Search found 79 matches

by mbgjt1
Dec 16 2020 6:22pm
Forum: EBike Technical
Topic: How to get the most power out of a QS205 50H?
Replies: 48
Views: 2170

Re: How to get the most power out of a QS205 50H?

Good discussion already but I'll report anyway that I'm super happy with my QS205 4T in a "20 inch" moped rim (Tire OD = 24.15 inches) + ferrofluid + HubSinks + 10mm² phasewires + BAC 8000 (300A battery, 450 phase). I hit 65mph with 50% field weakening with a bit of power to spare. Withou...
by mbgjt1
Dec 15 2020 3:53am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1577
Views: 177110

Re: Nucular electronics - complete kit for ev! [beta]

first post says the nuclear 24F controller is rated for 20 kW max... yet it has an output current of 300 amps at a maximum voltage of 90 V. Doesn't that mean its rated for 27 kW max? Most such ratings are "whichever limit you hit first applies" So at lower rpm amps is your controlling lim...
by mbgjt1
Dec 15 2020 3:51am
Forum: EBike General Discussion
Topic: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?
Replies: 23
Views: 803

Re: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?

Thanks for the tool but is this accurate? Define accurate... My bike does 0-60km/h in 4.9 seconds, and my tool says 5.34 seconds. Accurate enough ? I think that's very accurate, BTW I tried riding a 125cc dirt bike today and was blown away by the acceleration so I think even 0 to 60 in 4.9 seconds ...
by mbgjt1
Dec 15 2020 3:49am
Forum: EBike General Discussion
Topic: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?
Replies: 23
Views: 803

Re: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?

I set up this config for a while using : 28s lipos 118v Also at 30s charged to 123v....just to see apt96600 controller QS273 3.5tx19" .....it was a bit of an animal :shock: Having said that my current setup -according to the chart - 0- 40 kmh is 1.60 seconds and 0- 80 kmh is 4.50 seconds. This...
by mbgjt1
Dec 15 2020 3:49am
Forum: EBike General Discussion
Topic: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?
Replies: 23
Views: 803

Re: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?

Thanks mate Given the choice do you prefer your qs273 3.5T or the qs205 3t coupled to the nuclear 24f controller? I've got one on order too so should be exciting to see what I'd get BTW ill be running a 21s battery with the controller to reach a max of 88 V I don't think I'll risk the 92V which is o...
by mbgjt1
Dec 14 2020 9:07pm
Forum: EBike General Discussion
Topic: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?
Replies: 23
Views: 803

Re: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?

serious_sam wrote:
Dec 12 2020 10:17pm
On a more serious note, it looks like superbikes are getting 0-100km/h in around 2.5 seconds, so should be possible to keep the front wheel down for 3 second pass if the CG isn't too far back or high.
3 seconds might be too quick I'll be happy with 5 :D :lol:
by mbgjt1
Dec 14 2020 9:07pm
Forum: EBike General Discussion
Topic: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?
Replies: 23
Views: 803

Re: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?

No point continuing on this thread :roll: :lol: :lol: :lol: No point posting any vids as you get acused of faking them. Test rides are available for serious builders in UK Or just find out the hard (and very expensive ) way by your own trial and error :confused: yeah but what's the point of posting...
by mbgjt1
Dec 14 2020 8:53pm
Forum: EBike General Discussion
Topic: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?
Replies: 23
Views: 803

Re: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?

I set up this config for a while using : 28s lipos 118v Also at 30s charged to 123v....just to see apt96600 controller QS273 3.5tx19" .....it was a bit of an animal :shock: Having said that my current setup -according to the chart - 0- 40 kmh is 1.60 seconds and 0- 80 kmh is 4.50 seconds. This...
by mbgjt1
Dec 14 2020 8:48pm
Forum: EBike General Discussion
Topic: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?
Replies: 23
Views: 803

Re: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?

Can you get 0 to 100 kph in under 5 seconds? Is this possible for a QS205 in a rear hub configuration? You'd need about 800 phase amps without saturation...so...probably not... Here is a tool to play with. Enjoy. Acceleration.xlsx Thanks for the tool but is this accurate? It is telling me that I wi...
by mbgjt1
Dec 14 2020 8:44pm
Forum: EBike General Discussion
Topic: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?
Replies: 23
Views: 803

Re: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?

