How about 2-speed on Rampage

[Martin]

After some little drawing and some brainstorm, I've put the the drawing on real part, this is not a real working two speed unit, but I plan to make it working for later.


The only downside with the concept is I think it's too much exposed out of the body, ex: for bad landing, or hitting something, etc......


Good thing is I will be able to use any imaginable combination of gearing ratio available from redcat or MCD, primary ratio, first ratio, and second ratio.


Here a pic of the design......

 

[Obeast44]

Damn man im impressed! Does your mind ever rest? It seems like you have so many good things going on at once hehe

 

[hamster huey]

Im positve you can make a metal guard for that. You wouldnt even have to weld it. You could get thick self tapping screws a la side dom. I never thought of making the 2 speed that way. How much do you figure it would cost?

 

[Martin]

Obeast: This is a way to make thing move for better, I can't sit with an empty mind, I work at home all day long for almost all the time of conversion projects in 1/1 car, diesel conversion in westy camper, I also do myself custom chip tuning, so.....I am always taking me dig the meninges to find a solution to built something or to fit something.


As for the price, due to the fact that I plan to use the factory and MCD gear, the price should be low, (material cost, some bearing, and the worktime)

 

[IMADMAN]

LOL!!!! I'd be interested! Hopefully this one will be more readily available the the Baja 5B 2 speed.

 

[rob64n]

i was thinkin if you want to keep from excess overhang of the gears to put the 2 speed part on clutch bell shaft that way the d shaft stays the same, but you would have a plate over the clutch bell gear and spur gear with bearings on both shafts for support so the shafts don't flex causing the gears to strip.

 

[Martin]

Yep, Baja 2 speed is like a neverending story........


I can put the gear on clutch shaft, but I will have to put the one way bearing on the B shaft, it will not give enough space for another gear on that shaft to drive the D shaft.


An external plate with bearing is an idea also.

 

[rob64n]

the plate would definately stop the flex that i have on the middle shaft that's why i go through so many gears on that shaft

 

[fastlane]

I would like a 2 speed. When you get it going are you planning on selling a few of these?

 

[Hampel]

There is a company making that for the 5b...Cant wait

 

[Martin]

I will first built two of it, 1 for me and another for my friend, and as soon as the snow melt completly, we will test how that thing work, and for sure to burn several and several tank of fuel on both Redcat before planning to sell some to other.

 

[cjjeepman]

2 speed


Put me on that list .i will take one for sure

 

[bbuzzard]

Ditto on that!!

 

[Martin]

Well, I received the Hardened steel gear today, they are very hard, imho they are indestructable, even with a poor mesh....... I'm almost ready to make the 2 speed, As soon as I receive the needed tool, bearing etc.. I'll start to work on that.



/monthly_2010_06/583c605dafb53_rampagegear2speed.jpg.9b17a87b4776432277ebdff990584202.jpg

 

[bbuzzard]

Nice...keep the updates coming!!

 

[forist]

where did you get the gears from?

 

[wurthman]

Have a look here, this guy is doing the same thing.


http://www.largescaleforums.com/showthread.php?t=7913

 

[Martin]

Gear can be found here, but be carefull what gear you buy, there is different gear carrier on MCD: http://www.gotpetrol.net/steel-gears-vt4838.html


As for the 2 speed, I will make it differently, I don't know what he have make for the clutch bell shaft to make it longer? I don't want to make a new clutchbell with a longer shaft.


With the Redcat with his 3 pieces ''D'' shaft, I can fit the two speed on that shaft with a longer one, a very basic part to do in 10min, wich is almost impossible on a MCD since the ''D'' shaft is one piece with the pinion gear.


In fact, all is possible, but how much work time and how much $$$...

 

[DanSpd]

2speed should be easy to make since it exist for nitro cars.


It's just a matter of how to make it on big cars.

 

[Martin]

Like you said, it's not too complicated to reproduce.


For 1/5 RC, a two speed already exist from FG since a long time, and newly for HPI 1/5.


Imho the best two speed ever is the one from Team losi 1/8 lst, lst2, xxl.......... I played a lot with this losi truck (6 in total) before to move to 1/5 scale, they work with a centrifugal clutch pad system and a cam lobe (flat cut) on the layshaft to lock the clutch firmly when the pad start to grab inside the drum, no possible slippage on power, and a very smooth transition from 1st to 2nd.


The only downside is you have to replace the pad and drum often, specially combined with a big or ported motor.