loading
3CommentsJoined August 19th, 2016

Tell us about yourself!

Complete Your Profile
  • kbear99 commented on makjosher's instructable The Ski Sled4 days ago
    The Ski Sled

    Great and well thought out project Mak!I've been thinking about your issue of lack of turning responsiveness. For modern skis to turn most effectively at speed, they need to be angled onto their edge *and* be bent in a reverse camber in order for the whole edge be in contact with the snow. Your design is great for getting the skis on edge, and while you did introduce reverse camber into your design it might not be enough to turn effectively at speed.A skier can create a reverse camber effectively because their boot applies pressure at the center of the ski, thus making the entire ski bend during the turn. A typical sled design like yours applies pressure at the tip and tail, leaving a big dead spot in the middle. Yes you can build a reverse camber as you did but it's a catch 22 -- n...see more »Great and well thought out project Mak!I've been thinking about your issue of lack of turning responsiveness. For modern skis to turn most effectively at speed, they need to be angled onto their edge *and* be bent in a reverse camber in order for the whole edge be in contact with the snow. Your design is great for getting the skis on edge, and while you did introduce reverse camber into your design it might not be enough to turn effectively at speed.A skier can create a reverse camber effectively because their boot applies pressure at the center of the ski, thus making the entire ski bend during the turn. A typical sled design like yours applies pressure at the tip and tail, leaving a big dead spot in the middle. Yes you can build a reverse camber as you did but it's a catch 22 -- not enough reverse camber will compromise high speed turning (which is likely part of the reason you're lacking responsiveness), while too much will compromise straight run stability.Note also that your steering mechanism attached to the tips looks like it is further restricting the reverse camber shape when the skis are trying to bend at speed.A simple solution is to use much longer skis -- you'll have more tip and tail to shape into an arc, and more edge and ski to grip ice and snow. After all, 135cm skis are meant for the weight and stature of kids, not adults. Also, try to move the steering rods closer to the middle of the ski.If you're really ambitious, you could also modify your design to mimic the way that ski boots are attached to the centre of skis, that is, get the fore and aft aluminum legs closer together and equal distant to the boot centre mark on the ski. I have a feeling that getting it properly centred will also help with the edge catching problem.Ski boot contact length (ideal):(____________v____v________Current sled design contact points:(_______v_______________v__A new design would be somewhere in between. How you get there I leave in your capable hands. Looking forward to seeing your next version!

    Great and well thought out project Mak!I've been thinking about your issue of lack of turning responsiveness. For modern skis to turn most effectively at speed, they need to be angled onto their edge *and* be bent in a reverse camber in order for the whole edge be in contact with the snow. Your design is great for getting the skis on edge, and while you did introduce reverse camber into your design it might not be enough to turn effectively at speed.A skier can create a reverse camber effectively because their boot applies pressure at the center of the ski, thus making the entire ski bend during the turn. A typical sled design like yours applies pressure at the tip and tail, leaving a big dead spot in the middle. Yes you can build a reverse camber as you did but it's a catch 22 -- n...see more »Great and well thought out project Mak!I've been thinking about your issue of lack of turning responsiveness. For modern skis to turn most effectively at speed, they need to be angled onto their edge *and* be bent in a reverse camber in order for the whole edge be in contact with the snow. Your design is great for getting the skis on edge, and while you did introduce reverse camber into your design it might not be enough to turn effectively at speed.A skier can create a reverse camber effectively because their boot applies pressure at the center of the ski, thus making the entire ski bend during the turn. A typical sled design like yours applies pressure at the tip and tail, leaving a big dead spot in the middle. Yes you can build a reverse camber as you did but it's a catch 22 -- not enough reverse camber will compromise high speed turning (which is likely part of the reason you're lacking responsiveness), while too much will compromise straight run stability.Note also that your steering mechanism attached to the tips looks like it is further restricting the reverse camber shape when the skis are trying to bend at speed.A simple solution is to use much longer skis -- you'll have more tip and tail to shape into an arc, and more edge and ski to grip ice and snow. After all, 135cm skis are meant for the weight and stature of kids, not adults. Also, try to move the steering rods closer to the middle of the ski.If you're really ambitious, you could also modify your design to mimic the way that ski boots are attached to the centre of skis, that is, get the fore and aft aluminum legs closer together and equal distant to the boot centre mark on the ski. I have a feeling that getting it properly centred will also help with the edge catching problem.Ski boot contact length (ideal):(____________v____v________Current sled design contact points:(_______v_______________v__A new design would be somewhere in between. How you get there I leave in your capable hands. Looking forward to seeing your next version!

    View Instructable »
  • kbear99 commented on Luca Gerda's instructable Eerie glowing jars!6 months ago
    Eerie glowing jars!

    Oh? How so? Perhaps because you're thinking the commission is something that you as the end consumer must pay since it's added to the selling price. This much is true. However if you understood the economic benefits of e-commerce I don't think you would be so harsh. It's cheap and efficient marketing. Would you rather a vendor do marketing through TV commercials or overpaid athletes? Also, the author was completely upfront about it.This instructable is a nice idea btw.

    View Instructable »
  • kbear99 commented on Puzzledd's instructable Easy Cappuccino7 months ago
    Easy Cappuccino

    Wow I like this shake shake idea -- even easier and no need for a press. I'll have to look for a glass bottle for this. Like anything else it must not be capped when microwaving. Must also be careful when opening the cap after shaking.People should also be careful when heating liquids in a microwave. I know water can store pent up energy and explode unexpectedly. I've seen it happen to someone and it caused serious burns. Best to put an object like a chopstick in the liquid while it microwaves to dissipate the energy.

    View Instructable »