E-S Greyborg owners' pics

[Kiwi]

Hi,

I have upgraded the greyborg torque arm now all these fat motors are kicking about.
The main arm is 5mm stainless with a secondary arm 5mm, so a total of 10mm on the axle.

The secondary arm is available to those who want to upgrade their torque arm.

Kiwi

[gensem]

Looks really good... i ll order a couple to be safe with multiple kilowatts at the back wheel.

[Alan B]

Looks wonderful Kiwi. Is there a 16mm x 10mm axle version for the Cromotor? If so count me in for one!

[Kiwi]

well, I could open it out to 16mm and make that default. Those running 14mm axles there will some space but wont effect strength or axle loading. I'll do that.

[Kiwi]

Hi Guys,
Please post some photos of the cromotor in a frame with a disk. I hear it does not work?
No point in cutting new arms if they wont work. Perhaps I can find a solution.

[gensem]

Hi Guys,
Please post some photos of the cromotor in a frame with a disk. I hear it does not work?
No point in cutting new arms if they wont work. Perhaps I can find a solution.

I have two cromotors and they do work with disks no problem, but im not using the warp frame now.

[Alan B]

WIth help from Stevil and acuteaero I put my Cromotor in my Warp frame and got it running yesterday. Here is Stevil testing it.

It appears to me that there is insufficient room for a rear disc on mine. I will take and post detailed photos in a few days. It may just be my swingarm, there may be some variation.

[Alan B]

Hi Guys,
Please post some photos of the cromotor in a frame with a disk. I hear it does not work?
No point in cutting new arms if they wont work. Perhaps I can find a solution.

[Kiwi]

Hi,
Last night I spent drinking Italian wine.
...at Cicadas place with his greyborg and cromotor.
We looked at the disk options.
To fit a disk, the disk would have to be 280mm diameter, with an adapter plate and a torque arm with calliper mount to suit.

I could do this, sell a custom cut disk, and torque arm. But I am asking myself, is it worth my time, what are we talking, 10 people?
A high regen setting will give 50% breaking power over a disk?

What do you think, is it worth designing a disk kit for the rear?

Kiwi

[Alan B]

Thanks for considering the project.

I want a rear disc brake on my Cromotored Greyborg. Regen is nice but not exactly a brake. I would like to have both.

I can't predict how many would sell. It really depends on how many frames they make in the coming days. Lots of motors out there now, but few frames.

[Animalector]

This is a bit of a general question.. BUT.. Can regen be like a brake? ie if I could build a brake lever with a proportional PWM output based on lever position, and feed that to the regen input on the controller would you end up with a regen-brake with reasonable modulation?

Andy

[Alan B]

This is a bit of a general question.. BUT.. Can regen be like a brake? ie if I could build a brake lever with a proportional PWM output based on lever position, and feed that to the regen input on the controller would you end up with a regen-brake with reasonable modulation?

Andy

It can, though the amount of power the motor can generate at low speed is very low so the braking force there is weak.

The problem with this idea is that the regen input on the controller goes to the microcomputer and into the software. It has a slow response so sending in a rapidly changing PWM signal is not likely to produce the desired result. The concept is good, but it must be done internally in the controller's software. Hence the need for a better controller.

[HAL9000v2.0]

Last week I finaly found some time to finish my greyborg.
Fork is DNM 180mm with dual 8piston Gator brake in the front and single 6 piston rear.
BigDia motor, Kelly, Headway, Schlumpf drive with HTD belt, 75mm rims, 3" beach bums tyres etc....

[sn0wchyld]

Last week I finaly found some time to finish my greyborg.
Fork is DNM 180mm with dual 8piston Gator brake in the front and single 6 piston rear.
BigDia motor, Kelly, Headway, Schlumpf drive with HTD belt, 75mm rims, 3" beach bums tyres etc....

very nice mate! Id like to know how you got the twin front breaks?

[Kepler]

Bike looks super Hal. How do the twin 8 pots feel? I have the single 8 pot setup on my Bomber and they have plenty of breaking force. However, you do need to give them a good squeeze as apposed to my Magura's on my Fighter that just need one finger force to get the nose dipping. Are you finding the twin setup gives you a lighter feel?

So a bit more detail please.
How many Watts are you running?
How many W/hrs on board?
How fast?
How heavy?

[Alan B]

I have the dual 4-pot front Gators on my Greyborg. They also require significant lever force, but brake nicely with good modulation. They take a lot more force than my Hayes hydraulics.

