Lazer zxr

[alcyon]

Originally Posted by Welshy40

Depth wise the two carbon fibre plates will be 2mm thick and will show pics when I get it built correctly next week.

I have the B4 items already and will have to make the centre hole bigger on the spur gear to match the B4 spurs as RW will be unable to make me 100t version until the first week of April. Send me a PM with your address as I can send you a new my spur gear (my version) so at least you can use that until we get the new spur.

hmm, that gearbox sounds good, but it also sounds like the gearbox will be exposed, i wonder if you have a plan to cover the rear belt or perhaps you plan to leave it exposed like touring cars?
About the RW spur, that actually sounds good. if read you right, that means the current spur is 4mm? All i have to do is ream or drill the spur to 4.7mm and it will fit good. I have just done revising my drawing again as i find that the optima mid shaft is a little under the perfect diameter of 4.7mm, its 4.6 so my spur is sitting a little bit offset, i actually have to push it nicely to get it completely concentric. its acceptable on the optima mid cause i can just place some kind of tape to cover the shaft, but for the Lazer i am changing the drawing to a perfect 4.7mm. I really hope the machinist will be able to make a perfect fit like the original B4 shaft. otherwise maybe no need to remake the RW spur at all, why not just leave it as it is at 4mm, and let each user ream the hole themselves?
Of course that is one option so that we can use up all the current RW stock. Also could you send me one additional used spur to give to my friend ? That one does not have to be perfect, perhaps something that you consider not good enough for you to use in a race. sending you an email now.

Also another ZX question, i am now considering rebuliding my ZX, and it has the original fiberglass chassis. i wonder how strong is this chassis compared to the graphite. i snapped my optima mid graphite chassis and i dont want to snap my ZX fg chassis. i am going to use the fibreltye top deck.

[Welshy40]

Originally Posted by alcyon

hmm, that gearbox sounds good, but it also sounds like the gearbox will be exposed, i wonder if you have a plan to cover the rear belt or perhaps you plan to leave it exposed like touring cars?
About the RW spur, that actually sounds good. if read you right, that means the current spur is 4mm? All i have to do is ream or drill the spur to 4.7mm and it will fit good. I have just done revising my drawing again as i find that the optima mid shaft is a little under the perfect diameter of 4.7mm, its 4.6 so my spur is sitting a little bit offset, i actually have to push it nicely to get it completely concentric. its acceptable on the optima mid cause i can just place some kind of tape to cover the shaft, but for the Lazer i am changing the drawing to a perfect 4.7mm. I really hope the machinist will be able to make a perfect fit like the original B4 shaft. otherwise maybe no need to remake the RW spur at all, why not just leave it as it is at 4mm, and let each user ream the hole themselves?
Of course that is one option so that we can use up all the current RW stock. Also could you send me one additional used spur to give to my friend ? That one does not have to be perfect, perhaps something that you consider not good enough for you to use in a race. sending you an email now.

Also another ZX question, i am now considering rebuliding my ZX, and it has the original fiberglass chassis. i wonder how strong is this chassis compared to the graphite. i snapped my optima mid graphite chassis and i dont want to snap my ZX fg chassis. i am going to use the fibreltye top deck.

I only have new spurs, which cost me £5 each, so will send you 2 and your friend can sort you out with some money which can go towards the overall cost of the shaft your doing for me (I hope I make sense).

Chassis in GRP is flexible and my own opinion is not as strong as carbon fibre.

Spurs I guessed so cant confirm what size difference there is in the middle hole of the B4 and kyosho spur. I will measure the spur I am sending you and update you later on today.

My gearbox design is based lightly on the ZX-S design and will be an exposed gearbox. Its really down to how dirty the area is your racing on and if you want to cover it I cant see it being to difficult to do with either plastic or heat shrink (if you can find a big piece). Personally I wanted it exposed as you will be able to see the standard of the rear belt and in my design I am adding a tensioner at the very top over the layshaft pulley as well as below in the under side middle to give tension to the belt. The little tiny holes above the bearings are for a washer specifically made to hold the bearings in. The holes should now make sense on my picture. Plus with these lovely blue belts and all the blue bling I currently have on my car this will look superb!!!

[alcyon]

Originally Posted by Welshy40

I only have new spurs, which cost me £5 each, so will send you 2 and your friend can sort you out with some money which can go towards the overall cost of the shaft your doing for me (I hope I make sense).

Chassis in GRP is flexible and my own opinion is not as strong as carbon fibre.

