Transmissions

[mack kid]

I e mailed him and he gave a great response and info. i gave him the forum info and told him to join and share his build. its designed to fit into trucks in replace of tamiya 3 speed.

[grumpygrady]

Originally Posted by mack kid

I e mailed him and he gave a great response and info. i gave him the forum info and told him to join and share his build. its designed to fit into trucks in replace of tamiya 3 speed.

wow with just a little work that would look just like a engine and transmission lol

[mack kid]

I will post some more pics but motor is inside trany

[mack kid]

This is his e mail to me. i hope he joins or at least tells which forum build is on. Ratios are
high 1st 8.25 2nd 6.83 3rd 5.27
med 13.75 11.39 8.79
low 25.13 20.08 16.06

hope this helps

Hi Don,

The 9 speed was designed to fit into Tamiya a chassis replacing the 3 speed. it is the same overall length as the 3 speed, slightly narrower so it fits in between the rails with ease (unlike the 3 speed) but it is much higher owing to the larger number of internal shafts. It should fit inside a sleeper cab with no problem (with some moving around of radio gear, batteries ect), It will require two servos to shift. Day cabs will require the back wall of the cabin to be cut out so the box can extend trough. How much it extends through depends on where it is mounted on the chassis. if carefull repositioing of the front servos is done and the box moved further forward the transmission can sit in almost the same position as the engine and trans in the full size truck.

As shifting is concerned i would forsee that the 9 speed would essentially be shifted by selecting a range (high, mid, or low) with the right stick on the control in the vertical plane (right horizontal of course being steering) and then shift the gears 1st, 2nd and 3rd as normal with the left stick on the control in the horizontal plane, only changing ranges as the overall situation requires, rather than starting in 1st / low and shifting all the way through all the 9 gears to top. So in some situations you would start in High range / 1st and not even look at the 6 gears below that. In a crawling situation you may decide Low range is suitable and then start in either 1st, 2nd or 3rd and the same for Mid range. Chose a range then choose a gear. Having said that you can also start in low range and shift up through the ranges to high range selecting 1st, 2nd or 3rd at the same time. Almost endless possibilities.



The prototype. A production box would have helical gears on the motor's
primary reduction rather than the spur gears shown here.

The transmissions have a aluminium casing, steel pinions and countershafts, bronze cluster gears, steel syncronizers and more than 20 ball bearings. Supplied with a RS540 or RS555 motor. All gear shifting can be done on the go. Requires two servos to shift. Lubricated by automatic transmission fluid.


Price...???
This is a high end product for the scale model purist, not for the budget modeler....esentially a custom one at at time hand made gearbox. It is not a mass produced off the shelf item. It's cost will exceed the cost of the entire truck x 2. It will however be backed up with individual technical assistance to get each transmission working in the customers vehicle rather than the buy it and go away and die attitude of the manufacturers of the off the shelf gearboxes (which i hear have problems). Cost: $1250.00 AUS. If a customer is unsatsisfied with the transmission i will purchase it back from them for it's original sale price.


The 9 speed at this point is at a crossroads. The developement stage is completed, what is required now is enough interest given the high cost and small market to be shown to justify the expence of getting a large number of gear blanks produced (as the gear cutters have a minimum order number). Currently i have enough blanks to produce only one more transmission. If gear blanks were cut individually this thing would cost a million dollars..

I hope i have been informative.
Please feel free to ask any further questions.


Best Regards
lyle.

[Aero 9000]

Originally Posted by mack kid

I e mailed him and he gave a great response and info. i gave him the forum info and told him to join and share his build. its designed to fit into trucks in replace of tamiya 3 speed.

So what are everyones thoughts on the 9 speed transmission..??

Is it a matter of "there is no need for it".....???

That is a dangerous argument, as there is "no need for" almost everything that gets bolted on to a RC truck, like headlights, tailights, sound systems, springs, shock absorbers, smoke generators, mirrors, exhausts, fuel tanks, ect, ect, ect....

Is there anyone that would have one, or will people wait till the big manufacturers offer it, like RC car enthusiasts did with suspension ......???

[JAMMER]

This transmission cost 1250 AUS or $ 1347.34 US you can do a 8 speed for about $500 US or a 6 speed for about $355.31 US all aluminum cases and all metal gears. Ed