Witch is stronger

**outasite** · 10-05-2018, 01:59 PM

Witch is strongest, One course of 3/4 balsa sandwich,or two courses of 3/8 with a mat between them?

**XstreamVking** · 10-05-2018, 02:51 PM

I would say 2 courses of 3/8'' with the glass in between.

**berdes** · 10-06-2018, 07:40 AM

Which witch? Think the witch of the east, but the witch of the west has some nasty tricks up her skirt. (Sorry, couldn't resist.)
However, agree about the double layer so long as the bond is good.

Originally Posted by outasite

Witch is strongest, One course of 3/4 balsa sandwich,or two courses of 3/8 with a mat between them?

**powerabout** · 10-06-2018, 08:06 AM

Originally Posted by berdes

Which witch? Think the witch of the east, but the witch of the west has some nasty tricks up her skirt. (Sorry, couldn't resist.)
However, agree about the double layer so long as the bond is good.

how would you build that, bag both layers together?

steel is stronger but if you want light strong carbon has to be involved
then there is the technology of stiff hull with no frames, and the weight crossover of that?

**nitro_rat** · 10-06-2018, 08:11 AM

Originally Posted by XstreamVking

I would say 2 courses of 3/8'' with the glass in between.

I would agree, but I have to wonder what “Tunnels” would say!!!

What are you building?

**XstreamVking** · 10-06-2018, 08:20 AM

What resin are you planning on using?

**FUJIMO** · 10-06-2018, 10:00 AM

Never consider any type of core as providing "strength".

**powerabout** · 10-06-2018, 10:15 AM

Originally Posted by FUJIMO

Never consider any type of core as providing "strength".

next boat my core will be helium, cheaper and lighter

**nitro_rat** · 10-06-2018, 10:28 AM

Originally Posted by powerabout

next boat my core will be helium, cheaper and lighter

For a small boat a nitrogen core will provide less bow lift than helium!

**powerabout** · 10-06-2018, 10:37 AM

Originally Posted by nitro_rat

For a small boat a nitrogen core will provide less bow lift than helium!

I was thinking taper core from back to front to hold up a a new 4slug

**FMP** · 10-06-2018, 10:39 AM

8 out of 10 apples, I'll eat the core

**outasite** · 10-06-2018, 11:15 AM

Originally Posted by XstreamVking

What resin are you planning on using?

Ether 1700 and epoxy,or vinal ester,1708 and mat.Im leaning towards the old school balsa,vinal ester.A process that I'm familiar with.My first balsa core lasted 37 years and ultimately failed due to impact damage.So I'll need the next one when I'm 104

**nitro_rat** · 10-06-2018, 11:21 AM

Originally Posted by outasite

Ether 1700 and epoxy,or vinal ester,1708 and mat.Im leaning towards the old school balsa,vinal ester.A process that I'm familiar with.My first balsa core lasted 37 years and ultimately failed due to impact damage.So I'll need the next one when I'm 104

Nothin like gp poly under the core. I’d finish the job with it.

**XstreamVking** · 10-06-2018, 12:05 PM

GP resin to set the core /1708 and some vinyl over it would be a good combo. Or, you could use the pre made core bedding compound to set the balsa in and vinyl/1708 over it. Setting core in resin and matt can be a PIA. (it wants to float) The core bond putty makes it a lil easier to get a good bond since it's not a liquid.