I''ve tried simulations through the Grin motor simulator but the fastest I've got is 9 to 10 seconds 0 to 100 kph, now all I need is to figure out how to halve that time! Four times as much power would be a good start. Compare the output difference between murder vehicles that go 0-60 in ten second...
by mbgjt1
Dec 14 2020 8:42pm
Forum: EBike General Discussion
Topic: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?
Replies: 23
Views: 803

Re: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?

No ones out there timing their 0-60 times on their ebike, they are out there riding, smiling and having fun! :thumb: To be honest I don;t want to design something which is slower and then end up wishing I made changes to speed up acceleration I know trial and error is the way to go sometimes but I ...
by mbgjt1
Dec 14 2020 8:41pm
Forum: EBike General Discussion
Topic: Calculating 0 to 80kph acceleration times. Are my Grin Tech Calculations Correct? QS 205 3T vs. 4T
Replies: 14
Views: 816

Re: Calculating 0 to 80kph acceleration times. Are my Grin Tech Calculations Correct? QS 205 3T vs. 4T

Buddy is going to end up with 3 ebikes, the first being a dragster, second beach cruiser and third mountain bike trail rider. Yet he doesnt have the money to mess up his drag bike. Something seems amiss tbh but we play along. BTW people can brag all they want, do they have evidence is the question ...
by mbgjt1
Dec 14 2020 8:39pm
Forum: EBike General Discussion
Topic: Calculating 0 to 80kph acceleration times. Are my Grin Tech Calculations Correct? QS 205 3T vs. 4T
Replies: 14
Views: 816

Re: Calculating 0 to 80kph acceleration times. Are my Grin Tech Calculations Correct? QS 205 3T vs. 4T

Building a drag bike with a wheel motor is delusional. Acceleration does require gearing down to achieve competitive numbers. It does require a geometry design to be able to take full advantage of such acceleration. Then, the bike becomes a one-purpose specially that does not Make a good ride for a...
by mbgjt1
Dec 14 2020 8:36pm
Forum: EBike General Discussion
Topic: Calculating 0 to 80kph acceleration times. Are my Grin Tech Calculations Correct? QS 205 3T vs. 4T
Replies: 14
Views: 816

Re: Calculating 0 to 80kph acceleration times. Are my Grin Tech Calculations Correct? QS 205 3T vs. 4T

Why are you only using 5P? With the VTC6, max discharge current is 30 Amps so you're getting 150 Amps max out of that battery pack... you could probably dump doulble that current into the motor. I wonder how things would change if you start running at 21s10p of VTC6! The problem is heat. If you jus...
by mbgjt1
Dec 14 2020 8:18pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1577
Views: 177110

Re: Nucular electronics - complete kit for ev! [beta]

Can someone please clarify something for me... the first post says the nuclear 24F controller is rated for 20 kW max... yet it has an output current of 300 amps at a maximum voltage of 90 V.

Doesn't that mean its rated for 27 kW max?
by mbgjt1
Dec 11 2020 3:56am
Forum: EBike General Discussion
Topic: Calculating 0 to 80kph acceleration times. Are my Grin Tech Calculations Correct? QS 205 3T vs. 4T
Replies: 14
Views: 816

Re: Calculating 0 to 80kph acceleration times. Are my Grin Tech Calculations Correct? QS 205 3T vs. 4T

As you can see it would take 9.26 seconds to accelerate from 0 to 80.7 kph. Does with match up with real life results? It seems abit slow. How can I reduce this time to 5 seconds or less? The motor will be mounted at the back wheel as a hub configuration, not a mid drive. Any advice? What am I miss...
by mbgjt1
Dec 11 2020 3:50am
Forum: EBike General Discussion
Topic: Calculating 0 to 80kph acceleration times. Are my Grin Tech Calculations Correct? QS 205 3T vs. 4T
Replies: 14
Views: 816

Re: Calculating 0 to 80kph acceleration times. Are my Grin Tech Calculations Correct? QS 205 3T vs. 4T

markz wrote:
Nov 20 2020 6:32pm
"4.3 seconds is still slow"
:shock:

You building a drag strip ebicycle?
I would love a 4.3 seconds 0 to 100 kph / 60 mph!

