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  • Shimon - Stan commented on LanceMakes's instructable The Best Rubber Band Car6 weeks ago
    The Best Rubber Band Car

    Very nice. Will have to try this with my grandchildren. The reason you want the added weight on the wheels is because it will increase their angular momentum and keep them turning (ie pushing the car) longer. Basically, fly wheels. Weight will be more effective if it is added as close as feasible to the rim (far from the axle). Of course the wheels need to be well balanced (the weight distributed symmetrically. around the circle.) A good way to do this is by adding equal weights to each of the spokes.

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  • Hot Dog Cooker / Solar Oven

    Nice idea. Have to try it with the grandkids.I agree with the suggestion of lining it with aluminum foil to get better reflection.A few suggestions for improvement:1) Instead of putting the skewer through the center of the can, put it half way between the center and the back of the can (away from the opening. That is where the sunlight is going to focus. So it will get absorbed by the hot dog and turn into heat.2) Instead of cutting the rectangle out completely, leave it attached along the bottom edge and fold it down so that it reflects more sunlight into the can and heat it up more. It's best to try to adjust the angle to aim the reflected light onto the hot dog.3) Condensation will always show up when there is a cold surface adjacent to hot moist air. The whole idea is for it to be h...

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    Nice idea. Have to try it with the grandkids.I agree with the suggestion of lining it with aluminum foil to get better reflection.A few suggestions for improvement:1) Instead of putting the skewer through the center of the can, put it half way between the center and the back of the can (away from the opening. That is where the sunlight is going to focus. So it will get absorbed by the hot dog and turn into heat.2) Instead of cutting the rectangle out completely, leave it attached along the bottom edge and fold it down so that it reflects more sunlight into the can and heat it up more. It's best to try to adjust the angle to aim the reflected light onto the hot dog.3) Condensation will always show up when there is a cold surface adjacent to hot moist air. The whole idea is for it to be hot inside and the hot dog will make it moist. It should help to use a double layer of plastic wrap with an air gap between them. Thick double sticky tape is one way to accomplish this.4) Instead of a skewer use a meat thermometer. That way you'll know the temperature inside the hot dog where it really counts.

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  • Shimon - Stan commented on seamster's instructable Easy-Peasy PVC Water Gun2 years ago
    Easy-Peasy PVC Water Gun

    Great design!If you make the outer 1 1/4" pipe half an inch or an inch shorter than the inner 1" pipe, you can assure that no one will get pinched.

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