Knex Famas Contest Entry

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About: i love knexing and hobbies are gas powered rc cars

Intro: Knex Famas Contest Entry

This is my entry it shot 55 feet with exellent acuracy and it had an internal mag pusher but sadly it was dropped and then went into surgery it didnt go so well so pic two happened

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    121 Discussions

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    Knarez

    9 years ago on Introduction

    It doesn't shoots 55 feet... Look. The trigger is damn infront of the system. There's a lot of barrel for the shot to travel through to get out of the gun. And looking at it, it doesn't even have a far pull back. It wouldn't shoot over 35, I'd say.

    19 replies
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    ashchetmKnarez

    Reply 9 years ago on Introduction

    Ram behind the trigger works VERY well in knex guns, VERY efficient. the gun goes like this: FRONT-TRIGGER-BULLET-RAM-BACK the ram has LOTS of room to to push the bullet.

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    Knarezashchetm

    Reply 9 years ago on Introduction

    No, it doesn't. The pin needs room to accelerate fast before hitting the projectile. With this, its pushed right against it. This is also why when you fire a simple single shot, you don't push the ammo by the trigger, but near to where the pin comes to a stop. To get the full momentum.

    Yup it is derived from:             Force = Mass x Acceleration

    and because  Acceleration is:  Velocity (Distance/Time) / Time
    it means that

    Force=Mass x Velocity (Momentum)
                 _______________________
                                Time

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    ashchetmKnarez

    Reply 9 years ago on Introduction

    Think a little bit more. The pin striking the bullet is MUCH less efficient. Lots of energy is wasted while the ram speeds up. Sure the ram is going much faster by the time it hits the bullet, but sudden dissipation of the energy is less efficient than a longer contact with the bullet. Even if your suggestion is more efficient, there is no way its so much more efficient that it matters what order you put them in. Also "bullet behind the trigger" setups are more accurate than a ram suddenly hitting a bullet and sending it tumbling. In light of "There's a lot of barrel for the shot to travel through to get out of the gun." The majority of knex guns have fake barrels that do not effect the bullet in any way.