Bud Nosen Mr. mulligan
#201
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
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
#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.
#205
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.
Ken
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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.
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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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.
#209
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
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
#214
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
If you have a place that sells hardwood for cabinet industry they most likely will have it and probably spruce too.
Kevin
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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.
#220
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
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
#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.
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.
Last edited by acerc; 09-15-2014 at 12:54 PM.