Thank you for this excellent post. Interestingly, I had researched materials used by the early pioneers of flight many years ago, as I had been led to believe that Sitka spruce was the way to go. What I discovered then, was that even the Wright brothers had chosen Northern White Pine, as the most practical wood, and many other manufacturers as well. The designer of the Pou du Ciel (Flying Flea), Henri Mignet, also chose this wood above others, which is what inspired me to look closer. The price difference explains why an HM 293 Ultra leger Flying Flea, can be built for as little as 3,000 dollars, In these unsettled times, any measures that can be taken to maintain standards, and retain survivable profit margins, and to lower cost to the customer, has got to be beneficial to all parties. I wish both you, and your business, every success for the future. Kind Regards Nigel
It would be interesting to retest, with the cross section of each test piece adjusted so as for a given length, all the test species had the same weight. This is very interesting information, useful for those of us that build in wood other things than aircraft, but where strength is still important. THANK you for posting this.
How about COOSA board? It’s used in marine applications to good effect as a replacement for wood materials in structures. Lighter, no significant water absorption, no susceptibility to mold. It has similar ability to hold screws as plywood does.
This is all fascinating, but why not think outside of the box? Why not create a hybrid material? I have some suggestions in this respect if you are interested then contact me via my You-Tube business contact email. All that it will cost you is some time.
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Thank you for this excellent post.
Interestingly, I had researched materials used by the early pioneers of flight many years ago, as I had been led to believe that Sitka spruce was the way to go.
What I discovered then, was that even the Wright brothers had chosen Northern White Pine, as the most practical wood, and many other manufacturers as well.
The designer of the Pou du Ciel (Flying Flea), Henri Mignet, also chose this wood above others, which is what inspired me to look closer.
The price difference explains why an HM 293 Ultra leger Flying Flea, can be built for as little as 3,000 dollars,
In these unsettled times, any measures that can be taken to maintain standards, and retain survivable profit margins, and to lower cost to the customer, has got to be beneficial to all parties.
I wish both you, and your business, every success for the future.
Kind Regards
Nigel
It would be interesting to retest, with the cross section of each test piece adjusted so as for a given length, all the test species had the same weight. This is very interesting information, useful for those of us that build in wood other things than aircraft, but where strength is still important. THANK you for posting this.
Thank you I however believe you exceeded the rings per inch on the sitka Spruce.
The Zelin used a polish pine spar, the old NACA specs give yellow poplar as not a substitute but an alternative
How about COOSA board? It’s used in marine applications to good effect as a replacement for wood materials in structures. Lighter, no significant water absorption, no susceptibility to mold. It has similar ability to hold screws as plywood does.
Requires a finish, no? Coosa I have worked with had a fibrous surface...(like fiberglass)
you have to do impact tests
This is all fascinating, but why not think outside of the box? Why not create a hybrid material? I have some suggestions in this respect if you are interested then contact me via my You-Tube business contact email. All that it will cost you is some time.
hybrid is not that simple. difference in E-mod , moist and heat coefficients should all be taken into account.
What about laminated strips, alternating grain, bound by epoxy of water resistant bonding agent...perhaps even a much lighter species....
@@hammer44time27 Glue is heavier then Wood. The only truly recyclable aeromaterial is aluminium.
@@oheebatch_algorytmu Yes, glue is heavier than wood, but in a laminated structure the glue is only a small percentage of the total weight.
Have you ever considered Paulownia wood it is the lightest and strongest strongest hardwood.
grows like weed in the uk