when used right, wood is a great material, human's beautiful dragunovesque launcher is a great example If you just want to cover up a snargly mess of valves and tubing, it might not be the best choice, however, sheets of plastic, like the +bow's reciever can work there, sheetmetal can be used in a s...

Of course i saw that post :) that iphone mount looks pretty handy, i mean, maps, youtube guides for unjamming your made-by-the-lowest-bidder equipment, and music all at your fingertips! not to mention angry birds... I think more things need cupholders, like lawnmowers for example this should probabl...

I stumbled across this: "AR-15 and M4 and M16 Golfball Launcher Threaded and Machined Out of Solid Stock" http://www.cheaperthandirt.com/ctd_images/lgprod/ARR-225.jpg Looks like fun doesn't it? Only 20USD+shipping It's not the sort of thing I'd buy, being in Canada and all, I Just wondered what the ...

the height determines the pressure:
P=pgh
P:pressure (Pa)
p:density of the liquid (kg/m^3)
g:force/acceleration of gravity (N/kg or m/s/s)
h:height of the column (m)
more info (and practical use as a pressure guage) can be found HERE

ive got an idea:
let's say i didn't want to use spacer rings for my baffles, could i instead make grooves with a pipe cutter?
would the grooves be deep enough to hold a washer?

whatever happened to Risqué double entendre, often wringing innuendo out of perfectly innocent phrases. This is, in theory, over the heads of the children in the audience i mean, think of the children! moving on... mixing the several tonnes pf epoxy to mold a palace would be interesting what if the ...

Expanding gas[-based] launch systems Internal combustion catapults Compressed gas catapaults High velocity carbohydrate relocation and destruction devices do it yourselg flexible projectile choice expanding gas based launching systems (DIYFPCEGBLs for short) et cetera, mix'n match different pieces, ...

Naval cannons are rifled... so was this: http://i771.photobucket.com/albums/xx359/Linuxexorcist/220px-80_cm_Gustav_shell_compared_to_T-34.jpg http://i771.photobucket.com/albums/xx359/Linuxexorcist/05.jpg the Schwerer Gustav : 31.5" barrel, 39 km range, approx 14 rounds per day firerate, built to de...

or!

menu bar>window>entity info (ctrl/function+I) yay sketchup!

They're pinky and the brain/yes pinky and the brain/one is a genius/the other's insane! My thinking is that the lead ball is either gonna hold not enough or too much pressure, also the 4mm tube holding the ball could wear down, reducing the lifetime of the cart greatly Gunfreak, he'll force it in, p...

why do you think your spark is weak? If your not getting reliable ignition, the first place to look is how much fuel your'e putting in Admittedly, small scale combustions seem to be a dead end, not enough pressure to for smaller barrels can be generated by most fuels at atmospheric pressure I've had...

If you have access to a tap set, experiment a little, schraeder valves from bike tubes take well to a 1/4-28 NF thread in my experience: http://i771.photobucket.com/albums/xx359/Linuxexorcist/DSC_9152.jpg Soldering it should be fine, just make sure the hole is a tight fit, and remove your valve core...

Quick question: has anyone tried using wipes in an air rifle suppressor? i know firearm suppressors don't use them to reduce maintanence requirements, but they could be helpful in a less wear-and-tear situation like an airgun Wipes are inner dividers intended to touch the bullet as it passes through...

alright let me rephrase that: less than $50 for a medium bore hybrid? I think that's awesome. Although, i think what really brings up the price of a hybrid is the metering system. And being "resourceful" and pinching things from the lab is reasonable, there's a house under construction across the st...

I want to install a 1/4 inch NPT shrader, instead of binary adhesives. Really JSR? nothing to say on that? less than $50 for a hybrid? I think that's awesome, might look into it I probably would use copper pipe for the barrel, as this handy guide shows, it can take hybrid pressures. How do you inte...