extended wheelbase bit showroom - Page 2

dustn · #16 02-10-2003, 01:10 AM

do you have a pic of the car with the body off?

chelboed · #17 02-10-2003, 01:13 AM

Quote:

Originally posted by dustn
Well, no I havent completed the front end yet, but I think I'll work on it some more tonight after I finish homework. Weight is lower compared to a normal dual cell just because there is less plastic on the chassis, but I do not know if it is appreciable. I think my 40mah batteries will be here from allelectronics soon, so they will go on there instead of the 1/3aaa's. I plan on using 4 total, 2 80mah sets in series to make 2.4v and 80mah. They are lighter and hopefully they will allow the pcb to be under the top of the body. The charger I am using charges in about 5 minutes, with the cells just slightly warm. I hope it will charge nimh just as well as it does nicd. The only thing I am concerned about at the moment is the ratio of the kit gears. With a 2.6, they are very slow starting. I'd like to mod the pcb to give more current, but Its from a clone, so I would have no idea where to start. More to come later.
By the way, the explorer looks good.

You may be dissapointed with the button cells from allelectronics. A standard 2 cell mod even with the added weight is hotter than the Layman3 cell. (at full charge even)

The clone pcb puts out quite a bit of current anyway. It smokes the microsizers and Bit's pcb's.

dustn · #18 02-10-2003, 01:17 AM

Really? hmm... Damn. Well maybe i'll just do single cell and R-spec. I'm gonna experiment tho. Thanks for the heads up. Now if it doesnt work very well I wont worry that it was something I did.

dustn · #19 02-11-2003, 10:19 AM

Ok, I am doing some 3d modeling for the bit pan car. I have modeled the motor, pinion, rear kit wheels, and tires. I'm workin on the rest in the mean time. After this is all modeled and built, I'll make blueprints, so anybody with some knowledge about how to read prints and make small parts should be able to follow. For those interested, I am using SolidWorks 2000. My avatar shows a rendering of an assembly with the motor and pinion.

Spanky · #20 02-11-2003, 10:44 AM

solidworks... i will have to check that out. i have been buried in the autocad world for years. but am trying to get into Maya. but i would be interested in your prints. i have myself been working on creating drawigns of bodys, and car parts in acad. but have been busy so not much has been done with it. good luck with your modding..

chelboed · #21 02-11-2003, 11:15 AM

Quote:

Originally posted by dustn
Really? hmm... Damn. Well maybe i'll just do single cell and R-spec. I'm gonna experiment tho. Thanks for the heads up. Now if it doesnt work very well I wont worry that it was something I did.

The Layman tri and dual is much better than a single cell, though. I would recommend it if you don't want to do the std dual.

dustn · #22 02-11-2003, 11:49 AM

The greatest thing about solidworks other than the ability to do precise 3D assembly (those who have used 3D studio MAX will appreciate the ability to position stuff right) is that it will make a detailed 3 view line drawing from your 3d model. It will also do isometric line drawings, and almost anything else. Then you can add dimensions, notes, bill of materials (does this for you automatically as well), etc. The first summer that I worked a Precision Cutting Systems, I used acad for drafting, but they went to solidworks, and not only is it easier to draw in, but it makes designing much much easier... I have been using it for the last 2 years, and had prior drafting experience, but it is easy to learn for anyone with a little cad or 3d experience. Email me for info if you are interested in solidworks...

dustn · #23 02-11-2003, 04:16 PM

Here is what I have so far... The axle support in the rear and the clip that holds the motor will be all one peice, bent to shape. The chassis will be plastic, because it is cheaper and easier to work with. The carbon fiber just looks cool rendered. On the real thing i think i want to use tomy pullback wheels, front and rear. I just modeled the KIT wheels cuz thats what I have.

dustn · #24 02-12-2003, 12:16 AM

Another... I calculated gearing for a 6t pinion and 23t spur, 3.83:1 which is close to kit gearing but since the rear wheels will ultimately be smaller, the distance per revolution will be less, so its an effective lower ratio, something to the tune of 4:1 in comparison to a bit with normal rear wheels.

dustn · #25 02-12-2003, 03:03 AM

oops, I changed my mind on a few things. The axle bracket will be separate from the motor clip, and will be aluminum. The motor clip will be spring steel. After trying to make one, I realized that the brass is not springy enough to hold the motor correctly. I also changed the motor orientation. More to come, but sleep comes first.

dustn · #26 02-13-2003, 01:40 AM

Here it is on my desk. The motor clip and axle bracket are their new respective materials.

Swavey · #27 02-13-2003, 02:15 AM

That looks really sweet dustn!!!
keep us posted, I wanna see howr gonna set up everything else...

then.................build it, heh

Very nice work!