# Search Results

1. Post

### Calculation critical buckling stress for alu D tube skin, help needed

Explained in post 16. See also method in Bruhn section C.9 for buckling of curved panels.
Post by: Matt G., Mar 10, 2017 in forum: Aircraft Design / Aerodynamics / New Technology
2. Post

### Calculation critical buckling stress for alu D tube skin, help needed

Using the smallest radius is unconservative. Using the largest radius would be conservative.
Post by: Matt G., Mar 10, 2017 in forum: Aircraft Design / Aerodynamics / New Technology
3. Post

### Calculation critical buckling stress for alu D tube skin, help needed

If there was a method for this in Timoshenko, this conversation would be irrelevant. Extrapolation is poor engineering practice. If a full size...
Post by: Matt G., Mar 10, 2017 in forum: Aircraft Design / Aerodynamics / New Technology
4. Post

### Calculation critical buckling stress for alu D tube skin, help needed

Extrapolation is a big no-no. And then if you only have one data point, how would you extrapolate that? To make it from another material, E and...
Post by: Matt G., Mar 10, 2017 in forum: Aircraft Design / Aerodynamics / New Technology
5. Post

### Calculation critical buckling stress for alu D tube skin, help needed

Engineering judgement and conservative assumptions.
6. Post

### Greetings from an aspiring designer!

Tell that to all of the people that spun in unflapped gliders.
Post by: Matt G., Feb 24, 2017 in forum: New Member Introductions
7. Post

### Does un-varnished plywood weaken with long storage ?

No qualms about flying my 51-year old wooden glider. There are certainly older airframes than it still flying, too.
Post by: Matt G., Feb 21, 2017 in forum: Wood Construction
8. Post

### Wiring Required For 20 Watt LED Landing Light?

They're both trying to cover themselves, or don't know what they're talking about.
Post by: Matt G., Feb 17, 2017 in forum: General Experimental Aviation Questions
9. Post

### Using softer solid rivets

double post
Post by: Matt G., Feb 16, 2017 in forum: Sheet Metal
10. Post

### Using softer solid rivets

What would you use for joint allowables for those 6053 rivets?
Post by: Matt G., Feb 15, 2017 in forum: Sheet Metal
11. Post

### Using softer solid rivets

Before this, I've never seen anyone call a 2117 rivet "hard".
Post by: Matt G., Feb 15, 2017 in forum: Sheet Metal
12. Post

### Running 100LL in your 2 Stroke Full Time?

Compression RATIO...is a RATIO. It is unitless, so their use of the metric system is completely irrelevant.
Post by: Matt G., Feb 15, 2017 in forum: 2-Stroke Aircaft Engines