Spurs I guessed so cant confirm what size difference there is in the middle hole of the B4 and kyosho spur. I will measure the spur I am sending you and update you later on today.

My gearbox design is based lightly on the ZX-S design and will be an exposed gearbox. Its really down to how dirty the area is your racing on and if you want to cover it I cant see it being to difficult to do with either plastic or heat shrink (if you can find a big piece). Personally I wanted it exposed as you will be able to see the standard of the rear belt and in my design I am adding a tensioner at the very top over the layshaft pulley as well as below in the under side middle to give tension to the belt. The little tiny holes above the bearings are for a washer specifically made to hold the bearings in. The holes should now make sense on my picture. Plus with these lovely blue belts and all the blue bling I currently have on my car this will look superb!!!

ok understood you about the cost. i wonder if your new gearbox design will work on my old ZX. i just tried building up my ZX and found a few essential missing parts. i need the 1 belt roller and the pin for it that goes under the rear diff. is it LA-10 ? does it come with the little pin for it?
to complete the car i would have to buy WBD-1 for the ball diffs, then a front and rear fibrelyte shock towers, new 62.5mm CVDs all around, perhaps a new ZXS body and big bore shocks much later. Of course the new slipper shaft and the B4 parts to complete the drive train, should be super ! more avenues for me to dump whats little i have of m money !

[Welshy40]

Originally Posted by alcyon

ok understood you about the cost. i wonder if your new gearbox design will work on my old ZX. i just tried building up my ZX and found a few essential missing parts. i need the 1 belt roller and the pin for it that goes under the rear diff. is it LA-10 ? does it come with the little pin for it?
to complete the car i would have to buy WBD-1 for the ball diffs, then a front and rear fibrelyte shock towers, new 62.5mm CVDs all around, perhaps a new ZXS body and big bore shocks much later. Of course the new slipper shaft and the B4 parts to complete the drive train, should be super ! more avenues for me to dump whats little i have of m money !

The gearbox design will work with the zx but you wont be needing those pins and brass bushings with my design.

[alcyon]

I just came back from the machinist. He says he may have trouble making the spline slots becuase they are too small for his machines. He also told me he had to do the B4 side manually becuase it was too small for his CNCs. I know you might ask me, why not go to another machinist? Well i work as a design enginneer at a machine making company, and this guy is one my workplace suppliers, and i find his company to be reliable and keeps his promises and at reasonable cost. Of course i could try asking other places but i suspect the answer will be the same. You see most of the industry in malaysia is in medium to heavy industries, so i doubt there are any who make small stuff like kyosho and tamiya. The 2 possibilites could arise.
1. he can make the layshaft just like i want, but price could shoot up to 30 GBP just for me to pay the guy.
2. He can't make the spline slots at all.

So as a back up, we may have to go with the pin slot pulley. Now we have to decided within this week, which 14T pulley out there will suit our needs, make me a proposal and someone send a sample to me please.

[adam lancia]

Booooo to the small scale problems

I don't mind the idea of the pin pulley system. You can then change the ratio front to back a little bit as there is probably enough slack in the rear belt to accommodate a 15 tooth rear pulley. I'd love to tinker with that a bit Thanks for all your work on this alcyon, I'm looking forward to having enough cash in my paypal account to pick up a few things from you when the time comes this summer

[isobarik]

Originally Posted by adam lancia

Booooo to the small scale problems

I don't mind the idea of the pin pulley system. You can then change the ratio front to back a little bit as there is probably enough slack in the rear belt to accommodate a 15 tooth rear pulley. I'd love to tinker with that a bit Thanks for all your work on this alcyon, I'm looking forward to having enough cash in my paypal account to pick up a few things from you when the time comes this summer

have the TF4 wich uses 15 tooth shall se if i can make the layshaft fit...

on the zxs there are lot of slack both front and rear

mvh Isobarik

[Welshy40]

Originally Posted by isobarik

have the TF4 wich uses 15 tooth shall se if i can make the layshaft fit...

on the zxs there are lot of slack both front and rear

mvh Isobarik

Iso the zxs rear has vertually no slack and shouldnt be tighter. Do you have a part number for the 14 tooth pulley so i can buy one.

[Welshy40]

Originally Posted by alcyon

I just came back from the machinist. He says he may have trouble making the spline slots becuase they are too small for his machines. He also told me he had to do the B4 side manually becuase it was too small for his CNCs. I know you might ask me, why not go to another machinist? Well i work as a design enginneer at a machine making company, and this guy is one my workplace suppliers, and i find his company to be reliable and keeps his promises and at reasonable cost. Of course i could try asking other places but i suspect the answer will be the same. You see most of the industry in malaysia is in medium to heavy industries, so i doubt there are any who make small stuff like kyosho and tamiya. The 2 possibilites could arise.
1. he can make the layshaft just like i want, but price could shoot up to 30 GBP just for me to pay the guy.
2. He can't make the spline slots at all.

