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NCD High Performance Carbon Fiber 2.2 Shafty/Sportsman Chassis
- Thread starter Tomy
- Start date
I was informed yesterday that some of my AX10 4-link plates have the flat head screw countersinking on the wrong side of the plate. If you have received a faulty plate, please pm me with your shipping address and I will send you a new plate immediately.
I apologize for any trouble this may cause you.
Tomi
I apologize for any trouble this may cause you.
Tomi
I have done some fine tuning of the transmission during the weekend. I also took the tranny on a weight loss program. I even experimented with plastic and alloy gears but have not had satisfying results with that yet. It would be cool to install 7075 gears at 2g/each. Stock are 7g. 
I ended up the traditional route and drilled out the gears to save 2g/gear. Thats about 27% off stock weight of each gear. I also made a thinner front plate for the housing loosing another 1.3g.
With alloy hardware and drilled out gears final weight is at 43.5g.
I also finished the general purpose unit. While the Sudu One FL specific version needed to be as low as possible, I set out to make this unit as narrow as possible. This brings with it a slight increase in height. Overall width with a standard size 540 motor and 17 pinion gear is 53.5mm. The transmission only is 50.5mm wide.
Weight of this unit is 42.5g with drilled gears and alloy hardware. This unit will fit all Sudu One versions except for the FL chassis. The FL unit has a lower cog due to the gears sitting lower in the housing.
I ended up the traditional route and drilled out the gears to save 2g/gear. Thats about 27% off stock weight of each gear. I also made a thinner front plate for the housing loosing another 1.3g.
With alloy hardware and drilled out gears final weight is at 43.5g.
I also finished the general purpose unit. While the Sudu One FL specific version needed to be as low as possible, I set out to make this unit as narrow as possible. This brings with it a slight increase in height. Overall width with a standard size 540 motor and 17 pinion gear is 53.5mm. The transmission only is 50.5mm wide.
Weight of this unit is 42.5g with drilled gears and alloy hardware. This unit will fit all Sudu One versions except for the FL chassis. The FL unit has a lower cog due to the gears sitting lower in the housing.
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douwe
Rock Crawler
That's great work tomi. Once I have my gears, I ship them, with a little present, to Finland
Sent from my HTC One X using Tapatalk
Sent from my HTC One X using Tapatalk
musta
Rock Stacker
Love both versions. I hope my bad times will come to an end soon. You Make me want to put my rig on the slab!
I wish all the best for you, Tommaso!
A few last changes to the skid plate were made today and this is how it shipped out to testers.
With the addition of one extra mounting hole to the skidplate, the transmission can be mirrored in all possible ways - endbell facing forward or towards the rear and with the motor on either side. Any combination is possible with one skid plate.
I also made a 1.5mm thick shim plate in case you will need to adjust the height of your transmission. Why not use simple M3 spacers between the skid plate and transmission you may ask? The weight of the motor causes a lot of leverage on the transmission mounting and the use of spacers only would put a lot of stress on the two M3 screws and thin alloy cross members in the transmissioin. Fastened with a full width shim, the transmission is supported along the full width of the housing and mounting screws and alloy cross members face much less stress.
With the addition of one extra mounting hole to the skidplate, the transmission can be mirrored in all possible ways - endbell facing forward or towards the rear and with the motor on either side. Any combination is possible with one skid plate.
I also made a 1.5mm thick shim plate in case you will need to adjust the height of your transmission. Why not use simple M3 spacers between the skid plate and transmission you may ask? The weight of the motor causes a lot of leverage on the transmission mounting and the use of spacers only would put a lot of stress on the two M3 screws and thin alloy cross members in the transmissioin. Fastened with a full width shim, the transmission is supported along the full width of the housing and mounting screws and alloy cross members face much less stress.
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douwe
Rock Crawler
Can't wait to receive my tranny..... 
Long shaft is in the house, Only the r2 gears.... (but i have to send them to you first tomi)
Long shaft is in the house, Only the r2 gears.... (but i have to send them to you first tomi)
Oz Bruiser
RCC Addict
Agread. Cant wait to get. My donar R2 sitting on the bench waiting.
