uuummm... cool but which one was you? Sorry to dig up an old thread , i am the 14 year old fella saying "its so fun flying these things man". Anyway I have reached a Climax of 2000 ft and i am not BS , everyone agreed , This in October . Here is a Link to a pic of one of my rocks its the the tall o...

For example , i have a 100mm chamber right but the closet selection i can choose is sch40 4'' but in australia we use the metric system so its kinda hard to get accurate measurements, Visit The blunk lake site click on ratcal live ( which is a C:B ratio calculator). you will see what i mean . :roll:...

Sorry i haven't posted in a while , do have other hobbies too ( model Rocketry). I was just wondering i why i can type in my own dimensions for the combustion chamber and barrel . I always have to select a a part that is the closte to what i can get, is there a way to type in your own dimensions . I...

http://www.jimboomba.net/gallery/g2data ... Launch.mpg

what is the length of the barrel

jackssmirkingrevenge wrote:

MrCrowley wrote:Super Secret?!

Aye

you guys are wrong pressurising water can be presuurised look a this example , this guy has filled a pet bottle with water connected a hose to it and adding more water thus pressurising it

that is right my friend im one of those people with out much resources too.

Well the cannons me and bubba05 have is a two cap screw system where the igniter is under the combustion chamber but i the middle and the barrel is 38 in long with a 60mm inner diameter or ID for short and the combustion is 100mm in dia.

The ratio 0.85.1 is that a good ratio

:sign3: ha

trust me it happens all the time to me but the old foks across the find it very entertaining Im hoping to move to a bigger cannon.

Hey wat colour is your cannon going to be mabey camo colour

you could probably measure DYIs penis on the ruler above 1.5 inces

Since i dont know much about combustion cannons, i was asking for good methods of measuring ratios i was looking at Wiki and i wanted to know how you guyz figure out your ratios so i can use the same priciples to measure my cannons preformance which i have no idea about. So plz tell me how you guyz ...

LOL

Mabey bright yellow or orange will be a good colour but the cotton dose stretch and becomes less thick like it went from 3mm to 1mm so its thin once you strecth it out. Whohad the idea of a rubber band recovery :shock: ha ha i would propbably drop the cannon and stand back in case the ball comes bac...