Jump to content

longeron material


Recommended Posts

I know it is not without its reasons but what is the rationale behind a spruce longeron?Is it for fighting stress concentrations? In a fully molded composite fuselage as is the case with berkut, I assume there must be alternative solutions to this.

Link to comment
Share on other sites

As I understand it the wood is there at least partly as a core material that won't be squashed when you put a bolt through it for mounting latches/hinges/seat belts/the step. I am sure there would be heavier alternatives, not sure why you would want this...

Mark Spedding - Spodman
Darraweit Guim - Australia
Cozy IV #1331 -  Chapter 09

Link to comment
Share on other sites

I used Tasmania Hoop Pine for my longerons. It was purely motivated by price. In Australia it is an approved substitute for Spruce. To buy spruce locally or have ASS ship it over would have cost $200-300. To buy a single clean board locally: $30.

Drew Chaplin (aka the Foam Whisperer)


www.Cozy1200.com - I'm a builder now! :cool:


Brace for impact...

Link to comment
Share on other sites

I dont think I will access to spruce approved for aircraft structurel use, and -not being a wood expert- I wont be able to tell if a strecth of spruce has flaws that prohibits it as a structurel member. what is the longeron made of in berkut anyway?

Link to comment
Share on other sites

there is a guy here in italy who is building a Berkut, I went to see it some months ago and I also had the same question:

what is the longeron made of in a berkut?


am I blind or there's nothing inside that longeron?


it's common with moulded parts to use an internal profile that is removed after curing but is this the case??

can anyone confirm it?

Roads? Where we're going we don't need roads. (Dr. Emmett Brown)

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information