"Carbon Fever" LCC MOA

[Mike Poulson]

Got to run the new gears today, it's a whole new rig

[motorman1600]

Nice, Now I have to buy another MOA kit.

[paystin]

Originally Posted by motorman1600

Nice, Now I have to buy another MOA kit.

PM sent

[the kil]

how do those slippers work for you?

[toy4crawlin]

WOW holy smokin
Thats what I'm talking about ! yeaa very cool

Great idea


Awesome just awesome

[Mike Poulson]

Originally Posted by the kil

how do those slippers work for you?

The slippers work good, it is kinda weird on a MOA. I have them locked down to see if I can break the gears. At 2.00 a gear I can afford to experiment a little.

[the kil]

wouldn't the slip keep you from frying motors and electronics though?

[Mike Poulson]

Originally Posted by the kil

wouldn't the slip keep you from frying motors and electronics though?

I don't think so, slippers in crawlers help reduce broken parts.

[Mike Poulson]

Well some interesting results;

I went from 9t x 20t 32p MOA gear set which is 2.22:1 to a 12t x 28t 48p MOA gear set which is 2.33:1 right?

My wheel speed went from 440 rpm to 483 rpm.
The best description I can come up with is it feels zippy and sounds like a 2wd buggy.

[jrh24054]

That is the coolest thing I have seen yet.

[motorman1600]

So, why did the wheel speed increase instead of decrease?? Higher the number , the lower the speed. Could there be a mathematical equation error when going from 32 p to 48 p gears ????
If you had a motor turning 100 times, the 2.22 set would turn 45 times. The 2.33 set would turn 42.9 times. The math is correct, but what else did the modification change? Lower friction? Higher HP from the motor? Very interesting to say the least.

[davec]

I would guess that 48p gears are more efficient than 32p gears, resulting in the increase in RPM's. That's the one thing I don't care for in my Losi MOA rig, the 32p gears. Even with the gear mesh perfect, they are still noisy and wear on themselves pretty quickly.

[Mike Poulson]

Originally Posted by motorman1600

So, why did the wheel speed increase instead of decrease?? Higher the number , the lower the speed. Could there be a mathematical equation error when going from 32 p to 48 p gears ????
If you had a motor turning 100 times, the 2.22 set would turn 45 times. The 2.33 set would turn 42.9 times. The math is correct, but what else did the modification change? Lower friction? Higher HP from the motor? Very interesting to say the least.

I ran a couple more packs at Black Rock and 1 thing is for sure everything changed. I want more of this kind of change!

I am thinking the worm drive gear could be made on a thread cutting lathe,
perhaps out of plastic of some kind. Hint hint doesn't someone have a new lathe hint hint.

[motorman1600]

Yes , But you are asking for a miracle for me to cut a gear.
Anyway, Is there any way you see to lower the ratio any further? larger spur gear? Smaller pinion gear? I would like to try the MOA with this type of set up and a dual esc and a novak dig switch. But I think the speed can come down and the torque can go up. Maybe a higher wind motor?? What do you think???

[frdtrkguy]

Could we get a parts list on your slipper set-up? I wanna try it

[Mike Poulson]

Originally Posted by motorman1600

Yes , But you are asking for a miracle for me to cut a gear.
Anyway, Is there any way you see to lower the ratio any further? larger spur gear? Smaller pinion gear? I would like to try the MOA with this type of set up and a dual esc and a novak dig switch. But I think the speed can come down and the torque can go up. Maybe a higher wind motor?? What do you think???

Isn't the drive gear just a screw? Simple thread cutting lathe should do it, when you figure it all out tell me how.

The 22t 550 is close to perfect but a lower ratio will probably only improve it. There is a ton of wheel speed that just kind of gets wasted. I think you may be correct that higher wind would be worth testing. 1 more turn on a 550 arm is a pretty good length of wire.

Originally Posted by frdtrkguy

Could we get a parts list on your slipper set-up? I wanna try it

Well here is the parts list;
1- Associated 9360
http://www3.towerhobbies.com/cgi-bin...?&I=LX3222&P=7
You can also use the Axial idle gear.
Everything else is home brew.

Something to try would be using the stock LCC slipper gear assembly.
Looks like you could drill a hole in the end of the worm drive gear and extend the flat spots, and off you go. If I had a spare drive gear I would try it but I don't right now.

Mike

[all show]

this thing is amazing mike, definately innovative thinking going on. on the drive gear if it is just a thread all you would need is the thread pitch , major and minor diameter and you could make it but it would have to be a normal thread shape to use a standard threading insert or you would have to have a special ground insert for the right shape . just found a pic of the worm drive and it would have to be more like a groove tool which is not a big deal

[Mike Poulson]

Originally Posted by all show

this thing is amazing mike, definately innovative thinking going on. on the drive gear if it is just a thread all you would need is the thread pitch , major and minor diameter and you could make it but it would have to be a normal thread shape to use a standard threading insert or you would have to have a special ground insert for the right shape . just found a pic of the worm drive and it would have to be more like a groove tool which is not a big deal

Thanks all show, looks like 14.2 tpi. I can do 14tpi on my machine. I think I will shape a bit to fit and give it a try.


Mike

[Mike Poulson]

Well, I got the bit ground and figured out how to cut threads. 14 tpi is not enough and 16 tpi has too many and I don't have the set up for 15 tpi.

[motorman1600]

Mike, Could it be metric threads??