TinyRC.com - 4.5v Zipzap Dragster!!!

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- - 4.5v Zipzap Dragster!!! (http://tinyrc.com/forums/showthread.php?t=3768)

Quote:

Originally posted by charliebrown
I am VERY insulted.....is there a reason no one has replied to this thread in over a MONTH??? DON'T TEST MY PATIENCE!!!! lol ok maybe I was a li'l bit too angry sorry :D :D :D

Sorry! I've been super busy lately, :)
Sorry about the step by step, But if you can't follow the website This mod might not be for you, If you have specific questions I'll be glad to help! Good luck!

I think I understand it, if you send a negative battery curent to the endbell of the ZZ motor and the positve to the shaft, then it spins foward, right? NOW i understand......I gotta install that on my car, and race people for pinks LMAO

hey did u use a NPN or a PNP transistor for? i'm thinking NPN am i right?

http://members.shaw.ca/dabigpig/layout.jpg

Quote:

Originally posted by dabigpig
hey did u use a NPN or a PNP transistor for? i'm thinking NPN am i right?

http://members.shaw.ca/dabigpig/layout.jpg

I believe you are right NPN sound right, You can do a search on "2n2222 +pdf" on google and check the datasheet, my plug in is not working so I couldn't verify this!

Notice that the positive of the 4.5 battery pack goes to the motor. and the negative on the motor does to the collector (c) pin on the transistor.
I keep forgetting to label and use the right colors!

Uhh, I took a 12 volt camera battery and tried to put it on my Zip. the wheels spin like Crazy, WOW! Oh well, If I used the NX motor and that 12 volt, along with KIT gears, VROOM.:o

[Namuna edit: nasty comments removed]

Re: Re: 4.5v Zipzap Dragster!!!

Quote:

Originally posted by wild03
Damn YOu do get what you pay for, My site is locked because it exceeded the data transfer limit....What does one has to do to find some GOOD free service in this life! :(

Want good free service?
Go to www.freeservers.com and get their free pakage...
I use it all the time.

Thanks for the info Maxxer ;)

The CD rom motors are usually brushless, so no bannanas. You would need a brushless controler, and those are @#$@# expensive.
I personally would try a Didel coreless motor or a N20(smallrc.com, I love their site. Propo RX's for bitchargers, batteries....all the goodies). Although about 7 bucks each, the N20's are designed to handle more current than the coreless, which would still be an improvement over the standard motors. I might use a off-brand N20, though, as they are dirt cheap and common as heck.
The idea with the transistors is a good one, but I intend to just shell out the 13.50 USD for a FET mod. The performance should increase even more, and the efficiency should go up about 20% instead of dropping.
I would go with 1 or 2l Li-Po's if I were going to make a drag-cart. Each Li-Po delivers a full 3.7 volts, which is plenty with a FET mod. Moreover, they have a shade higher mah-to-weight ratio, so a 210 Li-Po (at 3.7 volts) is about 1.5 grams heavier than a 150 NiMh (only 1.2 volts.
Of course...a .010 engine might work in one of these....but it would go so fast you could'nt control it!