# Book recommendations? Structural design?

Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by Hephaestus, Sep 29, 2019.

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1. Sep 30, 2019

### Winginitt

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Ever thought about attending one of the EAA workshops on composites ? Might get some good contacts there that can answer questions for you later in addition to some first hand training.

2. Sep 30, 2019

### Hephaestus

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Yeah I found a few of these yesterday. I'm going to wade through them one at a time.

Didn't realize how useful masters thesis's can be. Have 3 I found yesterday that appear to walk through the full design and load calculations of UAVs with xps foam cores and composite over.

One was the source of the Helius question as it was modeled there then the layup was calculated by hand to verify.

Yeah there's always the garbage in/out worry with FEA. But there's also the RAF ply schedules to reality check against (similar weight speed range and mission to the varieze) - there's some comfort to be had if it 'looks' right.

Done the basic eaa ones, need to get down to the southern us for the better ones hopefully the mooneys paperwork snafu is resolved this week after throwing a bunch more $at the problem and my travels for these events can resume. 3. Sep 30, 2019 ### plncraze ### plncraze #### Well-Known MemberHBA Supporter Joined: May 12, 2006 Messages: 1,600 Likes Received: 335 Pay attention to the types of foam that veteran designers of people carrying homebuilts use. The late Orion used to discuss some of these issues here. Nat Puffer of Cozy fame was an plastics engineer I believe so his material choices would be reliable 4. Sep 30, 2019 ### Hephaestus ### Hephaestus #### Well-Known Member Joined: Jun 25, 2014 Messages: 1,185 Likes Received: 258 Location: YMM Yeah, maybe that's one of my issues. Unfortunately just on the fuselage, there's a cost differential of about 2000$ just in core material to switch from XPS to a ⅜" PU core. And means building a mold then a part... I'd rather the rutan method myself, I have space, but it gets limited quick when it starts getting full of large molds.

5. Sep 30, 2019

### stanislavz

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Share it for open knowledge

6. Sep 30, 2019

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