x 1/4" structural piece in the plan. This doesn't seem to have tripped anyone else up. Am I being overly sensitive? I'll just get the saw out and get on with it.


Ben

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Re: Skywriter 2014 Build Class
« Reply #49 on: March 19, 2014, 06:27:37 PM »
That's not a 1/2" x 1/4" piece. It's two 1/2" x 3/32" one on either side of the rudder. They help to lock the rudder pieces together.

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Offline bfeist

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Re: Skywriter 2014 Build Class
« Reply #50 on: March 19, 2014, 06:30:57 PM »
That's not a 1/2" x 1/4" piece. It's two 1/2" x 3/32" one on either side of the rudder. They help to lock the rudder pieces together.

Jack.


Well that explains it. How should I be reading these plans in order to know that?

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Re: Skywriter 2014 Build Class
« Reply #51 on: March 20, 2014, 01:14:35 PM »

Quote
Well that explains it. How should I be reading these plans in order to know that?

Hi Ben Sorry to take so long to respond. I have attached a PDF that shows where the information was but it is not very clear and you have to work out things for yourself. It requires a lot of "imagineering" and building in your mind.

Jack.
« Last Edit: March 20, 2014, 02:52:23 PM by bfeist »
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Offline bfeist

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Re: Skywriter 2014 Build Class
« Reply #52 on: March 20, 2014, 02:53:48 PM »

Quote
Well that explains it. How should I be reading these plans in order to know that?

Hi Ben Sorry to take so long to respond. I have attached a PDF that shows where the information was but it is not very clear and you have to work out things for yourself. It requires a lot of "imagineering" and building in your mind.

Jack.


Thanks Jack. Wow! Somehow I had convinced myself that that was a picture of the stab in position. But of course it isn't. I guess it's pretty clear I didn't attend engineering school.


Ben

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Re: Skywriter 2014 Build Class
« Reply #53 on: March 20, 2014, 04:46:00 PM »
Neither did I so we're both in the same boat. many of these plans are designed for "experienced builders" but it's a catch-22. How do you become experienced? You just have to bash on. I find that reading the blog and the 8 page magazine article with the plan in front of me helps me visualize my next steps. Then I visualize building that piece and see if I encounter any problems and make sure I have all the tools I need.

Jack.


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Offline sihinch

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Re: Skywriter 2014 Build Class
« Reply #54 on: March 20, 2014, 09:22:37 PM »
I've been finding that the best way for me to visualize the errors I am making is to start building and then realize you've gone wrong! It's great for teaching you how to correct things and overcome mistakes!

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Re: Skywriter 2014 Build Class
« Reply #55 on: March 25, 2014, 09:20:07 PM »
Looking for a piece of hardwood approx 2x1x3 inches so I can fabricate one of Jack's "groovy" sanding blocks with a groove 1/4-9/32" across. Please LMK if you have something.
DOWN WITH GRAVITY! UP WITH LEVITY!

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Re: Skywriter 2014 Build Class
« Reply #56 on: March 26, 2014, 05:14:12 PM »
See you tonight
DOWN WITH GRAVITY! UP WITH LEVITY!

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Re: Skywriter 2014 Build Class
« Reply #57 on: March 26, 2014, 10:22:34 PM »
Another awesome class tonight! Thanks so much Jack and Frank.

And also thanks to Ben for the build manual/memento!

I find the sessions so interesting and informative but most importantly this building lark is so much fun!

I will post notes and photos tomorrow (hopefully).

I can't wait until next week!

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Re: Skywriter 2014 Build Class
« Reply #58 on: March 27, 2014, 08:41:13 AM »
So here are the notes from last night;

Recommend HS65 or similar for aileron servos.
Suggest add an extra rib at the middle of each wing, where they join.
Frank used 5/16 for trailing edge and 1/2 x 1/4 for leading edge.
Don't forget to add the 1/4 x 1/4 second spar under the ribs before you build - but line ribs up to main spar and TE.
L shaped aluminium 3/4 x 1/2 from Lowes for strut attach point.
If wood is bowed make sure you oppose the bow with the symmetrical piece - to form either concave or convex structure. Never parallel.
You can lick bowed wood - see picture of Frank!
Wing tips should be on center line of last rib, not flat bottomed.

Hope this helps and jogs memories!

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Re: Skywriter 2014 Build Class
« Reply #59 on: March 27, 2014, 08:49:03 AM »
Very good.


I added two ribs in the centre from soft 1/8" balsa.
Don't forget to add openings for the servo leads!


Jack
A motto to live by:
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