I used the trebuchet thingy idea.....probally gonna complete it tomorrow and test this bad boy out!!

here...for refference:

https://honda-tech.com/zerothread?id=1403061








Modified by m R g S r at 10:49 PM 11/30/2005

 

uh huh....hmm....so what is it? What does it do? Looks coo tho

 

sry...search my name and you will see the thread....hold on ill post it for refference

 

If its meant to throw something idk how well thats gonna work.

 

did you read the thread? its a tug o war...

 

Is it just sitting on the plywood and then the tugging spring is attached to the top of that arm?

 

looks like it will work to me. hope you are using strong springs and have spares. could you double them up and have 4 in a row instead of just the 2?

 

I'm really not following how this is supposed to work. Is the tug spring in equilibrium to begin with and attached at the top of the arm (opposite your other two vertical springs)? If thats the case, unless you're springs are under tension to begin with I don't really see this doing anything other than sitting there.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by daveG &raquo;</TD></TR><TR><TD CLASS="quote">I'm really not following how this is supposed to work. Is the tug spring in equilibrium to begin with and attached at the top of the arm (opposite your other two vertical springs)? If thats the case, unless you're springs are under tension to begin with I don't really see this doing anything other than sitting there. </TD></TR></TABLE>

thats where im sitting...how does it work, where does it pull from?

 

This thread is worthless without more information.

 

i believe the arm is in the resting position in the first pic. when you push the rod toward the other side it will create tension on the springs. you hook the arm up to whatever you want to pull and let the springs do their job. it will want to pull back to the resting position. atleast that is how i see it working. just make sure the base is anchored to something damn heavy.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RTErnie &raquo;</TD></TR><TR><TD CLASS="quote">This thread is worthless without more information. </TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by m R g S r &raquo;</TD></TR><TR><TD CLASS="quote">
https://honda-tech.com/zerothread?id=1403061
</TD></TR></TABLE>


couldnt you drill the holes for that bar, in front of these 2 uprights and mount the srpings on an angle, so that the base is in the front of the tower, i belive it would work better this way? or even drill the hole for the cross bar directly below the pivot point(all the way at the bottom) ......

anyone care to argue with me?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dturbocivic &raquo;</TD></TR><TR><TD CLASS="quote"> couldnt you drill the holes for that bar, in front of these 2 uprights and mount the srpings on an angle, so that the base is in the front of the tower, i belive it would work better this way? or even drill the hole for the cross bar directly below the pivot point(all the way at the bottom) ......

anyone care to argue with me? </TD></TR></TABLE>

was gonna do that but when the arm was pulled down the springs would hit the pivot point....plus they are very very heavy springs....42lbs each i think? its a bitch to push down the arm as it is now!!

And yes....its not done yet!!!!!! The arm is in the equilibrium position now...That tiny ledge looking thing is going to be where the latch sits. When the arm is pushed down under tension it will be grabbed by the latch. There will be a hook at the end of the arm on the side that you cant see in the pic. That attaches to the spring which attaches the two competitors.

The latch is then released and the arm shoots up and back somewhat. Not the best design, but ohh well!!

 

Did you figure out what to do to make it actually pull? I assume this is the raised pull point idea that was tossed around to kinda step around the rules?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by beepy &raquo;</TD></TR><TR><TD CLASS="quote">Did you figure out what to do to make it actually pull? I assume this is the raised pull point idea that was tossed around to kinda step around the rules?</TD></TR></TABLE>

sorta.....i guess we are just going to rely on the initial jolt and the spring attaching the two to help get it moving.....

 

Is it going to be able to pull enough without tipping over? Is the base heavy enough?

 

gonna add weight when its all done..

it can be 10lbs...it WILL be 10 lbs lol

 

Semi - off topic, but not really at the same time...

I was just in a marshmallow launching competition. My design, looks somewhat similar to yours. Many of the competitors used compressed air with PVC, but we decided to try something original.



Simple design, but it worked really well, we got within 3 inches of the 1 foot diameter target from 50 ft away.

 

nice nice...but that mo Fo is hugeeeee compared to ours

we were limited to a 10"x6"x8" size constraint....

 

Statics or Dynamics project?

 

introduction to engineering...im a freshmannnn

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by m R g S r &raquo;</TD></TR><TR><TD CLASS="quote">introduction to engineering...im a freshmannnn </TD></TR></TABLE>

Good luck with the project. What school are you at?

 

manhattan college...thanks btw

 

'05 fresh here too, UCF for me, our limit was $25 - no size limit

Also same class Into to Eng profession