Fine tuning sounds great Tomi
Sent from my GT-I9300 using Tapatalk
Fine tuning sounds great Tomi
Sent from my GT-I9300 using Tapatalk
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ZZR 1100 Racer
Stephan Hauser / # 7
...Tomi did't stop searching for new detailed solutions and opportunities for improvement"thumbsup" I think the shim plate could also very helpful for the people who are interested to get the universal custom transmission housing for easy fixing in their chassies.
Great Job, Tomi"thumbsup"
Great Job, Tomi"thumbsup"
Haastnooit
Rock Crawler
Awesome work Tomi "thumbsup" Great improvements to make the tranny more versatile .... I LOVE IT .... can't wait !
On the gear mods -- what do you think? Couldn't we narrow the gears since they're probably overkill on strength, and thin the "web" below the teeth instead of drilling it? Cross section kinda like an I-beam. It would be a U-shape groove under the teeth both sides, if that helps explain it. Your hole pattern would be stronger if there were thrust forces, but there aren't. So the thinned web might have the advantage for rotational forces. All just speculation.
Have you taken the opportunity to compare the gearing of the new tranny to the AX10? For example, I think I use a 14/90 on pinion & spur. Is there a pinion that will give me the same overall reduction on the new one?
Have you taken the opportunity to compare the gearing of the new tranny to the AX10? For example, I think I use a 14/90 on pinion & spur. Is there a pinion that will give me the same overall reduction on the new one?
I dont know the exact gearing of the R2 gears or how they compare to the AX10 transmission.
But I asked Totorax for advise on what to run with a 35t motor and he told me he is using a 17t pinion. I have used that while drawing up the transmission. There is room to use a smaller or bigger pinion gear.
You guys will have to test and report back on what works.
To lighten the gears by cutting a circle U-channel would probably work but is much slower for me. Drilling them only takes a few minutes.
I am still hoping to be able to make 7075 alloy gears at 2g/each. :mrgreen:
But I asked Totorax for advise on what to run with a 35t motor and he told me he is using a 17t pinion. I have used that while drawing up the transmission. There is room to use a smaller or bigger pinion gear.
You guys will have to test and report back on what works.
To lighten the gears by cutting a circle U-channel would probably work but is much slower for me. Drilling them only takes a few minutes.
I am still hoping to be able to make 7075 alloy gears at 2g/each. :mrgreen:
Haastnooit
Rock Crawler
I got this off the RC4WD website ...
Gearing :
8T pinion = 30.4:1, 9T pinion = 27.0: 1, 10T pinion = 24.3:1,
11T pinion = 22.1:1, 12T pinion = 20.3:1, 13T pinion = 18.7:1,
14T pinion = 17.4:1, 15T pinion = 16.2:1, 16T pinion = 15.2:1,
17T pinion = 14.3:1, 18T pinion = 13.5:1, 19T pinon = 12.8:1,
20T pinion = 12.2:1
link: R2 Crawler Transmission V2
Gearing :
8T pinion = 30.4:1, 9T pinion = 27.0: 1, 10T pinion = 24.3:1,
11T pinion = 22.1:1, 12T pinion = 20.3:1, 13T pinion = 18.7:1,
14T pinion = 17.4:1, 15T pinion = 16.2:1, 16T pinion = 15.2:1,
17T pinion = 14.3:1, 18T pinion = 13.5:1, 19T pinon = 12.8:1,
20T pinion = 12.2:1
link: R2 Crawler Transmission V2
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Okay then, doing the math, Axial says the AX10 tranny is 2.6. I think the stock spur is 89. So the overall ratio is 231/pinion. For a 14T pinion = 16.5. Close to the R2 tranny at 15T pinion. So use maybe one tooth more than you're used to.
Haastnooit
Rock Crawler
Correct stock Axial spur would be 87T "thumbsup"
ZZR 1100 Racer
Stephan Hauser / # 7
I'm sure you could do that, Tomi:mrgreen:
