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aaron_sK Member
Joined: 23 Jan 2006 Posts: 8834 Location: Back in beautiful Tacompton
1987 Chevrolet Camaro IROC-Z
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Posted: Thu Apr 04, 2013 8:20 am Post subject: |
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Mmm... Hemlock...
I understand why Hem gets used over Doug fir or whatever, it always comes down to price. In your application the added weight of the fir would be a consideration as well.
A lot of the hemlock that is grown is destined for, shall we say "entry level" uses like cheap trim (that needs to not be MDF) and interior wall studs for cheap tract housing. That means it is grown fast (wide rings, very soft, blows out when you nail it).
Like anything it's all in what the yard has and how good you are at picking it. I know that it is getting very hard to get any kind of decent wood out of lumber yards. Trees have been bred to grow so fast for so long now that they are getting very weak, and the mills are willing to put out some real crappy stuff. You need to be especially careful due to the small dimensions of your build. If you are buying 1x1 material you are at a little over a half square inch on your cross section. If you buy wood that has been grown fast you may only have a couple rings per stick, and a little whoop in the grain or a small knot that wouldn't make a difference in a larger piece of wood, will make your piece unusable.
I wasn't dumping on your engineering or technical ability. I still think this is a crazy idea, but I've had a few of those myself, and I have faith that you will see it through, Jim. As you said, you haven't been exploded yet. |
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chevymad Master B
Joined: 11 Jan 2004 Posts: 5474
1987 Pontiac Formula
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Posted: Thu Apr 04, 2013 11:35 am Post subject: |
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You did see there are rules for minimum rings per inch and ring parallelism didn't you Aaron? |
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aaron_sK Member
Joined: 23 Jan 2006 Posts: 8834 Location: Back in beautiful Tacompton
1987 Chevrolet Camaro IROC-Z
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Posted: Thu Apr 04, 2013 11:44 am Post subject: |
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Yes, for production planes using FAA-approved lumber.
Jim's project would fall under "experimental" if I have read the page correctly, and I would bet that his lumber came from Bud's in South Bend or one of the yards in Aberdeen. |
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flea Member
Joined: 25 Jul 2008 Posts: 1246 Location: Raymond WA
1991 Chevrolet Camaro RS
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Posted: Thu Apr 04, 2013 2:54 pm Post subject: |
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You would be right Aaron, but the criteria is still the same for me for obvious reasons.
The grain is running straight, with between 8 and 10 per inch.
But either way 3.00 per foot plus about a buck a foot shipping makes selective shopping worth while. _________________ Killing mailboxes since 2009 |
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aaron_sK Member
Joined: 23 Jan 2006 Posts: 8834 Location: Back in beautiful Tacompton
1987 Chevrolet Camaro IROC-Z
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Posted: Thu Apr 04, 2013 4:59 pm Post subject: |
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flea wrote: | 3.00 per foot plus about a buck a foot shipping makes selective shopping worth while. |
Absolutely agreed, Jim. |
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jchaussee Member
Joined: 14 Nov 2010 Posts: 1318 Location: renton
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Posted: Thu Apr 04, 2013 7:09 pm Post subject: |
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Ya lumber is crap now days. What is now number 2 grade used to be what we used as utility. I only get select if hem/fir or i get douglas fir. |
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Al Hasse Member
Joined: 19 Nov 2005 Posts: 4379 Location: Bremerton, WA
1992 Chevrolet Camaro RS
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Posted: Mon Apr 08, 2013 3:55 pm Post subject: |
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My cousin in Michigan has a plane project going also. A 1947 Piper J-3 Cub. From his post on Facebook, he's just finishing up with part of the tail section, "recovering the tail feathers" he says. _________________ 92 Camaro
89 Camaro
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flea Member
Joined: 25 Jul 2008 Posts: 1246 Location: Raymond WA
1991 Chevrolet Camaro RS
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Posted: Mon Apr 08, 2013 5:23 pm Post subject: |
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I'd love a cub, but they really are too expensive. Last I checked on them they were north of 40k for a good low hour plane. Too much for what you get...but still it is a cub. _________________ Killing mailboxes since 2009 |
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Al Hasse Member
Joined: 19 Nov 2005 Posts: 4379 Location: Bremerton, WA
1992 Chevrolet Camaro RS
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Posted: Mon Apr 08, 2013 5:56 pm Post subject: |
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From the looks of it, he's building from scratch, too. From his Facebook post...
Quote: | The first part of the puzzle. Started recovering the tail feathers |
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flea Member
Joined: 25 Jul 2008 Posts: 1246 Location: Raymond WA
1991 Chevrolet Camaro RS
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