2 speed transmission idea
 

ive been thinking of how to have a 2 speed transmission and figured to do so youd need to get two new gears (one metal and one plastic) at the proper ratios, then mount them on a sliding axel with about 2cm space in between, youd also need a thin pinion gear on the motor so only one gear touches at a time, about 1.5cm, have them in the normal position and they would move with two magenets, for the first gear a magnet would pull the metal gear pulling the plastic gear to the motor, and for second gear the magnet would repel the metal pushing it to the motor, and sliding the plastic gear behind the pinion (between the can and pinion)... its farfetched i know but its an idea to sit on.

btw the magnet i speak of would be near the differential in that area

When I was a kid many,many, many years ago I made a two speed transmission for a toy rc car. I never got it to work completely so I forgot about the project. As I got older I realized that an electric car would need a transmission for a different reason than a gas powered car. An electric motor produces maximum torque at or near zero rpms. A gas motor usually produces peak torque somewhere within 60-100% of peak rpms. Good luck if you continue to pursue the project. BTW it would have to be an automatic transmission because there would be no way to shift gears remotely with the xmods 2 channel transmitter.

but you could have it manual, take a spare zz or bit or buy a clone, extend the range as much as possible and set it that foward gives an electromagnet juice and backwards gives it opposite polarity... i suscribed at some site for a free xmod, if i get it ill use as an experamentee for fets and ect...

yeah i had that electromagnet idea a while ago but there's just not enough juice in it to pull the gears in to synch up... best to get a hardwired motor off of a clone and use that, hopefully i'll have a redesign ready or a prototype ready soon... haven't worked on it in a while now....this will be interesting

why not remount the Hi Lo trim button?

Why not build a spinning clutch, I.E., when the motor spins faster, the gears move outward, switching gears. A CVT would be way cooler though.

Well if Bits or Micro RC car (1/64th scale) cars have 2 speed's or a boost function, why couldn't an Xmod. There pretty much the same just at a different scale.

ok I understand, so do zipzap SE's have ESC?

Why not have the magnets be powered by your motor wires? the more power (speed) the more the magnets attract the gear, to switch them, then less power (force) and it repels the gear, switching back to first

find any rc cars two speed gearset and tear it apart and figure out how it works then build one that will fit an xmod.

It could be done just go to HPIracing.com and look for the 2speed trans for electric cars in the instruction area.You will see a simple clutch setup in the picture.

hpi

yeah, hpi makes some of the best automatic 2 gear transmissions out there for RC Cars

here's a picture from hpi:

Somehow I don't think that tranny will fit.

im offering a $15.00 painting job. i will paint any xmod for $15.00. even the body parts and kits if u want. u just need to email me at sledgehammer927@hotmail.com

just tell me the color and i will use them. i have a paint booth, air brush, lots of paints, and now i am working on a $150.00 plastic model jet.

i will also fix anything u need to have fixed on the xmod. glue body parts, soder wires, fix chips, soder extra battery packs for longer lasting, anything. i am always fixing my naybors car because he always breaks it. i recently just painted his 350 red with a silver hood and a blue stripe down the center. so just email me if u want anything done to or for your xmod. for ony $15.00 bucks plus shipping.

Spammer!