Search found 2353 matches

by MontuckyMadman
Wed Jul 03, 2019 4:23 pm
Forum: Ski/Snowboard Design and Layup
Topic: Engineering interview questions
Replies: 2
Views: 112

Re: Engineering interview questions

Have u fea modeled a tapered multi composite laminate structure to determine load/deflection and failure points? Aka have u designed a ski and tested it in a simulation? Do u know the harmonic frequencies associated with ski damping? Do u understand strength and stiffness weight ratios and janka har...
by MontuckyMadman
Sat Jun 08, 2019 11:39 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Silicone sheets in north america
Replies: 1
Views: 220

Re: Silicone sheets in north america

Did u try these people? U have to know exactly what u want to buy from them. http://www.diversifiedsilicone.net/index.html Hows bout these? http://sscrubber.com Http://www.rubbercal.com The chinese are the hungriest. U should hear from someone in 12 hours minimum if not try another. There all prolly...
by MontuckyMadman
Wed May 01, 2019 9:22 am
Forum: Ski/Snowboard Design and Layup
Topic: Pre-treating paulownia or balsa core
Replies: 15
Views: 687

Re: Pre-treating paulownia or balsa core

I know u think I'm crazy but a super thin water based poly topcoat would seal and be porous to accept epoxy and good for bonding in all my tests. Cheap, quick and easy.
by MontuckyMadman
Sat Apr 13, 2019 1:34 pm
Forum: Ski/Snowboard Design and Layup
Topic: Expert forum: QCM epoxies (Questions answered!)
Replies: 32
Views: 45096

Re: Expert forum: QCM epoxies (Questions answered!)

Micro balloons and carbon black are additives in toughened epoxies. Cotton chips sounds like it could increase viscosity and prevent penetration to the thick fiberglass tows used in the 22oz and heavier glass weaves. It's also not completely necessary. The quality of the newest epoxy coatings is ver...
by MontuckyMadman
Thu Mar 28, 2019 5:32 pm
Forum: Ski/Snowboard Design and Layup
Topic: Best cut of wood for core wood
Replies: 7
Views: 521

Re: Best cut of wood for core wood

Lamination is the destination.
by MontuckyMadman
Thu Mar 28, 2019 5:30 pm
Forum: Yard Sale (non commercial)
Topic: Hypothetical: paulownia lumber
Replies: 2
Views: 288

Re: Hypothetical: paulownia lumber

Im in for some.
by MontuckyMadman
Sat Mar 23, 2019 4:41 pm
Forum: Ski/Snowboard Design and Layup
Topic: side wall delamination
Replies: 6
Views: 474

Re: side wall delamination

Ur prolly gonna have to give more details.
How did u profile?
Planer crib?
Did u leave it longer for snipe?
Router jig?
Did u glue it down?
Overhead sander?

Maybe u wanna use pu glue?
Maybe u wanna prebond ur sidewall to wood and rip and stick to core?
Maybe u should read the forum?
by MontuckyMadman
Wed Mar 20, 2019 2:44 pm
Forum: Journals: Log Your Ski Building Progress
Topic: Doing things on the cheap
Replies: 9
Views: 769

Re: Doing things on the cheap

Well literally every builder who does not have machined cassettes pre bonds edges with ca glue. That's allot of companies. So there's that. Watch a never summer vid. Excess usage of ca could create a bonding issue. U should do some sample coupons and lay them up with different types and amounts of g...
by MontuckyMadman
Wed Mar 20, 2019 1:07 pm
Forum: Journals: Log Your Ski Building Progress
Topic: Doing things on the cheap
Replies: 9
Views: 769

Re: Doing things on the cheap

I see um. Rabbet before you profile. Masking tape works to attache tip and tail spacer and bonds surprisingly well. Ur epoxy pot life is literally the time in mass in a pot and will exothermically kick in mass not when its all skimmed out on the board. Any epoxy mixed correctly will eventually cure ...
by MontuckyMadman
Mon Mar 18, 2019 9:49 am
Forum: Ski/Snowboard Design and Layup
Topic: First core design ever
Replies: 20
Views: 1224

Re: First core design ever

Etas
by MontuckyMadman
Thu Mar 14, 2019 8:29 pm
Forum: Ski/Snowboard Design and Layup
Topic: First core design ever
Replies: 20
Views: 1224

Re: First core design ever

Eatass
by MontuckyMadman
Sun Mar 10, 2019 12:19 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: profiling cores
Replies: 6
Views: 689

Re: profiling cores

I think people have had luck with the helical style planer blades rather than straight blades.
They are much more expensive but worth it in the long run.
An overhead sander is more ideal.
Make the core longer than need to account for snipe.
Hot glue.
Spacer at the ends.
U can do it!
by MontuckyMadman
Thu Jan 31, 2019 4:07 pm
Forum: Ski/Snowboard Design and Layup
Topic: Section8-titanal
Replies: 32
Views: 4539

Art, score and snap.
Watch the donek vid eh?

https://youtu.be/_61vcevx_3g
by MontuckyMadman
Sun Jan 27, 2019 11:14 am
Forum: Journals: Log Your Ski Building Progress
Topic: Innegra/carbon
Replies: 4
Views: 496

Thanks for the post.

What's your total weight?
I found the innegra/carbon weave to be both bulky and a resin sponge in wet layup.
I'm also concerned that the innegra is a polypropylene and is one of the most difficult materials to laminate.
by MontuckyMadman
Fri Jan 04, 2019 6:38 pm
Forum: Ski/Snowboard Design and Layup
Topic: Routing sidewalls
Replies: 10
Views: 985

I personally think doing this both ways several times the tilt router laminate trimmer is the way to go. You can start with low angle and do a couple passes while increasing the angle. Its much more finesse but easier IMO. Yes flat to base is key otherwise gets chunky. Spend $60-$100 or more its wor...