"Hack to Pull-Back" campain by TLG

[Void_S]

Hello folks, just a minute ago found that TLG started a campain "hack to Pull-Back", with some really non ordinal use cases of Puall-back motors.

pullback - LEGO.com US

Yeah, they still can't beat amazing clockwork MOCs presneted here, but all these machines are really someting new that comes from TLG these days.
As for me, they somehow remind me old multifucntional sets from 90'ths years.

So far the ideas are:

1. Paper plane launcher (inclined ramp with wheeled "grabber" which throws the paper planes).
2. Helicopter (actually its main propeller only) launcher.
3. Crazy machines inspired rope lift driven by the rear axle of El Loco Torro set 
   Somehow it reminded me the truck turned into the dynamo machine in the "Predator" movie, when it was running the electric generator via the belt connected to the rear wheel as a pulley.

[SaperPL]

The propeller launcher video is actually stating that you can build it having the set, which IMO is not true because you need two same panels and not opposite ones for the propeller to by symmetric...

As for some ideas I'd be thinking about:

1) someone on a discord server that I'm on had an idea of using the pull backs as energy storage for the vehicle (or anything) exploding. So making a mechanism that makes panels all over the car be thrown away when the bumper hits something and releases the spring tension.

2) something like trebuchet/balista could be interesting

3) If you have two of them, make a ramp and a locking mechanism that will unlock first one to drive towards the ramp and the second one to be unlocked when you're entering the ramp for additional boost right at the ramp

4) making RC model that somewhat manages to use those pull backs as a nitro boost storage. It would be cool to either have mechanism to slowly wind up it on its own, but it seems complicated. Option to have few of those for two or even four "charges" could be nice, but again it seems like additional complication.

5) making mechanism for the tank cannon with something like this

[Void_S]

@SaperPL, interesting ideas, thank you for sharing.

As for me, so far my ideas more conservative and still car/vechicle based but different from the mainstream "TLG PullBack Idea":

1. 4-motors pullback car with two motorized axles and syncronized ratchet locks: they have independent ratchets (so front, rear or both axles at ones can be charged) but the "go, baby, go" lever unlocks them both. As a result, it should be the AWD car with amazing speed and torque but no necessity to charge all four motors at once (that could be difficult for "young racers"). As a side effect, if you change only front or rear axle, you may also get FWD or RWD car and make some interesting tests of how they perform and which config is better.
2. A car with two pullback motors but one has additional gearing, so it winds up slower and still keep pushing the car when the 1st motor is done and top speed is achieved.
   I beleive this configuration will start slower that regulare twin-pullback setup but may have better top speed. Like 1/4 mile vs 1/2 mile runners challenge.
3. Pullpack caterpillar-ed "Ripsaw" idea has alrady failed - tracked chassis has too much friction and rolling resistance so stops immideatelly when the pullback motor stops.
4. A kind of KERS analogue. I had some ides of "buster" connected via the gearbox or some other RC-activated trigger but it would be too heavy, so now I like more the idea of always-connected Pullback motor. When it is not changed or has alrady done its job, it does nothing thanks to it internal ratchet clutch. But when charged, it will always try to help the PC motors(s) to rotate the driveshaft, and I see it as a prefect idea of a "start-booster":
   • It will assist in reacing the the top speed from zero acting as one more motor sued only during the start. The motor with a huge torque)
   • Such assiatnce will not only additionally push the model better but also make the RC motors life easier by decreasing the current peak when the motors start moving the model at full voltage.

That's the list of my thoughts so far.

[SaperPL]

1 hour ago, Void_S said:

 4-motors pullback car with two motorized axles and syncronized ratchet locks: they have independent ratchets (so front, rear or both axles at ones can be charged) but the "go, baby, go" lever unlocks them both. As a result, it should be the AWD car with amazing speed and torque but no necessity to charge all four motors at once (that could be difficult for "young racers"). As a side effect, if you change only front or rear axle, you may also get FWD or RWD car and make some interesting tests of how they perform and which config is better.

Interesting. What about a ratchet locks that make it so that it first does a wheelie/thrusts upward at rear axle and the front axle is constructed in a way that once it lands back, the second batch? It might be interesting.

[msk6003]

4 hours ago, Void_S said:

A car with two pullback motors but one has additional gearing, so it winds up slower and still keep pushing the car when the 1st motor is done and top speed is achieved.
I beleive this configuration will start slower that regulare twin-pullback setup but may have better top speed. Like 1/4 mile vs 1/2 mile runners challenge.

I also think similer thing when we did pullback contest. Even I can't build because in that time I'm in korea army.

My idea is connect two pull back motor with ratch which connected to rear wheel. When one of motor is done, ratch is active second motor for more running.

10 hours ago, SaperPL said:

making RC model that somewhat manages to use those pull backs as a nitro boost storage. It would be cool to either have mechanism to slowly wind up it on its own, but it seems complicated. Option to have few of those for two or even four "charges" could be nice, but again it seems like additional complication.

Here is model which you want.

 

[roeltheworld]

There's a catapult moc out there somewhere with instructions. it's quite good. 

maybe some kind of amusement park ride would be an idea for this project as well.