Introduction: Life Size K'nex War Cannon

Here it is the best of the best life size (or almost life size) war cannon. Yes I know there are lots of knex cannons on Instructables but this one is different from the rest. It looks like a cannon. It will shoot 60 - 70 feet with 2 rubber bands ,and will shoot though 4 pieces of paper. This does use ALOT of parts so I took the time to take a part count so you don't waste your time. It uses a more simple trigger Then IAC cannon but it(kinda) uses the same mech.

PROS:
looks great
wonderful distance 60 - 70 feel with 2 rubber bands
will completely destroy 3 pieces of paper

CONS:
uses a lot of pieces

Step 1: Part Count

RODS:

76 gray

70 red

37 yellow

27 blue

55 white

100 green

Connectors

17 white

40 blue

44 yellow

58 purple

70 green

27 red

6 gray

11 orange

misc:

4 gray clips

8 small gears

I can't give a number of spacers. Because the number will differ for each person.

18 black hands

2 rubber bands

Step 2: Wheels

Okay you might recognize these wheels they are from IAC's cannon but I enlarged them by 5 times.

Step 1: build 2

Step 2: add rods to one of them

Step 3: Build 8

Step 4: connect both sides

Step 5: add rods with spacers to all of the spaces

Okay now do this whole section again.

Step 3: Barrel

Okay I tried to do this as good as I could but it was very difficult for me to make this part of the Instructable.

PIC 1-2: build this part (it is the front of the barrel) PC 2 is of the same part upside down

PIC 3-4: build this. It is the middle part of the barrel.

PIC 5-6: build . This is the back part of the barrel and the firing mech


If you can't follow any of this Instructable let me know on my orange board and I'll try to help.

Step 4: Connecting the Barrel

Okay now we are going to connect the three parts of the barrel we just made.

Pic 1: connect the 3rd part with the 2nd

Pic 2: now connect the front with the rest.

Pic 3: you are done with the barrel it should look like this. ignore the bow thing we will make that in a bit

onto the next step. >>>>>>>>>

Step 5: Body

Okay this is more easy.

Step 1: build 2

Step 2: build this little thing ( both rods need to be black)

Step 3: connect the last 2 parts we made together

Step 4: connect both sides with the red rods

Step 5: build

Step 6: add last part

Step 7: add gray rods

Step 8: add gray rods


Yay half way done!! onto the next step >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Step 6: Stand

okay. We are to the stand.


Step 1: build

Step 2: build

Step 3: connect both sides

Step 7: Connect the Parts

It is time to connect all the parts.

Pic 1: connect body and stand

Pic 2: add 3 spacers on each side.

Pic 3: add wheel and put however many spacers needed to fill the rod (will be different on each side)

Pic 4-5: now we are going to connect the barrel to the body.

Pic 6: Build

Pic 7: tie 2 rubber band together

Pic 8: add "bow" and rubber bands

Pic 9: build

Pic 10: build

Step 8: Loading & Firing

This is very easy

Pic 1: Load it like this.

Pic 2: pull rubber bands back and hook onto the ammo.

when you are ready to fire just pull out the pin.

You are done!!!!!!!!

Have a lot of fun!!

If you have any questions let me know.

Let me know what you think.

Comments

author
master-splinter306 made it! (author)2015-07-13

Awesome!

author
knexinventer made it! (author)2014-02-02

This was the first of the cannons that i built about four and a half years ago on this site.

author
bob the HUNTER made it! (author)2012-03-10

dude this thing rocks just built but the only down side is that is does not shoot good for me

author
Dr MonkeyMan made it! (author)Dr MonkeyMan2013-06-25

I built 4 of this but i didnt bulled the wheels so i took the cannon pieces and attached the barrels to my arm and walked to into the libreary with it....

author
Dr MonkeyMan made it! (author)2013-06-25

I built this and i tested out how far the projectile would fly so i put it in our drive way and pulled the trigger and the piece flew out and hit a moving car. The person stopped so i pulled the cannon behind are car and waited for him to leave.

author
Sypran made it! (author)2009-01-17

cool, I'm gona build this and put a seige on the playground fort hahaha

author
erikos kostarikos made it! (author)erikos kostarikos2009-05-19

good idea
XD
im gonna terrorisate the mcdonald's playground=D

author
tjdtjd1 made it! (author)tjdtjd12010-04-08

sounds fun.... can i join in?

author
erikos kostarikos made it! (author)erikos kostarikos2010-04-12

Sure!
That's gonna be fun!!
Let's both build one and shoot children?

author
dansdoc made it! (author)dansdoc2013-04-03

i would but im 3 years too late :3

author
Seleziona made it! (author)Seleziona2009-10-24

 rofl!

author
knexgunbuilder217 made it! (author)2012-07-24

do u have to use the flexi-rods for the barrel

author
skyfaller made it! (author)2010-10-10

This is good!

