Stealth Bomber goes Adaptto at 12kW

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Allex   1 GW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by Allex » Apr 15 2015 10:13am

macribs wrote:@Allex.

I had no idea OVS was so insane. In fact speed increase from 70-100 km/h is a 42,9% improvement.
That is just off the charts. I was hoping OVS would yield at best 10-12 km/h or maybe even 15-20%. But you actually gets a 43% higher speed.

What current are the max-e pumping out increasing from 70 and up to max?
The current it will pump up is the power you need to reach that speed. So for 100km/h you need around 8-9kW(I believe) ~110amps on 20s
But here is a little catch. If OVS5 is what you need to reach 100km/h it will start to lower the current when you are close to that top speed.
So if you are using to much OVS, in our axamle 7, it will continue to push maximum current even at 100km/ because you tell the controller to go faster, but it cannot push you faster because it does not have more power - remember that effiency goes down at high OVS.
So it is essential to choose a suitable OVS value, otherwise it will just dump a lot of heat to the motor for nothing.

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ecross   100 W

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Re: Stealth Bomber goes Adaptto at 11kW

Post by ecross » Apr 15 2015 11:51am

Allex wrote:Do you mean 5403 motor?
You could use 24s but it will limit the current until it reaches 92Volts.
I suggest to charge your 24s to 98Volts
But in the case of 24s, dont use OVS, you can blow the FETs

Using 20s it is safe to have OVS7 with 22s probably OVS2?

OVS could give you about 30% of speed gain.
like when I tried MXUS 4t on 20s, it gave me 70km/h and with OVS5-7 the speed went up to 100km/h


Some mixed riding:
@Allex: Thanks for the great numbers, very interesting! So I can go down from my 24S to 20S (sorry only 20" BMX-Rim!) without less topspeed! And I have some more save running for the poor controller!?
NC 2805 mod.
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Siemens 2000W travel charger

knighty   10 kW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by knighty » Apr 15 2015 12:05pm

nice connector for the charger - I just ordered some :-)


biggest I could find are 30amp cont. 40amp for 1 min

bought a 4 pole so I can parallel up 2 pairs for my 70amp coil / probably 50amp charging max :-)

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macribs   1 GW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by macribs » Apr 16 2015 2:01pm

ridethelightning wrote:yeah the problem with ovs is ,once you turn it up, you dont want to turn it down anymore :lol:
Is there any reason to turn it down again? Except maybe to save some energy for a long ride. But other then that seems like this should be on by default :)

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Re: Stealth Bomber goes Adaptto at 12kW

Post by splitfire » Apr 16 2015 5:57pm

How much each of those 18650? Mah? What is your batt configuration .how many cells did you use? I want to buy these batteries but I dont have spot welding.

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chucho   1 kW

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Re: Stealth Bomber goes Adaptto at 11kW

Post by chucho » Apr 16 2015 6:52pm

bigbore wrote:This morning I got the circuit to use with the PAS.
This is roughly the schematic, the builder made some modifications at the final review.
There is the possibility to close the contact labeled Disabler in the pic and doing that the Throttle is connected to +5V as it is before adding the circuit.

Image

This is the circuit, it's very little (MANET is the Throttle input):

Image

Image

The builder added the feature called 6Km/h that override the PAS. Connecting together the orange wires with a switch it allows to ride the e-bike at a very low speed with out twisting the throttle for few seconds. It was introduced to move the e-bike up to a ramp just outside the garage for example.

The next days I will install the circuit inside the frame and I hope everything will work as expected. :D
Like it very much! Can you please send me a link to the product :wink:
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Re: Stealth Bomber goes Adaptto at 12kW

Post by arcticfly » May 01 2015 4:15am

I subscribe to this thread so I have the info readily available. My Stealth needs a new battery, so I might as well use yours as a guide.

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bigbore   1 kW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by bigbore » May 05 2015 4:04am

Transparent lower shield.
I made this protection with clear lexan of 2mm thikness to protect the wires under the Bomber from the dirt:
Image
Image
Last edited by bigbore on May 10 2018 1:37pm, edited 2 times in total.

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bigbore   1 kW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by bigbore » May 05 2015 4:49am

Front light cheap and very bright:
I bough this front light here: http://www.banggood.com/5000Lm-CREE-XM- ... 08550.html

And I made the mount with a carbon fiber plate of 3mm thickness and ah half cylinder to adjust the position:
Image
Image
Image

I have been buying from bangood from some years and never had any issue yet but this time they didn't included the charger. Than I discovered a funny thing. I decided to use the included battery but the connector on the battery wire can't pass trough the hole in the frame so i decided to desolder the wires from the battery and pass just the wires then solder the wires on the battery again.
Look what I found out after removing the shrink wrap:
Image
Image

There are 3 fake cells and only one connected to the wire :shock:

So I removed the fake cells and solder the wires on the pink cell only, at least the pack is very light :mrgreen: I will check for run time and decide if I will need some more capacity
Image

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fsmuggen   10 W

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Re: Stealth Bomber goes Adaptto at 12kW

Post by fsmuggen » May 05 2015 7:22am

Ah :D nice one.. are the blue ones totaly fake? like made of plastic or wood?:D

SlowCo   10 kW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by SlowCo » May 05 2015 9:09am

Didn't you read the warning in their ad?:
Do not disassemble the battery pack, so as not to affect product performance and safety hazard.