I can't seem to get a proper answer with regards to whether or not I can achieve this with a QS205 hub motor
by mbgjt1
Dec 11 2020 3:48am
Forum: EBike General Discussion
Topic: Calculating 0 to 80kph acceleration times. Are my Grin Tech Calculations Correct? QS 205 3T vs. 4T
Replies: 14
Views: 816

Re: Calculating 0 to 80kph acceleration times. Are my Grin Tech Calculations Correct? QS 205 3T vs. 4T

Those numbers are estimate, not reality checked. Your build can do better, or worse. Best acceleration is achieved with: smaller wheel, lighter weight, lower aero drag. Hey man, I want to accurately determine if it is possible to get these speeds. There are people out there bragging that they can r...
by mbgjt1
Dec 11 2020 3:45am
Forum: EBike General Discussion
Topic: QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?
Replies: 23
Views: 803

QS205 users, what are your 0 to 60 mph (0 to 100 kph) times?

Hi all, if you've got a QS205 build as a rear hub configuration, what is your 0 to 60 mph or 0 to 100 kph times? I understand that a smaller rim diameter and weight reduction would give a faster time, but I would like some actual values please. Can you get 0 to 100 kph in under 5 seconds? Is this po...
by mbgjt1
Nov 20 2020 4:01pm
Forum: EBike General Discussion
Topic: Calculating 0 to 80kph acceleration times. Are my Grin Tech Calculations Correct? QS 205 3T vs. 4T
Replies: 14
Views: 816

Calculating 0 to 80kph acceleration times. Are my Grin Tech Calculations Correct? QS 205 3T vs. 4T

Hi all, So, I have been using the Grin Tech motor simulator to simulate what my acceleration will be like from 0 to 80 kph. The simulator does not have an option for the QS205 3T 50H V3 so I have gone with the Cromo 5004 and changed the kv to 15.6 (rpm/V). 17" rim, 24" outer diamter wheel....
by mbgjt1
Nov 16 2020 1:57am
Forum: EBike General Discussion
Topic: Thermo Nuclear 24F has a 4 - 5 month lead time! Any alternatives?
Replies: 11
Views: 875

Re: Thermo Nuclear 24F has a 4 - 5 month lead time! Any alternatives?

john61ct wrote:
Nov 14 2020 8:26pm
Put in your order for the Nucular.

Buy a cheap substitute - maybe from QS as a kit ?

to give sub optimal basics while you're waiting.
Have you used the Nuclear controller? What are the advantages of it over the other controllers which have similar power outputs?
by mbgjt1
Nov 16 2020 1:57am
Forum: EBike General Discussion
Topic: Thermo Nuclear 24F has a 4 - 5 month lead time! Any alternatives?
Replies: 11
Views: 875

Re: Thermo Nuclear 24F has a 4 - 5 month lead time! Any alternatives?

‘’Only rated 200 A battery’’ is enough to fry that motor, unless you have very good experience of frying motors and know by instinct how long (short) you can feed up to 250A to a QS205. Power limitation is not a good reason to buy a Nucular, because this power can be achieved much cheaper with many...
by mbgjt1
Nov 14 2020 8:08pm
Forum: EBike General Discussion
Topic: Thermo Nuclear 24F has a 4 - 5 month lead time! Any alternatives?
Replies: 11
Views: 875

Thermo Nuclear 24F has a 4 - 5 month lead time! Any alternatives?

I'm at the stage of my build where I need to buy a controller Hub Motor: QS205 V3 (3T or 4T - still undecided) laced in a 17" moto wheel. Battery: 22s14p 42Ah Samsung 30Q battery pack (79.2 V nominal voltage) Frame: Qulbix 140r Controller: ?? Rider weight: 75 kg I wish to feed a maximum of 300 ...
by mbgjt1
Nov 14 2020 7:58pm
Forum: Bike Mechanical & Structural
Topic: DNM USD 8 vs USD 8s for QULBIX 140r Moto frame?
Replies: 12
Views: 713

Re: DNM USD 8 vs USD 8s for QULBIX 140r Moto frame?

Sorry I had believed that you are on the same hemisphere as I We are end of season here, and it is easy to forget that some are living where the riding season is about to begin, and others have warm weather al year long. Yeah I am down in New Zealand, summer is rolling around at the moment. But to ...
by mbgjt1
Nov 14 2020 7:57pm
Forum: Bike Mechanical & Structural
Topic: DNM USD 8 vs USD 8s for QULBIX 140r Moto frame?
Replies: 12
Views: 713

Re: DNM USD 8 vs USD 8s for QULBIX 140r Moto frame?

The DNM USD forks are fine for firetrails (gravel roads of good quality), and fine for street. Anything like a rocky road, or proper trail riding and they are pretty bad to be honest. Very sharp response over small bumps, little feel. I would avoid them if you can afford something better. I've been...