E-S Greyborg owners' pics

[chroot]

Hi Alan,

I happened saw Luke's video. HOLY CRAP his homemade ebike crushed EVERYONE! I mean his video worth a million words. I guess Luke just wanted another ES racer win instead that what I am seeing. Anyways good job crushed all gasoline motored bicycle and moped. I love it!

[Alan B]

Well, this is the Greyborg thread, and Luke's amazing ebike is not a Greyborg, so this is getting a bit OT. Unfortunately cooling is a problem and Luke's amazing bike couldn't last the 12 laps, so that is the coming challenge - better cooling!

On the Greyborg topic again, we saw wonderful performance from the Warp frame with Stevil's bike, and great performance from the Cromotor Hubzilla on Zombiess's ebike. I can't wait to see them joined together in one ebike!

Progress on my own Cromotored Greyborg Warp has stalled, I have a few problems to solve to get it moving again. I'm not building a race bike, more of a solid commuter, but it might be suitable for some low spirited racing at some point.

Next I need to sort out the freewheel fit and then get some wheels built...

[chroot]

True, I am looking forward get Greyborg frame someday but I am kinda in fence between 2 frames Greyborg vs Phasor frame. I am more commuter too but sometime I can be do the trails jump and adventure.

[Stevil_Knevil]

This did not suck



Someone yells, "Alright ..Stevil!!" @ :17 ..second through the Ring Of Fire on my 'Borg..

[Stevil_Knevil]

[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.