Instructables
This gun reached 6th highest rating for knex!!!

Whether you like it or not, here it is.

Because I cannot be bothered typing out a wall of text here is some stuff from my forum topic.

The concept behind The Logic Bow
By using a ratchet system to hold the bands behind the pin you can:
@ Decrease pin friction in barrel
@ Increase pullback distance
@ Increase power
@ Make the pin easier to pullback
@ Have a simple rail system

HOW IT WORKS
This is a pin type gun, not a slingshot. It uses a ratchet system to hold the rubber bands, therefore increasing the amount of bands that can be used and increasing ease of pullback. These bands are released when the trigger is pulled, propelling the pin into the bullet. This means that the effective pullback distance is increased, therefore increasing the range and power.

well here is the first "new thing" I have done in ages, (the last Truly innovative thing I built was the D-Frag grenade) the Logic Bow. It uses an all new 4-stage firing system that runs between two rails (I tried using a dual rail system but that didn't work out). So far I have the mech working, but it needs the rest of the body, the bow, a handle and probably a stock. It is a single shot that should have more power than a pin gun, the really cool thing about it is that although it uses a pin mech the pin takes almost no effort to slide back.

Review by Knex Gun Builder

and how I would rate it.
power 8/10 incredible power for a pin gun
rate of fire 2/10 for single shot version
rate of fire 5/10 for the turreted version, very slow
range 7/10 one of the highest ranged pin guns out there
comfort 7/10 comfy but could be better
innovation 9/10 first gun of its type, but not exactly new (lt licorice)
ease of use 10/10 my sister can use it, nuff said
looks 6/10 not the best looking gun, but fully loaded from the front like in the pics it looks cool
War Rating: I would recomend it for large scale wars because:
-It has a better range than most guns
-It is quite large
-Low rate of fire is really bad in close quaters
overall 8/10 or 4* but rate it whatever you want.

 
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shieldsam2 years ago
i added a stock and a scope but i destroyed it before i could get any pictures
destorny2 years ago
please repost the insturctions
destorny2 years ago
please repost the first two parts of the logic bow i can't get the lower part that is like a hand rail for comfort ......... to confusing :(
Hey logic boy, may I build this gun and give you credit?
DracoUltima3 years ago
I have built it, and it was not-so-good, the first is it takes a LONG time to reload. The second is that this mechanism ADDS friction. I have put on 7 bands thinking that it will go super far, but it didn't, 50 feet was what I got at best, with a sniper rod. Maybe, it's just me, or maybe it's just the gun, I'm not sure. I built it correctly, everything is identical. If you could, please post a video of it shooting 100+ feet.
I mean the range is still better than a lot of other knex guns but not as high as you claim. For now, 3.5*.
Fred the Penguin (author)  DracoUltima3 years ago
Hmm strange, tbh I never had any of those problems. as for the video, I am disinclined to build this gun again, I'd rather rebuild the newer version of it (picture below)

some possible solutions:
Pin/body not completely straight. this means that the pin has more friction than it should and would possibly cause reduced range, to fix replace pin/recheck body

Version: the singled version definitely shot further than the turreted version. Also remove the orange connectors under the pin, I found that they added alot of friction. (see step 7 for full list of mods)

Bands: use new #64 bands for best results and attach them one at a time, this makes sure that they fit together properly.
P1000310.JPG
travw4 years ago
So what's the range with 7 bands, and sniper rods?
Fred the Penguin (author)  travw4 years ago
I think like 40 metres or something maybe even 50. I can get 30m flat with 5 bands and a sniper rod. Also don't bother with oodammo for this gun, they flip, can you believe it? oodammo defeated!
what??? it can't be!
50 meters? Woez. I can't believe Oodammo doesn't work with this! Did you push it all the way in? Did you make the Oodammo correctly? /sarcasm
Oodammo is ment to be shot flat, because the wieght of the two sides of the red connectors make it accurate, in this becasue the grey connectors are close to each other on the turret, you have to put the oodammo in on a slant, so they aren't flat
Fred the Penguin (author)  travw4 years ago
the oodammo just spins wildly out of control and falls to the ground, sniper rods don't do that.
How far does it go before it bites the dust?
*"Another one rides the bus.........Another one rides the bus........."*
Fred the Penguin (author)  travw4 years ago
unsure
Estimate? 10 meters? 20,000,000 meters?
Fred the Penguin (author)  travw4 years ago
sorry for the unsatisfactory reply, I had to go cook dinner, we had meatballs!
when testing guns inside our house I use my firing range, it is 10m long with a target at one end. I aim at the centre of the target (a4 page) and fire 10 rounds, from this I can judge a guns performance.
Using oodammo with 4 64's on Logic Bow I hit the target 1/10 times, with sniper rods I got 10/10.

I think it would fire oodammo maybe, 15-20 meters with a bit of luck?
Ok, no problem.
Wow. I wonder why it doesn't work for you?
How do regular rods work? Like reds or yellows?
Fred the Penguin (author)  travw4 years ago
worse than oodammo, 15 meters if I'm lucky, best ammo for this after sniper rods are red rods with a red connector tip.
Cuel.
Fred the Penguin (author)  travw4 years ago
I got time.
DSC02882.JPGDSC02885.JPG
 can you add stock
Fred the Penguin (author)  cranberys4 years ago

i did, but don't bother with that old version, the as yet unreleased version kicks its @$$ in every way.

Cuel.
Fred the Penguin (author)  travw4 years ago
If I get time I may stick a turret on this just for the hell of it.
nice
1825154 years ago
Where does the pin guide attach to the back?
travw4 years ago
"...they aren't necessary..."
Nobody cares about grammar mistakes, just go away and stop correcting people...
 WHAT?  You can't be serious........................... >_>
heatblast4 years ago
The rating is 4.02* now :). I think the haters left the building, just like Elvis Presley.XD. I would'nt be so sure though, sometimes they come back to haunt you a second time. :(
ha i improved it so now your wrong
Wow, you sure are a sight for sore eyes LOL jk XD.
Fred the Penguin (author)  heatblast4 years ago
I don't really care for ratings
Good for you!:) You don't have to care, they're just DUMB ol ratings anyway. :p
Pizzapie5004 years ago
Aww, you didn't post this...
Fred the Penguin (author)  Pizzapie5004 years ago
it should be easy enough to make from the pics especially number 11.
Vynash4 years ago
This gun is great!

I love it 5*ed and favorited!
 great gun i have some pics for step 2 if you want them just tell me and ill up load them
 made a parts list

rods:
green:110
white:39
blue:19
red:6(2 tan)
gray/black:1
flex1 orange:1

connectors:
dark gray:22
orange:42
lt gray:2
red:30
green:12
yellow:39
blue:10
white:21

other:
blue spacers:20
tan clip:3
 NOTE: THIS WAS THE SINGLED VERSION.
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