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Eindecker EIII

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Old 12-24-2012, 11:15 AM
  #76
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Default RE: Eindecker EIII

Quote:
ORIGINAL: R/C Art

Progress report:

Pretty much everything is on the wing that can be at this point........here's a picture.

Here's a question for all you cerebral types........ ''Have you ever glued two parts together and wondered why they're not joining together tightly? Even after you have dry fitted it a couple of times and it was snug as could be.........''

I'm just asking.......
Seriously, the glue has to have a place to go. One of the nice things about thin CA. If you have tight joints, it wicks in and makes a strong bond. Fillets can be added later for more strength. Then, while you have your good fit. You can add the glue then.
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Old 12-24-2012, 11:47 AM
  #77
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Default RE: Eindecker EIII

Some shots of the fuselage design for inquiring minds.
Next step is locating servos and mounts for rudder. elevators and control cables.

I plan on cutting fuselage parts later this week.

Shown with a DLE60, ..........and yes a DA170 will fit

Larry
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Old 12-24-2012, 11:53 AM
  #78
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Default RE: Eindecker EIII

Quote:
ORIGINAL: CubCrafter

Some shots of the fuselage design for inquiring minds.
Next step is locating servos and mounts for rudder. elevators and control cables.

I plan on cutting fuselage parts later this week.

Shown with a DLE60, .......... and yes a DA170 will fit

Larry


Now your talking

HPA
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Old 12-24-2012, 12:40 PM
  #79
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Default RE: Eindecker EIII


Quote:
ORIGINAL: R/C Art

Progress report:

Pretty much everything is on the wing that can be at this point........here's a picture.

Here's a question for all you cerebral types........ ''Have you ever glued two parts together and wondered why they're not joining together tightly? Even after you have dry fitted it a couple of times and it was snug as could be.........''

I'm just asking.......
Yes I have wondered about that. Don't know the answer but I'd guess one of two things: wood absorbs the glue from the joint or the combination of pressure and temperature isn't right to kick off the curing reaction.

Greg
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Old 12-24-2012, 02:25 PM
  #80
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ORIGINAL: Horsepoweraviation

Hey Art.....ART! wake up!

How many ''steps'' do you have jotted down now ........ and when is the est. time of arrival for the fuse parts?

(i told you about that guy...Jim .....he is sensitive!)

Any who......keep up the good work and we will see you soon enough..........I have to go now....I have to post some pics for this guy named... DOC?


HPA
okokokok I'm awake now! I think I have all the steps jotted down - except for the ones which didn't pan out[&:], or the ones which I forgot to do[:@] or did out of order......and then there are the ones[X(][X(][X(]....oh, never mind. It almost feels like I,m back in school and this is a homework assignment[:'(]
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Old 12-24-2012, 02:28 PM
  #81
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Quote:
ORIGINAL: Eindecker_pilot


Quote:
ORIGINAL: R/C Art

Progress report:

Pretty much everything is on the wing that can be at this point........here's a picture.

Here's a question for all you cerebral types........ ''Have you ever glued two parts together and wondered why they're not joining together tightly? Even after you have dry fitted it a couple of times and it was snug as could be.........''

I'm just asking.......


Yes I have wondered about that. Don't know the answer but I'd guess one of two things: wood absorbs the glue from the joint or the combination of pressure and temperature isn't right to kick off the curing reaction.

Greg
Greg, your homework assignment is to go back and take a closer look at the series of pictures which generated the question in the first place. ok?
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Old 12-24-2012, 02:46 PM
  #82
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Default RE: Eindecker EIII

Hi Rich,

Good hearing from you. Glad to have you aboard. Merry Christmas right back at ya!

I don't know about the Eurika Springs trip - the Mint Julep date has been changed to that same weekend.

Tell Dallas hey for us.

Art
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Old 12-24-2012, 02:50 PM
  #83
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Quote:
ORIGINAL: vertical grimmace

Quote:
ORIGINAL: R/C Art

Progress report:

Pretty much everything is on the wing that can be at this point........here's a picture.

Here's a question for all you cerebral types........ ''Have you ever glued two parts together and wondered why they're not joining together tightly? Even after you have dry fitted it a couple of times and it was snug as could be.........''

I'm just asking.......
Seriously, the glue has to have a place to go. One of the nice things about thin CA. If you have tight joints, it wicks in and makes a strong bond. Fillets can be added later for more strength. Then, while you have your good fit. You can add the glue then.
I hear ya, and what you say pretty much makes sense. BUT, (and there's always a but) - But, if you look closer at the last 3 photos you might notice that I tried to glue a T-pin in between the two pieces of wood I was supposed to be glueing together.

OK, Moving on!
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Old 12-24-2012, 02:53 PM
  #84
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Quote:
ORIGINAL: CubCrafter

Some shots of the fuselage design for inquiring minds.
Next step is locating servos and mounts for rudder. elevators and control cables.

I plan on cutting fuselage parts later this week.

Shown with a DLE60, ..........and yes a DA170 will fit

Larry
Good looking stuff there, Larry........does a pilot's chair come with the kit? (I see it in the fuselage shots)
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Old 12-24-2012, 08:07 PM
  #85
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Wonderful work so far Sir Art. Hope you and Mrs Art have a Merry Christmas
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Old 12-25-2012, 06:56 AM
  #86
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Merry Christmas Art and Rhonda!

