Search found 85 matches

by petemorgan(pmoskico)
Wed Dec 10, 2014 1:03 pm
Forum: Ski/Snowboard Design and Layup
Topic: Design Considerations for underfoot stiffness
Replies: 6
Views: 6157

Design Considerations for underfoot stiffness

the basic formula for designing stiffness and flex is the thicker the core = a stiffer ski. But you also have to take into consideration the width of the ski and length of the ski. the formula is even more complicated when you start talking about materials! lets simplify and just focus on stiffness ...
by petemorgan(pmoskico)
Wed Dec 10, 2014 10:02 am
Forum: Ski/Snowboard Design and Layup
Topic: Binding Mounting: 3.5 vs 4.1mm depending on core material?
Replies: 10
Views: 12280

I do not use epoxy because it makes it more challenging to remove the screws. can even make it impossible to remove the binding without damage to the skis or bindings. I have not noticed there being any play in the screw holes for the dynafits. The toe piece has a thin metal sheet underneath, are yo...
by petemorgan(pmoskico)
Wed Dec 10, 2014 9:23 am
Forum: Ski/Snowboard Design and Layup
Topic: Binding Mounting: 3.5 vs 4.1mm depending on core material?
Replies: 10
Views: 12280

Thanks for the replies! Vinman, great info on the torque specs! I agree on avoiding epoxy and sticking with wood glue. @PMG, i am not aware of screws being different diameter. sounds like children bindings do, but other than that I am not aware of different sizes. Also @PMG, i would avoid using an e...
by petemorgan(pmoskico)
Tue Dec 09, 2014 3:47 pm
Forum: Ski/Snowboard Design and Layup
Topic: Binding Mounting: 3.5 vs 4.1mm depending on core material?
Replies: 10
Views: 12280

Binding Mounting: 3.5 vs 4.1mm depending on core material?

Hello ski builders community! I was speaking with a shop tech recently about when to use a 3.5 versus a 4.1 mm wide bit when drilling skis. The conclusion was that a 4.1mm bit is best for a hardwood core material like rock maple or bamboo so you have a wider hole so you dont crack the wood with the ...
by petemorgan(pmoskico)
Thu Mar 27, 2014 11:23 am
Forum: Ski/Snowboard Design and Layup
Topic: Ski design points and concepts
Replies: 15
Views: 16320

I like a tight smaller radius for quicker giant slalom carving turns, and the ability for super quick turns in tights spots. they wont feel that stable at high speeds, but for accelerating in and out of a carve, i just love a tight radius. how small of a radius have you guys gone? I am curious how t...
by petemorgan(pmoskico)
Tue Feb 04, 2014 10:55 am
Forum: Ski/Snowboard Design and Layup
Topic: Cutting a Swallow tail to soften up the tail
Replies: 9
Views: 7739

http://precisionmotions.wordpress.com/skportfolio/#jp-carousel-588 http://precisionmotions.wordpress.com/skportfolio/#jp-carousel-589 What do you guys think? http://precisionmotions.files.wordpress.com/2014/02/image2.jpg http://precisionmotions.files.wordpress.com/2014/02/image3.jpg I have riden tw...
by petemorgan(pmoskico)
Mon Feb 03, 2014 2:21 pm
Forum: Yard Sale (non commercial)
Topic: Ski Press for Sale: 1,750$
Replies: 0
Views: 3527

Ski Press for Sale: 1,750$

The press is relatively easy to transport but i cannot ship it. It is on cast swivel wheels and rolls really easily. The ski press has served me well over the years. i have built close to 40 pairs of skis with it. The mold is flat camber with rocker tip and has the option to add an insert to give th...
by petemorgan(pmoskico)
Thu Dec 19, 2013 3:01 pm
Forum: Journals: Log Your Ski Building Progress
Topic: Twizz 2013/2014
Replies: 34
Views: 23312

those edges look beefier than what i am used to seeing as edges, or is that just an illusion? The ski lab transitioned from a stiff, hard steel edge to a softer easier to bend steel edge. i was a pretty surprised when i first recieved them and a little disappointed. i am sure you wont ever notice th...
by petemorgan(pmoskico)
Wed Dec 18, 2013 7:32 am
Forum: Ski/Snowboard Design and Layup
Topic: Cutting a Swallow tail to soften up the tail
Replies: 9
Views: 7739

"am i right or am i right" surprised montucky didnt jump all over that. Thanks for the replies. That is some good analysis. It is getting more complicated as i build a whole range of skis from 190 cm to 155cm and 90mm underfoot to 120mm underfoot. dialing in that stiffness is tricky. One t...
by petemorgan(pmoskico)
Mon Dec 16, 2013 7:41 am
Forum: Ski/Snowboard Design and Layup
Topic: Cutting a Swallow tail to soften up the tail
Replies: 9
Views: 7739

Cutting a Swallow tail to soften up the tail

I was playing around with a pair of skis that i had built that turned out to be way to stiff. I wanted to soften up the flex, and i thought maybe cutting a big swallow tail might help make the tail softer. I cut the swallow tail about 6 inches deep from the tail, in a triangular shape starting with ...
by petemorgan(pmoskico)
Wed Dec 11, 2013 9:01 am
Forum: Ski/Snowboard Design and Layup
Topic: Squeezed epoxy?
Replies: 5
Views: 4122

are you guys using squeegees? I have been typically using a roller. my lady and i built a pygmy boat (mostly her), and pygmy always recommended using a squeegee and getting the fiberglass wetted out and then throwing away the extra resin. but this was just a wet layup without any pressure from a vac...
by petemorgan(pmoskico)
Tue Dec 10, 2013 10:17 am
Forum: Ski/Snowboard Design and Layup
Topic: Spooning
Replies: 16
Views: 11960

i agree with Twizz, that's high level shit bro. keep it simple stupid. But the discussion is not a bad one to have. I saw ignious skis in Jackon, WY doing a boat-hull ski. (i think that is a better description for this rather than spoon) It looked super sick and probably would be really fun to ski i...
by petemorgan(pmoskico)
Tue Dec 10, 2013 10:03 am
Forum: Ski/Snowboard Design and Layup
Topic: Wood Cat Track???
Replies: 9
Views: 8870

hmmm. I dont use a cat track and I get great even distribution of pressure basically using just plywood. There are many ways to skin a kitten. In tbetween my fire hose and top of skis is as follow, (starting from the skis topsheet); Parchment paper Fairly thin Alumiumum sheet (with some wax on it) 1...
by petemorgan(pmoskico)
Fri Nov 01, 2013 9:36 am
Forum: Materials and Supplies
Topic: Tri-Ax Fiberglass in narrow-ish rolls?
Replies: 15
Views: 10232

Montucky, your always so helpful. keep up the good work...
by petemorgan(pmoskico)
Fri Nov 01, 2013 7:32 am
Forum: Materials and Supplies
Topic: Tri-Ax Fiberglass in narrow-ish rolls?
Replies: 15
Views: 10232

Sicko! will be doing this from now on. Thanks twizz