This is suppose to be a fun, build a concave mirror project, not a chain saw project. I own a chain saw, 100 ft of chain, come along, ladder, I could cut these trees down if I wanted to. I want to build a concave mirror. I can do the math for the tilt of each circle of mirrors but getting the...
I need to cut down a 3 year old dead tree from top down so tree causes no damage with small pieces falling. I need a mirror with a focal length of 150 ft. 12" diameter to 36" diameter will work good but I can't think of any easy way to build it. Nothing like this for sale on Ebay.
I have a...
Why would anyone want to loose money on purpose? Fun hobbies loose lots of money on purpose. I spent about a $1000. on model airplanes to have FUN. I spent $1000. on long range target shooting it took a year to learn how to shoot 100 aluminum soft drink cans 1/4 mile away and never miss. I...
Raised beds cost too much money. Lumber, screws, nails, potting soil, will cost very near $100 per bed. Potting soil is not real soil it is composed plants and has almost no food value of live plants. If your yard is rock you may have no other choice but to have beds. The taller beds are the...
Let it burn. It is natures way to burn the old to make way for the new we learned that in first year biology class. Why do people try to interfere with nature. TV said, this is a 50 year old forest it is full of dry dead material. If you want to live in the middle of a soon to burn dead...
Drinks are always red wine about 9:30 pm at our camp site. Trailer tongue is about 150 lbs. too light weight. Spare tire and several other items need to be moved up front. Total camper trailer weight = about 1500 lbs divide by 4 = tongue wt. should be about 375 lbs. or more for trailer to be...
I think I have it figured out just want to make sure. Camper trailer pushes down with a wt of about 450 to 600 lb how to find the exact togue weight with bathroom scales that only goes to 250 lbs.? I am using a strong board as the lever.
Fulcrum is at 0"
Trailer tongue is at 6"
If scales at...
This project needs DC current if I do nothing about ripple efficiency is 70.7%. If this project needs to run 2 days on flat line DC it will need to run 3 days on ripple DC. No flat line DC is not required but it saves time. Good example is, assume your driving along the highway at 70 mph and...
I can not use a constant voltage power supply. I found some good engineering data that says not to worry about holding voltage a 3v often voltage needs to go up to get the current to go up also.
Carbon rods should have .3a per square inch of surface area. Surface area on my carbon rods in the...
Problem solved 1 of the blue caps was bad. I learned 3.5vdc works but 3vdc does not, a 2kw variac connected to 120vac is working good. Amp meter reads 12a at 3.5v = 42 watts. All wires had to be changed to 15a wire. 40 carbon rod electrodes at the anode. Stainless steel pot is the cathode.
This project is suppose to be 50a at 3v. Your suppose to use 1000uf per amp = 50,000. uf. Carbon rods have a surface of about 1 sq inch. Carbon rods are suppose to be .2a per sq inch. 40 carbon rods are 40 sq inches. 40 x .2 = 8a. I don't have enough carbon rods to do 50a. I tried a...