[Tommy L]

Last week I finaly found some time to finish my greyborg.
Fork is DNM 180mm with dual 8piston Gator brake in the front and single 6 piston rear.
BigDia motor, Kelly, Headway, Schlumpf drive with HTD belt, 75mm rims, 3" beach bums tyres etc....

Awesome Triple TREE! and BRAKES! Very Nice Work Here!

Tommy L sends..... \\m//

[HAL9000v2.0]

very nice mate! Id like to know how you got the twin front breaks?

The problem is to make good position of calipers not to hit the spokes on wide rims. So I made new adapters, new hub and new disc holder. It is basicly my product. They are available at Accountant's and mine web shop (Soon online for now just PM Accountant). We are thinking to sell it as a set. Dual fork, dual custom hub, adapters and brakes even a rim..

Bike looks super Hal. How do the twin 8 pots feel? I have the single 8 pot setup on my Bomber and they have plenty of breaking force. However, you do need to give them a good squeeze as apposed to my Magura's on my Fighter that just need one finger force to get the nose dipping. Are you finding the twin setup gives you a lighter feel?

To be honest it is a overkill. You can block front wheel on 30kmh even with this monster tyres.
I didn't find that I have to squize more then let say Magura MT6 (old Julia). Difference is on lighter breakings, it have no "slow engagement" ( don't know how to explain it) but they start to brake emediatly. That is something that is thrilling and therifying in the same time. But when you used to id it is nice. Feelss like they work faster then other brakes. Frend of mine broke collar bone trying one of my bikes at 5kmh. He was not used to so much stopping power ad squized like on his shimano brakes. He was flying over the steerer in no time... It is deadly stopping power as the advertisment say. Over 50km/h you can use it properly

How many Watts are you running?

Keb72801X controler on 84V

How many W/hrs on board?

For now 28S10Ah headway but in few days 28s A123 20Ah. It is max that can fit under canopy with bms and controller but no charger.

How fast?

93 km/h with 72kg,1,7m driver and 87km/h With me (105kg 1,85)
CA hit 385A peak althou continuus max is somewhere around 155A.
It is in one period when is fresh of charger, voltage drops just below HVC and motor is cold.

How heavy?

47kg

[comradegerry]

Your bike is looking sweet Hal, very impressive!

Hope you get plenty of time this summer to ride the trails.

[Kepler]

Impressive stuff. So presuming you voltage is sagging to 70V under full load, at 155A continuous, you have around 11kW (again continuous) Looks like peaks over 15kW would be a common occurrence. Nice.

[gensem]

Hi,
Last night I spent drinking Italian wine.
...at Cicadas place with his greyborg and cromotor.
We looked at the disk options.
To fit a disk, the disk would have to be 280mm diameter, with an adapter plate and a torque arm with calliper mount to suit.

I could do this, sell a custom cut disk, and torque arm. But I am asking myself, is it worth my time, what are we talking, 10 people?
A high regen setting will give 50% breaking power over a disk?

What do you think, is it worth designing a disk kit for the rear?

Kiwi

Hal already know about the issue and should come with a solution in the coming months.
But for now if you have the first cromotor you ll not be able to use 203mm disks because the motor axle is short (smaller rotors should fit).
Second cromotor has a longer axle so the bending and fitting should be doable.
Either way a custom 280mm disk is not a bad idea, there are not many warp frames being used now but im sure the number ll raise.

[cassschr1]

Tell us about the fit of the a123 pouch cells in this frame, with pictures would be nice. markobetti posted that a123 would be slightly bent. is this correct?
What are the wider covers for, (this is from a while back, months)many on es probably don't know about them, in what situation were these required?
Also you showed a picture of a a123 pack that was like a SLA battery, did those show up?
I've been sitting on the fence, cause of the question of a123 pouch fit in the frame. Cass

[HAL9000v2.0]

Tell us about the fit of the a123 pouch cells in this frame, with pictures would be nice. markobetti posted that a123 would be slightly bent. is this correct?
What are the wider covers for, (this is from a while back, months)many on es probably don't know about them, in what situation were these required?
Also you showed a picture of a a123 pack that was like a SLA battery, did those show up?
I've been sitting on the fence, cause of the question of a123 pouch fit in the frame. Cass

I have put some pictures of fitting A123 into warp frame few months (or years) ago. If I don't find them I will make another and put it here.

[Rodney64]

Hal, very nice build. I'm currently working on my first build. Can't wait to start putting it all together.

[sanford]

Hal, looks awesome. Couple questions; What is the BigDia motor? And what kickstand do you use. Cheers.