new-old build

[LI-ghtcycle]

Ok, I tried reading up on this on the net, and didn't find any real good explanation, but if I understand correctly, each reduction is makes the total reduction about 7 to 1 and 4 to 1 making a total of 11 to 1? (75 to 11 and 73 to 18?)

If that is correct, then I will not need half as much reduction as I thought! especially since I will only be using 5s (18.75V) and a 130 Kv Turnigy motor (80 - 100) I might up the voltage to 6S if there is much advantage, but for my use, a smaller battery requiring less voltage will be ideal.

 

[gwhy!]

Ok, I tried reading up on this on the net, and didn't find any real good explanation, but if I understand correctly, each reduction is makes the total reduction about 7 to 1 and 4 to 1 making a total of 11 to 1? (75 to 11 and 73 to 18?)

If that is correct, then I will not need half as much reduction as I thought! especially since I will only be using 5s (18.75V) and a 130 Kv Turnigy motor (80 - 100) I might up the voltage to 6S if there is much advantage, but for my use, a smaller battery requiring less voltage will be ideal.

No, the reduction is 4 x 7 so total reduction is 28 , you times them not add.

 

[LI-ghtcycle]

Ok, I tried reading up on this on the net, and didn't find any real good explanation, but if I understand correctly, each reduction is makes the total reduction about 7 to 1 and 4 to 1 making a total of 11 to 1? (75 to 11 and 73 to 18?)

If that is correct, then I will not need half as much reduction as I thought! especially since I will only be using 5s (18.75V) and a 130 Kv Turnigy motor (80 - 100) I might up the voltage to 6S if there is much advantage, but for my use, a smaller battery requiring less voltage will be ideal.

No, the reduction is 4 x 7 so total reduction is 28 , you times them not add.

WOW! That's great! Well, if my 4S idea with single stage won't cut it, next I will go 8S and use the jack shaft! Thanks!

 

[rodgah]

gwhy!,

what fets are running in this controller on this bike? I am thinking of doing very similar on a new build, limited to under 30mph. If its 4110 fets then i can buy a lyen superdooper 6 fet but if its something exotic then I might not bother.

Rodger

 

[gwhy!]

gwhy!,

what fets are running in this controller on this bike? I am thinking of doing very similar on a new build, limited to under 30mph. If its 4110 fets then i can buy a lyen superdooper 6 fet but if its something exotic then I might not bother.

Rodger

Hi Rodger,
Its nothing exotic but its not the 4110..
its this one View attachment IRFB3077PbF.pdf
these have proved to be very reliable upto 70-80A ( for me ) in my 6 fet controllers.

 

[rodgah]

ah damn....if only these controllers were an off the shelf item! Looks like I will have 2 special orders from lyen soon.

:wink:

 

[Whiplash]

Gwhy that clamp for the jackshaft is GENIOUS! I can't wait for the bids of the action! Im getting back on my e bike projects but with a different angle using a new frame instead. Much easier and cheaper!!

 

[LightningRods]

Yes, in the immortal words of John Lennon, "Fooking Genius"! You should get some sort of Adaptive Engineering award for that. Well done!

 

[whereswally606]

ah damn....if only these controllers were an off the shelf item! Looks like I will have 2 special orders from lyen soon.

:wink:

They can be gotten from cellman. With the high current fets. Off the shelf so to speak. I forget the website name though.

 

[Okami]

Just wanted to comment on this awesome build! Even though this topic is already quite old, wanted to comment how nice and clean it looks and takes up very little space in the middle section of the bike.

Been planning to do one on my own (Rc 'mid drive') and drive the rear wheel on the other side, where the disk brake is located...

Non the less, I hope there was great fun using this bike, hoping to finish up mine soon!