Or would that warning be there more in the hope nobody will find the dummy cells... :lol:

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bigbore   1 kW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by bigbore » May 05 2015 4:37pm

fsmuggen wrote:Ah :D nice one.. are the blue ones totaly fake? like made of plastic or wood?:D
These ones are real Li-Ion cells but one of them is crap because it's voltage is 0,7V, the other 2 are in the correct voltage range but I didn't try to charge or discharge them yet.

cwah   10 GW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by cwah » May 05 2015 7:52pm

nice job
Help me find my stolen electric brompton: http://bit.ly/1a0vbBC and Bosch Sinus B3 http://bit.ly/1eV0WQz

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Rix   100 GW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by Rix » May 05 2015 7:58pm

Very nice Grande Cilindro! I really like that skid plate. Bummer with the bogus cells. I can't believe some manufactures would make garbage cells like that.

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Re: Stealth Bomber goes Adaptto at 12kW

Post by MurderousFrog » May 18 2015 8:08am

Nice job!
How did you wire the speakon connector on the bike side?
Do you have to manually disconnect the motor phase wire for charging?

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Allex   1 GW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by Allex » May 18 2015 8:13am

No, no disconnection, just plug in the speakon and charge!
From one of the speakon tabs, the wire goes to one of the motor phase cables, second one goes to controller charge connector.

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Offroader   10 MW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by Offroader » May 27 2015 11:04am

Allex, I'm going to mount the temp probe similar to how you mounted yours on the windings.

I was wondering if you really need the red high temp silicone? Regular silicone is rated to work up to 200 degrees Celsius. Will the windings really see temps higher than 200 degree Celsius?

Do you really think red is needed or should any work? Reason I ask is because I Have lots of regular silicone that I could use.

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Allex   1 GW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by Allex » May 27 2015 2:22pm

Should work, unless you push it further than 200 :)

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fsmuggen   10 W

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Re: Stealth Bomber goes Adaptto at 12kW

Post by fsmuggen » May 28 2015 4:04pm

Here is a Easy way to connect the GL circuit to the adaptto and throttle.
adaptto gl modul.jpg
adaptto gl modul.jpg (66.05 KiB) Viewed 1553 times

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madm3chanic   100 W

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Re: Stealth Bomber goes Adaptto at 12kW

Post by madm3chanic » Jun 02 2015 10:05pm

subscribed for future reference :)

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Re: Stealth Bomber goes Adaptto at 12kW

Post by kamdenburke » Jun 26 2015 12:38am

I just read through this entire thread. Do we know how far you can go on a charge without pedaling? What is your wh/mi usage on average?

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Re: Stealth Bomber goes Adaptto at 12kW

Post by Theodore Voltaire » Jun 26 2015 2:00am

kamdenburke wrote:I just read through this entire thread. Do we know how far you can go on a charge without pedaling? What is your wh/mi usage on average?
It all depends how fast you want to go.

Without pedaling,

I estimate my Bomber will go 50 miles, cruising @ 20 mph with no headwind, and very little or no stopping.

Riding 50 mph, with no pedaling it's about 18 miles

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bigbore   1 kW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by bigbore » Jun 26 2015 2:28am

This is the first recorded data I had on a trip emptying the battery.
It was with little pedaling effort (ghost pedaling) with a pretty strong front wind. The power level was about 2Kw almost all the time.
I travelled 71Km using 28.3Ah, 2042Wh, 28.7Wh/Km and average speed was 45.6Km/h, remember that this is not a stock Bomber battery & controller.

Image

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Rix   100 GW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by Rix » Jun 26 2015 12:51pm

Excellent numbers Simone, what was your volt sag like at the end of your ride?

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bigbore   1 kW

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Re: Stealth Bomber goes Adaptto at 12kW

Post by bigbore » Jun 26 2015 5:01pm

Rix wrote:Excellent numbers Simone, what was your volt sag like at the end of your ride?
Resting battery voltage was 62V (I reached LVC) and the cells was around 3.11V each one. This was the BMS screen just after the ride:
Image

And this was the main screen:
Image
Last edited by bigbore on Jul 02 2018 11:47am, edited 1 time in total.

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