44 replies to this topic

[gforce]

A 50 ft tower in his back yard for the whole summer.

Yeah right! Coastergeekrct was probably right the PVC got hot and fell over.

[Dakanektr]

he'll probably

go to steel eventually- even though thatll do the same thing but only in a year.

[coastergeekrtc]

Not if he makes a tower that is built really good. If it

is just one pipe then maybe but he would probably make an actual tower. Also, I think

he graduated and might be going to college.

[Pleasureland Fan]

Aha, Coastergeek! When is your launch tutorial

going to be ready, any idea? If you see my Booster Bike topic you will know why

[coastergeekrtc]

Um...if I have time today I will work on it but that is

only if I have time.

[Pleasureland Fan]

OK then, thanks, lol, don't think I am trying to

hurry you along, because I am not, I just like what you are doing that's all.

[coastergeekrtc]

I know it has been a long time since anyone talked

about this tutorial but I have a reason for this. I was goign to put it up about a month

ago but I had a problem with the launch on my coaster. The Knex were not strong

enough to hold the rubberbands (I doubled up the rubberbands to make the launch

smaller) and thus broke. Well I finally thought of a way to make it work and I think it

will. So now I have to redo the gearbox tutorial to make this work better. I dont think I

will do this untill winter break since I dont have the time.

[Antinos]

I was looking forward to this. I wanted to see the

secret behind all the torque in this.

[coastergeekrtc]

I tried my new idea and it works...sort of. The gear

box can now handle the force but now the main rod that the wheel is on bends and

thus the gear disconnects from the other gear. I added a second set of gears to stop

this but it didn't help much. I need to make the gearbox more structure to hold

this force. I have Thursday off this week and I MIGHT be able to work on it over the

weekend. We will see.

[Pleasureland Fan]

Are you using the black carbon rods? If not, these are

WAY stronger than the grey or other rods when using gears and pulleys at high pulling

power. They snap very rarely and are pretty good, you can order them from

K'nex.

[tobsson]

Oh thank you pleasureland, I have always

wondered why they have those black rods when Knex(Company) making lifts and

stuff.

[Pleasureland Fan]

No problem tobsson- I only found out about 4/5 years

back. I was creating the windmill that you see on the K'nex Motor Pack

instruction booklet. I used a gray rod for the axle and I was most disappointed when it

bent and snapped! My mom rang K'nex and asked why it was so. They

then sent us a pack of about 6 black carbon rods, and they are incredibly useful for

places where the structure is under a LOT of stress, or in this case on gearboxes and

lifthill motors, particularly at the top of lifthills where there is the most stress from the

chain.

[Ace o Spades]

Or, you can use the tan rosds.

[Adam_Deux]

Where do you get the tan rods from? I have one, but I

don't know from where. It's confusing.

[Dakanektr]

They had like two

from the original coaster. I'm in luck, I can't wait to use this launch, I have

like 50+ carbon rods.

[Pleasureland Fan]

Yeah, I think the tan rods are the same but I prefer the

carbon rods because they are longer and you can fit more gears ect on them if you

need to. You also get two or more tan rods in the K'nex Motor Pack with the

K'nex motor that plugs into the wall.

[coastergeekrtc]

I used the black graphite rod and now it is better.

The tan connector that keeps the gears on kept falling off but I fixed that. Now the

gears are slipping so I need to figure out what to do. In the tutorial I will have two

gearbox instructions: one for a long launch and one for a short launch with a lot of

force from the rubberbands.

[nitro9003]

That explains why the ss motor has a tan rod going

through it instead of a green one.

[Dakanektr]

Well, sorry to bring

this back up but is this tutorial going to be done anytime soon? I mean seriously.....

[Antinos]

He said that the pieces weren't strong enough. I

may try a LSM magnet launch. If it works i will use it on a coaster and make a

tutorial.