So as a back up, we may have to go with the pin slot pulley. Now we have to decided within this week, which 14T pulley out there will suit our needs, make me a proposal and someone send a sample to me please.

Cost is still good for what he can do. If i can get a pulley i will and send on as all that will be needed is a section added thats allen keyed to the layshaft so the bearing is holding the load correctly.

[alcyon]

Originally Posted by adam lancia

Booooo to the small scale problems

I don't mind the idea of the pin pulley system. You can then change the ratio front to back a little bit as there is probably enough slack in the rear belt to accommodate a 15 tooth rear pulley. I'd love to tinker with that a bit Thanks for all your work on this alcyon, I'm looking forward to having enough cash in my paypal account to pick up a few things from you when the time comes this summer

haha adam, i dont think a 15T will fit in the current rear gearbox, as it is a 14T is already just nice and the belt feels just right too. I wonder what do you mean by few things, when i will only have the layshaft for sale ?

Originally Posted by isobarik

have the TF4 wich uses 15 tooth shall se if i can make the layshaft fit...

on the zxs there are lot of slack both front and rear

iso, please watch out for the pulley width. if i am not mistaken the belt width for the Lazer is 5mm, so the pulley must be at least 5.5mm wide internally. and if possible in 14T, perhaps a drift car pulley could work? i will try to search for the yokomo DRB or some drift car pulley. also the tf4 has been obsolete since 2005. may not be so wise to choose this car's parts.

Originally Posted by welshy40

If i can get a pulley i will and send on as all that will be needed is a section added thats allen keyed to the layshaft so the bearing is holding the load correctly.

Welshy, i dont think thats necessary, a pin slot type pulley like my Kawada touring car should work great. on the kawada TC, there is no allen key grub screw, you just slide in the pulley and tighthen the side nuts, usually with a small amount of play sidewards, and i never had any problems on my TC even with a lot of boost and turbo on my ESC. When you place in the one way and the end locknut, that is enough to keep the pulley from sliding left and right.

[alcyon]

just found this for a drift car, though its a little long, i think it may be possible to use because i can shorten the right side of the shaft a little, the tricky part will be how to tighthen the grub screw with the current gearbox in place? also need to use 4mm wide belts cause the pulley width is 4.4mm. after an hour of searching on the net i only found this. any of you can find the slot type? i found some slot type for kyosho gas cars but its 19T the smallest..

[sz3]

Maybe it helps, according to this older thread (in german):
https://rcworld.ch/board/forum_posts.asp?TID=9635&PN=7

Maedler (http://www.maedler.de) seems to be able to create the 14t pulleys for about 15€ a piece. They also have branch offices in malaysia and the uk.

[isobarik]

Originally Posted by alcyon

just found this for a drift car, though its a little long, i think it may be possible to use because i can shorten the right side of the shaft a little, the tricky part will be how to tighthen the grub screw with the current gearbox in place? also need to use 4mm wide belts cause the pulley width is 4.4mm. after an hour of searching on the net i only found this. any of you can find the slot type? i found some slot type for kyosho gas cars but its 19T the smallest..

Alcyon look at the superijcon shop they have alot of the 14 pylleys and even the diff 32 t pulley in alu ....

mvh isobarik

[Welshy40]

Originally Posted by alcyon

haha adam, i dont think a 15T will fit in the current rear gearbox, as it is a 14T is already just nice and the belt feels just right too. I wonder what do you mean by few things, when i will only have the layshaft for sale ?




iso, please watch out for the pulley width. if i am not mistaken the belt width for the Lazer is 5mm, so the pulley must be at least 5.5mm wide internally. and if possible in 14T, perhaps a drift car pulley could work? i will try to search for the yokomo DRB or some drift car pulley. also the tf4 has been obsolete since 2005. may not be so wise to choose this car's parts.



Welshy, i dont think thats necessary, a pin slot type pulley like my Kawada touring car should work great. on the kawada TC, there is no allen key grub screw, you just slide in the pulley and tighthen the side nuts, usually with a small amount of play sidewards, and i never had any problems on my TC even with a lot of boost and turbo on my ESC. When you place in the one way and the end locknut, that is enough to keep the pulley from sliding left and right.

