Egg Trebuchet 2. Can I do better? 

I really like the sounds effect you added! 😆😆

Make another one! I think...: - Legs should be long enough to prevent the hole thing to lift at all. - Counteweight could be a magnet as you proposed.

I'm barely a third of the way through the video and already rooting for you!

you should call it Treggbuchet!

Two observations: (1) Might have greater stability and energy transfer if weight never strikes the ground and is more centered; (2) biomechanics similar to a tennis serve or baseball pitcher: centripetal force and conservation of energy: with a smaller radius (eg wrist) for final launch, a greater velocity is created (acceleration = velocity^2 / radius)

Egg-cellent entry Andy! We really enjoyed setting it off

Fantastic work, watching my own mind bend on something so trivial, classic

Great work! I always look forward to your videos

this is the 3rd vid I've watched this evening. I learnt something from the first 2 and a ton from this 1. its been a good day 😀.cheers.ta.

Awesome design. Very impressive eggsling.. :)

Now that you're converting the energy to a different form, there's no reason the arc of the counterweight has to go in the same direction as the arm. Having the weight behind the fulcrum when the arm fires should improve stability and reduce the tendency for the machine to tip forward. Ideas for next year I guess.

That is a brilliant piece of engineering no matter how the contest goes. I swear though, if you put wheels on that thing it would look like a Battlebots competitor...

Who said that you have to release the spring when the weight hits the floor? Anywho, your machine was the coolest.

I have enjoyed these videoes a lot. Rare to see so much of a enginering developement process, thank you for sharing with us! A thought: It looks like there is some energy lost at the end of the swing arm travel as the spring approach the dead low point. Could a solution be where the spring pull on a cable that goes around a sort of pulley, shaped a bit like a Logarithmic spiral? That would make the last energy transfer to the arm and probably make take the point of release above 45degrees (hope that makes sense?) Come to thik of it, a sort of kidney shaped profile for the pulley is perhaps better in order to provide the largest pull at the point where the torque is highest (and hopefully delay the point where the arm will tend to bounce)

Brilliant videos, I wasn't very interested in an egg trebuchet but so glad I watched. You're a very clever guy.

12:36 “in the egg-tual competition” 😆

07:24 @Abom79 :D

Excellent

Nice. Can't wait for you to do some work on your Terminator. Great work overall ✌

Spiral shaped pulley on the arm Like on Nautilus fitness machines. Or modern bows with pulleys. To modulate spring tension applied to arm as function of angle and time. Model, then solve for optimum pulley shape.

14:40 I think also, some are using crazy strong magnets. It's trend in past year.

Well done. It occurred to me that the weight reaching the end of its travel, being closer to the egg itself is it possible to give the egg A little nudge with the remaining energy in the weight? Perhaps with a block of rigid foam where the weight and the arm meet.

Eggbuchet

did u stop making terminator?

Who won and what distance

But is a spring not a battery? 😂