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Bud Nosen Mr. mulligan

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Bud Nosen Mr. mulligan

Old 09-14-2014, 07:25 AM
  #201  
flyingagin
 
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Steve that is not overkill. One trick to save wight would be to radius in the side points to spread the stress over a greater area. Lightning holes can also be added to the plates. The plate must be strong enough to handle the loads it will cary but 1/4' ply is pretty strong. I think the main thing is to have it anchored well to adjoing structure. And that is done in wood by increasing the joint area. Also even if the joint is strong enough not to fail, you can still have a failure. The area the stress impacts must also be suffeceitnt to absorb the loads.
So spread it out baby, spread it out. From Ken engineering syllabus 101)

Look at how I tried to distribute the strut loads on a relatively weak wing structure on my CL RingMaster bi plane. Not quite what you need but the ideal is there.

Ken
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Old 09-14-2014, 07:35 AM
  #202  
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Good info Ken.thanks.
Old 09-14-2014, 08:14 AM
  #203  
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Hey Robert, don't feel bad. Your not the only one always doing re-do's. I just finished re-cutting the number 3 and 4 formers again.( for the third time.) some dummy drilled a bunch of lightning holes in them making them too weak for landing gear and strut attachment points. Hmm. Gotta teach that guy how to build.
Old 09-14-2014, 08:42 AM
  #204  
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Problem is, I know better, you did not. You do now, and hopefully I will remember!
Old 09-14-2014, 08:46 AM
  #205  
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Originally Posted by stevegauth30
Hey Robert, don't feel bad. Your not the only one always doing re-do's. I just finished re-cutting the number 3 and 4 formers again.( for the third time.) some dummy drilled a bunch of lightning holes in them making them too weak for landing gear and strut attachment points. Hmm. Gotta teach that guy how to build.
Steve, do you want me to come help you Jack Slap that dummy? Be glad to help out.

Ken
Old 09-14-2014, 11:14 AM
  #206  
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Sure Ken. C'mon over. Just tell the better half to leave the frying pan home. I already have a headache from mine. Lol. More progress;
this is what I've come up with for the LG and strut plate. I made a box structure between the two formers connecting them with a tab and notch arrangement. Now, it's basically one solid structure rather than two. Once I glue it up I'll also add the usual tri-stock and 45 angles in inside corners. Who knows? It may also serve well as a smoke tank box later on.well see.i feel it will be a whole lot stronger than buds way. He had nothing between the two formers and basically just glued the strut plate to the former. I don't think it added too much weight, but even if it did, I'm ok with it.
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Old 09-14-2014, 11:26 AM
  #207  
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That should work just fine.

Wife says only my name is that frying pan. I am not real sure that is a good thing.

Ken
Old 09-14-2014, 11:31 AM
  #208  
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Well, lucky you. Another mod I'll be making is a remove able hatch to access the landing gear bolts. Kind of sux to have to cut the belly of a plane apart if something goes bad. Learned that one the hard way.
Old 09-14-2014, 11:47 AM
  #209  
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Good choice Steve
If you can't access it readily, you are going to have to. If you can readily access it, you will never need to. Baffles me how that works. But that mabe from to many frying pan kabongs.

Ken
Old 09-14-2014, 03:58 PM
  #210  
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I spent Saturday beefing up the same area on my Vega.

On round engined designs, I don't worry too much about adding weight ahead of the CG.
Old 09-15-2014, 09:56 AM
  #211  
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OK since no one else asked, where do you find Aspen lumber?
Old 09-15-2014, 10:01 AM
  #212  
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Aspen Colorado


ken
Old 09-15-2014, 10:19 AM
  #213  
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Originally Posted by flyingagin
aspen colorado


ken
Duh! From an Aspen tree. Hello!
Old 09-15-2014, 10:52 AM
  #214  
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A google search shows Menards carries it. No show for home depot Unsure about lowes.

If you have a place that sells hardwood for cabinet industry they most likely will have it and probably spruce too.

Kevin
Old 09-15-2014, 11:12 AM
  #215  
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Originally Posted by Cub Flyer Fresno
Duh! From an Aspen tree. Hello!
Had my wife howling with laughter on that one. Good one.

Ken
Old 09-15-2014, 11:30 AM
  #216  
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Thank you Captain Obvious!
Old 09-15-2014, 11:31 AM
  #217  
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Actually, HD and Lowes carry it. At Lowes, it's usually in the lumber aisle with the trim and stuff. There's usually little cubbies down low. They have poplar, aspen, and a few others. Comes in widths from maybe 1 inch up to 6 inch I think and mostly in 1/4 thickness.
Old 09-15-2014, 12:17 PM
  #218  
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I have seen Oak, Popular, and clear Pine but I don't recall seeing any Aspen. I just checked their website and they do show my local store carries it in 3 sizes.
Old 09-15-2014, 12:22 PM
  #219  
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You gotta really look for it. Like I said, it's usually in little cubbies like the balsa at the LHS. And at lowes, it's on the floor pretty much.
Old 09-15-2014, 12:37 PM
  #220  
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So it is get down on the floor to get. One we have it, then we have to fight and claw against gravity while the world spins. Lovely
Same thing at the LHS

Actually I have gotten wood from the exact places you mention Steve. Poplar and Oak. Seen several woods there. And you can usually see the label before getting down that far

Ken
Old 09-15-2014, 12:51 PM
  #221  
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Home Depot and Lowes both carry Aspen and Poplar. Lowes has the best Aspen and Home Depot for the Poplar, at least of my two stores. And fortunately they are across the street from one another. I will usually spend about an hour at each going through the entire stacks and pick the best grain of the bunch.
I believe the use of these woods over the normal hardwoods is why my Waco survived a cartwheel with only one balsa wing tip break.

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Old 09-15-2014, 01:52 PM
  #222  
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Recent cartwheel? Glad it wasn't too bad. That's a gorgeous airplane.
Old 09-15-2014, 02:00 PM
  #223  
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Originally Posted by stevegauth30
Recent cartwheel? Glad it wasn't too bad. That's a gorgeous airplane.
It was about two weeks after maiden. You can't tell where the tip broke after I stuck a syringe with ca in there and fixed it.
Old 09-15-2014, 02:07 PM
  #224  
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Robert Would ya be kind enough to point me to some pics of your Waco. I have not seen it. The first of your work I have seen is the little Pitts

Ken
Old 09-15-2014, 02:30 PM
  #225  
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There's video of it flying on the tube. Could be wrong, but I think the Chanel name is " imperial RC"

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