How are you going to hold the layshaft on the outer gearbox bearing as the one way is holding the rear end of the layshaft in the bearing so guess you will need allen keying that section onto the other end so its situated securly against the bearing.

[alcyon]

Originally Posted by Welshy40

How are you going to hold the layshaft on the outer gearbox bearing as the one way is holding the rear end of the layshaft in the bearing so guess you will need allen keying that section onto the other end so its situated securly against the bearing.

i will go restudy this and perhaps sketch it out for you to see.
anyway you now have the original drawing and see what you can do at your end.

[alcyon]

Originally Posted by isobarik

Alcyon look at the superijcon shop they have alot of the 14 pylleys and even the diff 32 t pulley in alu ....

mvh isobarik

iso, i cannot find such a shop with google, do you have the link?

[alcyon]

Originally Posted by sz3

Maybe it helps, according to this older thread (in german):
https://rcworld.ch/board/forum_posts.asp?TID=9635&PN=7

Maedler (http://www.maedler.de) seems to be able to create the 14t pulleys for about 15€ a piece. They also have branch offices in malaysia and the uk.

i have just checked maedler website, seems the closest they have is HTD 3, not S3M, even then their minimum pulley width is 9mm, Misumi is better that they have S3M with 7mm internal width and 11mm total width. but anyway it may not be necessary as Welshy said there might be a guy close to him who could do the splines. and my machinist has not said no yet. whatever it is i will download the MISUMI 3D cad for the pulley and work out the alternative design.

[isobarik]

Alcyon

Im at work so if you got the time the link is on here otherwise i will post it when i get home.

http://www.rc-race-and-drift-japan.c...oducts_id=2639

They look like these exactly but of course with 14 instead of 13 tooth

mvh Isobarik

found this they have em

http://www.myrcstation.com/webshaper....asp?catID=110

[Welshy40]

That shops in your neck of the woods and the one id like is the blue one way 14t pulley as you can use the one way the opposite way around, but if we can get the spline made at a reasonable cost this wont be needed. Im thinking a cheaper option on the spline and thats cutting an original one down from a a zx or zxr mk1 to fill the void for the bearing. That way we dont need to machine it and only need to worry about the layshaft.

Actually ive just cut an original zx one (took the plate off) and after doing that is roughly half a mm longer than the current one way. We should use the one way on the other side and may just need a spacer from that to the b4 plate and is easy as the zx has a spacer that can be cut to size. As its reversed the one way wont work if your driving forwards, and will work. Im testing this next week when i get my gearbox sides.

Also just measured the b4 spur gear hole which is 5mm and width is almost 3mm and the one i designed for the zx is 8mm and width is roughly 3mm

[alcyon]

Originally Posted by Welshy40

That shops in your neck of the woods and the one id like is the blue one way 14t pulley as you can use the one way the opposite way around, but if we can get the spline made at a reasonable cost this wont be needed. Im thinking a cheaper option on the spline and thats cutting an original one down from a a zx or zxr mk1 to fill the void for the bearing. That way we dont need to machine it and only need to worry about the layshaft.

Actually ive just cut an original zx one (took the plate off) and after doing that is roughly half a mm longer than the current one way. We should use the one way on the other side and may just need a spacer from that to the b4 plate and is easy as the zx has a spacer that can be cut to size. As its reversed the one way wont work if your driving forwards, and will work. Im testing this next week when i get my gearbox sides.

Also just measured the b4 spur gear hole which is 5mm and width is almost 3mm and the one i designed for the zx is 8mm and width is roughly 3mm

Yes i know myrcstation, its about 25km from where i live. however i never imagined you would want to use a one way on the rear. anyway, its best we carefully think this out first and work out the assembly on CAD rather than buying a pulley but cant use it. give me some time to re draw everyhting in 3D for the original ZX layshaft assembly and reconfirm all the important points, lets take this slow and steady. By the way since i have given half of my parts to the machinist, i need your help to measure your ZX assembly. i will make a drawing, post it here and you fill the blanks for me. Will be ready in few days time. what you said about cutting the original rear hub at the plate is interesting, but that would kind of place the B4 inner plate too far out, unless you can cut more, i can give you the dimension to cut tommorow. Basically we want the external face of the inner b4 plate to sit exactly where the rear hub flat flange was.
However we still need to "bond" the rear hub the new layshaft somehow,and we need to find more of the rear hub just in case we screw up cutting the existing one. will talk to you all soon. gotta sleep now, another long day at work tommorow. Goodnight everyone.