You should check out I_Am_canadian's knex heavy cannon.

author
Brad G made it! (author)2010-10-02

Modded this quite a bit, ALOT less skeletal it looks pretty awesome ;) fully metallic shoots a bigger projectile (like IAC Cannons) and the end of the barrel is modded a little, i will try and get pictures thanks for making this great cannon ;)

author
instruct39 made it! (author)2010-09-07

you need cannon ammo not little tiny ammo u cant find after shooting it, other than that very cool! 5*

author
clader1 made it! (author)2010-04-11

dude it doesn't go 60-70 feet. you lier i shot it it went 150-200 feet !!!!

author
dnmonsen made it! (author)dnmonsen2010-06-19

cool

author
matsermetsuiker made it! (author)2010-01-23

lol XD its really cool!

author
Furloy made it! (author)2010-01-09

 4.5 stars, it skeletonish

author
Killer~SafeCracker made it! (author)2009-12-19

I gotta say it looks good. 4.5*

author
codemaster2590 made it! (author)2008-10-27

i think that it is really cool but i do agree that it could use more reinforcement. I think that it would be cool if you made it a breech loading cannon if you made any mods to it.

author
knexkrazy made it! (author)knexkrazy2008-10-27

Thanks! I'm working on a second version that has more parts, but it takes a lot of pieces.

author
Bartboy made it! (author)Bartboy2008-11-30

Umm? "second version that has more parts, but it takes a lot of pieces." LOL

author
Killer~SafeCracker made it! (author)Killer~SafeCracker2009-12-19

LOL

author
charlie farthing made it! (author)2009-04-27

so how far can this canon shot 70 80 feet or is it a low range gunthat can only shot about 20 feet

author
Jesus. made it! (author)Jesus.2009-09-02

lol it say right there /\ /\ /\ /\ /\

author
Skreetsha made it! (author)2008-11-03

Cool! A bit skeletony but, it probably functions as it looks, and that would be great :D 5 stars!

author
I_am_Canadian made it! (author)2008-10-29

Oh yeah... Nice wheels Nice pictures.

author
alfpwns made it! (author)2008-10-29

*BOOM* OWWWWWWW

author
builder968 made it! (author)2008-10-28

pretty cool. I know i dont have any howework tomorrow evening;might build.

author
builder968 made it! (author)builder9682008-10-29

then again, i might not. might build on sunday(saturday i have a friend's party).

author
arrow shot made it! (author)2008-10-28

nice, but i hardly believe that cannon barrel is life sized...maybe provide us with a picture? of the real thing>?

author
knexkrazy made it! (author)knexkrazy2008-10-28

This is the cannon I was modeling it after. Of course I can't go true life size without using a TON of parts. But, I called it life size because it is VERY big and looks pretty much like the real thing.

Cannon_pic.jpg
author
arrow shot made it! (author)arrow shot2008-10-28

Yeah, it actually is almost life sized...If i had to guess, i would say 5/8? Havent built this yet though, so idk...too many peices for me XD

author
apples!!!!! made it! (author)2008-10-28

Now I don't know if I want to work on the one I wanted to....

author
yerjoking made it! (author)2008-10-28

Wow, I'd just love to sit at the back then fire it at someones face, they'd get owned lol.

author
Master_Zane made it! (author)2008-10-27

Sweet! Looks Great!

author
knexkrazy made it! (author)knexkrazy2008-10-27

thanx

author
uguy made it! (author)2008-10-26

Life size?

author
knexkrazy made it! (author)knexkrazy2008-10-27

I said in my intro that it was "almost" life size. Actually, it isn't too much smaller than some cannons, but obviously not "real" life size.

author
DJ Radio made it! (author)2008-10-27

cool, also love the realism of a civil war cannon. 5*

author
knexkrazy made it! (author)knexkrazy2008-10-27

Good, I'm glad you like it. I was trying to make it look realistic.

author
I_am_Canadian made it! (author)2008-10-27

Very nice! A tad "Skin and bones", but there is no great way around that without using a load of pieces. Nice work!

author
knexkrazy made it! (author)knexkrazy2008-10-27

Yes, I agree. I'm working on a second version that has more body to it. You are right though - it takes a ton of pieces to make it fuller. But, this one works very well and is a lot of fun to shoot.

author
pls made it! (author)2008-10-27

thats looks great:)

author
the_burrito_master made it! (author)2008-10-26

lol nice it v=could use some more detail/re-enforcing but pretty good.

About This Instructable

4,156views

4favorites

License:

More by knexkrazy:Life size k'nex war cannonTZ -1,000 knex ten shot pistolKnex
Add instructable to: