Battery Buggy B

[MadCow2357]

put the wingnut braking on the back so the stopping is more natural and so that if you go too fast, you won't flip or something like that also, pick the 3 7/8th wheels. If the wheels are too big you might not have precision in braking with the wingnut. the motor was 32000 rpm unloaded at 6v and 39000rpm at 7.5v. i used lite flite wheels from towerhobbies.com

I assuming that the wingnut/threaded rod braking system should be on the front axle then.
Did you use bushings or ball bearings?

[SlipStrike1244]

i used bushings and just drilled a hole in the frame and stuck the threaded rod through. for you, i recommend bearings because my trash frame gave me a problem: the threaded rod screwed into the bushings for some reason, and i had to spend a lot more time than i had to fixing it. it was worth it though. for a cheap price i could have the entire rod act like a bearing. and for the motor, i just wanted it to be fast so i could just put some hotwheels stickers on it.

[SlipStrike1244]

finally got the tamiya gearbox and wheels which work great, but the assembly is extremely time-consuming and may be difficult.

[MadCow2357]

Getting T81 3 7/8 inch wheels from Banebots.com Do I need wheel hubs, or can I attach the wheels to the threaded rod without the hubs?

Also, I got a 1/8 inch threaded rod, but I realized how small the ball bearings with an inner diameter of 1/8" (outer diameter 1/4) would be on the frame, so I am trying to decide whether I should return the 1/8 threaded rod and get a 1/4 inch. It would bend less, and the ball bearings would be a more respectable size (around 1/2 outer diameter. This could just be the perfectionist inside me being a nuisance, but it bothers me.

1 inch by 1 inch wood is too thick for the frame, or am I wrong?

I need help... ... fast...

[shrewdPanther46]

Getting T81 3 7/8 inch wheels from Banebots.com Do I need wheel hubs, or can I attach the wheels to the threaded rod without the hubs?

Also, I got a 1/8 inch threaded rod, but I realized how small the ball bearings with an inner diameter of 1/8" (outer diameter 1/4) would be on the frame, so I am trying to decide whether I should return the 1/8 threaded rod and get a 1/4 inch. It would bend less, and the ball bearings would be a more respectable size (around 1/2 outer diameter. This could just be the perfectionist inside me being a nuisance, but it bothers me.

1 inch by 1 inch wood is too thick for the frame, or am I wrong?

I need help... ... fast...

1) you need hubs
2) dont buy a thicker size just because "it looks better", unless if your threaded rod is actually bending under the force of the vehicle, you have no reason to buy a new rod (i doubt it would bend in the first place)
3) 1"x1" is perfectly fine... theres no harm in having a slightly thicker frame because it will only be more sturdy.

[MadCow2357]

Getting T81 3 7/8 inch wheels from Banebots.com Do I need wheel hubs, or can I attach the wheels to the threaded rod without the hubs?

Also, I got a 1/8 inch threaded rod, but I realized how small the ball bearings with an inner diameter of 1/8" (outer diameter 1/4) would be on the frame, so I am trying to decide whether I should return the 1/8 threaded rod and get a 1/4 inch. It would bend less, and the ball bearings would be a more respectable size (around 1/2 outer diameter. This could just be the perfectionist inside me being a nuisance, but it bothers me.

1 inch by 1 inch wood is too thick for the frame, or am I wrong?

I need help... ... fast...

1) you need hubs
2) dont buy a thicker size just because "it looks better", unless if your threaded rod is actually bending under the force of the vehicle, you have no reason to buy a new rod (i doubt it would bend in the first place)
3) 1"x1" is perfectly fine... theres no harm in having a slightly thicker frame because it will only be more sturdy.

Thanks for the quick reply. I was told that the Buggy should be relatively lightweight, but I assumed the ball bearings would be about 1/2 inch wide when I bought the wood, since fidget spinner bearings are usually that size. I discovered though, that the bearings for 1/8 threaded rods were only 1/4 inches wide, and that is ridiculous. That is like the width of of esc key on the surface type cover I am using right now to type this reply. I wanted to use a more appropriately sized set of bearings, so I thought the bearings with a inner diameter of 1/4 and an outer diameter of 1/2 paired with a 1/4 threaded rod would be better (prettier, in my opinion).

[shrewdPanther46]

Getting T81 3 7/8 inch wheels from Banebots.com Do I need wheel hubs, or can I attach the wheels to the threaded rod without the hubs?

Also, I got a 1/8 inch threaded rod, but I realized how small the ball bearings with an inner diameter of 1/8" (outer diameter 1/4) would be on the frame, so I am trying to decide whether I should return the 1/8 threaded rod and get a 1/4 inch. It would bend less, and the ball bearings would be a more respectable size (around 1/2 outer diameter. This could just be the perfectionist inside me being a nuisance, but it bothers me.

1 inch by 1 inch wood is too thick for the frame, or am I wrong?

I need help... ... fast...

1) you need hubs
2) dont buy a thicker size just because "it looks better", unless if your threaded rod is actually bending under the force of the vehicle, you have no reason to buy a new rod (i doubt it would bend in the first place)
3) 1"x1" is perfectly fine... theres no harm in having a slightly thicker frame because it will only be more sturdy.

Thanks for the quick reply. I was told that the Buggy should be relatively lightweight, but I assumed the ball bearings would be about 1/2 inch wide when I bought the wood, since fidget spinner bearings are usually that size. I discovered though, that the bearings for 1/8 threaded rods were only 1/4 inches wide, and that is ridiculous. That is like the width of of esc key on the surface type cover I am using right now to type this reply. I wanted to use a more appropriately sized set of bearings, so I thought the bearings with a inner diameter of 1/4 and an outer diameter of 1/2 paired with a 1/4 threaded rod would be better (prettier, in my opinion).

Ye we are using 1/4 inch threarded rod, and i think the bearings are around 5/12ths of an inch wide, not sure tbh, but it really shouldnt make a difference. If you have like a lot of time until your next competition, theres no harm, but theres no real need to do thta.

[MadCow2357]

1) you need hubs
2) dont buy a thicker size just because "it looks better", unless if your threaded rod is actually bending under the force of the vehicle, you have no reason to buy a new rod (i doubt it would bend in the first place)
3) 1"x1" is perfectly fine... theres no harm in having a slightly thicker frame because it will only be more sturdy.

Thanks for the quick reply. I was told that the Buggy should be relatively lightweight, but I assumed the ball bearings would be about 1/2 inch wide when I bought the wood, since fidget spinner bearings are usually that size. I discovered though, that the bearings for 1/8 threaded rods were only 1/4 inches wide, and that is ridiculous. That is like the width of of esc key on the surface type cover I am using right now to type this reply. I wanted to use a more appropriately sized set of bearings, so I thought the bearings with a inner diameter of 1/4 and an outer diameter of 1/2 paired with a 1/4 threaded rod would be better (prettier, in my opinion).

Ye we are using 1/4 inch threarded rod, and i think the bearings are around 5/12ths of an inch wide, not sure tbh, but it really shouldnt make a difference. If you have like a lot of time until your next competition, theres no harm, but theres no real need to do thta.

Thanks a lot for all of your help. Just ordered the Banebots wheels, finally got something done today!

[808rain]

Can anyone please tell me what is expected to be in the practice log? Do I just pick any notebook? What information do I need to record? How many test runs need to be recorded? Thanks!

[SPP SciO]

Can anyone please tell me what is expected to be in the practice log? Do I just pick any notebook? What information do I need to record? How many test runs need to be recorded? Thanks!

For the best answer, refer to the rules (section 6). Requirements for max points are clearly listed.

From a practical standpoint, the log isn't just so you can get points on competition day, it's so you can calibrate your vehicle. Depending on how your vehicle works, some types of data may be more or less important.