Cheers,
Paul & Michelle
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Old 12-25-2012, 08:01 PM
  #87
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Paul & Michelle

Thanks and Merry Christmas to you two, too. (I've always wanted to use all those 2's really close together in a sentence)

Art & Rhonda



I have made a little progress this Christmas Day.
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Old 12-25-2012, 08:32 PM
  #88
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Default RE: Eindecker EIII

Very precise-looking construction! One thing I'm wondering about though is the idea of having lightening hole on the sheer webs. Doesn't that sort of defeat the purpose of them? But then maybe not. Maybe what's still there does the job.
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Old 12-25-2012, 08:47 PM
  #89
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Hey Art,

I'm signed on here, I've been enjoying your progress from the comfort of my couch. Only reason I didn't chime in earlier was because it hinders my build that patiently awaits me in my shop. (The couch...that is... hinders me the most Larry surely has an outstanding design there, reminds me of building a plastic snap-tite model when I was a kid. Are you sure your actually gluing it?? Parts look likey the fit nice and tight. Looking forward to more progress.. albeit slow..like me

Merry Christmas to you and Rhonda.

Mike & Cindy
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Old 12-25-2012, 09:46 PM
  #90
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Hi Mike

Welcome aboard. Hope this Christmas Season has been good to you.

Glueing? Yeah, I think so.......let me check[:-] Yep, lots of quicky sticky!

Art
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Old 12-26-2012, 09:14 AM
  #91
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Quote:
ORIGINAL: abufletcher

Very precise-looking construction! One thing I'm wondering about though is the idea of having lightening hole on the sheer webs. Doesn't that sort of defeat the purpose of them? But then maybe not. Maybe what's still there does the job.

It would interesting to test this and find out if there is a difference. I've always used shear webs, but have never put lightening holes in them.

Interesting thread and fun to watch the construction of this model. I love the precision fit of the parts.
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Old 12-26-2012, 09:14 AM
  #92
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Hi Art,

Nice work on the eindecker. Looks like great design work. And Merry Christmas to you and Rhonda.

So when is the Mint this year? Ihad a look at the sircm site and couldnt find the date. Sorry for the off topic post.

Dave Semeraro
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Old 12-26-2012, 09:45 AM
  #93
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Default RE: Eindecker EIII

To answer the question about the shear webs.

The material that I have used is 1/8" Baltic Birch Ply.
To save weight I have added the lightning holes. If I was using balsa and needing to depend on the grain in the wood I would not use lighting holes.

The front webs are between the spars and in essence creates a beam structure. This is not unlike a beam used in building construction. The half ribs are actually notched into the webs.
The rear webs are on both sides if the spars and creates a box beam. Most of the hole area is in the open space between the spars and there is still quite a bit of surface gluing area.

The use of this material is also substantially less expensive than using balsa and I believe stronger in the end.

Larry
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Old 12-26-2012, 09:52 AM
  #94
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Default RE: Eindecker EIII

Since the webs are made of ply there's really no doubt about the strength. Thanks for clearing that up. (Is ply really cheaper than balsa?)
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Old 12-26-2012, 10:31 AM
  #95
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Since I am looking at this as a kit to sell I have been looking hard at all material costs.
My laser has a 12"x24" bed size so I am limited to the 24" length.

I get the 1/8" Baltic Birch from a local woodworker supply store in a 5'x5' sheet.
They cut it down to 12"x24" at no charge so a 12"x24" piece costs me $1.60 total.

A 4"x24" of 1/8" balsa sheet costs $1.57 plus shipping from National Balsa
$1.57 x 3 = $4.71 plus shipping for that same 12"x24" area. []

The wings and tail group alone take 20 12"x24" pieces.

I think that this material really only works in aircraft kits of 1/3 scale and larger due to the weight but I am reducing that weight gain by
being able to have so many lightning holes, due to the stronger material.

And it is easy to cut lightning holes with the laser. Think of all of the dies it would take to do the same.

Larry
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Old 12-26-2012, 01:54 PM
  #96
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Hi Dave

Thanks and Merry Christmas to you and yours. The Mint Julep is the second weekend in June. As I understand it, this will be date for the forseeable future.

Cheers.
Art
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Old 12-26-2012, 04:17 PM
  #97
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What is your hoped for or target price for the kit and what will that include?

Whit
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Old 12-30-2012, 05:29 PM
  #98
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ORIGINAL: wphilb

What is your hoped for or target price for the kit and what will that include?

Whit
Whit, refer to post #14.
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Old 12-30-2012, 07:30 PM
  #99
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Thought that I would post an update.

While Art has been building the production prototype I have been trying to stay one step ahead of him building the developmental prototype.

I got the parts cut for the fuselage and have been able to frame up both sides. Still need to put in the cross pieces and some other parts but you can see
how things are starting to shape up. The length is about 84" and the out to out is 9". The firewall is 14" in diameter.
I will be sending Art all of these parts by the end of the week since I am sure everything is going together as intended.

I also made a decision on the cowl front to back dimension of 7 1/2".
This is about 2" bigger than scale but you can see in the photo below the G62 engine and muffler setup I am going to use on mine will fit in the 7 1/2".
It will be easy enough to cut the back side of the cowl off for other engine setups that are not as deep.

The cowl will also have a cowl ring that will actually set on the fuselage sides that protrude thru the firewall.
It is the red shape in the photo.

The elevator servos will be mounted on the sidewall behind the pilot's seat. The center-line of the servo is the center-line of the
stab so the pull-pull will be a straight shot. The rudder servo on rails in the middle.
The drawings show only a one-sided servo arm but they will be full size.

Larry

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Old 12-30-2012, 08:22 PM
  #100
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Default RE: Eindecker EIII

.....and while I'm waiting on my fuselage parts I have been putzing around with the capstrips.

I am using a combination of carpenters glue and thick CA. On the straight runs wood glue and various clamps are used and then at the front of the rib, CA and kicker to hold the curve. And a soaking in a glass of water for the cap strips to help them bend.
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